Shims or a 7.370" pushrod?
11-19-2003, 07:04 AM
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Shims or a 7.370" pushrod? Does anyone know where I can get some 7.370" pushrods? Do they even make them in increments this small? If not, what can I use to shim the stock rockers.020"? Thanks.
11-19-2003, 10:37 PM
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Originally Posted by strokedls1
Comp Cams sells shim sets with 15 and 30 thousandths.
They told me to buy there damn adjustable rockers. I know they make them for valvesprings but those are a bit too big for the rocker stands.
11-20-2003, 01:01 AM
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Just run a 7.350 pushrod and let it go -- I'm assuming since you DON'T have adjustable rockers, you're still hydraulic -- I'm betting your lifters can take up .020 
Heck I've been running 7.350's for three years now..
Heck I've been running 7.350's for three years now..
11-20-2003, 06:52 AM
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Oddly enough the 7.350's were just fine with this same deck height and the same heads milled .030". The only things changed that would matter are a new XER cam and Comp R lifters. These lifter seem to want a tiny bit of preload and no more. They are still. With the 7.350's some of the rockers are loose to where you can rattle them with the motor off.
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11-20-2003, 02:32 PM
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I have a 238/240 .605/.609 XE-R in my motor, with the R lifters, 7.350 pushrods, stock rockers no shims.. The heads have been skimmed twice, but not milled (probably around .015" - .020" or so). My preload is right around .005 to .010" so when the motor is cold it chatters its little head off 
Once it warms up, nice and quiet. Makes power clear up to 7k 
Once it warms up, nice and quiet. Makes power clear up to 7k
11-20-2003, 03:40 PM
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Crane also sells those shims. I got some from PAW (Performance Automotive Wherehouse). You need to check the preload on every valve and shim them respectively. The shims are just small rectangles that fit under the rocker rail. Do it right the first time and get rewarded with a quiet engine.
11-20-2003, 08:04 PM
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i did a serch on this all so cause im goign ot be running the comp r lifters, most say just put them on there and let it go like you whould stock lifters, and am told the r are nosy any way i dont know im just going to put them in and tighten them like stock wit hthe 7.4 push rods
