midpipe or gutted cat?
12-07-02, 11:18 PM
#1
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Thread Starter
midpipe or gutted cat?
well obviously, a midpipe would be better...
but, right now i have a downpipe, and the gutted cat. would it be worth the money to buy a midpipe to get rid of the hollow cat, or would it be fine to just leave it on there for now? i would think it would be /almost/ the same, but i dont know how much better the midpipe will flow. TOO much flow wouldnt be good yet, i am still on the stock computer. tell me what you think
thanks
but, right now i have a downpipe, and the gutted cat. would it be worth the money to buy a midpipe to get rid of the hollow cat, or would it be fine to just leave it on there for now? i would think it would be /almost/ the same, but i dont know how much better the midpipe will flow. TOO much flow wouldnt be good yet, i am still on the stock computer. tell me what you think
thanks
12-08-02, 12:06 AM
#3
do you want your car to be fast for a few months or to have a motor for a few years
running a midpipe or cleared out exhaust on the stock computer is the most affective way to help add to the unreliable name that the rx-7 has
Even on an upgraded computer I would be extremely worried.
If you can find a way to keep the boost to 10 psi no matter what and are confident in this method go for it
running a midpipe or cleared out exhaust on the stock computer is the most affective way to help add to the unreliable name that the rx-7 has
Even on an upgraded computer I would be extremely worried.
If you can find a way to keep the boost to 10 psi no matter what and are confident in this method go for it
12-08-02, 01:52 AM
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sounds like to you need to start saving those paychecks like the rest of us and join the crowd; you need to get the Power FC computer, midpipe, exhaust and intercooler and then have a good dyno shop tune it.
12-08-02, 02:50 AM
#6
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The 3-mod rule doesn't work. Check out wade's site here for the proof (several of us have also verified it ourselves):
http://www.newwave.net/~flanham/wlan.../3modrule.html
A midpipe/gutted cat is a very major mod on an FD. I think it is insane to run one with the stock ecu because of the boost spiking and creeping that tends to happen. Either get a hi-flow cat to replace the gutted cat or do not do any more modifications until you can get an ecu. Getting an intake or cat-back exhaust would be very risky at this point. In fact, leaving things the way they are is risky. Get a boost gauge and verify what your boost readings are, especially at the transition and in 4th and 5th gear (higher engine loads --boost creeping situation).
http://www.newwave.net/~flanham/wlan.../3modrule.html
A midpipe/gutted cat is a very major mod on an FD. I think it is insane to run one with the stock ecu because of the boost spiking and creeping that tends to happen. Either get a hi-flow cat to replace the gutted cat or do not do any more modifications until you can get an ecu. Getting an intake or cat-back exhaust would be very risky at this point. In fact, leaving things the way they are is risky. Get a boost gauge and verify what your boost readings are, especially at the transition and in 4th and 5th gear (higher engine loads --boost creeping situation).
