redbanditz28

As i wrote in a similar post, i am looking into buying a completely built forged engine so that i can use the rear mount turbo from sts on it. I am looking to keep it street legal and friendly. My goals are to hit the low 10's, maybe even the high 9's. I mean people accomplished that on a stock sized LS1 engine, so i am guessing its doable with a 370. I mean iron blocks are the right way to go with forced induction right? a 408 just seems like it would be to much cubic inches for good drivability or gas mileage right?

Frost

iTrader: (45)

I don't know of an F-Body that has seen 10.50s yet with an STS kit.... doesn't mean you cant be the guy, just that you will have to forge the way on your own. You're gonna hafta hang a big hairdyer under the back of your car for that kind of ET and that size engine. It's doable, just saying it's gonna take some fabricaiton rather than being an out of the box install...

quicksilverado

iTrader: (8)

I went 11.35 @ 118 in a 4500 lb truck. 370, 218/222 cam, gt-67 and 12 psi. No I/C, but I was spraying meth. I don't see why an f-body in the 3600 lb range can't run a 10.5

00turboT/A

iTrader: (61)

Dave thats because your truck is awsome. You drive it to work everyday and you never even know it has a turbo on it until you get on it and that crazy *** wastegate sound comes in.

98Z28MASS

iTrader: (6)

I say go forged 370 iron block and a procharger ds1c. You would easily see 10's with the right suspension, maybe even 9's. There are a couple guys with forged 346's running low 10's high 9's on a ds1c. STS turbos are nice and work well ont he street but for low ET's they arent the best setup. If you want to go turbo go with a single turbo front mount kit.

SSilverSSurfer

iTrader: (8)

^^^^prochargers are the shizzit^^^^but i dont see why you wouldnt get 10's out of a 370 with a FM or RM turbo

orange88

iTrader: (1)

cuz it take 11 seconds to fully spool




sorry i thought i was funny

redbanditz28

Well you can bash the rear mount, but at least i know i will pass NJ inspection with it since it has a carb number. I mean i literally checked with the NJ Auto inspection specialist and he even told me most of all front mount turbos don't pass. I don't really trust a supercharger. Too many moving parts, and i don't like the idea of a belt braking or what ever happens to most belts on a supercharger. I like the rear mount for individuality reasons. To say that i can be the first unofficial or official 9 second STS turbo LS1 F-body in NJ would be cool. Plus i was thinking of getting it tuned by cartek and they really seem to believe its possible for me to reach my goal. Believe me, if i lived in any other state other than NJ, i would good with the GMR twin turbo, but i know for a few facts that their system won't pass in NJ.

mongse

iTrader: (2)

Then you won't like exhaust leaks that make the car run like crap, charge pipes blowing off or all the extra tubing under the car. I've used them all and there isn't a power adder that doesn't have a downside.

I ran a Procharger for just over 3 years and never threw a belt. If the kit is installed correctly and you're not trying to spin the setup outside of it's intended range, you shouldn't throw belts.

Slowhawk

iTrader: (12)

Bigger the motor the better.

A GTO has already run 9's with a built STS,so it can be done just nobody has really tried in a F-body yet.

allngn_c5

iTrader: (3)

Good luck with your project. I myself prefer N/A, but only for now. Supercharged 408 coming down the road.

WAHUSKER

iTrader: (4)

I'd guess a T-70 on a 370 @ 15 psi or a D-1SC on a 408 @ 12 psi would get you a nice streetable low 10 sec car. Maybe hi 9s if you worked on it. I figure my setup will hit low 10s next year with a D series s/c, and my car weighs 4k lbs!!!

SSilverSSurfer

iTrader: (8)

that is funny...lol....i like the set up i just choose not ot go that route...D1 ftw...

ChicagoTransAm

Seems everyone says big cubes are better, but it seems the fastest centrifigal blown cars around are in the mid 350 cube range! Im getting my D1 tommorrow hopefully, and will be strapping it to a 370. We'll see how the D1 likes the 370.

OUTLAWZ RACING

iTrader: (9)

I got greedy and went to a 422. I didnet even run the 402 I had, But a 370 and a gt70 or 76 with a good suspension set up should get you there. A guy i Know longerang4u went really low 11 on a stock block and 317 heads no meth with a intercooler. Im not sure of his boost or suspension set up, also he had the 67 upgrade. I have yet to leave this country to finish my car but I hope to see mid 10s. Once I hit that I will start with the 06 zo6( not orderd yet ) But will be an early xmas gift for me

SSilverSSurfer

iTrader: (8)

sounds like fun....keep us updatedo n your set up id like to know how that turns out

mdhmi

iTrader: (1)

I'd prefer the all bore 370 for a turbo app, but certainly either will work fine. I'm also not sold on iron blocks over aluminum for forced induction combos.

I'm in the process of having a forged stock cube LS6 built at the moment. I decided on the LS6 over iron or aluminum 402 or 408 as I felt the added weight on the nose of the car wasn't justified given the power level I plan to run.

Good luck on your buildup.

Mark

longrange4u

iTrader: (2)

Your gonna have to race me there... I have been having this debate for a while. I ran an 11.01 on a shitty track with 98% humidity with a stock block and 6.0L heads... cut a 1.6 60'....

Of course I also blew my head gasket... Damn the luck.

Now my debate is much the same... do I want to go 400+ CI or 370... What RPM the engine can spool to is a big factor as it was so kindly put... my rearmount dosent spool till 3k. I have a plan... but I am going to have to keep it under wraps for a little while... ( I do want to be able to say I am the fastest single rearmount in the US )

There is no F-Body rearmount that I know of that is below 10.7.... not saying there isnt one, just havent heard about it. I want to shoot for mid 9's with my STS style setup. It aint cheap and I am looking for a shop sponsor to help a little.... Billy at TRT Performance will most likely be the guy....

Now I gotta produce the funds... and that is not easy.

ChicagoTransAm

Pro stock john ran a 348
KP ran a 346, and rebuilt it to again a 347
I know a guy with an Fseries blower on a 1st gen SBC thats well into the singe digits

But i dont know anyone doing single digits on anything bigger with a centrifigal blower. Could be no ones just built the right setup for whatever reason on bigger cubes, but just seems 346-355 is the magic cube size that the flying people are running, dont ask me why. I tried finding out on a post in here and everyone said they built a 346 casue it was cheaper, or they had the parts laying around or whatever reason. Still cant find anyone going single digits with big cubes and a D1.

This is big bad blackss posting on my buddies account by the way, cant get on my name on his computer for some reason?

ChicagoTransAm

Also just looked at the boosted list, for 05, only 3 of the top 10 cars were above 370 cubes. And seems all but 3 setups on the 06 list are 370 cubes or less.

These are the things that make me go HUMMMMM??? But no one can seem to explain to my why this is. Everyone seems to be on the bigger cubes is better bandwagon though???