questions about DP

[tl2uazn637]

If i were to get a new downpipe and a high flow cat, would there be noticiable performance improvement? our would i need to also get a catback exhust system in order to feel the improvement? also, whats the advantage for getting a high flow cat? would catless be better?

[GreenSL]

Allright newbie listen and learn. Me and ToolMan run tha NA stuff around here so we will help you in anyway possible.

The downpipe is a must. your top end will increase a lot. Also it makes the exhaust rumble. reported 13whp


Catback-- you can go with a million setups and i can give you my opinion on any of them. personally i would do what i did. There is a flange that connects the pre-muffler to the back of the system. Cut it off there and run straight pipes to some tips. it shouldnt cost more than like 150 or 200 at a muffler shop like meineke. My exhaust sounds wicked. If you want to change mufflers later you can. Cheapest and nets same gains as anything. good for maybe 3 or 4 whp. Questions on different mufflers i have answers.



The high flow cat is a false idea. do NOT get one. get a testpipe. it replaces the cat with a straight pipe and will also net actual gains. You will fail emmisioins with this off though. good for 4 or 5 whp



All together you should get about 17-20whp with the full exhaust. You will also get better fuel mileage.


Any other questions dont hesitate to ask!!!

[GreenSL]

Actual feeling you should get from comparisons is as follows.

In stock form your car should drop off the powerband pretty hard around 6300rpm. and should have no guts at 7000rpms.

With the catback system it should pull a LITTLE harder and drop off about the the same spot but not as dramatically or as fast.

With the combo of the cat back and the DP. my car pulls hard to the rev limiter at 7300rpm. i dont have a testpipe but it will be barely noticable just as the catback system. The downpipe you should really be able to distinguish a good solid upper rpm performance gain.

[Tool Man]

The only thing I've done is a test pipe, does make a difference, I wasn't sure, but I put the cat back on for inspection, and when I put the test pipe back on I could tell a real change doing a pull at 65mph in third.(Just my referance point.) DP is also a great way to go. I'll get one as soon as I can.

[GreenSL]

yep DP is king of NA mods other than Nitrous of course.

[ispro]

dp isn't the king of na mods... there are lots of things to do, cam gears help out a lot, notto mention it's somethingn to constantly play with, with the exhasut, and u should get a DP, and full system, not the test pipes, what's the point if they pull you over u can be ticketed for it, it is NOT emissions legal and u will fail inspection, green is right a high flow cat is BS,no difference, besides a cat doesn't slow you down that much... lightweight crank pulley / underdrive if u wish, when yu do exhaust you should do an intake system, replacing the tubes and everything, and go with a decent filter not the ebay 4 inch ones. get a nice 5.5 or 6.5 inch tube. research and shop around spend money wisely, and have a good time, don't forget working on traction!!! LSD insert or full LSD if u get too much hp for an insert to handle!! but have FUN!! -matt

[GreenSL]

Why isnt it the king of the NA mods?
I didnt say it was most beneficial.

It has been known and proven to significantly increase performance where others haven't.

Why should an LSD be better? Those pieces of shit cost $1000 for a damn differential. Nobody here buys cams for NA so nobody else dares buy them because they haven't been dyno proven to be worth anything. Cam gears will make a difference but nobody knows how much and wouldnt be as beneficial without a more aggressive cam setting. Why shouldnt you get a testpipe? put your regular cat on when you go to pass emissions. Anyone that tries to pass without a cat is wasting money and time. Once again, The crank pulley hasnt been dyno proven to do anything although people say they can feel a difference. Why the hell would you need a 6.5 inch pipe and cone filter? Deisels dont get them that big. Holy crap think straight. Its not like our 181 cubic inch engine sucks in 1050 cfm. Dont tell me you think you can make more power with a 6.5 inch tube. Either way youre gonna get like 2hp


Ohh yeah have fun trying to adapt a 6.5 inch pipe to your MAS :nutkick: :lol:

[ispro]

hahaha not a 6.5 in tube, a 6.5 in filter. wow 6.5 in tube wouldn't fit under the hood, and would look ridiculous, speedfreakracing 209$ for an lsd insert, and for some of the mild tuners out there there, that's more than enough, true some that go heavily into tuning, TT coversions w/fuel systems could use a 900 quaife that replaces the whole differential, people with intake and exhaust and some other mods, could get much better launches with an lsd insert!! in my opinion, especially stop light to spotlight racers, traction is king, our cars have some decent power, enough to out run most hondas, wanna improve on the 0-60, noticeably, the lsd will help, a DP is a great mod so is a light crank pulley! all of them are great bang for buck mods.

[GreenSL]

and go with a decent filter not the ebay 4 inch ones. get a nice 5.5 or 6.5 inch tube. research and shop around have FUN!! -matt

Thats why i thought 6.5 "tube"