3" is really limiting you?

 

I'd be looking elsewhere for restriction.

 

you could hear the exhaust pitch change significantly on the dyno above a certain maf hertz

Hockeyman's M62 car was really restricted with 2.5"

 

What was his mods? I thought 2.5 flowed pretty well

 

ported m62 with 2.7 and ATI damper. stage 2 cams, valve springs, E85, long tube header. he has since upgraded to 3" hahn piping with ZZP resonator and QTP race muffler, sounds great and flows a lot better, he picked up quite a bit of midrange

 

Well that boost flutter is back, along with the clicking noise from the engine.... About ready to ditch this car.

 

the muffler is more of the bottleneck then anything else

 

How come more guys dont run cutouts?

 

Not enough gains for the trouble probably. Plus you need the exhaust, dumping after the dp would yield no backpressure.

 

Really? We're going to do the back pressure debate again?
Come on guys...

 

I haz cutout, works well

 

I was thinking about running a cutout and then running stock catback for less noise. This catless with corsa is rediculous

 

I tried to run a cutout with my Zzp LT header. Ended up hiting the cutout on the ground cuz there's not much of a down pipe. So y would u need a exhaust bigger than 3".

 

back pressure is your enemy

 

2.5 exhaust supports 500 hp. just saying. lsj muffler is a gigantic heat maker. power killer.
nice to listen to tunes and cruze. horrible for power. just like a cruze

 

Was out tuning a guy last night for a 2.8...

Come to find out he was running a silencer...

looked at wot log
banged head on laptop!

Asked him, so you spent $300 on a chinese exhaust and put a cork on it! May as well of kept it stock

 

the muffler is the chocking point

 

MrB u keep mentioning the muffler being the choke point.
Im running the first gen Zzp exhaust with a magna flow muffler. The muffler Basikly has a 3" pipe running through it with a bunch holes in it. U think its a choke point??

 

I have ZZPs 2.5 catback...flow through magnaflows.

 

Auto Exhaust Science

 

A certain size pipe supports a certain cfm. Not a power level. It's that simple.
Resonator can wreck havoc on a tuned length header.
Read that link^^^

Edit: John beat me to it lol

 

Good read

 

This.

Lets not have a wave of people trying huge exhaust setups again.... That is old news.

and this....

I feel like we are going backwards in time now. Forward progress only people!!

Come on now man.

 

I have tons of other things to do before this but wouldnt mind trying an oval 3.5" setup

 

oval.... now that would be interesting to see.