Testing my new headers

[wproctor411]

Any vacuum, air intake, or exhaust leaks?

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[Tommy V]

Any vacuum, air intake, or exhaust leaks?

Did u have to use 02 ext for ur headers,if so i would check them out real good.

 

[stoli]

Well I got there before Sam got there so I made a few passes on Bamas new tune ..No good , best was 12.25 @ 111 ... Sam got there and loaded his tune and no help .. Two more runs and the best of 12.50 @ 109 .. This is the same tune Sam ran 11.40s on ... So it's not in the tune ...Not much left to do other than get it over to Sam and put it on the dyno and see what it's doing or not doing .. I'm worn out and sick over this hole problem ..Hard to believe a set of headers would cause this much of a problem ..:rant:

It sounds like the same thing I (and others) experienced early on after adding headers. Do you also experience 'flat spots' around 3-4k when under light throttle in 4th and 5th?. If so, it may be the same issue with torque management that led me to switch from SCT to the Hyperbox from Lund. That said, I haven't broken 12.3 yet myself, but I'm not on dr's either.

 

[smokinzx14r]

Any vacuum, air intake, or exhaust leaks?

No leaks of any type.

 

[smokinzx14r]

Did u have to use 02 ext for ur headers,if so i would check them out real good.

Had to use them for the front 02s .. They are plugged in a working ..

 

[smokinzx14r]

It sounds like the same thing I (and others) experienced early on after adding headers. Do you also experience 'flat spots' around 3-4k when under light throttle in 4th and 5th?. If so, it may be the same issue with torque management that led me to switch from SCT to the Hyperbox from Lund. That said, I haven't broken 12.3 yet myself, but I'm not on dr's either.

No flat spots ... Well not really true , the hole power band is flat ... :( Sams tune did not use the SCT ..

 

[smokinzx14r]

Going to check the Cats this weekend , They might be blocked ... At least I can rule that out before I get to Sams place and get it on the dyno ..

 

[Tommy V]

Had to use them for the front 02s .. They are plugged in a working ..

Yes the front 02s are what controls ur air/fuel,ive seen guys have problems with them before and the only real way to check is with a scan tool or a data log,but it looks like ur going that route next.I really dont think the cats could be clogged that fast.

 

[Mikeiscoo2]

man I better not have this problem when I get my ARH full exhaust in October. im going to hold off on my headers until its not 150 degrees here in florida.

 

[Need4Speed15]

Did you log any passes? If so is it knocking? Maybe false knock and its pulling a ton of timing? Bad gas and pulling timing?

After the install are the headers/mid pipe hitting the frame or steering shaft anywhere? That can cause false knock.

Weird problem...checking the cats is a good thing to do also.

 

[smokinzx14r]

man I better not have this problem when I get my ARH full exhaust in October. im going to hold off on my headers until its not 150 degrees here in florida.

I had the hole exhaust off today to reinstall my factory mufflers ..I had Roush axle backs so I had to cut the pipe to install them .. So I pulled the full system to make it easier to weld back on the stock mufflers .. The Cats are fine , no blockage .. Sam said he had seen them do that with in a few miles of driving ( cheap Cats from China ) . He said it would be a good idea to check them .. At least we can rule that out ...

I removed the Roush Mufflers because it was so damn loud , even Sam said it was way too loud :eyebulge:... They where fine with the stock headers but when I added the SW headers and hi flow cats it got so loud I could not stand it ... It sounds much better now with the stock mufflers ...

 

[smokinzx14r]

Did you log any passes? If so is it knocking? Maybe false knock and its pulling a ton of timing? Bad gas and pulling timing?

After the install are the headers/mid pipe hitting the frame or steering shaft anywhere? That can cause false knock.

Weird problem...checking the cats is a good thing to do also.

No logging .. This just happened Weds at the track ... Thursday I when to the track again with the tune Bama tune to give it a try .. Sam was meeting me there with his Map to load into car .. Next week it going on Sams dyno , so we should be able to locate the problem ..

The pipes have plenty of clearance , nothing hitting ... I had the hole exhaust system off today and everything looked good ..Nothing out of place and nothing touching anything ..

Gas for Weds night was shell 93 .... I added fresh 93 from a different shell on the way to the track Thursday night .. So I didn't think it's bad fuel ..

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