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W-Body for Life!
i <3 Highway fuel.
somehow, i managed to pull 38.1MPG out of the 90GP(LH0/4T60, 3.33FDR) once on a ~220 mile trip.
highway spark is a MUST when high fuel is enabled, to make up for the lower flame speed at leaner AFRs.
1995 Monte Carlo LS 3100, 4T60E,
OBD1 Conversion...for now, future plans include a 3900, T04E-46 (Knock-Off) turbo (For the 3100, ~T61 for the 3900), and a F40.
Latest nAst1 files here!
Need a wiring diagram for any GM car or truck from 82-06(and 07-08 cars)?
PM me!
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07-14-2011 12:23 PM
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Captain of the Failboat
I saw 40 going through Texas when my car was all stock. Gearing is HUGE! The 3 speed in my cavalier is killing it for me. I can't even get 30.
Ben
60DegreeV6.com
WOT-Tech.com
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The Situation
Originally Posted by
SappySE107
On a grand am 3400, upgrading to 3500 heads and headers plus tuning showed 5-6 mpg increase.
nice increase in mpg. wonder what my car get's for city/highway mpg's. i don't drive it enough on a regular basis to get real numbers.
99 Grand Am GT
3400/3500 -Solid trans mount--TCE 65mm T-body---85mm LS2 maf---1 1/4' TCE intake spacers with 3400 upper--SLP Catback with flowmaster 80--TOG headers
Modded 3400 lifters with LT1 springs---Comp Cams 26986 Springs
1357 cam 227 233 .050 dur 515 515 lift 112 lsa
15.232@88.85mph on stock 3400---New time to come
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Because stock sucks...
Originally Posted by
SappySE107
This was with my old 3.1 MPFI grand prix, and it was comparing multiple tanks of gas with varied driving habits each time. Also compared at the drag strip for the power and ran the same times back to back to back to back.
You forgot to mention that number haunted you no matter what strip it was at, too, lol.
-60v6's 2nd Jon M.
91 Black Lumina Z34-5 speed
92 Black Lumina Z34 5 speed
94 Red Ford Ranger 2WD-5 speed
Originally Posted by
TGP37
Step up to a man trans, step up to a 5-speed.
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Originally Posted by
onefastV6
I will be sure to post how my 3500 with the MPG cam and TOG headers works out... hoping to slap it back together yet this summer.
So i guess i know why you sold me your old cam then??
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Originally Posted by
robert 1980
So i guess i know why you sold me your old cam then??
I had two projects going for the longest time, one was going to be a performance build and the other an MPG build. I sold the car that was going to be the MPG mule and was going to stick with the performance build. Then I was having issues with my daily driver (dodge neon) and pretty much sold everything off to fund a new vehicle with the plan to put the grand am that is torn down in the garage back together with a stock 3500. With the way the used car market is I fixed my daily driver and I found the TOG headers for $350 and got the MPG Cam from Ben. Not enough time or money to do everything I want to, so I figure I might as well stick with the cheaper route and get a little more performance with a little better fuel economy.
If that was your guess then you are correct 
Last edited by onefastV6; 07-15-2011 at 01:01 AM.
2001 Grand Am GT
2000 Grand Am GT
"The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power." ~John Lingenfelter
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6 > 1
10-12 city and 30-35 highway with my 3500 in the old Z24 (5 speed, 3.61 FDR)... highway spark was a little past 40 degrees, LCM was enabled but the AFR's hovered in the low 16's during it's on-time. If i had a little less cam the city MPG would be much better.
1989 Camaro RS; Cammed 3500 swap, 45mm ITB's, Street/Strip Kitted 700R4, 3500 stall, Megashifter, 3.73 posi, EQ- LT headers, 2.25" True Duals, X pipe, etc...
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