I have an 85 Z28 with a 383 stroker in it. The guy I got the car from didn't put the right intake on it (I think it is the stock TPI intake) and told me if I wanted it to run 12's instead of 14's I had to get a bigger intake. But I am having a hard time finding an intake for a 383. Since it is a 350 block can I use a 350 intake? also this is a fuel injected engine, not carbed and most of the intakes I have found are for carbed engines. Any suggestions?

 

He's right, TPI will cost you a good solid 100 HP off of the potential of a typical 383.

The 305 intake is the "right" TPI intake for a 383. It's the only one. There are a few aftermarket ones, but as far as stock, there's really only the one kind in these cars. The ones in Vettes are sized the same but are otherwise slightly different.

Yes, anything that will fit a 350 (or a 305) will also fit a 383. The added cubic inches by themselves won't cause the engine to reject an intake transplant or anything like that.

The best solution depends on a number of things, especially emissions laws in your area. Carbing it is always an option, if you want max power the easiest way, and don't mind sacrificing gas mileage. There are fuel injection systems that support far higher HP than TPI. But they are not emissions legal in all areas. Of course, a 383 isn't either. And depending on what heads your motor has, it might not even be an issue.

More details about the motor, your goals, and your budget would help narrow down the choices a little bit.

 

Emissions laws are not a problem for me as I have a good friend to do inspections and gives me a sticker as long as my lights and all that stuff works. As far as heads goes, I really don't know much about the motor since I didn't put it in. I could probably call the guy and ask him the specifics (which I actually thought about doing since I have been looking at mods and I need some details about the motor). My budget isn't really a concern either, but obviously I went the best parts for it. As far as the fuel injection, I would like to keep it FI since I feel it is more reliable than carbs (it starts the same everytime, it doesn't need to adjusted and all that stuff). As an overall goal for the car, I would like it to run the best times it can (obviously) without supercharging or NOS or any of that junk. Hope this helps you help me!!!

 

Find out what heads and cam it has. Those things are critical. You can pop a valve cover off and get a casting number from under there. The cam is a different matter since you can't see it. See if you can get the person to tell you exactly what it is, by part number; "stock" or "¾ race" won't get it.

If you want to keep FI, probably the cheapest easiest way to go is the Holley Stealth Ram. It flows enough to support about 450 HP. You'd need some appropriate injectors of course, and a few other things. As long as you don't have a visual inspection requirement, this can be made to pass the sniffer test, given the correct tuning.

http://www.holley.com/HiOctn/ProdLin...FMS/SR/SR.html