Roller Rockers
12-10-2002, 12:10 PM
#21
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Location: st. clair shores mi ,us
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IMO ,
Jesel is the only way to go ! Yes they are pricey but you get what you pay for.
No stud girdles to deal with and the lash does not change(unless you have a lifter going away!)
Harland Sharp would be my next choice then Crower.
Jesel is the only way to go ! Yes they are pricey but you get what you pay for.
No stud girdles to deal with and the lash does not change(unless you have a lifter going away!)
Harland Sharp would be my next choice then Crower.
12-10-2002, 01:17 PM
#23
I happen to use Crane Gold, Im not a strong supporter but havent had any problems, I have with imitations. Ive seen a few Cranes blow up in friends engines but they were running very high spring pressures. I figure there are a huge amount of these Crane Gold Rockers running in Merc engines and within reason, they must not be too bad. I have heard that Harlan Sharp are good. I wonder why Merc never used them, probably quantity discounts from Crane or something. What does Merc use in their big HP engines?
12-11-2002, 08:18 AM
#24
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Originally posted by cheitman
I ran Scorpions on a solid flat tappet SB and got less than an hjour of use before the pushrods actually started wearing a hole throught he back of the rockers sending shavings through a new motor. I had to claen the block and replace all bearings. I WILL NEVER USE CHEAP **** AGAIN!
I ran Scorpions on a solid flat tappet SB and got less than an hjour of use before the pushrods actually started wearing a hole throught he back of the rockers sending shavings through a new motor. I had to claen the block and replace all bearings. I WILL NEVER USE CHEAP **** AGAIN!
I've been to their factory in Fort Lauderdale.
Not taking up for Scorpion but don't want to see them bashed unjustly.
12-11-2002, 09:30 AM
#25
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Originally posted by Dixie Doug
I've been to their factory in Fort Lauderdale.
I've been to their factory in Fort Lauderdale.
Mark/KAAMA
12-11-2002, 09:32 AM
#26
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Has anyone had any expereience, or used the "newer" Jesel sportsman series rockers ? I think they go for about 1/2 to 2/3 the cost of what the originals were ?
Just curious
Just curious
12-11-2002, 09:57 AM
#27
RAGTOP409 has a good question on the floor?!
I have the same question
What is the pros and cons to going to the 1.8 rocker verses the 1.7? If there is not a problem then who would want the stock 1.7's on a stock motor?
Are we getting into too much duration and lift for wet exhaust on a stock motor?
I have the same question
What is the pros and cons to going to the 1.8 rocker verses the 1.7? If there is not a problem then who would want the stock 1.7's on a stock motor?
Are we getting into too much duration and lift for wet exhaust on a stock motor?
Last edited by OPIE272; 12-11-2002 at 10:00 AM.
12-11-2002, 10:43 AM
#28
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I do have a set of 1.8 ratio Crane Gold roller rockers for sale with only 50 hours on them ($195). They will give you about .035" more lift and maybe something like 25% of one degree of duration. If you are running a stock cammed engine you will usually benefit by installing 1.8 ratio rocker arms on the intake side. Benefit is usually about 15hp. My engines don't really need them cuz I believe my cam is a hair too large anyway. I was considering buying/trying the Scorpian brand rockers in 1.7:1 ratio---just haven't heard much about them.
12-11-2002, 10:48 AM
#29
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Opie272 / ragtop409:with a big block the 1.8 rocker puts the push rod cup closer on the fulcrum to the stud this can cause the push rod tube to rub on the head in some motors. That is the only drawback, with a little mild machining your ready to go. I run 1.8's and never had a problem.
26scarab: jesel does make a good product, but on a bbc stud girdles aren't madatory for harland or crower, although recomended on higher hp applications. I believe jesel rockers also offer a stud girdle.
kaama: steel rockers are allitle more expensive than alloy and would be stronger if cast like an alluminum rocker but what alluminum as a metal lacks in strength the make up in design. Harlan drockers have been tested against stainless in varieties of break tests and actually both rockers broke at almost exactly the same pressure.
26scarab: jesel does make a good product, but on a bbc stud girdles aren't madatory for harland or crower, although recomended on higher hp applications. I believe jesel rockers also offer a stud girdle.
kaama: steel rockers are allitle more expensive than alloy and would be stronger if cast like an alluminum rocker but what alluminum as a metal lacks in strength the make up in design. Harlan drockers have been tested against stainless in varieties of break tests and actually both rockers broke at almost exactly the same pressure.
