Maybe 12 to the crank. Don't expect to get much more than 5-7 dyno proven wheel-ponies unless you've done some serious work to the engine itself. (i.e. high-lift cams, monsterous air/fuel intake re-working, a nicely done T3/T4 hybrid turboWith a full cat-back exhaust system, and headers, possibly 12 to the wheels...
Originally posted by: psteng19
With just the exhaust, probably not.
With a full cat-back exhaust system, and headers, possibly 12 to the wheels...
... and with an intake
Boosthead? Yea, forget all this bolt on crap and just get a TurboNah, where's that turbo?
Originally posted by: dtyn
Boosthead? Yea, forget all this bolt on crap and just get a TurboNah, where's that turbo?(Make sure its a T3-T4 hybrid, lest you be the lucky bastard who drives a Supra TT)
*Drool*...if you're talkin the H22...mother help me. Those things have tons of potential (especially turbo'dIts gonna be on a Prelude motor in my Accord
You can't trust dyno's lest they give you all the information. Could have been a dyno with no chassis, in which case its giving you crank power not wheel power.cat-back and intake on a v6 accord gets about 12 or 13 more according to some dyno chart in a mag i saw not too long ago. AEM intake, don't remember which exhaust system.
Originally posted by: dtyn
*Drool*...if you're talkin the H22...mother help me. Those things have tons of potential (especially turbo'dIts gonna be on a Prelude motor in my Accord) I was gonna do a sick H22 swap into my Si, but I decided that the stock engine had potential if I rebuilt it.
Screw that, you have a car that fast, I would rice it up, then when all the muscle-cars come up to you thinking you're an easy kill, blow them away and make them live with the fact that they got killed by riceAnd for all the rice haters, my car is/will be completely stock on the outside except for rims and having been slightly lowered.
Originally posted by: hoihtah
it's all about efficiency and eliminating the bottleneck.
mufflers increase drag (reducing HP) to muffle the sound.
but it also creates a back pressure which is needed for the tuned engines to perform better.
so you give and take.
between the loss and the gain, you need to measure which is greater... and eliminate the bottleneck that way.
but to say that mufflers will add HP... flat out,
that's greatly misleading.
with that logic, no muffler is the best muffler.
but we know for fact that this is not the case.
you need to tune/match your engine to your muffler for the best result.
Hell no...no muffler means no backpressure, meaning no low-end torque, meaning what little econo-mobiles have disappears, meaning it takes forever to reach your powerban, meaning really slow, geo metro-type car. Less restrictive is good, full flow is bad.Umm... Wouldn't no muffler be the best muffler?
tuned works well for 2 cycle, but i think you're right, for 4 cycle running none is best. dragsters don't have much in the way of exhaust systems, and really thats just to route the flame and hot exhaust from the tires.Originally posted by: Eli
Originally posted by: hoihtah
it's all about efficiency and eliminating the bottleneck.
mufflers increase drag (reducing HP) to muffle the sound.
but it also creates a back pressure which is needed for the tuned engines to perform better.
so you give and take.
between the loss and the gain, you need to measure which is greater... and eliminate the bottleneck that way.
but to say that mufflers will add HP... flat out,
that's greatly misleading.
with that logic, no muffler is the best muffler.
but we know for fact that this is not the case.
you need to tune/match your engine to your muffler for the best result.
Umm... Wouldn't no muffler be the best?
Any restriction in the exhaust flow is going to decrease power... straight headers should be the best for any 4-cycle engine, as far as that goes. No?
We're not talking about 2-cycle engines here. What is there to tune in a 4-cycle exhaust system?![]()
Dragsters also idle where you redline, meaning they don't need low-end torque. Totally different than a street-legal car.dragsters don't have much in the way of exhaust systems
Originally posted by: psteng19
With just the exhaust, probably not.
With a full cat-back exhaust system, and headers, possibly 12 to the wheels...
... and with an intake
Originally posted by: dtyn
Hell no...no muffler means no backpressure, meaning no low-end torque, meaning what little econo-mobiles have disappears, meaning it takes forever to reach your powerban, meaning really slow, geo metro-type car. Less restrictive is good, full flow is bad.Umm... Wouldn't no muffler be the best muffler?