Buckhead Imports Performance in house headers = 40rwhp/38rwtq

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Sep 25, 2012 | 09:07 PM

#41

bfsgross

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Joined: Nov 2009

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From: NY

Hi Mike. I don't get how the power goes from 346 rwhp w/o cats to 306 rwhp before headers?

Sep 25, 2012 | 09:16 PM

#42

Michael Star

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Joined: Sep 2010

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From: Bowling Green, KY

Sorry I probably should have put it in order. Before headers was a baseline run with stock cats (as far as I can tell) and the factory exhaust manifolds.

Sep 25, 2012 | 11:54 PM

#43

avos

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Joined: Apr 2008

Posts: 3,616

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From: Europe

Quote:

Originally Posted by B.I.P.

Sure thing here you go Avos!
Attachment 24004

Thanks.

I can also see now why the base run was lower, you see where the mixture got richer, and where the power dropped, the relation is clear.

Can't judge for how much HP loss that would equate, probably somewhere between 10 and 20 or so.

The headers aren’t the cause of the mixture change, I’ll guess it was more related to different circumstances between the runs, or what do you think?

Sep 26, 2012 | 03:15 AM

#44

XJR-99

Senior Member

Joined: Nov 2011

Posts: 878

Likes: 324

From: Europe

Are those loud against the stock ones if cats and catback already changed?

Quote:

Originally Posted by B.I.P.

So here are the results with the cats installed, not bad. Minimal loss in power at redline, lost a few in torque under 3K rpm. Any questions please ask. Not bad with 200 cell cats.

-Tony

Attachment 24003

Sep 26, 2012 | 04:11 AM

#45

JagV8

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From: Yorkshire, England

One thing really strikes me about these guys: openness. Hooray!

Sep 26, 2012 | 06:25 AM

#46

bfsgross

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Joined: Nov 2009

Posts: 5,084

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From: NY

Ditto to XJR: What sound could we expect with say..hi-flow cats and a stock muffler? I'd understand it would be loud without a stock exhaust....

Sep 26, 2012 | 12:43 PM

#47

Spinall4

Senior Member

Joined: Jul 2012

Posts: 116

Likes: 14

From: Ogden, UT

Quote:

Originally Posted by The Chris X

The craftsmanship does look pretty dang good on those puppies. Like em!

The only thing about headers is the heat. Hopefully the factory shields are up to snuff, and any other parts in the general area that were not protected are now(?). With the looks of this install & quality of parts, I'd be confident that the intallers did take that into consideration.

Header wraps have pros/cons - I wrapped my stainless Borla header on my Jeep more to help keep my toes from frying on the floorpan (no carpet and the thermo mats still were not keeping it cool enough) than anything else, but I'd rather not wrap if i didn't have to do so.

You can also ceramic coat the headers inside and out.