Ive done some reading in a couple books and here on the forum but still have a few questions regarding a couple things i havent seen covered and some conflicting information. I have a 1986 z28 that currently has a slightly modified 305 tpi in it. A while back i did a upper end rebuild switched from 184 valve set of heads to a 194 set i had off a old 350. I also put headers and a 3 inch exhaust on the car. Now while its parked for the winter ive put in a solid posi rear end and am switching from a stock 700r4 to a 4 speed manual trans. And now that i finally have a solid drive train going in the car im thinking about taking that old 350 block and making a 383 stroker to put under my tpi intake system. I know enough to know ill have to get a diffident set of injectors probably around 26 pounds and then get a new prom burned. And then probably fine tune it with an adjustable fuel pressure regulator. However what im not sure about is it really worth putting a 383 under a stock tpi intake. Will a stock tpi intake and runners let a 383 breath well enough to make it worth my time. Also id like some advice on what heads would be best to run on it.

 

If your going to go through the trouble of making a 383 you probably want to use a better flowing intake on it, my choice would be a HSR and if your looking for a good head for the money Pro-filer's seem to make a nice one.

 

the stock intake has problems feeding a 350, you'll have to do some serious porting to use it on a 383. you might want to look at aftermarket products for a better alternative.

 

Thanks for the advice so far. I did a little more research and spent some more time looking into products and am wondering what you guys would think about me using the stock intake plenum porting it and upgrading to a larger throttle body and then putting that on a Edelbrock high flow manifold with their high flow runners? Would the edelbrock runners and minfold be worth the money along with the larger throttle body?

 

I would not use any type of TPI setup. I switched from a ported TPI plemun w/ twin 58mm TB to HSR and 1/8 mile E.T.'s went from 8.4 to 7.9. This was on a vortec headed .040 350 w/ the hot cam, 1.6 roller rockers hooker long tubes, 3000 rpm converter, 3.42 gears, and mt 26X10.5 et drags. With a TPI set-up you will never make power above 5200 rpm. Do not limit yourself. Do it right the first time. You can do hsr swap for less than the edlbrock tpi setup.

 

Now the HSR that works with the same computer system and fuel rails correct that is just a new intake system? And i was looking at the holi stuff and i can get it for like 650 used probably.

 

You can buy the hsr (holley stealthram) for vortec heads or non vortec heads. You have to buy the holley fuel rails and run new fuel lines from the new fuel rails back to where the factory rubber ones attach in the engine bay on the drivers side.The stock fuel rails will not bolt up. My old setup was with a stock prom and computer. I used to have a vortec hsr. I sold it and built a .040 sbc 400 with afr eleminator heads and used a non vortec hsr. The car runs 7.26 @ 95mph in the 1/8. Still with stock computer and prom. I might be able to get the vortec hsr back and sell it to you for cheap.

 

Ya the more Research i do the more it seems like the HSR might be the way to go considering performance and price. I do have one concern with that and that is im runing a 86 tpi system so ill still be runing this threw a stock maf sensor which will probably be a restriction on the air intake. But if you have one to sell let me know id definitley be interested. Just out of curiosity what size injectors are you runing in the 400 small block. Ive seen most people runing 383 talking about either runing a 24 or 26 lb injector. Also what was yer thoughts on the afr heads compaired to the vortec ones. Ive heard good things about the vortec heads from some people i know and one here people talk about the afs like there worth their wight in gold.

 

No it won't
Restriction is what the computer can read ; not the actual air flow through MAF sensor
Check out these times with a MAF
https://www.thirdgen.org/forums/post...41-post75.html

 

How do you want the car to run, that's the first question.

 

Well id like to maintain it as primarily a street car with the occasional trip to the strip and ideally id like to be pushing somewhere between 350 400 horse.