Best cams for stock valve springs
Feb 1, 2015, 11:37 AM
#1
Best cams for stock valve springs
So I've been thinking about picking up cams since I want to upgrade to an FP red soon.. My question is which are the best cams (preferably 272) that would work best on my 96k mile stock valve springs?
I had the head redone 10k ago but kept the stock valve springs. I don't want to remove the head again just to install valve springs and I feel that it would be hard to do with the head on.
I was thinking either GSC S1, Tomei Pro 270, or possibly Cosworth M2.
I had the head redone 10k ago but kept the stock valve springs. I don't want to remove the head again just to install valve springs and I feel that it would be hard to do with the head on.
I was thinking either GSC S1, Tomei Pro 270, or possibly Cosworth M2.
Feb 1, 2015, 11:42 AM
#2
Kelford 272's would be your best bet for the stock valve train. S1's are awesome but 272's will make more power. None of the Tomei cams can be used on the stock valve train because their 270, 280, and 290 all have 11.5mm of lift. S2's can also be used on the stock valve train when kept within the stock rev limit.
Feb 1, 2015, 12:45 PM
#4
I would say Kelford 272. Made a butt load of power with them on my stock valve springs. I would just be careful with revving too high. I think I only let my motor see about 8,000RPM (8,500 on a few occasions but never had any issues).
Kelford also makes a low lift version of their 272 which is 10.0mm lift instead of 11.0mm. I ran the 11's without issue.
Kelford also makes a low lift version of their 272 which is 10.0mm lift instead of 11.0mm. I ran the 11's without issue.
Last edited by badev0; Feb 1, 2015 at 12:50 PM.
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Feb 1, 2015, 08:43 PM
#8
Although they can be a bit fussy at idle, I went ahead and bought some FP4r cams because they can be used on the stock valvetrain when reving to 8K and seem to produce good mid-upper range power.
I had Kelford 272's on my old Evo 8 and was happy with their DD manners and power they produced but I wouldn't suggest them without upgrading the valve springs and retainers.
I had Kelford 272's on my old Evo 8 and was happy with their DD manners and power they produced but I wouldn't suggest them without upgrading the valve springs and retainers.
Feb 2, 2015, 02:53 PM
#13
Realistically stock cams for stock springs.
More often than not you can get away with S1s, HKS272s, and other low lift or shallow ramp rate aftermarket cams. Most of the ones that are being proffered in this thread will lead to tears sooner rather than later. Even S1s on stock springs will fatigue the springs and start to float over time. The longest I have seen a car that was regularly revved to 8k with stock springs and some form of cams (in this case S1s) was 45k miles.
I strongly recommend buying springs and doing them at the same time on any cam set. Far cheaper to do springs now than do a motor when it drops a valve. Especially when you add aggressive ramp rates into the equation and higher lift.
More often than not you can get away with S1s, HKS272s, and other low lift or shallow ramp rate aftermarket cams. Most of the ones that are being proffered in this thread will lead to tears sooner rather than later. Even S1s on stock springs will fatigue the springs and start to float over time. The longest I have seen a car that was regularly revved to 8k with stock springs and some form of cams (in this case S1s) was 45k miles.
I strongly recommend buying springs and doing them at the same time on any cam set. Far cheaper to do springs now than do a motor when it drops a valve. Especially when you add aggressive ramp rates into the equation and higher lift.