i have a a 88 TURBO full time 4wd a/t wagon, if i was to remove the catalytic converter ,the one right at turbo [ football shape] and put 2 in or larger pipe there ,and run 2in pipe all the way back to exhaust , how much more hp would i get ? how about mpg ? + make car run alittle cooler ?

i have a a 88 TURBO full time 4wd a/t wagon, if i was to remove the catalytic converter ,the one right at turbo [ football shape] and put 2 in or larger pipe there ,and run 2in pipe all the way back to exhaust , how much more hp would i get ? how about mpg ? + make car run alittle cooler ?

Maybe 10-20hp, mpg would improve slightly, cooler? i don't think so. A 5 spd trannie would be a good improvement if you want more power to the ground.

...A 5 spd trannie would be a good improvement if you want more power to the ground.

I don't think that that is an option as IIRC that is MRS. 86subaru's car!

 

I would still keep a catcon on this, but just a high flow 3-way cat. I don't think the HP will increase as much as vanislru suggests unless your current catcons are clogged; unless you go to higher boost you should not see higher than original-stock HP. You probably would see less boost-lag, though.

 

You might think about an intercooler, as it might give more real-world advantages.

ok thanks pat

I was thinking he'd have 2" from the turbo back but after reading it again I see he means the second cat. A good improvement would be to use a quality boost controller. Even if you use stock boost the turbo will still spool faster because the wastegate is not open until the controller actuates it.

Its all about the air