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Old 07-08-2012, 12:39 AM   #29
MrDew
 
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Well, the boost drops but what happened with the power(if tuned properly)
makes me wonder why you would even put headers on If you need the pulley to make up the lost boost...
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Old 07-08-2012, 11:00 AM   #30
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as mentioned before, you can make more power with lower boost. Boost is only a measure of resistance/pressure in the intake system. It is not the same thing as CFM or amount of airflow.

Who cares if you have 20 psi of boost if the next guy makes more power with 10 psi because his engine intake and exhaust systems are that much more efficient. Besides, more boost means more heat, which also means less power.

The only reason to swap pulleys to maintain boost is because the motor can take it, and if it can take it ("it" meaning cylinder pressures), then why wouldn't you do it? More boost does mean more power as long as it isn't too much due to heat or engine durability.

Bottom line, headers make the system more efficient and you will still make more power even if there is a little less boost.
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Old 07-08-2012, 11:32 AM   #31
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Thanks for the reply!
I don't recall ever seeing a dynochart with before/after results with headers only on a sc car...
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Old 07-08-2012, 06:13 PM   #32
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I have SLP Long tubes with a pulley swap, tune and bigger injectors. Runs great and looks good too.
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Old 07-09-2012, 09:56 AM   #33
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I have SLP Long tubes with a pulley swap, tune and bigger injectors. Runs great and looks good too.
did you dyno the car with everything done ?
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Old 07-09-2012, 01:40 PM   #34
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There are other threads about my results so I don't want to go through it again, but I will get it dyno'd again locally to see what I have.

Wish I could give you a better answer but there was a lot of confusion over the dyno chart I posted and I didn't want to go back and bother SLP about it since it doesn't really matter to me. I can feel the difference and I love the sound.

As soon as I get to a local dyno day event, I will post the results.
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Old 07-10-2012, 02:37 PM   #35
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I have Stainless Works on my ZL1. . . waiting for break in to be complete to do a full tune.
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Old 07-10-2012, 08:54 PM   #36
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Anybody running long tubes without cats or mufflers? I really want to know how that sounds on a V8 Camaro. :P
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Old 07-10-2012, 09:32 PM   #37
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Anybody running long tubes without cats or mufflers? I really want to know how that sounds on a V8 Camaro. :P
My ZL1 with Long Tube headers.
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Old 07-11-2012, 07:24 AM   #38
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From our testing, LT's are worth about 13-15RWHP with a .6psi drop in boost pressure......worth it in every way when adding a QUALITY set of LT's like Stainless Works or Kooks
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Old 07-11-2012, 10:10 AM   #39
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From our testing, LT's are worth about 13-15RWHP with a .6psi drop in boost pressure......worth it in every way when adding a QUALITY set of LT's like Stainless Works or Kooks
Nice mod! A bit more power. Less boost - less heat. Except that the LT's will render your ZL1 emissions illegal :\
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Old 07-11-2012, 10:49 AM   #40
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Nice mod! A bit more power. Less boost - less heat. Except that the LT's will render your ZL1 emissions illegal :\
only in nazi states like MD and CA.... man i lived in MD for 3 years with an 850 HP Z06 and it was HELL!!! lol. nothing legal about the car of course, but totally fine in texas.
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Old 07-11-2012, 11:02 AM   #41
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rmyers, Sounds awesome!! What other mods do you have?
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Old 07-11-2012, 11:03 AM   #42
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Nice mod! A bit more power. Less boost - less heat. Except that the LT's will render your ZL1 emissions illegal :\
Our Kooks LT headers with EPA Certified Green Cats are 49 State Legal and will not set any codes!! IN STOCK!!
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