You dont have any way to control the air fuel???

Not even a piggy back??



Wow, why worry about non sequential?

I would worry about getting an ecu.

Is non-seq. safe to do with having a cat and not a mid pipe. That's a mod I've never looked too much into. I just thought about getting a high flow cat. What's the pro's and con's to a mid pipe???

Well full benefit is a midpipe. A hi-flow cat is good too, if you want to keep the sound down and not pollute the air.



Midpipe PROS= free flowing exhaust, LOUD as HELL, cooler, less weight

CONS= Need Standalone/piggyback ECU, need to port wastegate, boost creep, boost spikes, LOUD as HELL



Cat PROS = quieter, doesn't pollute...uhm safer boost control.

CONS = all the PROS from midpipe unavailable... https://www.nopistons.com/forums/pub...1047683785.gif

Well you better be able to tune if you want a midpipe. Its the fastest way to blow up your engine if yuo dont make the proper adjustments.

Midpipe also will give you **** load of HP for a bolt-on.

You could go non sequential with a stock cat although anyone serious about having a fast car is gonna use a midpipe.

Do you have to port the waste gate with the non-seq? I thought I remembered reading that but I'm not sure.

Thanks again for all the input! You've been real helpful.

I think I'll go with the high flow cat for now.

Well you need resistors for the stock ECU or any piggy back system ie:PMC(Purple). If you have a PFC then you do not need resistors. Dave do NOT CUT your solenoid plugs off I said to cut the ACV controls off becuase it does not have an effect at all.



-Ryan https://www.nopistons.com/forums/pub...IR#>/bigok.gif

rikki.... can I just use the solenoids as resistors? like... keep them connected, but just disconnect the vaccume lines

yup sure can https://www.nopistons.com/forums/pub...IR#>/bigok.gif

and this will do the same thing as the 1/2 330 watt resistors or whatever???



also, the img below... I found this UIM laying around in my garage, can I use this UIM with all the accessories removed on a stock ECU or will I have problems, I have a stock UIM and the modified one so you can see what all was removed





http://home.houston.rr.com/ryscott/rx7/rx10.jpghttp://home.houston.rr.com/ryscott/rx7/rx9.jpg

Gotcha, dont worry I wasnt cutting ****.

I was leaving that one on you.

Besides we pulled out the limp **** of wires out from under the uim last night remeber.