new headers
Safety Car
Joined: Dec 2004
Posts: 3,565
Likes: 5
From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
drive it around for 300 miles or so, then dyno it again. you will need to let the computer adjust for the new characteristics. the car will 'tune' itself (to a degree), it's just gonna take a couple of trips and some mileage before the computer will make the proper adjustments. be careful when/if you get it tuned, check out your tuner carefully, find out all the afterward restrictions, i.e. computer is locked to that tune software. what is their policy for updates from gm, etc.
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 25
From: Austin Texas
My Dynotech 1 7/8" w/HiFlo cats gave me 15.5HP/15.4TQ peak gain with no tune.
349.9/346.4 w/mufflers only
365.4/361.8 w/headers
378.6/370.5 w/LPE CAI
All Dynojet 248, SAE corrected, smoothing 3. Still waiting to tune.
349.9/346.4 w/mufflers only
365.4/361.8 w/headers
378.6/370.5 w/LPE CAI
All Dynojet 248, SAE corrected, smoothing 3. Still waiting to tune.
1st Gear
Joined: Jan 2004
Posts: 1
Likes: 0
From: Lawrenceville NJ
The Melrose headers are kickass. I had about the same experience with th epower numbers, before tuning. C6s just don't respond to headers like C5s do. Everyone I know has had the same experience, REGARDLESS of header brand. We've also found that after driving the cars a few hundred miles and redynoing, the power comes up. If you have any doubts, take a look at the air/fuel ratios on the dyno charts. All the ones on "little burts" are pig rich. The chart for the LG headers shows a pretty big difference in before and after air fuel ratios. That only comes from tuning. and when you get the air/fuel ratios right, you get the big increase in power.
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Originally Posted by dfedfe1
The Melrose headers are kickass. I had about the same experience with th epower numbers, before tuning. C6s just don't respond to headers like C5s do. Everyone I know has had the same experience, REGARDLESS of header brand. We've also found that after driving the cars a few hundred miles and redynoing, the power comes up. If you have any doubts, take a look at the air/fuel ratios on the dyno charts. All the ones on "little burts" are pig rich. The chart for the LG headers shows a pretty big difference in before and after air fuel ratios. That only comes from tuning. and when you get the air/fuel ratios right, you get the big increase in power.
Thanks,
Glenn
Le Mans Master
Joined: Nov 2005
Posts: 6,344
Likes: 22
From: Alexandria VA
All LT look the same to me ...LONG TUBES..hehe
I have the dynatech ones on mine and I am taking it down to CAM in Durham to get tuned (Jeff Creech..>Da MAN)...we are going to do a pre tune and post tune run ...then a cam install and tune again...should have 3 dyno charts to show ya ..
I cant wait ... this stupid trip to Costa Rica for a week is slowing it down!!!
I have the dynatech ones on mine and I am taking it down to CAM in Durham to get tuned (Jeff Creech..>Da MAN)...we are going to do a pre tune and post tune run ...then a cam install and tune again...should have 3 dyno charts to show ya ..
I cant wait ... this stupid trip to Costa Rica for a week is slowing it down!!!
Race Director
Joined: Jan 2006
Posts: 18,396
Likes: 169
I just came from the Melrose Header website, and they're showing a C6 dyno sheet with a 35 hp gain with their headers and a CAI, which makes me wonder what the actual numbers for the headers alone could be. Aren't the CAI's worth 'bout 20 horses? But on a dyno, without the additional ram effect, who knows? Without real world, item specific dyno comparisions, I guess yousz pay yer money an' takez yer chances 
I'm so confused 
Whats the best CAI/Header combo bang fer yer buck? Which is best for outright horsepower gains, money be damned? I'm beginning to think that a Maggie SC and tune is the most economical dollar per horsepower I've seen. Plus, the Maggie site is offering free Kooks headers with a SC purchase this week. That runs 'bout $40 per hp, while headers and CAI average 'bout $70 per hp.
I'm so confused Whats the best CAI/Header combo bang fer yer buck? Which is best for outright horsepower gains, money be damned? I'm beginning to think that a Maggie SC and tune is the most economical dollar per horsepower I've seen. Plus, the Maggie site is offering free Kooks headers with a SC purchase this week. That runs 'bout $40 per hp, while headers and CAI average 'bout $70 per hp.
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Race Director
Joined: Dec 2005
Posts: 11,857
Likes: 107
From: God's Country, ID
Originally Posted by dfedfe1
The Melrose headers are kickass. I had about the same experience with th epower numbers, before tuning. C6s just don't respond to headers like C5s do. Everyone I know has had the same experience, REGARDLESS of header brand. We've also found that after driving the cars a few hundred miles and redynoing, the power comes up. If you have any doubts, take a look at the air/fuel ratios on the dyno charts. All the ones on "little burts" are pig rich. The chart for the LG headers shows a pretty big difference in before and after air fuel ratios. That only comes from tuning. and when you get the air/fuel ratios right, you get the big increase in power.
You are incorrect in saying the C6's don't respond to headers. My 2005 C6 picked-up a very noticeable amount of torque even prior to tune. When I put headers (LG's) on my C6 I gained 28hp/31tq without tune.
Drifting
Joined: Jan 2006
Posts: 1,560
Likes: 3
From: FNDA Beach Florida
I see HP at 379 and Torque at 382 on the posted chart and just about every other LG chart that has been posted in here. Those numbers are not headers installed alone for a 45-50hp gain either, no way, most likely headers, tune, CAI, cat back. I got 370/370 even with Melrose, Headers, Tune, Magnaflow cat back and with CAI on an A4 and thats how you say it just 10hp less and wont feel that in the SOTP either. Perfect Headers, zero issues with service or parts and $300 less than others out the door. I dont think 10hp is worth $300 no matter who makes them and you are not squeezing much more out of any stock C6 unless there is a cam, heads, intake or something else to increase flow done. Your not getting 35-40hp from headers and then the CAI claim of 20-25hp so and another 20-25 from cat back systems either. If the bs was true we would get 75-90hp with these mods and that aint happening I dont care what the dyno sheet says or how it is modified to suite the needs.
Collections Ban
Joined: Aug 2003
Posts: 331
Likes: 2
From: Name calling begins in the absence of fact and reason
According to GM techs the car has to be driven at least 88 miles with 15 starts and stops to re-learn, right now the car is simply confused. If the battery was not disconnected during install do that before you drive it. It also affects the learn parameters of how the car is driven so don't pu$$yfoot it during the process. Do this then re-dyno it.
Thanks Chris
Thanks Chris
Pro
Joined: Jan 2006
Posts: 615
Likes: 0
From: Boston MA
Originally Posted by melrose
According to GM techs the car has to be driven at least 88 miles with 15 starts and stops to re-learn, right now the car is simply confused. If the battery was not disconnected during install do that before you drive it. It also affects the learn parameters of how the car is driven so don't pu$$yfoot it during the process. Do this then re-dyno it.
Thanks Chris
Thanks Chris
Burning Brakes
Joined: Feb 2003
Posts: 1,008
Likes: 0
From: Tampa Fl
St. Jude Donor '07
Hi BL:
Did you get the X-pipe and mid-pipes form Melrose? I just called for pricing and they indicate that they've not sold them this way before?
I'm waiting for a price from them. Curious how you got the package?
Thanks.
Did you get the X-pipe and mid-pipes form Melrose? I just called for pricing and they indicate that they've not sold them this way before?
I'm waiting for a price from them. Curious how you got the package?
Thanks.
Originally Posted by BLWright
They are very well constructed. I too am interested in the results. My car dynoed stock with Bullets at 342/345. The next run will be Bullets, Stinger, Melrose LT's, and a tune. Here's a pic of my setup that will be going on soon. Waiting on tuner. 
Collections Ban
Joined: Aug 2003
Posts: 331
Likes: 2
From: Name calling begins in the absence of fact and reason
Originally Posted by Cavallo GT
Hi BL:
Did you get the X-pipe and mid-pipes form Melrose? I just called for pricing and they indicate that they've not sold them this way before?
I'm waiting for a price from them. Curious how you got the package?
Thanks.
Did you get the X-pipe and mid-pipes form Melrose? I just called for pricing and they indicate that they've not sold them this way before?
I'm waiting for a price from them. Curious how you got the package?
Thanks.
Thanks Chris