plans changed, new car an everything, am i gonna run into problems with a stock TPI 5.7 formula with boosting/revving? i was hoping to hih a high redline an 15-20 PSI normally, will TPI en up biting me in the *** on it? i don thave too much of an understanding of my options, are TPI/TBI the only way to go? or can i get SFI without redoing the whole thing? sorry if this is in the wrong place.

 

How high are you talking about? The TPI intake will stand the boost, but the pistons, rods, and crank wont stand the boost or the high revving. They usually start to fail, valve float and stuff, over 6000. You'll need forged parts and other drivetrain enhancements.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

dont worry about high revving a stock motor the boost will do it's job doesn't matter how fast you spin the engine it maatters what the supercharger or turbocharger's operating range will be with a standard 8psi kit you wont get aanymore out of it by spinning the engine higher work on what the tpi is known for huge tourqe build on that and optimize your gearing and putting all that tourqe to the ground

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87 trans am 350 L98 aluminum heads,LT4 hot cam,slp runners,headers,y-pipe,edelbrock base,hi flo cat,air foil,ported plenum,t-5 tranny w/centerforce clutch and a 3.27 9bolt,ads strip chip,relocated iat sensor,hollowed maf

14.10@97mph w/2.01 60' LOOKING TO TRADE?ANYONE

 

oh yea, i was gonna switch everything out, forged inernals and better head/cam, but i was told long runners make the motor die out after 5 grand, any other options? it's gonna be a turbo setup eventually, no N20. thanks for the help tho.

 

Get a smaller turbocharger. It'll spool up fast and run out of breath by 5500RPM.

I plan on using 2 from a DSM (Talon, Eclipse, Laser) along with 2 intercoolers.

I have to get the engine running soundly before I attempt boosting it.

I would say with a stock bottom end and two turbos, 8-10 psi would make around 475 hp and 525 lb. ft. torque.

Also to clarify manifold problems....

A long runner wont hurt it because the manifold will now be pressurized

All you need to do is get bigger injectors (36 lb.) and a better fuel pump to keep up with them.




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Mike L.

"If it feels good - stay in it "

1987 IROC Z TPI 350 A4 3.27 Borg-Warner.

Mods: 2300-2500 Stall Converter, Shift Kit(GM parts), TPI Specialties Stage 3 PROM, Modified Airbox w/ K&N's, Relocated MAT sensor, Gutted MAF, Accel 8mm Wires, bypassed TB coolant, Flowmaster 3 chamber single 3" in/out muffler, airfoil, Random Tech Hi-Flow Converter (soon to go byebye!). ALL STOCK otherwise.
http://www.MichaelLasiuta.home.att.net

**BOYCOTT LAPEER DRAGWAY**

 

i was thinking dual T3's, i've found them pretty cheap from GN's in the junkyards around here. i was hoping to turn 6-7K redline tho, with all fordged parts, crank, etc. anyway, thanks for the info.

 

Yeah what he said - the long runner thing chokes a NA engine, but with forced induction, the air charge is "forced" in so if your engine and igntion is set up to spin high it'll spin high no matter what under boost. Have fun with that man wish I could afford the turbo hobby!

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"Life is pain! Anyone who says differently is selling something."

 

fyrhwk where in Ny u from?

 

a force fed TPI is a great motor, you get all that torque down low before your boost is built up, and once you get enough boost built up to 5-6psi+ your car will fly like an LS1

 

westchester county, white plains area, my town is right off the saw mill pkwy. an i'm hopin i'll have an LS1, right now it's a piddly little 2.8 v6, i hope i can get the swap done. an i wish i had the money for turbos too, shop rites paychecks leave alot to be desired