Stronger Valve springs with stock valves for RACE!!
#1
Stronger Valve springs with stock valves for RACE!!
This have come to mind after seeing recent talks about stock head and higher RPM. Now I have not done anything to the valves or the valve train. The head is definitely ported. An associate of mine that knows more than I will ever know about engine design and modified engines (he has been building funny car 5000hp+ engines since the 80's) recommended I don't go with bigger valves. But with that big turbo I am thinking I will need the higher RPM. Would you guys recommend changing the springs over?
The head is a 99 head, heavily ported and polished. I have an EFR 8374 and looking to run ALLOFIT race only. No street use. This thing will only see under 4000rpm when it is spinning tires out of the pits!
I know the stock valve-train will most likely be fine a few times at about 8000 rpm. But continuously pushing it at 550-600hp might not be the best idea. Do I go all out with springs or something in the middle?
The head is a 99 head, heavily ported and polished. I have an EFR 8374 and looking to run ALLOFIT race only. No street use. This thing will only see under 4000rpm when it is spinning tires out of the pits!
I know the stock valve-train will most likely be fine a few times at about 8000 rpm. But continuously pushing it at 550-600hp might not be the best idea. Do I go all out with springs or something in the middle?
#9
How much are the SUBs worth. I'm going to be checking my valve clearances this off season and installing the inner springs to my supertech duals. And if I need the change the shimming on more than a couple valves I might as well just get the SUBs. I've been spinning to 8.5k with just the outer springs of the supertech duals on the VVT head. If I can turn that up another few rpms I gain another mph for every ~125rpms and I've been hitting the limiter a few times lately while still down 200hp from the competition.
Thread
Thread Starter
Forum
Replies
Last Post
Frank_and_Beans
Supercharger Discussion
13
09-12-2016 08:17 PM