HKS 280's over 272's on 2.3 stroker
a -4/-2 cam setting on the 280s will hurt spoolup and low end, Ted's suggested settings will help regain the lost spool and still give you plenty of useable power up top. However, as he mentioned you better have a good means of tuning, because advancing the cam timing will make the motor more detonation prone.
- Steve
- Steve
Originally Posted by GTREVO
What do you suggest Ted?? Advance the intake by 1 and retard the exhaust by 1? IS that crank or cam degrees?
The JUN 272s have even longer duration than the HKS 280s, so don't think the JUNs are 'smaller' cams. They aren't!
It is absolutely fine to run HKS 280s on a stroker. Try the cam settings I specified.
It is absolutely fine to run HKS 280s on a stroker. Try the cam settings I specified.
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From: Jerzy Shore............
Originally Posted by Dutch
Am I having a brain fart? As I understand it:
Longer duration cams offer more power at the higher end of the rpm band. With a stroker kit at 2.3L, your top end is 6,500rpm, 7k max, right? I'd go from the 272's to the 264's, so you get more at more of that area under the lower rpm part of the curve. With 272's, and even more so with 280's, you get a huge spike under the curve from 6,500 to 8k+, but you can't safely use that torque with a stroker kit.
True, bigger turbo's like longer duration cams, but what good are they if you can't get at the majority of the power, anyway? Plus, the reason one would go for longer duration cams with a big turbo is for better spool-up, right? Well, with that 2.3L stroker, you're already getting hella fast spool-up, much more so than long-duration cams can offer.
If I'm wrong, let me know, but my understanding of stroker kits, turbos and cams and their inter-relationships has recently been overhauled by someone I trust quite a bit, so I thought I'd pass it on.
Longer duration cams offer more power at the higher end of the rpm band. With a stroker kit at 2.3L, your top end is 6,500rpm, 7k max, right? I'd go from the 272's to the 264's, so you get more at more of that area under the lower rpm part of the curve. With 272's, and even more so with 280's, you get a huge spike under the curve from 6,500 to 8k+, but you can't safely use that torque with a stroker kit.
True, bigger turbo's like longer duration cams, but what good are they if you can't get at the majority of the power, anyway? Plus, the reason one would go for longer duration cams with a big turbo is for better spool-up, right? Well, with that 2.3L stroker, you're already getting hella fast spool-up, much more so than long-duration cams can offer.
If I'm wrong, let me know, but my understanding of stroker kits, turbos and cams and their inter-relationships has recently been overhauled by someone I trust quite a bit, so I thought I'd pass it on.
I had hks 272 in my 2.4 with greddy t67/8cm. Switching to crower 414 picked up 25hp at 7000 and 47hp at 7500. 3 mph at the track. No tuning changes made. idled way better too. No loss of bottom end or spool.
Hard to find info on the crower cams. I am running a 2.4 also 272's but am using it for road racing not drag. Do you have any before and after dyno charts on the crower vs 272?
Last edited by gt40; Dec 22, 2005 at 10:44 PM.
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From: Malaysia
Originally Posted by 94AWDcoupe
I had hks 272 in my 2.4 with greddy t67/8cm. Switching to crower 414 picked up 25hp at 7000 and 47hp at 7500. 3 mph at the track. No tuning changes made. idled way better too. No loss of bottom end or spool.
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From: Malaysia
Originally Posted by Ted B
The JUN 272s have even longer duration than the HKS 280s, so don't think the JUNs are 'smaller' cams. They aren't!
It is absolutely fine to run HKS 280s on a stroker. Try the cam settings I specified.
It is absolutely fine to run HKS 280s on a stroker. Try the cam settings I specified.
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