I know about the three mod rule and everything but I was just wondering if a high flow cat would be safe to run with what I have done.

pettit 3" catback
pettit intake

and also if I were able to put the high flow cat on could I also put on pulleys?
any info would be great.

 

I think you can put any mod you want, as long as you keep your boost at 10-8-10. However it might be a little hard to keep it at that level with the mods you have. So you might want to get ecu.

 

Another thing I was wondering, if the boost does start to go up and for now instead of getting a stand alone just go with something temporary like the apexi s-afc or hks afr would that be able to handle the extra fuel I would be needing. or do I really need to tune the ignition maps and all that other fun stuff?

 

or would getting a boost controller fix the overboost?
(sorry I couldnt keep this all in one post this just hit me)

 

A hi-flo cat will be ok as long as you can keep the boost at stock levels (as stated above 10-8-10). The stock ECU has been shown to provide enough fuel a the stock levels for several bolt-ons.

The problem you might see is boost spikes. A hi-flo cat will have enough backpressure to keep boost creep from being a problem. That being said, a boost controller will help if you do encounter boost spikes.

As far as the fuel management systems like AFC are good for removing/trimming fuel from the system, but not necessarily for adding.

Good luck.

 

oh yeah by the way with a high flow cat can I remove the air pump. or is that not a good idea. Also I was wondering would a mid pipe be safe for my application

 

A mid-pipe might be pushing it. You would 99% sure run into boost creep. That would be deadly on the stock ECU as it would give you NOTHING to fall back on, which you would if u had an aftermarket ECU with conservative tuning.

 

But he could control it with a ported wastegate and some form of boost control could he not?

 

yeah, or a blockoff plate of some sort. But just be extra careful on the stock ECU

 

Cool, I actually learned something right for once!

 

damn double post......

 

Never put on a mid-pipe while still using the stock ecu. It is way too risky.

Why do you want to put a hi-flow cat on? A downpipe would be a MUCH better choice for your next modification. Get an ecu to handle the increased boost or get a boost controller to maintain stock levels. The Greddy Profec B is only about $300 and works very well.

BTW, I would not remove the air pump while still using the stock ecu. Most hi-flow cats would still benefit from using one. If you have emissions testing, you cannot pass without one.

 

thats basically what I was saying, but he seems to want to do whatever he can with the stock ecu, safe or not. So....

 

Jees man its not like iam not listening to other peoples advice. The whole reason iam asking about the whole cat thing is because ever since I put that intake on I cant stand the sound of the air pump. It sorta sucks driving when everytime I give it light throttle I hear this loud throaty grunting noise. Just didnt want to you to get the wrong idea thats all.

 

oh my applogies, I didnt mean to come off like that after reading it it sounded harsh. what intake are you using? they make block off adapters that go into the air pump intake part that muffle the noise somewhat

Again sorry I came off the wrong way. I applogize

 

[QUOTE]Originally posted by Rx-7$4$me
oh my applogies, I didnt mean to come off like that after reading it it sounded harsh. what intake are you using? they make block off adapters that go into the air pump intake part that muffle the noise somewhat

Again sorry I came off the wrong way. I applogize [/QUO


oh well no big deal, dont worry about it . Well I bought it used and it didnt come with the piping for the air pump so I sorta made my own. Do you have any suggestions where I can get one of these silencers or... by chance any suggestions on how to make one myself. any help would great

 

hmmmmm, you know what, I might be able to hook you up with mine from my old Apexi intakes, I dont really need it anymore with my greddy intakes, I cant hear that mooing to much anymore with my new exhaust, so, I guess if uwant it its yours.

 

Thanks man!! seriously that mooing really took the fun out of driving. So.... how do you want to do this. are you sure you dont want any money for it ill gladly
pay you.

 

To stop the mooing sound go to home depot or lowes and get a lawnmower muffler and hose clamp it to airpump hose. It works and cost very little. If you are worried about how the muffler looks then get a little more hose and run it down under the intake. This mod makes the airpump almost silent.
mike

 

thanks a **** load man. any specific muffler?