aem intake
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Joined: Mar 2004
Posts: 7,698
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From: Tracy, CA
Originally Posted by kilrb
Regarding the dyno, I'm confused... Why would the Injen cause a dip in low torque for the TL only? When I browsed the dyno charts at Injen, none of the other cars had the same issue with a significant drop in low torque, like the TL dyno showed. Is there any possibility the decrease is the result of how much throttle was applied at the start of the dyno run? In other words, is it possible the operator rolled into the throttle more smoothly on the "after" run? I don't know much about how they initiate dyno runs, so sorry if this is a stupid question.
I had a cold-air intake on my Z-28, and it seemed to improve the torque all along the rpm range.
I had a cold-air intake on my Z-28, and it seemed to improve the torque all along the rpm range.
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Joined: Mar 2004
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From: Stockton, CA
Something to think about...
I'm not so sure that a dyno comparison of aftermarket CAI's to the factory CAI is completely fair and accurate. I do not believe the benefits of the factory cold air system will be fully realized on a chassis dyno. Why? The car is making full power runs, drawing air from the top of the cowl area, with relatively little cooling airflow through there (compared to a moving car). The aftermarket intakes are probably drawing much cooler air when stationary. I think this could account for at least some of the power differences that they are advertising. I would like to see intake air temp and coolant temp. data included with comparisons to understand where the power is coming from. I would also like to see if IAT changes when the car is moving vs. on the dyno. If Ingen is 10 degrees cooler on the dyno but only 2 degrees cooler in a moving car, that clearly accounts for some of the power difference.
I'm not knocking CAI's because they clearly produce more power in many applications. On the TL, the aftermarket CAI's are probably less restrictive and this probably accounts for at least some of the gains. I just want all the facts before I consider spending money on one.
I'm not so sure that a dyno comparison of aftermarket CAI's to the factory CAI is completely fair and accurate. I do not believe the benefits of the factory cold air system will be fully realized on a chassis dyno. Why? The car is making full power runs, drawing air from the top of the cowl area, with relatively little cooling airflow through there (compared to a moving car). The aftermarket intakes are probably drawing much cooler air when stationary. I think this could account for at least some of the power differences that they are advertising. I would like to see intake air temp and coolant temp. data included with comparisons to understand where the power is coming from. I would also like to see if IAT changes when the car is moving vs. on the dyno. If Ingen is 10 degrees cooler on the dyno but only 2 degrees cooler in a moving car, that clearly accounts for some of the power difference.
I'm not knocking CAI's because they clearly produce more power in many applications. On the TL, the aftermarket CAI's are probably less restrictive and this probably accounts for at least some of the gains. I just want all the facts before I consider spending money on one.
Racer
Joined: Jul 2003
Posts: 456
Likes: 0
From: la
That dyno was the best run of them all.. It produced the best numbers throughout the band, and was the final product as well. They tested fitted almost 6 different types of angles and filters on the car before they actually got numbers they were happy with.
What's a TL?
Joined: Nov 2003
Posts: 1,710
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From: Porter Ranch, CA
Originally Posted by WlcTL
on the websites i can find a cai from injen made specifically for the 04 tl but i cant for aem is it because its not out for sale yet?
Instructor
Joined: Dec 2003
Posts: 229
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From: Kansas City
What's the concensus on Comptech's ice box? The setup looks like it draws air from outside the engine bay. I didn't see an application for the TL, but it looked like they got good numbers on the older CL's. And they are cheaper.
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