[Z06] Dual Filter Intake
07-25-2004, 09:45 AM
#21
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Originally Posted by rbartick
When were the before and after dyno runs done? Did you do a baseline pull, swap the airbox while on the dyno, and then do another run with the new airbox? If so then you are not seeing the real picture. You may have been running with a temporary lean condition. Head back to the dyno after driving about 100 miles and PCM learning might take most this new power away.
Can I get any help on this out there? Thanks.
07-25-2004, 11:16 AM
#22
Le Mans Master
Most aftermarket airboxes cause inaccurate MAF readings when used with a screenless MAF car like an 02+ Z06. This usually results in a temporary lean condition. After about 100 miles of PCM learning this temporary lean condition normally goes away.
Doing a baseline dyno run, bolting on a new airbox while still on the dyno, and then doing an immediate "after" run is an extremely inaccurate way to test a part. Your HP gain may have been a result of the temporary lean condition and not the airbox. The only way to know for sure would be to do a follow-up dyno run after PCM learning completes (about 100 miles, 10 or so key cycles).
Doing a baseline dyno run, bolting on a new airbox while still on the dyno, and then doing an immediate "after" run is an extremely inaccurate way to test a part. Your HP gain may have been a result of the temporary lean condition and not the airbox. The only way to know for sure would be to do a follow-up dyno run after PCM learning completes (about 100 miles, 10 or so key cycles).
07-25-2004, 11:40 AM
#23
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Originally Posted by THEDVS1
Just checked the Callaway Cars website, and the C5 Honker intake is now CARB legal. That gives us Cali guys more choice for an intake if we want to make sure our cars smog OK. They're claiming 21 bhp and 3 tenths in the quarter mile on an '03 Z for the intake and their exhaust (Power Group 1). I also like the fact that it eliminates the air bridge and matches the C6 design. Looks like a major improvement over the admittedly lousy C5 intake.
They just released their Power Groups and Power Group III (which builds upon groups I & II) is 49 state legal with Cali. coming soon
There is a road test review of their (Power Group equipped) Z06 in the next issue of Corvette Enthusiast Magazine (hits the stands in a few weeks)
07-25-2004, 11:44 AM
#24
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Originally Posted by rbartick
Most aftermarket airboxes cause inaccurate MAF readings when used with a screenless MAF car like an 02+ Z06. This usually results in a temporary lean condition. After about 100 miles of PCM learning this temporary lean condition normally goes away.
Doing a baseline dyno run, bolting on a new airbox while still on the dyno, and then doing an immediate "after" run is an extremely inaccurate way to test a part. Your HP gain may have been a result of the temporary lean condition and not the airbox. The only way to know for sure would be to do a follow-up dyno run after PCM learning completes (about 100 miles, 10 or so key cycles).
Doing a baseline dyno run, bolting on a new airbox while still on the dyno, and then doing an immediate "after" run is an extremely inaccurate way to test a part. Your HP gain may have been a result of the temporary lean condition and not the airbox. The only way to know for sure would be to do a follow-up dyno run after PCM learning completes (about 100 miles, 10 or so key cycles).
07-25-2004, 11:52 AM
#25
Le Mans Master
Originally Posted by MaverickC5
Thanks, I think "I got it". If I notice a decrease in HP they can program back in the lean conditions with a tune?
07-25-2004, 12:26 PM
#26
Get Some!
Originally Posted by rbartick
You probably will not notice a decrease in performance. It would be very difficult to detect a 10 HP loss or gain on a 400 HP car. Yes they can program your car to get the most out of your current setup.
07-25-2004, 06:51 PM
#27
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You are the first that I have read where the lean codes disappear. Many others who are having lean codes keep on having them. I have not purhcased an intake yet because I am feerful of the lean codes and that I will dmaage the engine.
