hytech muffler - Honda CRZ Forum: Honda CR-Z Hybrid Car Forums

B-rad · 06-12-2011, 05:06 PM

im new to the tuning scene and have a question for all you out there. when i ordered the muffler i had him drop down the inlet to 2.25 in because i thought full 2.5 in was too big for our engine. my question is when i install it i wanted the same pipe diameter from the down pipe back, should i get a 2.5 in down pipe and 2.5 in b pipe and have the muffler inlet back to 2.5in or leave it 2.25 and get full 2.25 in back? im looking for the most power and my future mods include a supercharger or turbo for around 200 whp but nothing crazy.

Whocares05050 · 06-12-2011, 05:33 PM

If you are going to add forced induction, stick with the 2 1/2

EDIT: Although, 2 1/4 will be more than plenty as well.

northbridge · 06-12-2011, 06:39 PM

I am not going to boost. My exhaust is 2.5 all the way back. Im picking it up Tuesday so it should be installed soonafter.

Whocares05050 · 06-29-2011, 10:43 AM

Quote:

Originally Posted by northbridge

I am not going to boost. My exhaust is 2.5 all the way back. Im picking it up Tuesday so it should be installed soonafter.

Why? Seriously?

Most K20 guys wont go bigger than 2 1/4 as you lose way too much lower end to make anything up in the top end. 2 1/2 all motor is really big for this car. Unless im missing something here....

TinTin · 06-29-2011, 11:34 AM

^ wrong.

Full Race 3" Catback - 8thCivic

I had a 2.5" on my R18 and i felt no loss whatsoever. Also Skunk 2 makes their exhausts in 60mm and 70mm. Those are both over 2.25"

Whocares05050 · 06-29-2011, 11:47 AM

Quote:

Originally Posted by TinTin

^ wrong.

Full Race 3" Catback - 8thCivic

I had a 2.5" on my R18 and i felt no loss whatsoever. Also Skunk 2 makes their exhausts in 60mm and 70mm. Those are both over 2.25"

Funny...

I dynoed 3 different exhaust setups on my 8thcivic. The greatest compromise for best low end and top end was 2 1/4

Any smaller and lost too much top end and any bigger lost too much bottom end but gained a little top end. Daily driving a car i wasnt about to lose 20 down low all day to enjoy 10 extra up top once in a while. I was a beta tester for cobb's accessport when it launched so i had over 300 passes on the dyno to experiment all the different setups i wanted. I know what did and dint make power...

Whocares05050 · 06-29-2011, 11:53 AM

Back on topic, how many Fit owners run 3 inch or 2 1/2? Not many...

This 1.5l motor would benefit more from 2 1/4, more than likely, over something much bigger (If the goal is all motor)

06-12-2011, 05:06 PM	#1 (permalink)
B-rad Supporting Member Join Date: May 2011 Location: aurora, il Posts: 841	hytech muffler im new to the tuning scene and have a question for all you out there. when i ordered the muffler i had him drop down the inlet to 2.25 in because i thought full 2.5 in was too big for our engine. my question is when i install it i wanted the same pipe diameter from the down pipe back, should i get a 2.5 in down pipe and 2.5 in b pipe and have the muffler inlet back to 2.5in or leave it 2.25 and get full 2.25 in back? im looking for the most power and my future mods include a supercharger or turbo for around 200 whp but nothing crazy.

06-29-2011, 11:34 AM	#5 (permalink)
TinTin Senior Member Join Date: Nov 2010 Location: Waterloo, Ontario, Canada Posts: 1,369	^ wrong. Full Race 3" Catback - 8thCivic I had a 2.5" on my R18 and i felt no loss whatsoever. Also Skunk 2 makes their exhausts in 60mm and 70mm. Those are both over 2.25" __________________

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06-12-2011, 05:33 PM	#2 (permalink)
Whocares05050 Senior Member Join Date: Jun 2011 Posts: 252	If you are going to add forced induction, stick with the 2 1/2 EDIT: Although, 2 1/4 will be more than plenty as well.

06-29-2011, 11:53 AM	#7 (permalink)
Whocares05050 Senior Member Join Date: Jun 2011 Posts: 252	Back on topic, how many Fit owners run 3 inch or 2 1/2? Not many... This 1.5l motor would benefit more from 2 1/4, more than likely, over something much bigger (If the goal is all motor)