safe redline on a stock head

[Gorilla Unit 33]

My current turbo is being swapped out at the end of this week for a bigger one. To be exact its the 50 trim from bullseye 76 hot side ceramic coated. I was just wondering i noticed the stock z6 motor makes peak torque at 7000 but i think si's cluster have redline at like 7200 right? (not 100% sure). What my question here is with such a big turbo Im also still runing stock head, now what would be ok to rev out to (shift point). Stock cam, valves, everything in the head. The bottom end has Eagle H beam rods and Srp pistons built to 9:1 with a block guard. I would like to know so when i got to get a full boost tune on the new turbo i can keep it in mind. Any advice here would be apreciate it.

 

[slowhatch]

i wouldnt feel safe going over factory rev limit just because its stock.

 

[Gorilla Unit 33]

i wouldnt feel safe going over factory rev limit just because its stock.

oh yes sure. i feel that but i just want to make sure what the factory limit is on that motor also since it never came stock in my cx so i wanted to know for sure before hand

 

[got traction]

i actually brought my redline down to 7000 just to be safe on my turbo d

 

[Gorilla Unit 33]

i actually brought my redline down to 7000 just to be safe on my turbo d

whats your build? or are you running on all stock internals

 

[got traction]

whats your build? or are you running on all stock internals

stock head ( just rebuilt to oem specs)
y8 block
vitara pistons
eagle rods
golden eagle block guard

 

[TiiM iiS l3eAsT]

yea thats a mild build to me^^

to make your redline higher i think you have to rebuild your head correct? i think its the head that determines your redline.....so i would suggest building your head b4 u higher the redline......i would keep it at 7k and a revlimit at 7.2k

 

[caddy]

I threw a rod shifting at 7200rpm on my d16z6.

 

[Genuine Rolla]

keep it at 7000...I wouldn't go any higher.

 

[Gorilla Unit 33]

hey guys thanks. im not looking to take it any higher just wanted to know a safe point. 7k it is then. hopefully by the end of summer ill be building the head.

 

[Steven.]

i reved my dohc zc stock to 8k daily.

but my turbo dohc zc will have a redline of 7500.

 

[d16_turbo]

dyno it and see where the power starts to fall off at

 

[slowhatch]

yea thats a mild build to me^^

to make your redline higher i think you have to rebuild your head correct? i think its the head that determines your redline.....so i would suggest building your head b4 u higher the redline......i would keep it at 7k and a revlimit at 7.2k

rebuild it with some springs/retainers and valves. since your in the head you might as well change the cam to.

but its your valve springs and connecting rod bolts that determine your rev limit (besides hp). you'll float a valve or stretch a rod bolt if you dont change 'em out.

 

[that_sick_eg]

my vx redlines at 6k and i take it to 6.5k

 

[TiiM iiS l3eAsT]

rebuild it with some springs/retainers and valves. since your in the head you might as well change the cam to.

but its your valve springs and connecting rod bolts that determine your rev limit (besides hp). you'll float a valve or stretch a rod bolt if you dont change 'em out.

 

[gotkiet]

i redline my d16y8 at 7.6k