Cams changed
Cams changed
Hey there! I was browsing the web last night and I saw that changing my cams can give more power to my Ka24de engine... I just want to know if any of you guys here have tried this and if so, what kind of cams can I get myself? Thnaks a lot
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:: orion ::
- Posts: 1483
- Joined: Fri May 23, 2003 4:40 pm
- Car: '96 240SX, with KA-T @ 12psi...
- Contact:
Here's a cut-and-paste from Zilvia...I posted it a few days ago:
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Cam Options for the KA24DE:
JWT - Advertised as 275 degrees, but really 256 duration. The 'ramp up' I've read is better than stock cams, so the valves are open more for a longer time, plus the extra duration. Seemingly GREAT, but $600...
Nissan Motorsports USA - 248/248 (Intake/Exhaust) duration. Really just one stock '91-92 exhaust cam in the exhaust spot, and another exhaust cam re-pinned (for the cam gear) to be used in the intake spot. Good, fun cams (I have driven a car with them a bunch of times) - Pulls hard to redline, but some low end loss is noticeable. About ~$350-400..
'91-92 Cams - 240/248 duration. Great upgrade for S14 guys, but I wouldn't spend more then $150 on 'em...makes the upper end smoother, and shifts the curve to the right by ~200rpm. Good for maybe ~3-4rwhp, but makes the car more lively. I run these...
Altima Cam - IMO, it's a MYTH perpetuated by the FAQ at 240SX.org. If it were a drop in 248 degree cam that works on the intake side, why would Nissan Motorsports take the time to re-pin a '91-92 exhaust cam to sell with their set??? They wouldn't. So I'd bet it's the same as the 240 degree intake cam from the '91-92 motors, but who knows. (And yes, you can see where the old pin was ground off and the new one inserted on the NM camset...I've installed a set).
Gude - I saw a writeup on Freshalloy about these - Lost LOTS of low end, and gained little up top.. Didn't look great IMO, butto get the full reveiw, search the Freshalloy 'Advanced 240SX' Forum.
Shimming - It was not necessary on the Nissan Motorsports cams I installed, and has not been necessary on the last 2 S14 KA's I've put my S13 cams in - Most the times an OEM cam won't need new shims. The JWT supposedly is the same....but you need to check anyway, it's simple. Any regrind will need new shims...
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Hope that anwers some questions - Brian
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Cam Options for the KA24DE:
JWT - Advertised as 275 degrees, but really 256 duration. The 'ramp up' I've read is better than stock cams, so the valves are open more for a longer time, plus the extra duration. Seemingly GREAT, but $600...
Nissan Motorsports USA - 248/248 (Intake/Exhaust) duration. Really just one stock '91-92 exhaust cam in the exhaust spot, and another exhaust cam re-pinned (for the cam gear) to be used in the intake spot. Good, fun cams (I have driven a car with them a bunch of times) - Pulls hard to redline, but some low end loss is noticeable. About ~$350-400..
'91-92 Cams - 240/248 duration. Great upgrade for S14 guys, but I wouldn't spend more then $150 on 'em...makes the upper end smoother, and shifts the curve to the right by ~200rpm. Good for maybe ~3-4rwhp, but makes the car more lively. I run these...
Altima Cam - IMO, it's a MYTH perpetuated by the FAQ at 240SX.org. If it were a drop in 248 degree cam that works on the intake side, why would Nissan Motorsports take the time to re-pin a '91-92 exhaust cam to sell with their set??? They wouldn't. So I'd bet it's the same as the 240 degree intake cam from the '91-92 motors, but who knows. (And yes, you can see where the old pin was ground off and the new one inserted on the NM camset...I've installed a set).
Gude - I saw a writeup on Freshalloy about these - Lost LOTS of low end, and gained little up top.. Didn't look great IMO, butto get the full reveiw, search the Freshalloy 'Advanced 240SX' Forum.
Shimming - It was not necessary on the Nissan Motorsports cams I installed, and has not been necessary on the last 2 S14 KA's I've put my S13 cams in - Most the times an OEM cam won't need new shims. The JWT supposedly is the same....but you need to check anyway, it's simple. Any regrind will need new shims...
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Hope that anwers some questions - Brian
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MikeMurphy
- Posts: 824
- Joined: Sun Feb 23, 2003 12:20 pm
- Car: Guess
- Contact:
can save me some $$ :P loll well, until I decide to go for more expensive!