another cam question
11-18-2006, 08:09 PM
#1
Melting Slicks
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another cam question
A few on this board have stated that there are cams out there that are very streetable, idle well and make more power though out the powerband. My question simply is why hasnt the factory used them as OE if they seem to be better in every regard th the original cam?
11-18-2006, 10:25 PM
#4
Melting Slicks
remember, the factory has to meet fuel mileage and emission requirements. our wonderful government at work. the tuners and cam grinders don"t have to meet these requirements..........crancky
11-19-2006, 12:38 AM
#5
Instructor
I would not say there was any BS involved here.Its apparent that these statements lead some to assume there is just a power increase with there cams and GM just missed it. Cranky is correct as to some of the effects in a cam change, along with many more that would affect GMs objectives. I think the terms "idle well" and "streetable" should be more accurately described as to not confuse or be misinterpreted by others. We surely would not want an A4 owner with 2.73s to make only a cam change and not expect to take a bite out of the steering wheel at sent off. Nothing for nothing still works.
11-19-2006, 11:10 AM
#7
Drifting
Yeah, I don't get it either.
GM designs their cams to satisfy a number of different objectives, such as emissions compliance, fuel economy, reliability, smooth idle, street manners, etc. They do make other high-performance cams, such as the Hot Cam and the ASA cam, but they are purpose-built.
Every cam choice involves some sort of a trade-off. Even the cams that I mentioned that offer a relatively smooth idle, power increase, etc. have a downside, such as reduced life for the valvesprings, and the need for more expensive hardened pushrods.
TANSTAAFL --- There Ain't No Such Thing As A Free Lunch.
GM designs their cams to satisfy a number of different objectives, such as emissions compliance, fuel economy, reliability, smooth idle, street manners, etc. They do make other high-performance cams, such as the Hot Cam and the ASA cam, but they are purpose-built.
Every cam choice involves some sort of a trade-off. Even the cams that I mentioned that offer a relatively smooth idle, power increase, etc. have a downside, such as reduced life for the valvesprings, and the need for more expensive hardened pushrods.
TANSTAAFL --- There Ain't No Such Thing As A Free Lunch.
And yes there are many longevetty issues.
11-19-2006, 03:45 PM
#11
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Originally Posted by HITMAN99
Yeah, I don't get it either.
GM designs their cams to satisfy a number of different objectives, such as emissions compliance, fuel economy, reliability, smooth idle, street manners, etc. They do make other high-performance cams, such as the Hot Cam and the ASA cam, but they are purpose-built.
Every cam choice involves some sort of a trade-off. Even the cams that I mentioned that offer a relatively smooth idle, power increase, etc. have a downside, such as reduced life for the valvesprings, and the need for more expensive hardened pushrods.
TANSTAAFL --- There Ain't No Such Thing As A Free Lunch.
GM designs their cams to satisfy a number of different objectives, such as emissions compliance, fuel economy, reliability, smooth idle, street manners, etc. They do make other high-performance cams, such as the Hot Cam and the ASA cam, but they are purpose-built.
Every cam choice involves some sort of a trade-off. Even the cams that I mentioned that offer a relatively smooth idle, power increase, etc. have a downside, such as reduced life for the valvesprings, and the need for more expensive hardened pushrods.
TANSTAAFL --- There Ain't No Such Thing As A Free Lunch.
also for those who dont know, the cam on the new Z is the third cam GM used to get the power DOWN to 505.
cam guide @ http://ls1tech.com/forums/showthread.php?t=327734