just out of curiosity i was goin through racing beat website and found a 6 port carbuerator conversion kit kinda thing and im wondering what the pos and cons of removing computer controlled fuel injection and putting a carb on a 6 port? it just seems like a down grade to me but i could be wrong...im just curious if anyone can give me info or put me in the right direction

 

There isnt a good reason to do it. For the amount of money and time invested a good ems could be done. The only good reason would be if your using it for some form of racing that doesnt allow fuel injection.

 

Don't.

 

Agree with the others, don't do it.

Get a standalone EMS and call it a day. You may gain a bit of power with their kit, but in a narrow range and the rest of the RPM range will suffer. Stay away unless, as stated before, you are racing and can't use fuel injection.

 

I was running a pro-jay manifold and holley on my S5 FC for about 2 years. It came with them already installed. I had work done to the carb and manifold and installed a straight pipe. Made 169whp on a stock port motor on a mustang dyno.

The powerband was definitely in the upper range of RPM's. It was a complete dog down low though. I couldn't go anywhere past 1/2 throttle under 5k RPM, it would just bog. If it was cold out (~50s in florida), the car bogged so hard, it was almost undrivable.

You'd be much better off getting a aftermarket EMS or saving up for a turbo swap.

 

It makes the intake runners too short so you have no air velocity at low RPM and it just kills the engines low end. The 6 port + VDI are a trick employed to make short and long intake runners at varying RPM's. Stock runners are really long, so you have good low end power. When VDI kicks in, it shortens the runners by about 25% while also using the rotor intake port closing to induce a positive air pressure within the intake.

Work of art if you ask me. Who needs VVT when you can have VDI!

 

Keep in mind, when they developed that intake manifold and carb set-up, stand-alone's weren't an affordable alternative. They were selling that manifold/carb system long before I got into rotaries more than 12 years ago.

There are very few reasons to use their carb system these days, with affordable self-programmable EFI systems on the market, although the short runners of the intake manifold would be useful compared to the stock intake manifolds for high-rpm power. Still, there are better alternatives in that aspect.

 

I carbed mine, its fun

side draft s5 sp

 

Don't get me wrong. It was a blast. It was the constant tuning that killed me.

It didn't really like anything but WOT.

 

I bet your gas mileage is -2, haha!