exhaust hp gain?

[dukehoopskm]

Puttin in custom 2.25 catback piping and a straight through design magnaflow muffler... anyone know the estimated hp gain for my 90 accord ex?

[MRX]

5-6 horsepower

[Nycxeracer]

Well, exhaust systems alone won't do much. However, in conjunction w/a free flowing intake and header, you might see 3-5whp gains from a cat-back exhaust system. I know it isn't much, but HP=Money.

[typhoon]

Well, exhaust systems alone won't do much. However, in conjunction w/a free flowing intake and header, you might see 3-5whp gains from a cat-back exhaust system. I know it isn't much, but HP=Money.

So your saying I/H/E only nets 3-5 whp. That sounds awfully pessimistic to me

[DrLove'sKuDang]

maybe a tad more, but considering the f22 isnt a very potent motor to begin with... increasing flow wont help much. that motor doesnt need much flow. without boost, its pretty weak.

but on others, it can make a big difference. on my car, just removing the silencer net me about 15whp. and a friends b20vtec went from 172 to 197whp(untuned) just by swapping the aftercat piping to a bigger free flowing setup... instead of the stock pipes.

[typhoon]

I would think I/H/E + highflow cat + upped fuel pressure + cleaned injectors = 12 whp on F22

[spdACCORDingly]

I would think I/H/E + highflow cat + upped fuel pressure + cleaned injectors = 12 whp on F22

^^^Maybe. I/H/E like the other are saying won't do a whole lot. If u add the other stuff then maybe but still, don't be disappointed it you don't get your 12 whp.

[PRIMOCB7]

with I/H/E, possibly 12-15 hp to the crank, but around 6-8 to the wheels; and thats if your car is running right..no CELs, timing is correct, etc.

[starchland]

^^I agree, alot of people that mod cars, dont even make sure its running top notch in the first place. Making sure a car is tuned of properly is like a mod and hp gain right there.

[ZigenBallZ]

I've seen dyno charts on a bolt on F22A1 and the gains are pretty decent with the big 3...

Depending on brand and condition of the motor... you can gain roughly 4-5 with each for a total of 14-16 at the crank...So maybe 10-12 at the wheel swith a manual...but these were premanufactured aftermarket parts with R&D put into them...

BUT...

Don't estimate about HP gains...there's no point to it.. you either feel it or you don't...you can either dyno it or not... any guesses would be just for perceived bragging rights which is lame...and if you do that you will be asked about how you know...dyno plots, etc...

[typhoon]

I am going to do a before and after dyno when I get all my mods done plus have it tuned. But I'm hoping and guessing for at least +12 at the wheels. Any less and I'll be a little disappointed.

[wed3k]

i cant feel that much on my budget setup...
ghetto intake, dc header, carsound cat, magnaflow muffler with stock piping.