sorry. can't find any info on the isky about timing. (when exactly open and close the intake/exahsut valves). So i can't set it up
they only give duration which doesn't tell when exactly

 

Too bad The only info I have is the one you can find online... Is there a way you can approximate it? Or guess? I would love to see the curve vs the Performer RPM.

Thanks anyway

 

put it that way: i made too curves last night with the compcams xe256 (31-234-3) and the perfromer rpm. and for what you want the compcams would be way better.
Even has less lift (4.77 ish as opposed to 5.00 ish)
I'll upload it tonight when back home (aka 8 hours)

Kalli

 

Cannot wait thanks

 

I still say to call the company. Let them tell you whats going to be best for your usage. Call 2 or 3 places, get their recommendations and then post the results here to help you decide between them.

 

here's the results:
what i believe to be your engine, stock cam, edl performer and compcams xe256h.
I'm not an engine builder so yes, phone around, see what the cam companies recommend for your engine, transmission and gearing (how would i know better than someone who builds them).
But the compcam (the high torque) looks best from all three since you want to spin to 5500 only

since the attachm,ents are resized to **** here, the highest torque is xe256, the middle torque the edl rpm and the lowest the stock
obviously the lowest HP (red) is stock, middle HP is xe256 and high HP is edl

edl has more HP than xe256 at 6000, but you shouldn't be there. at 5500 they're the same and before that the xe256 is the clear winner.

that's all based on 289, 9:5 compression, 600cfm, high flow dual plane, edelbrocker performer heads with 1.9/1.6 valves

But i cannot guarntee what heads you have or clearance so I'd stick with what your new good reputation engine builder says. still don't understand the isky argument

 

Thank you very much

Can you attach it in a bigger resolution please?

 

Did not see that you mentioned the resolution here, I just sent you a PM.

The isky argument is just that just they have been working with them forever. With the kind of information that you are providing I will have an hedge to discuss without getting him upset. I am pretty sure that you understand my position, I want something well built and because I cannot do it myself I rely on someone else that I want happy

 

Isky used to make drag race cams waaaay back when. That's what they do. Lots of shops have 'been working with them forever' simply because they've been around forever. that doesn't mean they're the best option for you.

Isky's grinds tend to have really short LSA's, which increases valve overlap, bumps up the rpm range of the power band, and narrows it at the same time. Drag race cars like to make gobs of power at really high rpm's where they keep the motor operating down the strip. Works great on the strip, but not so well on the street. They sound great at idle, but don't really wake up until you rev the motor up past 3k.

Street cars like a broader power band, one where you have usable power across a wide rpm range. The idea here is to get the largest area under the torque curve, not the most peak power. This is basically Comp Cams' motto. You're further restricted by your stock bottom end, which prevents you from really winding the motor up to take advantage of a cam with more valve overlap. Comp Cams and Lunati have more off the shelf grinds for your type of motor than Isky or Edelbrock, so you can pick something that best suits your car and driving style.

 

well explained :-)
Remi check email, sent the full resolution picture there. but you even get the ideqa from that minifile

uploaded as well now.


remi1-what you have (see on left)
remi2-same with xe256
remi3-edl perf rpm cam

dont take the numbers too serriously, it's just to show the difference between the cams