Forced Induction Superchargers | Turbochargers | Intercoolers

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Old 09-27-2009, 09:40 PM
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heres a stupid question, what kind of gas mileage do you think i can expect to get from a fully forged 383 lt1, running 12lbs with a d1sc thru twin intercoolers?

reason i ask is my formy was just totaled and i found a trans am with said mods, but i drive close to 50 city miles a day, and just dont know if this car will even be an option strictly because of fuel economy. i got 13 in my old h/c/i lt1, how much worse am i looking at boosted?

thanks in advance guys.
Old 09-27-2009, 09:51 PM
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if u can keep your foot out of it stop light to stop light i say not far off your other car
Old 09-27-2009, 10:01 PM
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NICE!! thats what i wanted to hear man. to be honest, in vegas, you really cant lay into too often, traffic is the worst. thats good to hear, because if it was say 10mpg or lower, the car would probably be a no go, but if i can squeeze say 12, ill probably be all over it. thanks man
Old 09-27-2009, 10:03 PM
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also, forgot to mention this is thru A4 and 3.73s, dont know the cam specs or stall at the moment...
Old 09-27-2009, 10:31 PM
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i'm getting about 23-25mpg. highway at 80mph in 6th, a needle with below 2k.rpm's w/3.42 gears. 385cu.in.LT1 T67 rear-mount turbo...

i guess that's pretty good on 91oct..... ? is it..?

Last edited by hawk584; 09-27-2009 at 11:25 PM.
Old 09-27-2009, 10:35 PM
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HAHAHA, jesus christ, freakin turbo lol... hey you know some fi guys in vegas right? do you know of the car im talking about? its a purple 95 trans am. apparently it was built circa 05. i think he was an lvfbody guy, if you know anything lemme know, thanks!
Old 09-27-2009, 10:38 PM
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i know some of the lvfbody guys, but i haven't been able to get down and hang out with them in awhile & the car doesn't ring a bell
Old 09-27-2009, 10:42 PM
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ahhh i see man. well, some lady just pulled across traffic in front of me and i slammed into the side of her, so now im in the market again heres the car btw http://s558.photobucket.com/albums/s...t=MOV00459.flv
Old 09-27-2009, 11:13 PM
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the only way i would remember that car is if it was at one of the two invations i came down for
Old 09-29-2009, 03:51 PM
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FWIW to those who still are interested in the first question, I get 13 MPG city driving, and as good as 21 MPG on the highway. Average about 14-15 MPG.

If my foots been in it a bit during the tank of gas, I've seen as bad as 8 MPG before

This is all in my D1SC, 15#'s of boost, FMIC, pump gas.
Old 09-29-2009, 04:03 PM
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nice! thats better than i ever got with my car. just spoke with the owner yesterday, he said around the same, 18-20 highway, which it will probably never see, but i will be more than content with 13mpg. thanks for the input!!




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