Hi guys. I just bought an '87 Iroc(305 TPI w/ 700R4) & have my 383 that i took out of my old '81 Z-28. Now i want to put this 383 in my 3rd Gen & use the factory TPI that came with it.
I KNOW NOTHING OF TPI practically!

I know i will need bigger injectors(30#) and will need to open up the intake, a 350 knock sensor & a custom prom or so. I need to know if i can use my cam....let me give you my motor specs

-383 stroker & maybe Vortec 64cc heads(comp 11.5:1) They are .100 dome pistons
-COMP xe284(240/246 DUR@.050..... .507/.510 LIFT, 110 LSA)

NEED HELP!!!!!!!!!!

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383 stroker, 11.5:1, Vortec heads, Comp XE284, Edelbrock RPM, MSD Distributor, Holley Strip Annihilator

 

1)you'll need to modify your intake or buy the one from scoggin-dickey to fit the vortec heads.2)those heads even when ported will hinder that combo with those ski slope lobes you got on that cam.3)over 240* @.050 is gonna play hell with the ecm(having a maf is a double edged sword).i would go with either trick flows or afr's and a cam similar to slp's large cam(224/230-will be easier to tune the prom)and either a superram or a well ported accel/as&m setup.24lb.hr injectors can support 400hp no need for 30's

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87 trans am,gm crate 350(4 bolt mains 10to1),L98 aluminum heads,LT4 hot cam,slp runners,slp 1 5/8 headers,3in.y-pipe,edelbrock base,hi flo cat,air foil,afpr,as&m ported plenum,gutted airbox,t-5 tranny w/centerforce clutch and a 3.27 9bolt(11.9in. brakes),ed wright's fastchip,relocated iat sensor,160 fan switch&t-stat,tb bypass,accel supercoil,cap& rotor,slp 3in. catbcak,a/c delete.

SHE IS GONE BUT I KNOW THE GUY WILL GIVE HER A GOOD HOME.

best e/t:
3653lbs./full tank+ driver.
14.10@96.53mph 2.01 60'

[This message has been edited by PETE (edited October 21, 2001).]

 

anyone else try & help me out!!!!

Please!!!!!!!!

 

carb it like I am doing. It will save you a chunk of change.

 

The stock TPI will choke your 383; if you want to build a stump-puller that tops off at 4000 RPM, you're OK, but if you're looking for more revs than that, you need a different induction system. Aftermarket runners and intake base, or something more radical will be required.

And Vortec heads can be ported to make a LOT of power. A local friend of mine had a pair on a 406 2nd gen. NA in the 12s, sprayed in the 11s. He's now running dart heads and is even faster, but the ported Vortec heads made a very fast car for him.

 

I ran the stock tpi on my 383 with the stock chip and it ran 13.50's. Get a chip burned for that cam and run the stock tpi until you can afford something bigger or port the stock stuff. It will run out of breath around 4300 rpm.