What is the most lift you can get with long slot rockers? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-09-2009, 01:16 AM
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What is the most lift you can get with long slot rockers?

I have a set of 1.5 ratio stamped steel long slot rockers on my smallblock chevy. I have tried to find info on the maximum lift they will allow. Does anyone know? Would they handle .550 lift?

Thanks for your time,

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Old 11-09-2009, 05:42 AM
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Depends on many factors. Push rod length, cam base circle, seat in lifter, deck and head height +.

I always check the clearance with a paper clip. Inserted between the stud and rocker at full lift.
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Old 11-09-2009, 09:44 AM
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long slot, should be fine at .550" if geometry correct. If you need a little more get the carbide burr out. Check with a couple solid lifters if your using a hydraulic.

Last edited by airboat; 11-09-2009 at 09:49 AM.
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Old 11-09-2009, 11:54 AM
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I used long slot rockers with a cam with .557" lift on the exhaust side.

As stated above you cannot take this as the holy grail. Cam lobe base circle diameter, pushrod length and block, head architecture all play a factor.

Mock it up and check for rocker-stud clearanced at full lift.

.550" lift is pushing it for this stamped steel ball stud rocker design on a SBC.

Summit-house branded/Scorpion roller rockers are a great deal.
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Old 11-09-2009, 01:04 PM
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Thanks for the replies. I think I will go with a smaller lift, something around .500. I'm going to play it safe.

Thanks for the replies everyone,
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