athousandleaves":1aky5ucm said:
Be careful with the higher pressure springs in the head, I recall a post over on one of the MR2 forums where they attributed the frequent breaking of camshafts to higher strength springs...
Not sure if this is the right thread but theres some good info about the valvetrain there anyway.
http://www.mr2oc.com/showthread.php?t=4 ... ics/440599
Amazing you were doing this well with bent valves all along...
I already looked up the specs of about every valve spring for the 3S-GTE. The problem I found is that some companies have about the same pressure as the GSC Beehive I'm getting but with the bigger (standard size) retainer they are not meant for the rpm I am turning. All the companies were claiming that they are only good to the 8000-8500rpm and like 35psi. GSC is the only company that had a spring/retainer setup that was designed to handle 9000-9500rpm, 40-45psi of boost, with a 272 10.4mm lift cam. Below are the specs of all the valve springs I found. If the companies website didn't list their spec I emailed them for it. Only the Engle one I got from the exact forum thread you linked but I had read that and got the info on them before.
Brian Crower
Seat-1.350” (34.3mm)-85lbs
Open -.900” (23mm) (11.5mm lift)-200lbs
Coil Bind- .820” (20.8mm)
Engle (ATS sells these)
Seat-1.358” (34.5mm)-78.5lbs
Open -.900” (23mm) (11.5mm lift)-132lbs
Coil Bind- .857” (21.8mm)
Ferrea Dual Springs
Seat-1.378” (35mm)-65lbs
Open-.984” (25mm) (10mm lift)-185lbs
Coil bind-.591” (20MM) (15mm lift)
GSC Standard (rated to 8200 rpm and 32psi)
Seat-1.354” (34.5mm)-74lbs
Open-.921” (23.5mm) (11mm lift)-200lbs
GSC Beehive (don’t sell this kit anymore) (rated to 9000rpm and 35psi)
Seat-1.354” (34.5mm)-70lbs
Open-.954” (24.2mm) (10.3mm lift)-173lbs
Coil Bind-.590 (15mm)
GSC Beehive (revised with 2JZ Springs) (rated to 9500rpm and 45psi)
Seat-1.354" (24.5mm)-82lbs
0pen-.954' (24.2)-205lbs
Open-.904" (23mm)-225lbs
HKS
Seat-1.394” (35.4mm)-55lbs
Open-.972” (24.7mm) (10.7mm lift)-155lbs
Coil Bind-.941” (23.9mm)
Jun
Seat-1.36” (34.5mm)-66lbs
Open-.965” (24.5mm) (10mm lift)-160lbs
Kelford
Seat-1.42” (36mm)-85lbs
Open-.900” (23mm) (13mm lift)-175lbs
SuperTech Single Spring (was told "couldn't" handle my needs)
Seat-1.368” (34.75mm)-59lbs
Open-.896” (22.75mm)-175lbs
Coil bind-.815” (20.7mm)
SuperTech Dual Springs (was told "maybe" these could handle my needs)
Seat-1.398” (35.5mm)-77lbs
Open-.925” (23.5mm)-222lbs
Coil bind-.815” (20.7mm)