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Rev limiter - stocks springs on HKS 272s

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Old Apr 19, 2009, 12:36 PM
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Rev limiter - stocks springs on HKS 272s
what do you guys think i should set the rev limiter at if i'm using stock springs on HKS 272 cams. it's my daily driver and i only plan on redlining it once in a while and bringing it to the track once a year?? also, has anyone actually seen valve float on a 4g63 before??
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Old Apr 19, 2009, 12:44 PM
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my tuner set mine at 7600rpm, I rev it all the time
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Old Apr 19, 2009, 12:45 PM
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That seems about right, 7500 or so. Never seen valve float, no.
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Old Apr 19, 2009, 12:48 PM
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I revv to 8k stock valve train....
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Old Apr 19, 2009, 01:11 PM
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any idea how many miles to expect out of the stock springs once i put on the 272s??
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Old Apr 19, 2009, 01:49 PM
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Originally Posted by ajrblanco
any idea how many miles to expect out of the stock springs once i put on the 272s??
I rev to 8k...I have about 15k miles on mine
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Old Apr 19, 2009, 01:58 PM
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Originally Posted by ajrblanco
any idea how many miles to expect out of the stock springs once i put on the 272s??
Probably as many as you can put on them. I doubt you will see anything happen to them. If something did happen to them, you would probably see some catastrophic damage to your head/motor.

I've revved out BC 280 cams on stock valvetrain over 8000rpms for over 20k mi. Is it smart? No.
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Old Apr 19, 2009, 02:02 PM
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You would just toss a rocker. No big deal. Pop it back on and continue your drive to the post office. Its happened to me and many other 4g63'ers many times.
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Old Apr 19, 2009, 02:07 PM
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Originally Posted by dan l
You would just toss a rocker. No big deal. Pop it back on and continue your drive to the post office. Its happened to me and many other 4g63'ers many times.
you throw rockers when you redline, right?? not during normal operation??
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Old Apr 19, 2009, 02:22 PM
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I have the Kelford 272s and believe Ivey set my redline around 7500. Doesnt seem like a big deal until you are over 8k...
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Old Apr 19, 2009, 02:24 PM
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23k on stock valve train revving to 8k, no problems yet!
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Old Apr 19, 2009, 02:37 PM
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I have a GT35R. 272 HKS's, and my rev limit is set to 8000 but my shift lights are set at 7000, so with my slow reaction time. I log my shifts in the 7200-7400 range depending on gear.

On a side note hopefully you are not on a stock turbo. If so 8000 is way out of it's range.
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Old Apr 19, 2009, 02:42 PM
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Originally Posted by fugiwara
my tuner set mine at 7600rpm, I rev it all the time
7600 is stock
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Old Apr 19, 2009, 07:06 PM
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you wont see valve float until you hit 9k-10k
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Old Apr 19, 2009, 08:00 PM
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what i have noticed is on a stock turbo, egts go up after 7500. I keep mine @ 7.5k for this reason. ( amoung others mentioned before in this thread)
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