I have come to the conclusion that the motor itself can take a nice amount of boost, but the fuel system is the key to making everything work, I know that the carb on it now would be a bit over worked. Is there a way to do double carbs? Or is there a single carb that would be sufficient enough for my needs? Also my fuel pump will need upgrading, what pumps should I look into and also avoid?
12's is the goal now but faster is always better too, what can be used to get to 10's 11's, but also work for 12's?
And I know with a piston engine there are programs that can give you an approximate amount of HP compared to boost, is there anything like that for a rotary?

 

check out www.mazdatrix.com they have intake manifolds made for holley carbs, the biggest i have seen on this manifold is 650cfm, i am not sure if you can go bigger with that manifold of not. are you trying to make this a street car? all motor? turbo?
i dont think a N/A 12 second rex would be streetable. it is a whole different story with a turbo though. according to rx7.com the fastest all motor 7 with a full body is runnin a 14.19 with a 13b.
you need to specify about the setup you are shooting for, what motor you plan on running, street or drag car, and your budget.

 

it would be great to know what kind of setup your shooting for. you can always got a a full 13bt swap and upgrade the turbo and your in the 12's or stay n/a and give it some juice. its all preference backed up by your buget...

 

sorry i read that first scentence wrong my eyes are all f'ed up, now i know it isnt gonna be N/A. still more specifics are needed to answer your questions.

 

If you are going to go with a blowthru carb setup, go with the smallest carb possibe that will provide enough fuel. When forcing compressed air into and past a carb you want the smallest runner possible to make the volocity as high as possible so that the carb will meter the air better.
There are quite a few turbo mustangs with blowthru setups, most of the milder setups run a single holley 600 and are making around 500hp at the wheels.
There is a yahoo group dedicated to blowthru setups that would be worth a browse. Lots of good tips on sealing up the carbs and such.

Later
Randy

 

well the 84 project car me and a couple of friends built ran a 12.5 1/4 time breaking the turbo at half track! we tried 2 setups on the car an ambient system and then fuel injection on the streetported 12a. i know the car would make a sick time if we could manage to get a full run out of the car! one thing i will tell you is beef up the drivetrain and suspension. our car was pulling the front wheels clear off the ground and broke the rear suspension on the first run planting the passenger rear tire into the front side of the 1/4 panel trying to throw the car into the wall!!

 

To run double carbs, you would need a manifold for it. They are commonly called tunnel-rams. I've only seen them on V engines because the manifold sits on top the block in the wedge of the V. The carbs are linked together so that the throttle controls both. Its a massive assembly, and I've never seen one custom made for a rotary.

 

I have seen double 4 barrell carbs on a rotary befor. they were tunnel rammed and they were stock 12a nikkis. He was running them on a ported out, 6 port engine (NA). The manifold of course was hommade, but the set up runs really pretty good.

CJG

 

Is there any company that has carbs specificly ment for turbo applications? There is no place that i have found that is quick and easy to go through. But this is about the 10 day i have been working on this car. Any good sites i can go to?
At this point i dont care about street worthyness of this car, i would like it to be street legal, but thats not important either.

 

Hey joelwahid thanks for the link.

 

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