roller rocker new YT6645 vs Comp Ultra Gold 1.72
#2
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Depending how how aggressive cam is we recommend the yella terras. We put the comps on and lost 90rwhp. Comp caused valve float power started to drop at 5500 rpm. Motor was a 427 TT AFR 245 hydraulic roller 235/235 with same spring pressures.
#3
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What's the lift on the cam you're going to use?
If the lift is around .600" or less the I'd just up grade the bearings on the stock rockers, if not I'd consider going with Jesel SS rockers. I've lost my trust in the YT rockers after breaking several with properly set up PAC 1521 valve springs.
If the lift is around .600" or less the I'd just up grade the bearings on the stock rockers, if not I'd consider going with Jesel SS rockers. I've lost my trust in the YT rockers after breaking several with properly set up PAC 1521 valve springs.
Last edited by 99Bluz28; 12-02-2012 at 03:52 PM.
#7
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What's the lift on the cam you're going to use?
If the lift is around .600" or less the I'd just up grade the bearings on the stock rockers, if not I'd consider going with Jesel SS rockers. I've lost my trust in the YT rockers after breaking several with properly set up PAC 1521 valve springs.
If the lift is around .600" or less the I'd just up grade the bearings on the stock rockers, if not I'd consider going with Jesel SS rockers. I've lost my trust in the YT rockers after breaking several with properly set up PAC 1521 valve springs.
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#11
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YT did a recent design upgrade to further strengthen the rocker. Make sure you get the new design. You can tell because the location of the "1.7" is to the right side of the pushrod cup as you look at them from the roller tip end. Here is a link to show the differences: Link
#15
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Just the standard LS Jesels, exhaust ones were breaking while cruising around.
#16
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Last edited by vettenuts; 12-05-2012 at 03:50 AM.