gsc s3
Jun 9, 2017, 10:04 AM
#4
You most definitely cannot run them with stock valve springs. Anyone who does is dumb and is cutting serious corners and playing with fire so to speak. The S3's have too much lift for the stock valve spring. GSC S2's can be ran on stock valve springs if the car is kept within the stock rev range. And the stock retainers are fine for any cam you put in the car. Definitely do not NEED retainers. A good set of beehive valve springs will be just fine.
Jun 9, 2017, 10:23 AM
#5
EvoM Guru
iTrader: (1)
Absolutely can not. Springs and retainers are required for S3's.
Per GSC, the stock retainer is only good to 11.2mm of lift before it starts hitting the valve seal.
https://www.power-division.com/gsc-p...r-evo-8-9.html
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JohnBradley (Jun 13, 2017)
Jun 9, 2017, 09:45 PM
#9
Absolutely can not. Springs and retainers are required for S3's.
Per GSC, the stock retainer is only good to 11.2mm of lift before it starts hitting the valve seal.
https://www.power-division.com/gsc-p...r-evo-8-9.html
Per GSC, the stock retainer is only good to 11.2mm of lift before it starts hitting the valve seal.
https://www.power-division.com/gsc-p...r-evo-8-9.html
One other take away from that link is that they only reccomend a peak rev of 8200rpm and a peak boost of 25psi
I wonder if that is due to factory retainers? Or the springs themselves.....
Jun 10, 2017, 10:56 PM
#10
Evolved Member
Jun 12, 2017, 07:47 AM
#12
EvoM Guru
iTrader: (1)
The factory aluminum retainer is lighter weight than a Ti retainer. So the spring is what is limiting RPM and boost with a certain camshaft profile.
Jun 12, 2017, 03:47 PM
#14
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I would invest in a set of Kiggly beehive or GSC HP springs and retainers. The last thing you want is to cheap out and have a spring crack, drop a valve and wreak havoc in there.
