I am looking real hard at the 264 Megacam for my 327. One thing bothers me: Isky rates advertised at .007" open, .010" closed. I have no idea how to compare this to Crane' .004" numbers, or Comp's .006 numbers. I suspect this "264" cam is actually more like a 274 to 278 cam when compared using .004 numbers. Am I right?

The other thing that leads me to believe this is true, is that Isky says this cam is OK to 10.5:1, CR, which seems very high for a short cam.

Also has anyone here ever used the 264 Megacam?

call isky and ask, then call crane and ask

Originally posted by novadude:
I am looking real hard at the 264 Megacam for my 327. One thing bothers me: Isky rates advertised at .007" open, .010" closed. I have no idea how to compare this to Crane' .004" numbers, or Comp's .006 numbers. I suspect this "264" cam is actually more like a 274 to 278 cam when compared using .004 numbers. Am I right?

The other thing that leads me to believe this is true, is that Isky says this cam is OK to 10.5:1, CR, which seems very high for a short cam.

Also has anyone here ever used the 264 Megacam? = Maybe you will get lucky & Harold will drop in & answer this correctly but here is my best shot ;)

First, I wasn't aware that Isky rated their hyd cams at .007/.010 but being a curious sort,, I will check next week assuming I can remember :D
Is this at the cam or at the valve?

If so & it is at the valve, it is a fair representation of what a hyd cam will see.
My understanding is, at the valve .006 opening & .012 closing is very close to what a hyd will see with a 1.5 rocker.
This is .004/ .008 at the cam, again with 1,5 rockers
If the numbers are at the cam you & assuming about .001/ degree opening rate which is only a assumption as I do not know what they are using for opening & closing velocity then the Isky would be 1 degree on the intake side & 4 degrees on the exhaust side shorter than a Comp at the cam.
If it is at the valve the numbers would be .0044/.0067 at the cam & compared to a Comp again assuming .001/deg the Isky would be about 1.5 degrees longer opening & about .7 shorter closing.

As Nick suggested, ( Hi Nick graemlins/waving.gif ) this is a question for the cam designers which would be Ron at Isky.
Don't have a clue who you would ask at Comp as you can read the same catalog the guys on the "help" line are using ;)
I feel it really depends on who you happen to get on the phone when you call as to the reliability of the information you receive.

BTW, I believe Crane does not use the same .004 for all their cams but again I don't know this for a fact.

I have not used the 264 Isky in a 10.0 engine but it seems to work very well in a mild 9.0-9.5 350.

Thanks. So Ron takes calls? My experience with "tech lines" has been less than satisfactory. What is teh power band like in a 9:1-9.5:1 350 (You said you have used this cam in these engines)? Idle quality?

I am looking at this cam for a 9.3:1 327, shooting for a flat midrange torque curve, with a HP peak at 5000-5500. I like the 108 LCA, as I am thinking this will pick up the torque in the 2500-4500 range.

Nothing to offer regarding Isky or any other cam grinders seat timing reference, but the best practice of standardization I can offer is the Factory 327/350 Hp motors of the 60's. These were 11.0/1 Cr motors with the good (for the day) Chev heads w/ 2.02/1.6 valves. Cam was the Chev 3863151 222/222 @ .050, .447/.447 on 114LCA. Peak HP cam at 5800 RPM, dictated mostly by the 222@ .050. I think for any carbureted 327 motor this is always a good starting point of reference. The factory cams had notoriously long/slow seat durations that combined with the wide lobe centers really tamed the compression down. The 264 Mega at 214 @ .050 and with a much shorter seat timing would work well in a lower compression 327. I would expect the 214 @ .050 to bring peak HP in around 5300 or so. The 327/350 motors were offered in a stick car only. The 222 @ .050 in a 327 was a little lazy below 2000 in an automatic car. (We didn't have a wide selection of available converters in those days).

Hope this helps.

I have talked with Ron a few times... It's best to call him after 1:30 PM or so.... You'll have to ask for him and the recptionist may ask for your name...
But he useually will take the calls if he can.

Originally posted by 69LS1:
I have talked with Ron a few times... It's best to call him after 1:30 PM or so.... You'll have to ask for him and the recptionist may ask for your name...
But he useually will take the calls if he can. =

Correct but don't be offended if you can't get him the first time. :(

He is a very busy person but yes you can talk with him or his brother Richard any time you wish if they are available.
Hell, you could probably talk to Ed if he was there smile.gif
Ron doesn't get in until after 1:30 pacific & will usually call me back in the evening at home on busy days.

This is part of the reason I recommend & use Isky cams most of the time.
They are still a family owned company that not only grinds all there own cams & every part they sell is 100% USA, they also seem to at least act like the customer is important to them but again it is a small company & sometimes it takes a few tries as Ron does have a "couple" of other things to do there ;)
There are other guys in Tech that are very good & easier to get through to but some questions are best answered or at least confirmed by the designer.

Novadude,
To your question about how the 264 works in a 9.0 327/350, I don't use it a lot but it seems to work very well.

Never dynoed it but it is makes good torque, sounds good & I think your assumptions are pretty much right on in a 327.

.007 & .01
I,m kinda curious 2.


http://www.iskycams.com/timingchart.php?product_number=201264&timing_chart_id=93