LT-1 Valvetrain
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Instructor
Joined: Mar 2003
Posts: 176
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From: Holtsville NY
LT-1 Valvetrain
when upgrading to 1.6 RR should you I get self aligning or not?
also what are the best hydraulic lifters for the LT-1?
and are there any 1.7 RRs for the LT-1?
any one better brand of springs, pushrods, guideplates, etc..
Thanks for any info
also what are the best hydraulic lifters for the LT-1?
and are there any 1.7 RRs for the LT-1?
any one better brand of springs, pushrods, guideplates, etc..
Thanks for any info
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Re: LT-1 Valvetrain (Epyon127)
when upgrading to 1.6 RR should you I get self aligning or not?
also what are the best hydraulic lifters for the LT-1?
and are there any 1.7 RRs for the LT-1?
any one better brand of springs, pushrods, guideplates, etc..
also what are the best hydraulic lifters for the LT-1?
and are there any 1.7 RRs for the LT-1?
any one better brand of springs, pushrods, guideplates, etc..
- "Best lifter" depends on what you're going to do with the engine. If it's going to stay basically stock, the OEM lifters are fine. It's very unusual to have to replace roller lifters. They don't mushroom and wear like conventional flat tappets.
- Yes, there are 1.7s. I believe Nathan Plemons has them.
- Seems many like CompCams for guideplates and pushrods. Springs are dependent on cam choice and cylinder head work.
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: LT-1 Valvetrain (Epyon127)
For the simplest bolt on installation you can get the crane gold self aligning 1.6 rockers. They do not require guideplates, etc.
If you want 1.7's Scorpion makes a set for SBC's but they are not self aligning. This means that you will have to buy hardened pushrods & guideplates.
The best LT1 lifters are probably the Comp Cams Pro Magnum's. They are specifically designed for better performance at higher RPM's. Pushrods, I use Trick Flow single piece chromemoly units. They are little costly but they are very nice. Guideplates I just use comp cams.
Springs? I use Performance Engine Products springs but they are not a direct bolt on, they require head modification. I would go with comp or crane, just stay away from Lunati. They've had some serious problems in the past and I don't trust them.
You spring choice is going to depend on the total lift of your system. Are you looking at this for a stock cam or aftermarket? :cheers:
If you want 1.7's Scorpion makes a set for SBC's but they are not self aligning. This means that you will have to buy hardened pushrods & guideplates.
The best LT1 lifters are probably the Comp Cams Pro Magnum's. They are specifically designed for better performance at higher RPM's. Pushrods, I use Trick Flow single piece chromemoly units. They are little costly but they are very nice. Guideplates I just use comp cams.
Springs? I use Performance Engine Products springs but they are not a direct bolt on, they require head modification. I would go with comp or crane, just stay away from Lunati. They've had some serious problems in the past and I don't trust them.
You spring choice is going to depend on the total lift of your system. Are you looking at this for a stock cam or aftermarket? :cheers:
Le Mans Master
Joined: Oct 1999
Posts: 9,713
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From: Sachse Texas
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Cruise-In II Veteran
Re: LT-1 Valvetrain (Epyon127)
I use stock lifters and they last fine and pull well up to about 6500 RPM. If you plan on going more, then you want the Comp Cams R lifters. They will live with a little more RPM for a hydraulic roller lifter. I have had one stock lifter fail after romping on it up to about 6600 RPM but I think it was a fluke.
