Headers??

[VIRUDEBWOY]

Restrictive stock exhausts were made to fit most consumers that want their rides as quiet as can be, the drawback of that is that your engine works twice as harder to push out those exhaust gases. Once you open that piping up and let your engine breathe (Of course not too much 3" Piping w/out boosting will hurt more than help) you will see not only performance gains but you'll be able to squeeze out a few more mpg. So Performance over Stock is the only way i'll ever go.

[djeaux]

I'll admit to having not messed with headers in about 20 years. (I used to run 'em religiously on my vehicles in the pre-cat days.) One thing I always noticed was that I was taking off very heavy cast iron things & replacing them with much lighter pipes. I figured the last set of headers I installed (on a 360 c.i. Dodge) weighed less than half as much as ONE of the cast iron monsters I removed...

[alexander]

Originally Posted by Chefelvis

The proofs in the pudding my friend... and how many cats have you removed?

none

even when I'm done my RL will actually polute far less than stock

Originally Posted by VIRUDEBWOY

Restrictive stock exhausts were made to fit most consumers that want their rides as quiet as can be, the drawback of that is that your engine works twice as harder to push out those exhaust gases. Once you open that piping up and let your engine breathe (Of course not too much 3" Piping w/out boosting will hurt more than help) you will see not only performance gains but you'll be able to squeeze out a few more mpg. So Performance over Stock is the only way i'll ever go.

The thing is auto manufacturers have targets to meet thats why ferrari 3.5L's can make 425 hp stock. The RL was designed for a certain segment with very specific performance targets, making it more powerful doesnt necessarily mean it would be louder.

BTW the baja RL uses a 3in collector for max power

[Chefelvis]

So your telling me by adding a cat-back exhaust you have gained 25 horses? If thats true then Im sold.

[alexander]

http://youtube.com/watch?v=m088vPcQUKM

[2point6]

Originally Posted by alexander

YouTube - Honda Ridgeline on the dyno

I have seen the video. I am curious as to what the actual baseline was... I mean you claim that it was 204hp/205tq, right, so how about an overlay comparison for before and after?

Also, it says 238.7hp/218tq and after the video you say there is a gain of 50hp/25tq... My math says otherwise. I do feel that 34hp/13tq is a good gain especially at the wheels, reguardless. Was the before and after done on the same day? Were the conditions similliar?

I would also like to know what else was done on this day to make those gains?

[tschroer]

OK. Back to the original topic of......headers. I'm not interested in your personal opinions concerning pollution or what is illegal where you live but would love some educated input concerning this idea.
Theoretically-if a person were to build "headers" without cats, bolt on an intermediate pipe (like the ATLP version), to a high flow aftermarket cat followed by cat-back system, would it screw with the computer?
Would the O2 sensors still work correctly or would they "throw a code" because of the cat deletion?
I am only looking for better performance through higher engine efficiency (you know-air in,air out). As was the case with my Buick Regal GS, some exhaust work and FIPK not only gave me more power but a 10% gain in fuel economy.
As for the engine running dangerously lean-wouldn't the computer make the necessary changes to ensure that wouldn't happen?
It would seem to me that more air in, efficiently; and more air out, more efficiently than the stock set-up would result in a more efficient running engine which would improve mileage. And besides, this "pig" could use 30 more horses under the hood anyway.

[avenger]

Originally Posted by djeaux

I'll admit to having not messed with headers in about 20 years. (I used to run 'em religiously on my vehicles in the pre-cat days.) One thing I always noticed was that I was taking off very heavy cast iron things & replacing them with much lighter pipes. I figured the last set of headers I installed (on a 360 c.i. Dodge) weighed less than half as much as ONE of the cast iron monsters I removed...

.
Ditto for me in the late 60's thru the early 80's with regard to the headers. Funny thing is I've still got a 40 year old Road Runner sitting in my garage. When I did a resto on it back in the mid 90's, the first thing I did was put those big ol' magnum exhaust manifolds back on it. I gotta admit, those were impressive looking stock manifolds (plus no leaks).

.

[alexander]

look you dont need to lose the cats to make more power, exactly the opposite but without them you will get a Check Engine Light. The option is to relocate them.

[typesfanatik]

the first company to sucessfully make a header with highflow cat will have agoldmine

ill buy one asap