TurboRob
Enthusiast
****** Headers vs \'98 Manifolds...Dyno Results Within...
We installed the ****** 1 3/4" headers today, and as promised, I am posting my results.
Installation:
Straight forward. Driver side O2 in wrong location. We had to "clearance" the frame a little. No big deal, but took an extra 1/2 hour or so.
Fit:
Excellent.
Finish:
Okay, but not what you'd expect for an $1800 set of headers.
Sound:
I am already running a Corsa 3" system with no cats, but two Dynomax Bullits in their place. It sounded mean before the headers, and still sounds mean. However, it now sounds more like some kind of race motorcycle at WOT. At cruise, it's actually quieter inside the car. Yes, I said quieter. No drone at all.
Seat of the pants:
Feels like it gained noticeable TQ and HP.
RWHP Dyno Results:
Well, not as good as I had hoped. We only gained and average of 10rwhp. The benefit was visible from 4500 up on the graph.
RWTQ Dyno Results:
Not much better than the HP gain. 16rwtq pretty much from 2500 up to 5500.
My thoughts?
Not worth the money on a stock car for sure. (meaning without ported heads) Look great on the car, and the sound is pretty cool.
The only thing that makes me not feel so bad about the rwhp gain, is the fact that I am still running an unported intake and stock cam. Maybe the headers will benefit me more with a ported intake and a cam swap. Will it be enough to take me from my 11.18 to a 10.99? I doubt it, but I Guess we'll see this weekend in Columbus.
Maybe this will save somebody else from spending their money in the wrong area. Though I'm not sure how typical my results are.
p.s. I did multiple pulls on the dyno and altered the AF with the VEC1 to compensate for the headers. I could swing the AF a full point and still be within 5rwhp of each pull. So I don't think there is much more that could have been done.
We installed the ****** 1 3/4" headers today, and as promised, I am posting my results.
Installation:
Straight forward. Driver side O2 in wrong location. We had to "clearance" the frame a little. No big deal, but took an extra 1/2 hour or so.
Fit:
Excellent.
Finish:
Okay, but not what you'd expect for an $1800 set of headers.
Sound:
I am already running a Corsa 3" system with no cats, but two Dynomax Bullits in their place. It sounded mean before the headers, and still sounds mean. However, it now sounds more like some kind of race motorcycle at WOT. At cruise, it's actually quieter inside the car. Yes, I said quieter. No drone at all.
Seat of the pants:
Feels like it gained noticeable TQ and HP.
RWHP Dyno Results:
Well, not as good as I had hoped. We only gained and average of 10rwhp. The benefit was visible from 4500 up on the graph.
RWTQ Dyno Results:
Not much better than the HP gain. 16rwtq pretty much from 2500 up to 5500.
My thoughts?
Not worth the money on a stock car for sure. (meaning without ported heads) Look great on the car, and the sound is pretty cool.
The only thing that makes me not feel so bad about the rwhp gain, is the fact that I am still running an unported intake and stock cam. Maybe the headers will benefit me more with a ported intake and a cam swap. Will it be enough to take me from my 11.18 to a 10.99? I doubt it, but I Guess we'll see this weekend in Columbus.
Maybe this will save somebody else from spending their money in the wrong area. Though I'm not sure how typical my results are.
p.s. I did multiple pulls on the dyno and altered the AF with the VEC1 to compensate for the headers. I could swing the AF a full point and still be within 5rwhp of each pull. So I don't think there is much more that could have been done.
