redcamaro83

think its possible to have a 450-500 hp super charged tpi 350 that gets 18 mpg or better(hwy). hopefully better than that. a better question being would it pass emissions in IL? or period.

Super charged people with 4-600hp what do you use for a rear end? 9 or 12 bolt. how does it hook up on street if at all....

------------------
"Work like you don't need the money, love like you've never been hurt, and dance like you do when nobody's watching."

QwkTrip

iTrader: (22)

Well, since nobody has answered yet I'll chime in about my '94 LT-1 Vette. I had a well built motor with a stock cam and stock computer with a Vortech V1 S-trim at 12 psi. It made 500Hp on pump gas and got 26 mpg in sixth gear on the freeway. It passed emissions with no trouble even with the CATs completely gutted. There's quite a difference in manifold and head design between TPI and LT-1 so it's going to be a heck of a lot harder for you to make the same Hp. But with the proper mods you can easily get there and more.

askulte

Yes. I've gotten 24 mpg from the Z28tt during the drive from MA to NC. Granted, it's turbos, but the supercharger shouldn't be much worse. It's an stock L98 with the T56 in sixth gear and a Super Ram intake. Best trap speed was 114 at 5psi, so its somewhere around 450 hp I think. Fuel economy shouldn't change much if you can keep your foot out of it.

Rear ends - if you'll be drag racing, the 9 bolt/10 bolt will eventually break and you'll need to upgrade to a 9" or 12 bolt. With the stock torque arm, it would spin through 1st and second. With the much shorter Herb Adams torque arm, I actually get traction now. Run drag radials or Kumhos if you always want traction


------------------
Andris Skulte
Skulte Performance Designs
Z28tt-89 IROC T56 DFI Twin Turbo
http://www.skulte.com



[This message has been edited by askulte (edited July 25, 2001).]

Willie

iTrader: (1)

My goal from the very beginning was to have a 12-second emissions-legal, daily-driven 305.

Not only have I met my goal, but my best is a 12.04 @ 116+ mph. I was getting over 19 mpg in town until I installed a 3800 flash stall torque converter. Today, I get about 17 mpg.

Here in Arizona, I have to go through a yearly emissions check which includes a visual inspection and a tailpipe sniffer (at idle and load). I can post my results of the sniffer test if requested.

------------------
Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig) with 50-hp nitrous: 12.043 @ 112.86 mph.
ATI D1SC (10-psig): 12.056 @ 116.62 mph.
All stats are altitude corrected for 3,100 feet using NHRA's Altitude Correction Table.

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.

[This message has been edited by Willie (edited July 25, 2001).]

JAYDUBB

A T.P.I.S. Mini Ram and a pair of AFR 195cc heads will take care of that problem.

QwkTrip

iTrader: (22)

Yes, it will.

redcamaro83

ok great now i know it's possible.
mini ram? TPIS hmmm i haven't gotten good news abou them in a while. AFR heads sound good. ummm where can i get info on afr. About how much compression would be needed before i added about 9psi of boost? 12 bolts are an arm and a leg but i'll look anyone know where to get either a 12bolt or 9 inch.

------------------
"Work like you don't need the money, love like you've never been hurt, and dance like you do when nobody's watching."

maniacc

Redcamaro83,

Check out these sites

http://www.airflowresearch.com/main.html
http://www.moserengineering.com/
http://www.martelbros.com/strange/strange.htm

These site might help you out on your quest for info..

later
larry


------------------
MÅN¡ÅÇ ©
88 IROC 5.7 TPI
ATI procharger D1sc 10#'s boost, edelbrock TES, complete MSD ignition, Borla cat-back, KB subframe connectors, accel 24# injectors...and a few other go fast goodies
http://maniac.megamania.com