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| 1.6 rockers vs 1.52 rockers - pros and cons (Page 6/6) |
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Raydar
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MAR 10, 10:56 PM
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| quote | Originally posted by lou_dias:
I believe there are two '260' cams...from different manufactures with different specs. I believe the other one H-260-2 has .427" intake lift with a 1.5 rocker arm...and the exhaust is similarly reduced to .454" over the H-272-2 cam.
http://www.engine-parts.com/GMV6/28camspecs.html
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^^^ This ^^^
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Raydar
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MAY 30, 07:34 PM
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Edited -
Please disregard.
Excessive headspace.  [This message has been edited by Raydar (edited 05-30-2015).]
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DevastatioN
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JUN 01, 08:32 AM
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You can recommend me full rockers for my engine? buick 3.8 vin1. Thanks.
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jjd2296
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DEC 04, 10:10 AM
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| quote | Originally posted by lou_dias:
I believe there are two '260' cams...from different manufactures with different specs. I believe the other one H-260-2 has .427" intake lift with a 1.5 rocker arm...and the exhaust is similarly reduced to .454" over the H-272-2 cam.
http://www.engine-parts.com/GMV6/28camspecs.html
Also, years ago, I used a Compucam 2030 and made 142 rwhp and 203 ft*lbs of torque with a mildly ported intake and heads with Sprint manifolds on a 3.4L build. the H-260-2 cam made 149.8 RWHP and 199 ft*lbs on another build with the same heads and intake.
All with 1.52 Magnum rollertip rockers...
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so if I have a 260H cam can I switch to 1.6 roller tip rockers without upgrading any other components? ie springs or push rods?
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lou_dias
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DEC 04, 02:37 PM
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| quote | Originally posted by jjd2296:
so if I have a 260H cam can I switch to 1.6 roller tip rockers without upgrading any other components? ie springs or push rods? |
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https://www.fierostore.com/...px?s=52848&d=194&p=1
Those support .5" which you'd be at about .484" on the exhaust. I'm using them with a .480/.480 roller cam...
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pmbrunelle
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MAY 12, 12:50 PM
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| quote | Originally posted by lou_dias:
No they are not. The ones I listed from Summit worked fine. They are "narrow body" style.
My motor:
If you are truly worried about clearance, you can always run the gasket from other 2.8 motor as an "EXTRA" one - I'm talking about the thin flat one that looks like someone scrammbled cardboard and rubber together...
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If these rockers fit the stock valve covers, why did you eventually make valve cover spacers? Did something change?
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BillS
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MAY 12, 06:29 PM
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I used Comp Cams roller tip rockers in my 3.2 turbo build with a Crane 272 cam and it worked very well. Had Ross Racing flat top forged pistons - no clearance issues.
You will get a bit more wear despite the roller tips as the stroke is longer and it pushes a tad sideways at the extreme so results in guide wear a bit more than a stock cam will.
Ran it for 10 years, sold it, and as told by the buyer that it needed guide replacement when he had it looked at.[This message has been edited by BillS (edited 05-30-2022).]
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