What kind of a gas milage loss will I see when I install a Vigi. 2800 stall and a Trans Go on a mostly stock car with 3.23 gears? Thanks

 

No one has input on this?

 

I'm not sure if it is any different on LT1 vs LS1 but I can tell you a 2800 stall on a LS1 would be very minimal for MPG loss. A few in the city and highway would stay the same as the converter locks up at 35mph I believe and the rpm's drop to normal.

Maybe someone with a LT1 & 2800 stall can chime in to confirm this but if it's like the LS1 at all then your not gonna see no diffence in hwy MPG and just a small decrease in city mpg.

Get the stall. Best mod any A4 car can do. Mine's on it's way and I can not wait to feel the difference over this crap stock 1800 stall.

Good Luck

 

I think you'll see very little change. My car only dropped a couple MPG.

 

I know im going to get blasted for this But: I used to have a Yank 2800 stall -a couple of years ago--Kept it three months, wasnt for me. Now im 47 so my needs maybe different then yours, but all i know is if my car had about a quarter tank of gas, i needed to get gas even though i only had to drive 10 miles flat to work with only a couple of lights. It only stands to reason that it takes more pedal --and gas-- to get going---For me when i got my stock tc back i felt like i gain 50 hp--car moved when i gave it the gas--Have fun with yours, their not for me Dwayne

 

Depends how you drive. If it's mostly stop and go there will be a big drop. If you cruise a lot with the lock-up engaged, you will see a much smaller change. Not really much like your setup, but FWIW I went from 12-15mpg in suburban driving to 7-8mpg when I went from an M6 to a TH400 with a 4,200 stall (non lock-up).

Rich Krause

 

7mpg

 

75% highway driving and 25% city driving I got 22mph in my Camaro- HOTcam, ported heads, 2800 midwest etc. I agree with Rich though, the more stop and go driving the more drop in gas mileage you will see. It takes quite a bit more pedal to get the Camaro moving than it did before the converter. I think you can get the PCM programmed to use RPM for shiftpoints and not road speed, but I could be wrong. If that is possible I would think it would maybe help you out a little in the MPG department.

Edit: Either set the PCM to shift by RPM or make your part throttle shift points at slower road speed.

 

They're no fun in the city. With an open exhaust, everyone thinks you're trying to race. I dropped a couple mpg with my 3200 edge but I still get about 17-18 with an exhaust leak.