high revving 2.5
#1
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high revving 2.5
Hi there i am currently in the middle or forging my 07 sti hawk. im going for cosworth pistons, rods, head gaskets and bearings.
im wondering whether to uprate the valve springs?
im looking for a safe 450 bhp but have read quite alot that the 2.5's dont like to be revved to the limiter much.
whats the reason for this and alotho i will not be increasing the rev limiter i was wondering if uprated valves springs will help, i was looking at the cosworth valve springs but keeping standard valves.
i do a little bit of drifting and was thinking while the engines apart may look at doing them
any ideas would be great
im wondering whether to uprate the valve springs?
im looking for a safe 450 bhp but have read quite alot that the 2.5's dont like to be revved to the limiter much.
whats the reason for this and alotho i will not be increasing the rev limiter i was wondering if uprated valves springs will help, i was looking at the cosworth valve springs but keeping standard valves.
i do a little bit of drifting and was thinking while the engines apart may look at doing them
any ideas would be great
#3
I'm not sure about on the scoob engines but when i built bike engines and wanted higher rev's i used, uprated springs, one piece stainless valves, titanium spring retainers and lighter followers. Be careful with the springs though. Go to strong and they will wear out your cams.
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