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??

 

my tuner set mine at 7600rpm, I rev it all the time

 

That seems about right, 7500 or so. Never seen valve float, no.

 

I revv to 8k stock valve train....

 

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

 

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.

 

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??

 

I have the Kelford 272s and believe Ivey set my redline around 7500. Doesnt seem like a big deal until you are over 8k...

 

23k on stock valve train revving to 8k, no problems yet!

 

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.

 

7600 is stock

 

you wont see valve float until you hit 9k-10k

 

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)