I have an 89' Trans Am L98 Ported polished heads, Intake matched, ported polished runners/plenum/intake, 1 5/8 inch headers into a 96 trans Am Cat back, no cats, Ported MAF, no screens, K/N air filter, baffles removed from air housing, 1:6:1 Proform super narrow Full roller rockers, new stock lifters, new pushrods(stock) (I have access to prom burning equipment, Now, what i need to know, for people who have aftermarket cams, I want a lil bit of lope, I want to be able to hear it at an idle, but i dont want to sacrifice a lot of power for it, mabey a lil on the low end(obviously) doesnt bother me.... not to much though, what i would like is advice on specific cam grinds, w/ or w/o part numbers as long as i can find it....Anyone who has an aftermarket cam, a lil more on the extreem end with sound files would be greatly appreciated, thanks for the help and time in advance Matt Manglos

 

Since you're running a MAF setup, you might be able to get a little more lope than a MAP system. So basically to achieve more lope, you're gonna need a lower LSA. Since you still have a computer, I wouldn't go less than 112* when getting up into the 220 and above durations. Remember that the LSA plays the biggest part in the idle, not the duration (to a certain extent).

 

Look at the Comp "305 and "306" grinds. They're hydro rollers designed for TPI cars with modified computers.

 

Iroc 22 whats your cam sound like? and even though you probably did your cam and heads at the same time pretty noticable.

 

It actually has a pretty noctiable lope at idle. It's still got the stock chip and it's running very rich. I really like the power range of this cam. It's advertised at 1000-5000rpm, but it pulls right off idle to 5500 very strong and can hit 63-6500rpm tops.

 

I'm running the Comp Extreme 218/224 .496/.502 112 LSA cam I was running the stock chip and it was running great. I am now running a custom chip thats almost the same as the stock. with the stock chip i was idleing around 550 and 500 in drive. a little low but the car drove great.

 

Mkos, what does your car idle like, again i do want the lope, but not so much that i lose all low end, and have no brakes.... then again brakes arnt too much of a problem as i do have a vac can.

 

its a noticable idle and I 'm getting 13-14in of vacume I do however have no power under about 2000. After that it takes off.

 

Another thing to concider is driveability, when going with a lopy cam. May cause some bucking about 25 to 30 mph if you have a tall gear. I had a 342 in mine for about a month while building the 10 bolt I'm running now. Didn't care for the 342, had to run in second gear in town. I still use my airconditioner though. I like the xe268 comp cam, has a nice lopy idle, and power to 6000.