268 or 272 Camshafts?
#4
Lexus Champion
iTrader: (3)
Since you're obviously going to invest some money to have them custom made for you, I'd go with the 272's from the beginning and call it a day.
Hopefully, you're aware that cams for the SC(NA Engine) must have the drive(spindle) on the end of the exhaust cam for the distributor and there's no company to my knowledge that makes them. That's unless you've removed your distributor, which will enable you to run any TT cam setup.? Check out webcams, they custom make the regrinds to whatever spec/duration/lift that you want for the NA.
Last edited by Wicked SC; 09-25-10 at 10:55 AM.
#6
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iTrader: (7)
272 on a na motor is very agressive and WILL for certain make your motor a interference motor meaning is timing belt lets loose or timing tentioner lets loose valves will collide with piston top and tuning on high lift high duration cams will diminish driveability somewhat..
i have the 268's which put me right at the edge of not being interference , got a nice lope at idle but man do they open the turbo up in mid right to redline .. between going from a .68 hot side housing to a .81 and the addition of cams , car went from 480 ish rwhp at 23psi to 561 rwhp at 21 psi, so 2 lbs less boost and picked up a tad over 80 rwhp
i have the 268's which put me right at the edge of not being interference , got a nice lope at idle but man do they open the turbo up in mid right to redline .. between going from a .68 hot side housing to a .81 and the addition of cams , car went from 480 ish rwhp at 23psi to 561 rwhp at 21 psi, so 2 lbs less boost and picked up a tad over 80 rwhp
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#9
Lexus Champion
iTrader: (3)
272 on a na motor is very agressive and WILL for certain make your motor a interference motor meaning is timing belt lets loose or timing tentioner lets loose valves will collide with piston top and tuning on high lift high duration cams will diminish driveability somewhat..
i have the 268's which put me right at the edge of not being interference , got a nice lope at idle but man do they open the turbo up in mid right to redline .. between going from a .68 hot side housing to a .81 and the addition of cams , car went from 480 ish rwhp at 23psi to 561 rwhp at 21 psi, so 2 lbs less boost and picked up a tad over 80 rwhp
i have the 268's which put me right at the edge of not being interference , got a nice lope at idle but man do they open the turbo up in mid right to redline .. between going from a .68 hot side housing to a .81 and the addition of cams , car went from 480 ish rwhp at 23psi to 561 rwhp at 21 psi, so 2 lbs less boost and picked up a tad over 80 rwhp
The 9.6 High lift is what Terry has which require a Valve Spring upgrade!
The 9.45 doesn't and that's the cams in which I've gone with so we'll know very soon how they behave on the NA head..
Ed, also remeber big Dave has the HKS 272's and they didn't even require a valve Spring upgrade and his lobe on his idle isn't that bad at all...
#10
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I decided to go with TTC's 268 grind. With that w58 tranny I kno I'm limited but I figured build the motor now so I won't have to pull it again.
So far I have:
Brian Crower titanium springs and retainers
GTE oil pump
Eagle rods
Wiseco pistons (.40 Oversize bore)
Brian Crower 87mm head gasket
ARP Head Studs
With a Stage 2 SRT turbo kit (off an is300)
So far I have:
Brian Crower titanium springs and retainers
GTE oil pump
Eagle rods
Wiseco pistons (.40 Oversize bore)
Brian Crower 87mm head gasket
ARP Head Studs
With a Stage 2 SRT turbo kit (off an is300)
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