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?

 

Yes. You need to get rid of the midpipe. Replace the pre-cat with the DP, install the high flow cat, and you won't have any problem with creep.

 

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.

 

Isn't the super dragger exhaust a 4 inch exhaust?

 

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.

 

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.

 

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.