Corvette Z06 Forum banner

1 - 14 of 14 Posts

·
Registered
Joined
·
396 Posts
Discussion Starter · #1 ·
I have an A4 coupe, and in addition to adding headers, I am looking at having the dealer install a camshaft.

My brother works at the dealer, and he told me if I buy GM's Hot-cam package and have the dealer install it, it won't void my extended warranty. However, the cam specs are as follows:

219/228 degrees duration @ 0.050" (I/E)
0.525"/0.525" Lift (I/E)
112 degrees lobe separation
RPM Range: 2200 - 6500 rpm

Wouldn't this cam require custom computer tuning with an automatic transmission? Do dealers have the equipment necessary to tune the computer? Also, with an rpm range of 2200-6500, wouldn't idle and driveability be negativley affected with a stock torque convertor?

I actually would like to keep my stock convertor and stall speed. I think my car idles smewhere around 800-900 rpm. So I was looking at some smaller cams on T-Byrne's website:

COMPCAMS:
54-408-11 Very strong torque, good mileage. Noticeable increase over stock cam. 206 / 212 .515 .522 @ 112

54-412-11 Good torque and very strong mid-range power. Good performance cam. 212 / 218 .522 .529 @ 114

LUNATI:
212 / 216 .471 .507 1500-4500rpm

212 / 221 .510 .510 1800-4800rpm

I noticed that the smaller cams generally have either 112 or 114 degrees Lobe separation. What is the difference between 112 and 114?

Which cam should I go with for good performance while maintaining good idle and driveability, and not having to change my torque convertor?
 

·
Registered
Joined
·
17,744 Posts
It will void your warranty unless your Dealer is willing to look the other way. To take full advantage of your cam, a Dyno tune is necessary. :cheers:
 

·
Registered
Joined
·
396 Posts
Discussion Starter · #3 ·
IT L GO said:
It will void your warranty unless your Dealer is willing to look the other way. To take full advantage of your cam, a Dyno tune is necessary. :cheers:
Luckily the head mechanic is willing to look the other way, as long as he does the install and it is a GM performance part. I'm sure that he'll agree to one of the other cams I listed, even though they're not GM parts, since they are less aggressive. I'm more than willing to tune the car, but I would still like get a cam with very stock-like qualities. Does anyone have any idea about the 4 cams I listed? How much hp they will add, how much they will affect driveability?
 

·
Registered
Joined
·
17,744 Posts
That's what this World needs is more MOD friendly Dealer's :thumb:
 

·
Registered
Joined
·
2,127 Posts
That GM cam will not cause much issue at idle with the stock converter.
I think it is smaller than a stock ZO6 cam. Not much tuning needed but I would advise it. No GM dealers I know of can tune.
 

·
Registered
Joined
·
396 Posts
Discussion Starter · #6 ·
IT L GO said:
That's what this World needs is more MOD friendly Dealer's :thumb:
Yep. Hopefully a Honda dealership won't come along and offer my brother a better job or salary. :eek2:
 

·
Registered
Joined
·
396 Posts
Discussion Starter · #7 ·
22655TD said:
That GM cam will not cause much issue at idle with the stock converter.
I think it is smaller than a stock ZO6 cam. Not much tuning needed but I would advise it. No GM dealers I know of can tune.
If I remember correctly, the specs on a Z06 cam are:

204/218 degrees (I/E) 117.5 lsa

Its the rpm range of the hotcam that worries me, 2200-6500 rpm. I do most of my driving between 1200 and 2600 rpm. (Automatic transmission)
 

·
Registered
Joined
·
2,127 Posts
That is the power range. I have a cam that is 4000-7000 rpm but I drive it around town at 2400 rpm.
 

·
Moderator
Joined
·
21,378 Posts
I wouldn't waist my money on a hotcam. It's an outdated design. You can get a much better cam with better mannerisms that will make more power such as a 224/224. Heck, I think a LS6 cam (405HP) would be a better choice than a hotcam.
 

·
Registered
Joined
·
396 Posts
Discussion Starter · #11 ·
22655TD said:
That is the power range. I have a cam that is 4000-7000 rpm but I drive it around town at 2400 rpm.
What does the power range mean? Is this where the cam outperforms the stock cam? Did you lose anything at engine speeds under 4000rpm?

Also, If I go with one of these cams, what would my idle speed be changed to with programming? Would my cruising speeds be affected much? Crusing around town under 60mph I generally hang around 1500-1600 rpms, and the Bullet exhaust is completely bearable. I don't want to have to cruise around under 60mph at 2000rpm or over. On the highway at speeds over 70mph, I could care less how loud the car gets.
 

·
Registered
Joined
·
396 Posts
Discussion Starter · #12 ·
Grim Reaper said:
This cam has a lobe separation of 112. I noticed they have 2 stealth cams with similar intake/exhaust numbers but lobe separations of 115 and 116. What does lobe separation affect? How would the mannerisms of the stealth cams differ from the C2?
 

·
Registered
Joined
·
407 Posts
Sent you a pm
 
1 - 14 of 14 Posts
Top