Cam rev range CC306
02-20-2009, 09:35 PM
#21
6700 or 6800 with a cc306...ive had many lt1 crs and ive spun some bearings...most common problem i have found is starvation...i always run 6 qts and a truck filter..if you watch most every lt1 with 5 qts in first gear sometimes in second the oil pressure will drop from being pushed back in the pan or just plain sucking the pan dry...ive beat the **** outa some stock bottom ends
02-20-2009, 10:17 PM
#23
^my bad cc306 actually peaks a little later than the gm847, I imagined it would be roughly the same due to similar size but it seems the gm847 actually peaks about 3-400rpm earlier, this is what I get for going off memory 
actually saw your dyno graph on another forum
where as here is a gm847, which is closer to what I was talking about
actually saw your dyno graph on another forum
where as here is a gm847, which is closer to what I was talking about
Last edited by myltwon; 02-20-2009 at 10:23 PM.
02-21-2009, 09:22 AM
#25
Like I said in the other thread, people do things wrong, that does not prove the rpm range for a cam, just the rpm range for it as it was setup in that car.
Some guys swear the XFI 292 peaks in the low 6000s but another guy has a graph of it not yet peaked when the pcm ran out of rpms up over 7000rpms.
People also like to ignore critical details, ported heads, different intakes, header seletion all tweak rpm range, then there are the guys who try and compare without regard to displacement.
On a properly setup 350/355 car a mid 220s intake duration cam is going to peak over 6000rpms and need to rev several hundred rpms beyond that for best performance.
Start choking things with bad intake or exhaust, use bad programming, insufficient or worn out springs, missadjusted valvetrain etc. can all screw that up and examples of that just prove a problem with the car, not the rpm range for the cam.
Some guys swear the XFI 292 peaks in the low 6000s but another guy has a graph of it not yet peaked when the pcm ran out of rpms up over 7000rpms.
People also like to ignore critical details, ported heads, different intakes, header seletion all tweak rpm range, then there are the guys who try and compare without regard to displacement.
On a properly setup 350/355 car a mid 220s intake duration cam is going to peak over 6000rpms and need to rev several hundred rpms beyond that for best performance.
Start choking things with bad intake or exhaust, use bad programming, insufficient or worn out springs, missadjusted valvetrain etc. can all screw that up and examples of that just prove a problem with the car, not the rpm range for the cam.
02-23-2009, 09:47 PM
#26
my old 94 z28 w/ forged 355 and ported heads had the 306 it pulled from about 3000 all the way to 6800 rpms..
I would not take a hydraulic cam any higher than 6800 personally
I would not take a hydraulic cam any higher than 6800 personally
02-24-2009, 01:09 AM
#29
i dont think its rod bolts...its most of the time detonation or oil starvation that kills them IMO...i run ph1218 think its a ac delco filter...6 qts of straight 30 weight valvolive round the year...no bearing problems so far...
i highly reccomend running 6 qts in any lt1
i highly reccomend running 6 qts in any lt1
