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Old 03-06-2014, 05:18 PM   #1
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Default Increasing rev limit on the VVT

Just double checking what I've read so as to make sure I don't goof something up.

I've got a TSE shortblock (Forged rods, billet vvt oil pump, supermiata damper) coming in the next couple weeks. I have a VVT head.

With a TSE Shortblock, all I need is upgraded valve springs (Preferably the dual mass springs) to help with the VVT harmonics to be able to rev higher, correct?

I'm looking for 8k-8500 rev limit, have the head off of my current VVT engine, and have no problem putting in an order tonight to TSE or 949 for springs.
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Old 03-06-2014, 05:24 PM   #2
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I would've added SUB lifters too.
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Old 03-06-2014, 05:29 PM   #3
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Or shimless buckets...
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Old 03-06-2014, 05:36 PM   #4
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Pretty sure andrew doesn't advise reving past 7400 on vvt heads.
Then you have people like fae claiming to rev to 8 for years with no ill effects.
I'd trust the guy building your engine.
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Old 03-06-2014, 05:54 PM   #5
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Quote:
Originally Posted by 18psi View Post
Pretty sure andrew doesn't advise reving past 7400 on vvt heads.
Then you have people like fae claiming to rev to 8 for years with no ill effects.
I'd trust the guy building your engine.
Quote:
Originally Posted by Savington
If you regularly rev a stock-valvetrain VVT head past 7500rpm, then yes, you'll hammer the seats out, but if you keep the revs low or upgrade the valve springs then it's not a problem.

VVT is worthwhile on every application.
Que?
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Old 03-06-2014, 05:55 PM   #6
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Yeah, just ask andrew. I think he told me valve springs and throttle body (skunk2 or epoxied oem) are all you need once the bottom end is strengthened, but I'd just call/email him.
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Old 03-06-2014, 06:05 PM   #7
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My setup have once (by misstake) seen 10.3k without valve float...
But I don't have even one hour above 8k, yet.

SUBs and ST single springs would probably be enough on stock cams.
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Old 03-06-2014, 06:13 PM   #8
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I can send springs with your engine, just email me.
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Old 03-06-2014, 06:19 PM   #9
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Quote:
Originally Posted by 18psi View Post
Pretty sure andrew doesn't advise reving past 7400 on vvt heads.
Then you have people like fae claiming to rev to 8 for years with no ill effects.
I'd trust the guy building your engine.
Fae's car is currently down because his VVT actuator broke. He believes it is from over revving, not sure how high or how constantly.
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Old 03-06-2014, 07:13 PM   #10
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Quote:
Originally Posted by Savington View Post
I can send springs with your engine, just email me.
You rock Sav.

Sounds like I've got it sorted out guys, thanks for the help!

Quote:
Originally Posted by shuiend View Post
Fae's car is currently down because his VVT actuator broke. He believes it is from over revving, not sure how high or how constantly.
Using Fae's car as a reference to ANYTHING is setting yourself up for .
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Old 03-06-2014, 07:58 PM   #11
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With the valve springs you're going to get from sav and stock lifters my car spins to 8500 without complaint. I really wish I thought to get the subs on the first go around, but I'll put them in the next engine after this one blows up.
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Old 03-06-2014, 09:47 PM   #12
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I'm just going full on CNC head with my next setup. When I originally made my plans for this build, the CNC head didn't exist yet :(.
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