i have a rx7 2nd gen with a 13b.

i want it for autocrossing and just a clean light weight car.

just a question on what else i need before putting my itbs on.

WHAT I ALREADY HAVE

1x Dual throat 55mm IDA throttle body
2x Fuel Rails (O'ring 11mm, 14mm injector type or hose tail)
Throttle linkages (Throttle stop kit and Throttle arm)
2x Pro-Series Bell-mouth Ram-tubes (Non-Turbo Only)
Accelerator Cable Bracket
Megasquirt fuel management
wideband o2 sensor

WHAT I NEED
550cc injectors boshe

for you guys who have done this already. what else do i need?

 

Intake manifold...

Not gonna run any kind of idle control I assume?

Patience for tuning and getting it running... all that comes to mind right now...

- Chris

 

Yeah, what are you doing for a manifold?

 

It's not pretty, but it works really well and my total investment is under $2,000. As a race car it just has to work. If we have time, then we make it pretty. It is difficult to fabricate a system from scratch and work through all the issues. We learned a lot and are far better race technicians now. I have gained a lot of experience in setting up a system like this using 'busa bodies and a Megasquirt. It works great and makes very strong power.

Eric

 

its probably the weber style throttle bodies from TWM (or whatever the acronym is) which is the as a weber carb in mounting. So any weber (or dellorto) manifold will work.

 

Looks like you forgot a external fuel pressure regulator? Not too expensive, but since you're not using the stock fuel rails, you'll need one.

 

I have a Sard FPR I'll sell you for $100 shipped!

 

23 racer. im have a set of gsxr 600 ITB's that im doing an identical set up with. hows your idle? whats your power band like?

i was going to use 9-11 inch runners. what diameter did you use?

any info you got would be great...

 

Get your injectors flow tested before putting them in. I bought some venom injectors and last tuesday my engine blue. I tested the injector flow, and one was like 620cc, and the other was line 820cc and they're suppose to be 720cc. Needless to see it seems like it ran one side way too lean, detonated we believe and blew the rear seals. And i was running ITB's also, the ones offered from Fuji Racing.

 

^^how do you like the fuji irtbs?

 

love them ... really responsive. I'll get some better dyno numbers once the engine is put back in the car.