350 whp from sts!?! thats all!?!?
09-13-2007, 07:44 PM
#161
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talked to a couple engine builders today, they told me i shouldnt have to change my valve springs just because im throwing boost on my motor unless they were already beat to **** or broken.... just wanna make sure i really need them before i spend the cash
09-13-2007, 08:07 PM
#162
I call BS... Honestly FI is a whole different monster... The stock valve spring pressure isn't that much and even if you put a little cam in it you'd have to change the springs... I'd do it if I were you, seriously... Think about it... If the boost is resting on the valve and the spring does't have enough pressure it's going to stay partially down and loose air just like if you had a cam with overlap... Also the obvious chance of banging one of your pistons...
Guys here are recommending them because they HAVE been there and done it successfully... they don't want you to break your pistons or have to rebuild prematurely... Just think about it bro..
Guys here are recommending them because they HAVE been there and done it successfully... they don't want you to break your pistons or have to rebuild prematurely... Just think about it bro..
09-14-2007, 12:18 AM
#164
Originally Posted by mycar2fast
talked to a couple engine builders today, they told me i shouldnt have to change my valve springs just because im throwing boost on my motor unless they were already beat to **** or broken.... just wanna make sure i really need them before i spend the cash
You can run on your stock valvesprings at 5psi without any problems for quite a while, just shift at 4500 rpms.
Good luck reinventing the wheel, sounds like you are way over your head and taking advice from people who haven't been there done that.
09-14-2007, 07:10 AM
#166
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what springs should i get and is that all i need or do i need the whole spring kit??? already have .81 housing, and fmic on the way, anyway i was driving to work this morning and laid into it around 80 in 4th gear up to 120 and as soon as i got close to 4k or a lil above you could definetly feel something all the sudden bog the motor......what ya think?
09-14-2007, 07:25 AM
#167
comp 918's should be good with the stock cam. Thats about all you will need, not sure whats involved in an entire spring kit though. I dont think youd need hardened pushrods but you could look into that as well since you will have the heads pulled. Good luck though and keep us updated!
09-14-2007, 07:26 AM
#168
I think you should be very careful with driving the car, bogging or any issues with an FI car should be handled with the utmost care, otherwise we are going to be seeing a "what forged engine should I get" post from you very soon. Be careful with that car man and get things sorted out before getting into boost!
09-14-2007, 09:24 AM
#169
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Originally Posted by mycar2fast
what springs should i get and is that all i need or do i need the whole spring kit??? already have .81 housing, and fmic on the way, anyway i was driving to work this morning and laid into it around 80 in 4th gear up to 120 and as soon as i got close to 4k or a lil above you could definetly feel something all the sudden bog the motor......what ya think?
09-14-2007, 10:38 AM
#170
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How could he be floating springs at 0psi then? This whole valvespring thing is got me wondering, because I can throw 15-20psi of boost on stock 3800 valvesprings and not have them float on me. We use STOCK ls1 valvesprings to upgrade our system for piece of mind.
09-14-2007, 01:13 PM
#173
Originally Posted by darkhorizon
How could he be floating springs at 0psi then? This whole valvespring thing is got me wondering, because I can throw 15-20psi of boost on stock 3800 valvesprings and not have them float on me. We use STOCK ls1 valvesprings to upgrade our system for piece of mind.
09-14-2007, 05:32 PM
#174
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Originally Posted by mycar2fast
talked to a couple engine builders today, they told me i shouldnt have to change my valve springs just because im throwing boost on my motor unless they were already beat to **** or broken.... just wanna make sure i really need them before i spend the cash
