Goal Minimum: 400whp in my FB

I plan on taking a s5 6port, replace the rotors with s5 turbo rotors.
I have a 45 dcoe but im thinking it will be too small for this turbo application although ive seen 45s on boosted 13bs. So my other option/idea is a Barry Grant 650 cfm blow through carb with a j&w 4 barrel manifold.. Turbo i plan on using is a Holset hx35 or 40.. Using a dizzy. The motor will be rebuilt.. Any one have any opinions and the planned setup, carb sizes, will it meet my goals and should i street port the irons or can i make the goal on the stock ports cleaned up a bit?

 

Might want to contact this guy. 1Revvin7

https://www.rx7club.com/member.php

http://www.youtube.com/watch?v=WQ5tbgnn-Fc

https://www.rx7club.com/showthread.p...ighlight=turbo

I would suggest going to efi. But, sorry I don't know anything about carbs/blow thru's...

 

I dont know about blow thrus on Rotarys, but have blow thru experience on V8s and 4bangers. Pretty damn good on the whole, to the extent that I cant imagine the 4pot (which was under 1.5 litres!) wouldve been any more driveable on EFI despite it being almost 200bhp per litre.

What I do know is BG blow thrus may be cheap, but almost nobody seems to be able to get them driving that well, total PITA.
Stuff like CSU and C&S on the other hand, people love. More money to start with, but way cheaper in the long run to get a good running car.

I've always wondered how good a well set up big turbo 13B running a decent CSU would be. I suspect pretty good.

 

Is there a reason you want to stick with a 6 port over a 4 port and also staying with a carb?

A long time ago I had an FB running a ported old style 13b 4port with a blow through weber down draft carb. This was using an old cartech turbo setup that ran air to water intercooler and a small T04b turbo. It ran really well for what it was, but it was a pain in the *** to tune and keep enough fuel to it.

If your going to rebuild the motor anyway, it seems to make more sense to just put T2 motor in the car and go efi. Unless you just want something different. 400 HP in that is gonna be fun but close to a death trap

 

Second that.... contact Elliot at turblown.net

 

Well i have a s5 NA motor already so i was thinking why not just use it instead of going through the hassle of finding a 4 port motor and the expense and if i was gonna go 4 port i might as well just make the 12a that is in it, the motor i build... I was going to stay carbie just to be different.. but everyone keeps yelling about tuning on a blow thru setup... i didnt think that it was going to be that much of a hassle on mid level HP.. most of it is just a matter of using what i have on hand already, im not trying to go super crazy.

 

what colors your car and your name? rotards up here are few and far beeeetween lol

 

i have a sunfaded red 82 with a grey driver side front fender... im on Ohiorotaries.com with the same SN

 

I got a 84 gslse parts car. the chassis is MINT! if you need something just ask. i never seen your car or anything but you hardly ever see anything around

 

If you don't know carbs well I wouldn't advise it, just pickup a e6k for $600 and call it a day if you are on a budget...

 

i second that! the e6k comes with instructions. also when you want to change the AFR's, with the ecu you hit a key on a keyboard, the carb you have to order parts and wait for a couple of days (holley might be the exception)

and all the jets and other BS adds up too.

 

you do know that a carb is by definition restrictive right? a venturi is a restriction. And you have no real timing control unless you lock a dizzy and use 3 auxiliary boxes to control timing advance (one for leading, two for trailing). Then you are going to throw 9.7:1 rotors on top of that? On pump gas that's just asking for trouble man. How are you going to reliably run a high compression turbo engine with no timing control?

There's a reason why people use 4 port EFI engines. Starting in '87 they were actually engineered to be turbo. I'd go with an RE or an REW. They are proven. A lot of people have been having good luck with the Haltech platinum sport as well.

 

I said I was placing s5 turbo rotors inside the block.. and a carb might be a restriction but it doesnt mean Hp cant be had out of them.. im not looking at crazy numbers. im locking the dizzy, plenty of HP has been made on a distributor... im not spending money on a re or rew when i have a block that is suitable for my power goals..so please read my whole original post before you start throwing out information that ive already addressed

 

thank you for the input ill look into the haltech... i also have a ins with an AEM universal i might be able to get as well.. just looking at all the options and opinions for my HP goals

 

You'll never do 400whp reliably on pump gas without real timing control.