High Flow Cat
#1
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High Flow Cat
need some help! just got my 93 fd about 3 months ago and the pre cat just went bad. the previous owner instaled a pettit intake, mid-pipe and hks drager. i am planning on buying a downpipe but have been reading alot about boost creep without an aftermarket ecu. i was thinking about just buying a downpipe and a high flow cat to swap out with the midpipe. would that solve the boost creep problem?
#3
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Keep the midpipe and get a downpipe and you'll see a big difference. there will be boost creep UNLESS u port the wastegate on the twins manifold or an aftermarket wastegate. I have a mid and ported the stock wastegate and perfect all the way.
#5
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I agree with Vegas. Get rid of that pre-cat and put on a DP and a quality Hi-flo cat. It will smell better, run quieter and you'll still see a substantial performance gain. You'll reduce underhood temps substantially and, as a new owner, you won't have to worry about porting the WG to avoid creep.
#6
I had a downpipe hks hi power cat back and a gutted stock midpipe. the boost would creep up to 14 or 15 every time. So i got an rx7 store hi flo cat and my boost never goes above about 12-12.5 and it sounds and smells much better.
#7
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thanks for the advice. im fixing to order the high flow cat from rx7 store and the downpipe. hope all fits well. im not sure if the dragger exhaust is a 4 inch. im fixing to check it out to find out.
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