4BoltMain

I just picked up another camaro yesterday. I already have an 87 Z28 all punched out with a t-56 and a carbed 383 stroker. But I want to go a different route with this car. It's a 90' T-top RS, 305TBI, with a 700R4. I am going to swap out the auto for a t-5 later on but I am going to focus on the motor first.
I have a few questions and I'm hoping some one will give me some insight, I work on jap cars for a living and I built my other car a while ago, so I"ve been out of the loop so to speak....

I wout like to kepp the TBI, I have a 350 4 bolt bored .030 and it has a 520 lift cam in it.

I want to know if I can us my old style heads(non center bolt for the valve covers?)
Will a TBI set up bolt to an edelbrock intake?

Chris

ShiftyCapone

iTrader: (7)

Which edelbrock intake are you taking about. If it is the performer TBI than you will need to drill out the 4 center holes to mate it properly to any pre 87 or perimeter valve cover head. I would get ready to burn your own chips. You sound like you have a monster motor planned. You will need a larger TBI unit, injectors, high flow fuel pump, and full exahust. Check out the TBI board for more info.

4BoltMain

Thanks man you answered one of my questions, sort of. It's an intake that would fit a 77 block.

Will the TBI set up bot up to where the four barrel would?
Probably not?

I'm guessing I need an edelbrock intake that's made specifaccle for a tbi?

ShiftyCapone

iTrader: (7)

You can really use any carb intake you want with a TBI adapter plate. That is one of the benifits of TBI systems. You have an unlimited amount of intake choices depending on what heads and cam you run. There are a few places that sell the adapter plate. These intakes however do not center the unit on the manifold and you can have unequal distrobution of your fuel mixture. The edbrock TBI intake is the best true bolt on intake for TBI systesm. It however, only has the stock bore size (1 11/16") but can be bored to 2". This intake is really on suited for 305's and mild 350's. I would go with a carb intake for anything over 350.

RB83L69

I'd ditch the 2-barrel TBI intake, get some kind of decent 4-barrel intake (Perf RPM, or maybe even a single plane depending on goals and the rest of the motor); an adapter plate, but NOT THE HOLLEY ONE; and a 454 throttle body.

TBI won't care one rip about the cam lift. Its computer might balk at the duration though, depending on what that is.

The 305 TBI exhaust is terrible. It needs to go, or you won't make any (or very little at best) more power than the 305 does. That means EVERY PIECE, from the heads to the street, but NOT FOR TBI; get chassis-specific - NOT UNIVERSAL - headers, cat, & cat-back for a 350 TPI.

4BoltMain

I planned on ditching the TBI intake, I have 2 that I could put on, I have the Weiand Team G(single plane) and a performer(dual plane).

The adapter plate is easy to find, but either intake is set up for a carb which has a square bolt pattern, and doesn't a TBI ony have 2 bolts?
I know the 454 Tbi only has 2 bolts holding it to the intake. The lift on the cam isn't that steep, it's only like a .520 lift so it's not much more than and RV cam....besides that the heads are 1.94's that have a 3 angle valve job and are ported, polished... It's got 10.5:1 compression...

What would you guys recommend for heads?
Headers?
Exhaust?

ShiftyCapone

iTrader: (7)

It has 3 bolts.

4BoltMain

Yeah, you're right, I forgot about the bolt in the middle/back....

ShiftyCapone

iTrader: (7)

Even though the TBI is a 2bbl the large plenum and runner size of a carb intake make it ideal for high power TBI set-ups.

4BoltMain

so how does it mount up with the adapter plate?
I'm guessing the adapter plate is more of a spacer that
the TBI bolts into?
WOuld I need 454 injectors or injectors off of a 350 tbi?

ShiftyCapone

iTrader: (7)

Yup you got it. It should have 4 bolts that will be flus with the top of the plate. I should be able to find you a pick of one.
I would just use the 454 injectors and tune them to work in the chip. The 454 unit will need a little fab work to the throttle bracket and you will have to modify your current harness to accept the different style IAC.

4BoltMain

See that's the part I am nervous about.
The tuning of the chip and all the other sensors.

Could I get away with using the 350 injectors and use an adjustable fuel pressure regulator?

I'm only saying because I have access to a 350 TBI.

I want it to be clean and streetable, but I also want the most bang for the buck.

Does anyone make a chip or anything specifically made for a swap like this?

ShiftyCapone

iTrader: (7)

The only thing close would be the caprice cop car chip. They can be found on ebay. If you leave the motor stock and use the 350 injectors this chip will work fine.