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05-12-2005, 02:10 PM
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#1 |
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Senior Member
Join Date: Aug 2002
Location: Valley Center KS
Posts: 3,525
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TPI fuel mileage
I'm in the middle of swapping in a 350 TPI with a 700r4 tranny into my truck. I think it will be a great combo for a truck in many aspects.
Does anyone else have this combo. What kind of fuel mileage are you getting? I'm hoping for 20mpg highway. Thanks |
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05-12-2005, 03:18 PM
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#2 |
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Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Depending on your rear ratio, 20 isn't an impossible milage rating to get, esspecially with EFI of any sort
__________________
1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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05-12-2005, 03:55 PM
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#3 |
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my gas saver
Join Date: Sep 2003
Location: Clarksville, TN
Posts: 2,046
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i had an 87 camaro with that set up. of course it was a lighter, more aerodynamic car but it would get around 18-21MPG.
you should try to run around a 373 in your truck. i think that would be just about right.
__________________
85' SWB, 4.3/TH350, getting ready for paint 84`SWB, 462ci./TH400, cowl hood, 15" billet spec., flows, blazer buckets/console, flat black 71`SWB, project ebay feedback |
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05-12-2005, 04:57 PM
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#4 |
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Senior Member
Join Date: Aug 2002
Location: Valley Center KS
Posts: 3,525
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I have 3.08 gears
and the camaros weigh aroun 3700 lbs, and my truck weighs around 4000, so that's not much of an issue....but with the aerodynamics of a brick. |
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05-12-2005, 05:32 PM
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#5 |
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my gas saver
Join Date: Sep 2003
Location: Clarksville, TN
Posts: 2,046
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i wouldn't run that gear but that is just my opinion, others may agree or disagree.
__________________
85' SWB, 4.3/TH350, getting ready for paint 84`SWB, 462ci./TH400, cowl hood, 15" billet spec., flows, blazer buckets/console, flat black 71`SWB, project ebay feedback |
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05-12-2005, 08:45 PM
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#6 |
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Registered User
Join Date: Feb 2002
Location: Vacaville, CA
Posts: 2,746
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^ I agree, when that thing shifts into OD your final ratio will be about 2.10.
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 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI |
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05-12-2005, 10:16 PM
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#7 |
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Senior Member
Join Date: Jun 2000
Location: yucaipa ca
Posts: 580
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i think a 3:42 gear would be better. i am running a 5 speed with 3:73 and only get 15
Last edited by dmec; 05-12-2005 at 10:17 PM. |
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05-12-2005, 11:59 PM
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#8 |
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Senior Member
Join Date: Aug 2002
Location: Valley Center KS
Posts: 3,525
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I know I'll be running a very high gear ratio...but..
for example, my car has 3.42 gears and 50% overdrive (1.71 final drive ratio) and some f-bodies have 2.73 gears with 70%ish overdrive. Granted, my example is with an LS1 car that has more power, but the TPI engines make a lot of torque at low rpms, so I think it will be ok. I will see how it runs, and if it needs gears I may change them, or get a different torque converter. |
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05-13-2005, 12:27 AM
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#9 |
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Registered User
Join Date: Apr 2004
Location: Calgary, Alberta,Canada
Posts: 1,595
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I'm in the process of doing a 383/700R4. Should have the motor installed in the next few weeks. I'm thinking of running a gear in the mid 3:?? ratio. Fuel economy will be a major consideration.
__________________
I know what your thinking.......I have ESPN.  Sometimes it's easier to do things the hard way.  Fesler Built 1968 Chevy C10....Must resist the urge to mess with it!! 
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