exhaust gains

[Quick2000]

Yesterday my friend and I finished a 2.5 inch exhaust for the rolla with a high flow cat to a flowmaster. It is definitely a pretty big gain over an axle back exhaust with a torque and horsepower increase. I was wondering what exhausts y'all are running and what gains you had? Has anyone done a header, downpipe and full exhaust? My next step will probably be to make a custom header with a 2.25 inch outlet instead of the downpipes tiny 1.75 inch outlet.

[PhatRoyale]

What does a "pretty big" gain mean?

Dyno sheets?

[Quick2000]

I wish I had the money to dyno right now. But I would say 10-15whp. You also have to realize I can't even hit max power because of the low rev limiter on the rolla. If I could go up to 6500 where my max would be I would say 20whp gain or so.

[PhatRoyale]

Originally Posted by Quick2000

I wish I had the money to dyno right now. But I would say 10-15whp. You also have to realize I can't even hit max power because of the low rev limiter on the rolla. If I could go up to 6500 where my max would be I would say 20whp gain or so.

This I would like to see.

Post up a dyno sheet once you are able to get it.

[Quick2000]

I'll see what I can do. Maybe a time slip for the 1/4 mile too. What gains have other people seen?

[RoachRolla]

i have a Magnaflow 2.25" catback. felt like i lost low-end power but i felt increased power at higher rpms. the car seemed to pull a lot better

[crolla56]

Quick2000 which part of MD do you live?

[Quick2000]

Southern. I doubt you know where huntingtown is. What about you?

[crolla56]

Nah im not too sure where that is. Im in greenbelt, you are prolly like 50min away from me.

[Quick2000]

How far is that from Annapolis? That's where I work.

[crolla56]

30mins give or take.

[redtherocket]

Originally Posted by Quick2000

Yesterday my friend and I finished a 2.5 inch exhaust for the rolla with a high flow cat to a flowmaster. It is definitely a pretty big gain over an axle back exhaust with a torque and horsepower increase. I was wondering what exhausts y'all are running and what gains you had? Has anyone done a header, downpipe and full exhaust? My next step will probably be to make a custom header with a 2.25 inch outlet instead of the downpipes tiny 1.75 inch outlet.

[Quick2000]

?

[redtherocket]

2.5" exhaust on a 1.8L daily driver??


Flowmaster?



Gains?

[PhatRoyale]

Originally Posted by redtherocket

2.5" exhaust on a 1.8L daily driver??


Flowmaster?



Gains?

OP posted gains right here:

Originally Posted by Quick2000

I wish I had the money to dyno right now. But I would say 10-15whp. You also have to realize I can't even hit max power because of the low rev limiter on the rolla. If I could go up to 6500 where my max would be I would say 20whp gain or so.