From owner-fsj-digest-at-digest.net Mon May 12 23:21:47 2008 From: fsj-digest fsj-digest Tuesday, May 13 2008 Volume 01 : Number 3075 Forum for Discussion of Full Sized SJ Series Jeeps Brian Colucci Digest Coordinator Contents: fsj: creative filtering... fsj: it's just a part jim RE: fsj: it's just a part jim RE: fsj: it's just a part jim RE: fsj: it's just a part jim fsj: gearing Re: fsj: gearing fsj: gears Re: fsj: gears Re: fsj: gears Re: fsj: gears fsj: engine mount upgrade fsj: Re: Wagoneer? fsj: homemade fuel? fsj: smart cars and project progress Re: fsj: Re: Wagoneer? fsj: Diesel gearing... 3.31-->4.10 FSJ Digest Home Page: http://www.digest.net/jeeps/fsj/ Send submissions to fsj-digest-at-digest.net Send administrative requests to fsj-digest-request-at-digest.net To unsubscribe, include the word unsubscribe by itself in the body of the message, unless you are sending the request from a different address than the one that appears on the list. Include the word help in a message to fsj-digest-request to get a list of other majordomo commands. ---------------------------------------------------------------------- Date: Sun, 11 May 2008 23:01:21 -0700 (PDT) From: john Subject: fsj: creative filtering... just got back from seattle... picked up a "free" water filtering system, the AquaRain model 400. http://naturalfilters.bizland.com/store/index.html I don't understand why a double boiler soup pot with four ceramic filters in the top pot draining into the bottom pot should retail for $239.99. :) but I'm going to press it into WVO filtering service to feed Omega and Shadowfax... :) Certainly not large volumes... but this might be nice for on the road... we'll see... :) john ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- ------------------------------ Date: Mon, 12 May 2008 07:55:09 -0700 (PDT) From: john Subject: fsj: it's just a part jim that's right! surely some where there was a dodge, ford, mg, toyota, amc or even, just maybe a jeep part, BB, duct tape and chewing gum available... I think jimcguyver is getting soft... ...or maybe... just maybe, the jeep was green. :) ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- On Mon, 12 May 2008, FSJparts-at-yahoogroups.com wrote: # There is 1 message in this issue. # # Topics in this digest: # # 1a. Re: got a points dist for AMC V8 near Seattle? # From: Dave # # # Message # ________________________________________________________________________ # 1a. Re: got a points dist for AMC V8 near Seattle? # Posted by: "Dave" vwdoc1-at-gmail.com vwdoc2001 # Date: Sun May 11, 2008 8:47 am ((PDT)) # # If anyone could do it!.................;-) # # # --- In FSJparts-at-yahoogroups.com, Jim Blair wrote: # > # > There weren't any handy for an AMC V8 (even the parts stores didn't # have the AMC points dist) Found one last night just before close at # Olympic 4x4 and got it running with a quickie rewire. # > # > # > Re: got a points dist for AMC V8 near Seattle? # > Posted by: "Dave" vwdoc1-at-... vwdoc2001 # > Date: Fri May 9, 2008 7:02 pm ((PDT)) # > # > Or install a HEI distributor! # # ------------------------------ Date: Mon, 12 May 2008 09:43:21 -0700 From: Jim Blair Subject: RE: fsj: it's just a part jim There might be a Buick V8 HEI that would work with the right dist gear, but the last thing I want to do is destroy the cam gear in this guy's only set of wheels! Got it quick wired and functional so it's rolling, but he needs to hit the junkyard to get the alt brackets for his V8 (someone reached up from under the Jeep and cut a chunk of harness off the alt and yanked out the wires for the electronic ignition in the process then stole the brackets holding the alt in!) John wrote: that's right! surely some where there was a dodge, ford, mg, toyota, amc or even, just maybe a jeep part, BB, duct tape and chewing gum available... I think jimcguyver is getting soft... ...or maybe... just maybe, the jeep was green. :) _________________________________________________________________ Get Free (PRODUCT) RED^Y Emoticons, Winks and Display Pics. http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008 ------------------------------ Date: Mon, 12 May 2008 10:01:21 -0700 (PDT) From: john Subject: RE: fsj: it's just a part jim now THERE's the Jim we know and love... if ever I'm selected to be involved in junkyard wars or some oddball engineering event, Jim, I want you to be on my team. ;) ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- On Mon, 12 May 2008, Jim Blair wrote: # There might be a Buick V8 HEI that would work with the right dist gear, but the last thing I want to do is destroy the cam gear in this guy's only set of wheels! Got it quick wired and functional so it's rolling, but he needs to hit the junkyard to get the alt brackets for his V8 (someone reached up from under the Jeep and cut a chunk of harness off the alt and yanked out the wires for the electronic ignition in the process then stole the brackets holding the alt in!) # John wrote: # that's right! surely # some where there was a dodge, # ford, mg, toyota, amc or even, # just maybe a jeep part, BB, duct # tape and chewing gum available... # I think jimcguyver is getting soft... # # ...or maybe... just maybe, the jeep # was green. # # :) # _________________________________________________________________ # Get Free (PRODUCT) RED(TM) Emoticons, Winks and Display Pics. # http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008 ------------------------------ Date: Mon, 12 May 2008 09:54:03 -0700 From: Jim Blair Subject: RE: fsj: it's just a part jim I "could" have taken the guts out of the Motorcraft dist and put a points setup from a Ford points dist in (I did that before with a Ford 400 Cleveland I put into my '69 F250 in place of the 390 that was killed by a Kralinator filter that "fell off" on the highway. I think Fram bought them out and use the same equipment now) That would've been the next step if Steve hadn't got the points dist from Oly4x4. Oh yeah. I don't know what material Schuck's uses on their points, but I couldn't get ANY spark after installing new ones. Quick check with the ohmmeter told me there was an open circuit, so I dressed the points with the "strike match here" section of a match pack and it lit right up afterwards. _________________________________________________________________ Windows Live SkyDrive lets you share files with faraway friends. http://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refresh_s kydrive_052008 ------------------------------ Date: Mon, 12 May 2008 10:49:25 -0700 (PDT) From: john Subject: fsj: gearing I have an opportunity to regear my '91 Grand Wagoneer... I'll be installing the Detroit Electrac on Thursday... I'm wondering if I should change the gears from 3.31 to 3.73. The GMC Jimmy and 3/4t truck both had 3.73s, the Jimmy came with 31x10.5 tires. At highway speeds with the trailer in tow it seems to want to downshift... in traffic it's not exactly fast off the line and again at around 45 to 50 seems to like to drop a gear to accelerate. I'm thinking that 3.31s might be too steep... it has the 700R4 can't find the gear ratios right now... think it's about a .74 OD though engine info: Typical Specifications Displacement: 6.2L (379ci) Bore & Stroke: 3.98x3.80 inches HP -at- RPM: 135 -at- 3600 Torque -at- RPM: 240 -at- 2000 Compression Ratio: 21.3 Injection: Indirect, Mechanical, Stanadyne Rotary DB-2 Aspiration: Natural Max EGT: 1100max/900 sustained* from: http://www.oramagazine.com/archive/2004/08-august/0103-tech-finesse-2.asp so if max torque is at 2000 rpm I should shoot for that at 55-60 mph, right??? john ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- ------------------------------ Date: Mon, 12 May 2008 11:02:42 -0700 (PDT) From: john Subject: Re: fsj: gearing the 700r4 has been beefed up... 3.55 vs 3.31... might be better if I just run 235s... I think people saw the raised white letters and the tires looked smaller... only 6% difference between 235s and 31s. I think it goes 235, 30x9.5 and then 31x10.5 have to find the trans specs for the 700r4... john ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- On Mon, 12 May 2008, Kevin wrote: # My gut feeling is that for your setup, 3.55s, 31s, and overdrive should be # about right, assuming the trailer isn't too heavy. 3.73s might kill your # fuel economy on the highway. Remember, a wagoneer is heavier than a jimmy, # and that jimmy came out when 55 was the federal speed limit... # # Towing in OD might be a dicey proposition with a 700R4, for what it's worth. # If you locked it out, the 3.31s would be fine, but... # # On Mon, May 12, 2008 at 10:49:25AM -0700, john wrote: # > I have an opportunity to regear my '91 Grand Wagoneer... # > # > I'll be installing the Detroit Electrac on Thursday... # > # > I'm wondering if I should change the gears from 3.31 to 3.73. # > The GMC Jimmy and 3/4t truck both had 3.73s, the Jimmy came # > with 31x10.5 tires. # > # > At highway speeds with the trailer in tow it seems to want to # > downshift... in traffic it's not exactly fast off the line and # > again at around 45 to 50 seems to like to drop a gear to accelerate. # > # > I'm thinking that 3.31s might be too steep... it has the 700R4 # > # > can't find the gear ratios right now... think it's about a .74 OD though # > # > engine info: # > Typical Specifications # > Displacement: 6.2L (379ci) # > Bore & Stroke: 3.98x3.80 inches # > HP -at- RPM: 135 -at- 3600 # > Torque -at- RPM: 240 -at- 2000 # > Compression Ratio: 21.3 # > Injection: Indirect, Mechanical, Stanadyne Rotary DB-2 # > Aspiration: Natural # > Max EGT: 1100max/900 sustained* # > # > from: http://www.oramagazine.com/archive/2004/08-august/0103-tech-finesse-2.asp # > # > # > so if max torque is at 2000 rpm I should shoot for that at 55-60 mph, right??? # ------------------------------ Date: Mon, 12 May 2008 15:43:46 -0700 (PDT) From: john Subject: fsj: gears just realized that my electrac is for 3.92 and UP... :( won't work with my 3.31s ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- ------------------------------ Date: Mon, 12 May 2008 15:34:48 -0700 From: Kevin Subject: Re: fsj: gears Not for dana 44s. The carrier is 4.10 and higher numerically, or 3.92 and lower numerically. If you have to use that electrac, guess you're lifting it and running 33s. :) On Mon, May 12, 2008 at 03:43:46PM -0700, john wrote: > just realized that my electrac is for 3.92 and UP... :( > > won't work with my 3.31s ------------------------------ Date: Mon, 12 May 2008 16:08:30 -0700 (PDT) From: john Subject: Re: fsj: gears according to Randy's Ring & Pinion, the 6.2L Diesel power band is 1800 to 2800 rpm with 3.31s: with 235's at 1800rpm and .70 overdrive - 66 mph, at 2800 104 mph :) with 31's at 1800rpm and .70 overdrive - 70 mph, at 2800 110 mph with 4.10s: with 235's at 1800rpm and .70 overdrive - 54 mph, at 2800 83 mph with 31's at 1800rpm and .70 overdrive - 57 mph, at 2800 88 mph with 3.73s: with 235's at 1800rpm and .70 overdrive - 59 mph, at 2800 92 mph with 31's at 1800rpm and .70 overdrive - 63 mph, at 2800 97 mph - ----- I'm thinking that 4.10s might work based on this new info... have a set of R&P down in Centralia for a D44 front axle... maybe I could run down Wednesday and get it and have it installed on Thursday... john ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- On Mon, 12 May 2008, Kevin wrote: # Not for dana 44s. The carrier is 4.10 and higher numerically, or 3.92 and lower # numerically. # # If you have to use that electrac, guess you're lifting it and running 33s. :) # # On Mon, May 12, 2008 at 03:43:46PM -0700, john wrote: # > just realized that my electrac is for 3.92 and UP... :( # > # > won't work with my 3.31s # ------------------------------ Date: Mon, 12 May 2008 16:32:53 -0700 (PDT) From: john Subject: Re: fsj: gears unless I go with 4.10s I can't use my electrac... :( I can do it with a 3.92... but those gears cost more. I could try to get down to Centralia to get my front R&P 4.10s from Curtis, but he nevers answers email or his phone, would hate to drive 200+ miles at $4.56/gallon to find out he's not home... :( looking at the specs the 3.31s aren't all that bad... if I'm not in overdrive... I'm thinking that I may just fix my pinion bearing, rear seal and front bearings and leave the ratios alone... otherwise this project could easily escalate into an easy grand... unless of course that ratio change would equal better mileage in commuting... 4 tank average so far is upper 16's... about 17 if you round up... http://wagoneers.com/FSJ/Omega/TECH-INFO/6.2L-Diesel-ratios-GW.pdf (the excel file is in the directory if you want to tweak the numbers...) thoughts? I'm planning on taking it into a shop on Thursday... Randy's has the parts on hand... I suppose I could buy the front R&P and return the other set... if they're not rusty or out of the original packaging... john ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- On Mon, 12 May 2008, Kevin wrote: # Well, after you did the math, I'd probably be looking at 3.73s or 3.55s. # Then again, I have trucks to pull trailers bigger than a boat, and I spend most # of my time on the highway. # # On Mon, May 12, 2008 at 04:08:30PM -0700, john wrote: # > according to Randy's Ring & Pinion, the 6.2L Diesel # > power band is 1800 to 2800 rpm # > # > with 3.31s: # > with 235's at 1800rpm and .70 overdrive - 66 mph, at 2800 104 mph :) # > with 31's at 1800rpm and .70 overdrive - 70 mph, at 2800 110 mph # > # > with 4.10s: # > with 235's at 1800rpm and .70 overdrive - 54 mph, at 2800 83 mph # > with 31's at 1800rpm and .70 overdrive - 57 mph, at 2800 88 mph # > # > with 3.73s: # > with 235's at 1800rpm and .70 overdrive - 59 mph, at 2800 92 mph # > with 31's at 1800rpm and .70 overdrive - 63 mph, at 2800 97 mph # > # > ----- # > # > I'm thinking that 4.10s might work based on this new info... have # > a set of R&P down in Centralia for a D44 front axle... maybe I # > could run down Wednesday and get it and have it installed on Thursday... # ------------------------------ Date: Mon, 12 May 2008 16:55:14 -0700 (PDT) From: john Subject: fsj: engine mount upgrade need to help isolate vibration: this is what I think I have: http://www.novak-adapt.com/catalog/engine_mounts/mmx-wc1.htm 6.2L Diesel in a '91 Grand wagoneer ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- ------------------------------ Date: Mon, 12 May 2008 18:47:45 -0700 (PDT) From: john Subject: fsj: Re: Wagoneer? this is the first jerarri... there was a 2nd. links to both to follow. :) john ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- On Mon, 12 May 2008, chuck goolsbee wrote: # http://www.autoblog.com/2008/05/12/ebay-find-of-the-day-the-jerrari/ # # # ------------------------------ Date: Mon, 12 May 2008 21:38:53 -0500 From: Zee Man Subject: fsj: homemade fuel? Btw If anyone cares,, I have some experience with the Good old SMARTCAR. I rented a few while visiting Sicily ... They are a neat little car, but i think i would rather drive a Mini Cooper S.. The SMART just isnt right for America yet..Unless of course its only to commute to work and back and pick up one child and a bag of groceries.... For any other purpose I just dont think so... http://www.geocities.com/z_man401/smartcar.htm Bob 78 Cherokee Chief _________________________________________________________________ Stay in touch when you're away with Windows Live Messenger. http://www.windowslive.com/messenger/overview.html?ocid=TXT_TAGLM_WL_Refresh_ messenger_052008 ------------------------------ Date: Mon, 12 May 2008 20:33:27 -0700 (PDT) From: john Subject: fsj: smart cars and project progress On Mon, 12 May 2008, Zee Man wrote: # Btw If anyone cares,, # I have some experience with the Good old SMARTCAR. I rented a few while # visiting Sicily ... They are a neat little car, but i think i would rather # drive a Mini Cooper S.. The SMART just isnt right for America yet..Unless of # course its only to commute to work and back and pick up one child and a bag of # groceries.... For any other purpose I just dont think so... # # http://www.geocities.com/z_man401/smartcar.htm # # Bob # 78 Cherokee Chief # when they offer the Diesel SmartCar version I will be interested... have you seen the crash videos of these things on the internet? they are amazing little cars... the Diesel version should get incredible mileage... something like 79mpg or better... I'm looking for one of these to carry behind Omega instead of a spare tire... ;) BTW, I picked up the 4.10 gears for my '91 Grand Wagoneer with the 6.2L Diesel... with the power band between 1,800 and 2,800 rpm it made sense to go with 4.10s over the 3.31s. The 4.10s will work with either 235s or 31s. Randys ring and pinion and an engineering buddy both agree I'll get better mileage setup this way. I had no idea how much I was lugging this engine... but thinking back to cruising on I-5 at 70mph I was having trouble on slight grades... had to downshift! looking at the numbers I understand why... also understand why at 90mph this thing seemed peppier than off the line. http://wagoneers.com/FSJ/Omega/TECH-INFO/6.2L-Diesel-ratios-GW.pdf my new radio arrived tonight too... have the a/c unit to install... it's coming together.... :) Thursday Omega gets re-geared... :) I'm sure the 0 to 60 time will be better than 19.75 seconds... later, john ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- ------------------------------ Date: Mon, 12 May 2008 20:36:15 -0700 (PDT) From: john Subject: Re: fsj: Re: Wagoneer? http://wagoneers.com/FSJ/rigs/Jerrari-1/ALL.html http://wagoneers.com/FSJ/rigs/TheJerrari/ ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- On Mon, 12 May 2008, john wrote: # this is the first jerarri... there was a 2nd. # links to both to follow. :) # # john # # ----- # ---------------------------------------------------------------------- # Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold # http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** # ---------------------------------------------------------------------- # # # On Mon, 12 May 2008, chuck goolsbee wrote: # # # http://www.autoblog.com/2008/05/12/ebay-find-of-the-day-the-jerrari/ # # # # # # # ------------------------------ Date: Mon, 12 May 2008 23:21:17 -0700 (PDT) From: john Subject: fsj: Diesel gearing... 3.31-->4.10 I purchased the 4.10s today... the math and an engineer friend confirmed that's the best arrangement... with 3.31s: tach mph mph mph mph 235s 31s 235od 31od 2000 51.9 54.6 74.16 77.94 with 4.10s: tach mph mph mph mph 235s 31s 235od 31od 2000 41.911 44.044 59.87 62.92 with 3.31's, 31's and overdrive at 60mph I was turning 1,550 rpm with 4.10's, 31's and overdrive at 60mph I will be turning 1,900 rpm not sure if you'll be able to see the details below, if not there is a link to the pdf and excel: http://wagoneers.com/FSJ/Omega/TECH-INFO/Omega-3.31-4.10s.pdf http://wagoneers.com/FSJ/Omega/TECH-INFO/Omega-3.31-4.10s.xls 700R4 has a .70 OD - powerband on 6.2L Diesel is 1,800 - 2,800 rpm 3.31 gears - OMEGA current 4.10 gears - proposed (d44) 235's 31" tires 235's w/OD 31's/0d 235's 31" tires 235's w/OD 31's/0d Gears: 3.31 3.31 3.31 3.31 Gears: 4.10 4.10 4.10 4.10 Tires: 28.88 30.35 28.88 30.35 Tires: 28.88 30.35 28.88 30.35 tach mph mph mph mph tach mph mph mph mph 600 15.6 16.4 22.25 23.38 600 12.573 13.213 17.96 18.88 700 18.2 19.1 25.96 27.28 700 14.669 15.416 20.96 22.02 800 20.8 21.8 29.67 31.18 800 16.764 17.618 23.95 25.17 900 23.4 24.6 33.37 35.07 900 18.860 19.820 26.94 28.31 1000 26.0 27.3 37.08 38.97 1000 20.956 22.022 29.94 31.46 1050 27.3 28.6 38.94 40.92 1050 22.003 23.123 31.43 33.03 1100 28.6 30.0 40.79 42.87 1100 23.051 24.224 32.93 34.61 1150 29.9 31.4 42.64 44.81 1150 24.099 25.326 34.43 36.18 1200 31.1 32.7 44.50 46.76 1200 25.147 26.427 35.92 37.75 1250 32.4 34.1 46.35 48.71 1250 26.194 27.528 37.42 39.33 1300 33.7 35.5 48.21 50.66 1300 27.242 28.629 38.92 40.90 1350 35.0 36.8 50.06 52.61 1350 28.290 29.730 40.41 42.47 1400 36.3 38.2 51.91 54.56 1400 29.338 30.831 41.91 44.04 1450 37.6 39.6 53.77 56.50 1450 30.386 31.932 43.41 45.62 1500 38.9 40.9 55.62 58.45 1500 31.433 33.033 44.90 47.19 1550 40.2 42.3 57.48 60.40 1550 32.481 34.134 46.40 48.76 1600 41.5 43.6 59.33 62.35 1600 33.529 35.236 47.90 50.34 1650 42.8 45.0 61.18 64.30 1650 34.577 36.337 49.40 51.91 1700 44.1 46.4 63.04 66.25 1700 35.624 37.438 50.89 53.48 1750 45.4 47.7 64.89 68.20 1750 36.672 38.539 52.39 55.06 1800 46.7 49.1 66.75 70.14 1800 37.720 39.640 53.89 56.63 1850 48.0 50.5 68.60 72.09 1850 38.768 40.741 55.38 58.20 1900 49.3 51.8 70.45 74.04 1900 39.816 41.842 56.88 59.77 1950 50.6 53.2 72.31 75.99 1950 40.863 42.943 58.38 61.35 2000 51.9 54.6 74.16 77.94 2000 41.911 44.044 59.87 62.92 2050 53.2 55.9 76.02 79.89 2050 42.959 45.146 61.37 64.49 2100 54.5 57.3 77.87 81.83 2100 44.007 46.247 62.87 66.07 2150 55.8 58.6 79.73 83.78 2150 45.054 47.348 64.36 67.64 2200 57.1 60.0 81.58 85.73 2200 46.102 48.449 65.86 69.21 2250 58.4 61.4 83.43 87.68 2250 47.150 49.550 67.36 70.79 2300 59.7 62.7 85.29 89.63 2300 48.198 50.651 68.85 72.36 2350 61.0 64.1 87.14 91.58 2350 49.246 51.752 70.35 73.93 2400 62.3 65.5 89.00 93.53 2400 50.293 52.853 71.85 75.50 2450 63.6 66.8 90.85 95.47 2450 51.341 53.954 73.34 77.08 2500 64.9 68.2 92.70 97.42 2500 52.389 55.056 74.84 78.65 2550 66.2 69.6 94.56 99.37 2550 53.437 56.157 76.34 80.22 2600 67.5 70.9 96.41 101.32 2600 54.484 57.258 77.83 81.80 2650 68.8 72.3 98.27 103.27 2650 55.532 58.359 79.33 83.37 2700 70.1 73.7 100.12 105.22 2700 56.580 59.460 80.83 84.94 2750 71.4 75.0 101.97 107.16 2750 57.628 60.561 82.33 86.52 2800 72.7 76.4 103.83 109.11 2800 58.676 61.662 83.82 88.09 ----- - ---------------------------------------------------------------------- Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** - ---------------------------------------------------------------------- On Mon, 12 May 2008, Eric Ditwiler wrote: # and you have 3.31's? yes, currently... # My guess is that you are overgeared. What speed is 2000 rpm with the 3.31s? about 78 mph. ;) # ---------------------------------------------------------------------- # On Mon, 12 May 2008, Eric Ditwiler wrote: # # # well you are going to get your best mileage at 2000 RPM as that is the peak # # of your torque curve. # # # # I'd shoot for being able to go 55-60 at 2000 rpm unless this is some sort of # # tug boat # # # # Eric Ditwiler # # Director, Academic Operations # # Harvey Mudd College # # 909-607-3134 # # eric_ditwiler-at-hmc.edu # # # # > # # >I'm wondering if I should change the gears from 3.31 to 3.73. # # >The GMC Jimmy and 3/4t truck both had 3.73s, the Jimmy came # # >with 31x10.5 tires. # # > # # >At highway speeds with the trailer in tow it seems to want to # # >downshift... in traffic it's not exactly fast off the line and # # >again at around 45 to 50 seems to like to drop a gear to accelerate. # # > # # >I'm thinking that 3.31s might be too steep... it has the 700R4 # # > # # >can't find the gear ratios right now... think it's about a .74 OD though # # > # # >engine info: # # >Typical Specifications # # >Displacement: 6.2L (379ci) # # >Bore & Stroke: 3.98x3.80 inches # # >HP -at- RPM: 135 -at- 3600 # # >Torque -at- RPM: 240 -at- 2000 # # >Compression Ratio: 21.3 # # >Injection: Indirect, Mechanical, Stanadyne Rotary DB-2 # # >Aspiration: Natural # # >Max EGT: 1100max/900 sustained* # # > # # > from: # # > http://www.oramagazine.com/archive/2004/08-august/0103-tech-finesse-2.asp # # > # # > # # >so if max torque is at 2000 rpm I should shoot for that at 55-60 mph, # # >right??? # # > # # >john # # > # # > ----- # # >---------------------------------------------------------------------- # # > Snohomish, Washington -o|||||o- where Jeeps don't rust, they mold # # > http://wagoneers.com ** http://wagoneers.com/FSJ/Omega/ ** # # >---------------------------------------------------------------------- # # # ------------------------------ End of fsj-digest V1 #3075 **************************