Cam Guru's: What about this one?? Look inside...
#41
I have a cam for sale that might work for you.
Comp Cam 228/232 .588/.595 111+1 It is on the XE-R lobes. It only has 600 miles on it. The only reason I took it out was that at idle, it shook the whole car. The idle sounds great and it really pulls. Predator says it is one of his favorite street/ strip cams.
My car made 431 rwhp and 400 rwtq with this cam, PRC 5.3L heads, headers, and all the bolt ons except 90/90 setup. Dyno graph is over in the dyno section under the title: PRC Stage 2.5 5.3L Heads 228 camshaft results. It was posted by Jason 98 TA , co owner of Texas Speed.
Comp Cam 228/232 .588/.595 111+1 It is on the XE-R lobes. It only has 600 miles on it. The only reason I took it out was that at idle, it shook the whole car. The idle sounds great and it really pulls. Predator says it is one of his favorite street/ strip cams.
My car made 431 rwhp and 400 rwtq with this cam, PRC 5.3L heads, headers, and all the bolt ons except 90/90 setup. Dyno graph is over in the dyno section under the title: PRC Stage 2.5 5.3L Heads 228 camshaft results. It was posted by Jason 98 TA , co owner of Texas Speed.
#42
Originally Posted by Patrick G
Maybe at peak hp, but your average hp difference (3000-6500) will be closer to 10-15 rwhp. The average hp is what will win you the races as your motor spend so little time at peak hp.
I swapped from a 234/238 114LSA +2 cam to a 223/227 110LSA +0 cam and picked up 35 lb ft of torque at 3000 rpm and lost 0 rwhp at peak. Needless to say, the car was 3 tenths quicker and 1 mph faster in the 1/4 mile. If you judged it soley by the peak numbers, you would have said the cam swap was a dumb move, but the AVERAGE power of the smaller cam KILLED the larger cam. Why? More DCR and better valve events.
I swapped from a 234/238 114LSA +2 cam to a 223/227 110LSA +0 cam and picked up 35 lb ft of torque at 3000 rpm and lost 0 rwhp at peak. Needless to say, the car was 3 tenths quicker and 1 mph faster in the 1/4 mile. If you judged it soley by the peak numbers, you would have said the cam swap was a dumb move, but the AVERAGE power of the smaller cam KILLED the larger cam. Why? More DCR and better valve events.
#43
10 Second Club
iTrader: (11)
NEED? No. But it will benefit from it across the board. The bigger cam will be better on the top end, regardless. DCR isn't the end-all of power. But it is the often overlooked component that makes idiots say that big cams don't drive good, and don't have much low end, and also makes people wonder why they didn't get enough guts out of their setup.
But yes, with earlier IVC, you're getting more DCR. Great if you race people at 2500 rpms. But with the same DCR on a bigger cam, you've got it everywhere.
But yes, with earlier IVC, you're getting more DCR. Great if you race people at 2500 rpms. But with the same DCR on a bigger cam, you've got it everywhere.
#44
Originally Posted by N4cer
NEED? No. But it will benefit from it across the board. The bigger cam will be better on the top end, regardless. DCR isn't the end-all of power. But it is the often overlooked component that makes idiots say that big cams don't drive good, and don't have much low end, and also makes people wonder why they didn't get enough guts out of their setup.
But yes, with earlier IVC, you're getting more DCR. Great if you race people at 2500 rpms. But with the same DCR on a bigger cam, you've got it everywhere.
But yes, with earlier IVC, you're getting more DCR. Great if you race people at 2500 rpms. But with the same DCR on a bigger cam, you've got it everywhere.
I don't even know what I'm asking heh, I think I just need to read a book on it.
#46
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So, a cam with bigger lobes to make DCR is always going to need a tighter LSA and more compression?
#47
Originally Posted by cws T/A
It will require more static compression the later the ivc closes , it doesnt have to have a tight lsa . I still dont get the huge cams in stock scr engines. The torque shows it on the dyno graphs When the actuall cam company that cuts it requires a higher staic compression to make full use of it . A 110 lsa is a common N/A gen 1 sbc LCA. Hell my 244@.050 cam off the shelf had a 106 lsa . It run dam good .
The key I would guess is the overlap of 32*/.050 and 62*/.006" - cylinder filling.
FWIW.