RPD_Vette84

iTrader: (30)

im in the process of collecting parts for my build. im building my 87 IROC with a turbo 4.8l. im planning on using a t70 turbo around 8-9lbs of boost. my questions are....


what size injectors should be good?
what size intercooler?
would i need a 3bar maf?
would a ls6 cam be good to use?

ive done a build like this before on a 87 rx7 with a t70 5.3l but it never ran well.\



thanx in advance

71 chevy

iTrader: (18)

thats about 600hp. 60lbs or greater should work

skip intercooler at 8psi

you shouldnt need a 3 bar maf

ls6 cam from what ive read pretty much runs good on everything lol

NemeSS

iTrader: (127)

sounds like a good build. Imo leave the stock cam. Big intercooler in the grille area. 60lbs. Injectors, biggest dp u can fit on ur turbo kit. Build a rising rate fpr return fuel system with a strong fuel pump. Like bosch 040

RPD_Vette84

iTrader: (30)

I was thinkin of running a full exhaust but also running a cutout and have it come out either the rear of the passenger side fender or just dump it.

Ok so I won't need a 3 bar map?

NemeSS

iTrader: (127)

Depends on how much psig u plan on running. U prolly gonna end up with a SD tune.

MUSTANGBRKR02

iTrader: (91)

Do not skip the intercooler. 60's should be good on that and the stock 4.8 cam should go.

Go with a 2 or 2.5 bar MAP and a SPeed Density tune.

RPD_Vette84

iTrader: (30)

I'm just wondering on what size intercooler? I was thinking a 24x12x3. But dunno if that'll be too much intercooler. My rx7 was on a SD tune and ill mostly likely tune this on a SD tune too. Its not goin to be a daily driver or a race car, pretty much its just goin to be something fun that'll alsolook good.

Always love the WOW factor.

turbo iroc

iTrader: (1)

Love the iroc builds! Yes use an intercooler, that size will work well. Don't skimp on the fuel system, you WILL want more boost. Boost is addicting

RPD_Vette84

iTrader: (30)

how would i build a rising rate fuel system? like what parts would i need?

Blownz28man

iTrader: (2)

Check out my build. I used the E-bay intercooler that size and notched the bumper. Perfect fit.

evo462

iTrader: (27)

You need a boost referenced fuel pressure regulator. For every 1lb of boost increase, it increases the fuel pressure to account for it.

RPD_Vette84

iTrader: (30)

ok just wanted to make sure. what size would i need if i want to run 8lbs?

sorry on my rx7 i just ran 55lbs injectors, 8lbs wastegate and just a 255lph fuel pump and it never ran lean. although i was never get into full boost before something would pop off. lol

turbo iroc

iTrader: (1)

Size intercooler? The one you mentioned will work well. Boost referenced fuel pressure regulator has a nipple on it to attach to a vacuum source, it will rise 1:1 with boost. My intercooler core measures 24x6x3.5 , that's just the core, the end tanks make it bigger. Here's the one I have, I didn't have to cut the car at all, just move the lower hood latch mount.

http://www.treadstoneperformance.com...es+Intercooler

RPD_Vette84

iTrader: (30)

the intercooler on that car was a 24x12x3

RPD_Vette84

iTrader: (30)

So I was talkin to some of my buddies last night about my build and they said that 60lb injectors are way to big. They said I should be good with 42lb. My buddy got out some horsepower calculator and started talkin all sorts of math non-sense and I just kept ignoring him (I ignore him cause all he does is read forums and puts lights on his car)

Mike@Diablosport

iTrader: (2)

With proper tuning there is no reason not to run the larger injectors.

Not to mention, 60's tend to cost about the same as 42's, and will leave some room to grow if you decide to make more power or go E85 in the future

RPD_Vette84

iTrader: (30)

Yeah that's what I was tryin to tell them. They were sayin that even with 42lbs they should be good for more boost but all I hear is people running with 60lbs

NemeSS

iTrader: (127)

I ran motron 60lb injectors with sd tune on my dd n/a 500rw for yrs. Its all in tune

RPD_Vette84

iTrader: (30)

got another question.

what spark plugs would you guys recommend?

pwrtrip75

iTrader: (8)

Dont use standard hose clamps....they suck and blow off.
You need the T-bolt style like this...otherwise like you experienced...