Exhaust

[twisted2]

hey guys I'm thinking put exhaust on my ae71 currently running a 4ac but the 4age is coming one day. I was thinking 2 1/4 and one muffler just wondering what system other people are running?? or recommend

[19914afc]

ive got extractors with 2" to and just over the diff with one muffler in the middle of the system and 3" straight pipe from the diff back, on my T18 with a 3t its not as loud as I thought it would be.

Edited September 27, 2010 by 19914afc

[Lachlan H]

I've got AE92 running 2.5inch pipe from cat with single muffler on a 4afe, sounds amazing. Wouldn't go any diff. Was done by ace exhausts in melbourne $250

[Lachlan H]

Heres my exhaust, sorry for poor quality :)

 

[AE92Nova]

my Ae92 Nova 4AFC is currently sitting at my mums, waiting to get my licene back...

 

have set of extractors with a 2" cat back sports performance exhuast with a muffler at the back... was a Decent Incraese in power. with a nice raw added... Huge fuel efficents.

[Twincam16seca]

Personally i wouldn't go any bigger than 2.5-2 1/4 inch as the exhaust gas looses its speed and becomes more turbulant the further down the system it gets.

 

The gasses only cool as they exit from the motor into the headers right? yes! so the system can actually step down in size from a 2.5 inch collector at the end of the headers into the cat then from the cat down to say 2 1/4 inch then to even 2 inch straight through muffler at the end if you like.

As the exhaust gasses cool they compress slightly thus not requiring a large pipe, this is where the smaller diameter pipe helps as it keeps the exhaust gas "air speed" high causing a scavaging effect and drawing out the gasses in the system.

 

I have not yet tried this but i learnt it from a close friend of mine who had old school KE11 sprinter with a 3or4k race motor and other rollas (V8 eater he tells me), he was a mechanic by trade now works for Bosch.

 

I have a 2 inch stainless mandrel bent straight through system from cat back on my ae82 twincam seca with genuine RS*R headers from a jap motor and a 3A racing pod, it droned like a b?*ch at a 80-100ks so i had the crappy stainless autobarn 2.5 inch muffler (not a cannon, hate them) cut up, repacked and narrowed by a friend and its heaps better!

 

That my thoughts

[ninja-philbo]

cut it off at the head will sound sic haha

[altezzaclub]

I've tried it twincam- I have 2inch extractors on the 4K through 2" pipe to a 2" resonator, then it leaves that at 1& 3/4" to the end. rob83ke70's idea.

 

I fitted the 2" gear initailly and left the rest stock for 6months, then when I had the cash I changed all that for an instant improvement in low-down power.

 

...and a much nicer growl!