232whp, 218wtq version TRM tune rocks!

[Mr Two]

Your exhaust seems like it's on the small side... Stock e36 M3 is dual 2.25", isn't it? I'm running full dual 60mm more or less - Headers end in 60mm piping, then dual 2.5" center section, then UUC System U - dual 60mm. A single 2.5" exhaust doesn't seem like it would flow nearly enough - People run larger diameter piping than that in the Honda scene for N/A. My friend's S2k runs a J's Racing 70RR, which is a 70mm headerback - 70mm is just over 2.75".

Polak, I weighed my car - 2540 with no driver and a half tank!

[Jonny Cash]

No, definitly not too small. Anything more than that will create backpressure.

People run larger diameter piping than that in the Honda scene for N/A.

People do alot of retarded things

Great numbers, Id love to see this car in action. To be honest, Im not sure Id want much more power than that. I recently tore into a turbo S52'd M3 wihich put down around 350hp. i was scared of it, too much unusable power.

[Wh33lhop]

People do alot of retarded things

Especially in the honda scene.

[Mr Two]

No, definitly not too small. Anything more than that will create backpressure.

That seems counter intuitive. Would you care to explain your reasoning? The problem with too big of an exhaust would be the loss of exhaust velocity, would it not?

And my grasp of fluid dynamics is feeble, but it would appear that his exhaust flows significantly less than stock piping would.

There are a lot of good N/A tuners that work with Hondas.

[Wh33lhop]

That seems counter intuitive. Would you care to explain your reasoning? The problem with too big of an exhaust would be the loss of exhaust velocity, would it not?

Indeed.

And my grasp of fluid dynamics is feeble, but it would appear that his exhaust flows significantly less than stock piping would.

There are a lot of good N/A tuners that work with Hondas.

Of course there are. But there are also the guys running full 3" exhausts for a 160whp B18C1 (I knew one of them).

[Jonny Cash]

Does the term "exhaust scavenging" ring a bell? If not, you should do some reading.

fwiw, I would guarantee more TQ loss than hp gain in the said setup going with a wider diameter. Not claiming to be a physics whiz, just sayin.

[MIKe30]

we'll if single 2.5" is ideal for these motors then I'm in trouble... running euro headers, euro midsection, stromung catback.

[Jonny Cash]

running euro headers, euro midsection, stromung catback.

english, please :)

[z31maniac]

That seems counter intuitive. Would you care to explain your reasoning? The problem with too big of an exhaust would be the loss of exhaust velocity, would it not?

And my grasp of fluid dynamics is feeble, but it would appear that his exhaust flows significantly less than stock piping would.

There are a lot of good N/A tuners that work with Hondas.

Don't the last Gen Camaro guys run a single 3"? With a fucking 350 V8? How a 3" could be a good thing on a Honda 4 banger I have no idea, even FI on a 2.0L a 3" sounds too big.

There has to be some backpressure in the exhaust to help with scavengeningng.

[z31maniac]

Oh and it also appears the S52 put down 232whp with either a warped head or leaking headgasket.

Yay for pulling the motor and exchanging it.

[MIKe30]

Oh and it also appears the S52 put down 232whp with either a warped head or leaking headgasket.

Yay for pulling the motor and exchanging it.

OOOOMMMMGGG. So sorry to hear it dudey... Plan on doing it asap or when things calm down with the house and winter starts?

[digger]

Don't the last Gen Camaro guys run a single 3"? With a fucking 350 V8? How a 3" could be a good thing on a Honda 4 banger I have no idea, even FI on a 2.0L a 3" sounds too big.

There has to be some backpressure in the exhaust to help with scavengeningng.

Back pressure is never a good thing, its exhaust velocity that helps with scavenging. Big exhausts lower exhaust gas velocity thats why they can lose power at low rpm.

[z31maniac]

OOOOMMMMGGG. So sorry to hear it dudey... Plan on doing it asap or when things calm down with the house and winter starts?

I'll probably try to get it pulled next week. I need to buy an engine hoist as the one I was borrowing from my buddy was a piece of junk.

At least now I have a garage to do it in!

[Jonny Cash]

Oh and it also appears the S52 put down 232whp with either a warped head or leaking headgasket.

Yay for pulling the motor and exchanging it.

That really blows, sorry to hear that..

[mazur]

Back pressure is never a good thing, its exhaust velocity that helps with scavenging. Big exhausts lower exhaust gas velocity thats why they can lose power at low rpm.

Sorry for being a little OT, but I noticed your sig. You have a turbo to make that kind of power with an M20, right?