NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   -   Carbureted (https://www.nopistons.com/2nd-generation-specific-17/carbureted-67614/)

shpaintball 10-11-2007 12:18 PM

what would that do just give it the power needed to start the car ? i mean the fuelpump ....make sense?

fc3s4utnv 10-11-2007 04:26 PM

If the fuel pump has straight 12v fuel pressure will stay constant

bbeasley 10-14-2007 06:25 AM


Originally Posted by Tom93R1' post='884460' date='Oct 5 2007, 01:47 AM
Weber is a 2 barrel. If you go with a Weber there are side draft (IDE) and down draft (DCO) as the two main styles. These are really the best style of carb if performance is your goal, but a 4 barrel like the Holley is better if you are going for drivability.



How much of a performance difference is there going from a TB to a Weber side draft setup? My car is a 1989 N/A track day car (never street driven)?

Tom93R1 10-18-2007 04:31 PM

I cant say, my weber is in the REPU which I never had fuel injection and I have no dyno numbers for it so cant make a direct comparison. I can say when the REPU was running its best it was about as fast or maybe slightly faster than a stock turboII. This was on a weak (low compression) stock 6-port S4 motor with racing beat header and straight through 2.5" muffler. weight for REPU is about the same as FC, but rear end is very high ratio so that also helps.

RX7 13B 4 UR AZZ 10-19-2007 12:24 PM

I might have a carb and manifold for sale but it is for a 4 port motor


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