[Z06] FLP Headers installed but ......
Thread Starter
Intermediate
Joined: Feb 2002
Posts: 47
Likes: 0
From: Cranston RI
FLP Headers installed but ......
Just had my FLP headers installed yesterday. The car sounds much better and it definitely pulls a lot harder. But it only dynoed at 357 rwhp on a dynojet. The car now has 3400 miles on it. I originally had the car dynoed at 1500 miles on the same dyno and it pulled 352 rwhp. Since then I added the donaldson blackwing and powerduct and the headers. Can anyone tell me what is going on? :confused: Based on what I've seen, I figure I should be hitting around 370 rwhp. Should I let the computer do a relearn for a few hundred miles and then dyno again? The other thing I noticed is the valve train noise appears to be louder. I know its normal for these cars to have a tapping noise at low rpms from the valve train, but does anyone else with FLPs notice that it got louder? Any input is appreciated.
Race Director
Joined: Aug 2000
Posts: 11,188
Likes: 0
From: Scarborough ME
Re: FLP Headers installed but ...... (QUIKSLVR02)
The idle relearn may help. You may also find the car is running lean now that you've got the Blackwing installed. Beyond that I don't know why the HP might be so low but I'll be interested to see what the reason is.
Instructor
Joined: Aug 2000
Posts: 175
Likes: 0
From: New Orleans Area LA
Re: FLP Headers installed but ...... (QUIKSLVR02)
I can't remember which tuner I spoke to some time back, but whoever it was indicated that if I were to add headers to my already modded Z06, Blackwing and Carbon Fiber MAG, I would need to have the computer reprogrammed to realize the benefit of the headers. So whatever that is worth I will pass it on.
Safety Car
Joined: Oct 1999
Posts: 3,514
Likes: 0
Re: FLP Headers installed but ...... (MY 2002 Z06)
First the 02 Z06's don't benefit as much from longtubes as earlier Z's or thge LS1. This has been proven many times. Having said that because the MAF is different and the fuel tables are different from the 01 Z's you need to take a look at your A/F ratios when you dyno. I deally they should be 12.6 to .7 for maximum power. If you have a typical 2002 Z06 it is running at 10:1 which is way too rich. This is because you leaned it out by adding more air and made it even worse by getting the added air out faster. The computer compensates with the long term fuel trims and uses those LTFT for the full throttle program and it ends up being really rich.
So bottom line is drive it for about 50 miles, run Atap and look at the data (LTFT, timimg KR etc) and if the numbers are out of whack then get a MAFT to adjust. Once the LTFT's are near zero redyno with a wideband o2 sensor and adjust the WOT A/F ratios. You should be able to see another 10-15HP I bet.
Joe
So bottom line is drive it for about 50 miles, run Atap and look at the data (LTFT, timimg KR etc) and if the numbers are out of whack then get a MAFT to adjust. Once the LTFT's are near zero redyno with a wideband o2 sensor and adjust the WOT A/F ratios. You should be able to see another 10-15HP I bet.
Joe
Team Owner
Joined: Jun 2001
Posts: 26,714
Likes: 344
From: Houston, TX
Re: FLP Headers installed but ...... (QUIKSLVR02)
A friend of mine - rschiltz, went from 351 to 372 just adding those headers and pipes (with the supplied cats). He posted a couple of weeks ago if you want to do a search.
