Any of you boosted guys upgrade your valves?
Thread Starter
Hot Seduction: Vol 1
Joined: Nov 2002
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From: CD in stores now.
Any of you boosted guys upgrade your valves?
I am trying to decide between OEM ITR, Supertech, and Manley valves for my future 400+whp turbo R. What are your opinions?
Your Local DSM Tech
Joined: Nov 2002
Posts: 6,711
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From: Newport News
helps to ease more air into the cyl. and helps to vent exhaust gases out that is if they are oversized (this is my opinion)
also them being a diffrent metal or coated with something can withstand more heat in the cyl without burning and i think they also disapate heat faster. Then there is the whole weight thing
also them being a diffrent metal or coated with something can withstand more heat in the cyl without burning and i think they also disapate heat faster. Then there is the whole weight thing
Venuto Ottenga Alcun
Joined: Nov 2002
Posts: 318
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From: Hampton
I like SI Valves "Silver Line"
Bigger valves, in our case .5mm on the intake and 1.0mm on the exhaust without cutting the seats, allows the boost to be lower to make power because of the less restriction entering the combustion chamber and quicker spool on the turbo with bigger exhaust valves.
Titanium is good for weight savings and reving, but they cost a grip. But not really for daily driven cars.
Bigger valves, in our case .5mm on the intake and 1.0mm on the exhaust without cutting the seats, allows the boost to be lower to make power because of the less restriction entering the combustion chamber and quicker spool on the turbo with bigger exhaust valves.
Titanium is good for weight savings and reving, but they cost a grip. But not really for daily driven cars.
