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-   -   Rocker roller coversion for 502 - push rod length? - need valve train expert (https://www.offshoreonly.com/forums/general-q/336611-rocker-roller-coversion-502-push-rod-length-need-valve-train-expert.html)

getrdunn 04-24-2016 10:04 PM

Put it this way I've seen much worse. I doubt your valve will know the difference. I'd guess probably about .050 would correct it but again, considering your spring pressures etc you'll be ok. I like to try and get perfect every time But is it absolutely necessary if your off a little??? If you were near the edge of the tip I'd without a doubt change them but your in the go range as far as I'm concerned. Proper geometry is essential. Just an FYI Running to close to the edge can cause premature guide wear as well.

Cap'm Kurt 04-24-2016 10:42 PM

Funny you mention than.050 getRdunn because that's exactly the amount my current rods are longer than the spec that mercury gave me for my serial # motor.
In the interest of time trying to make the Tickfaw 200 in baton Rouge, La soon, instead of waiting a couple days, i may see if i can borrow a pushrod checker tomorrow and see if that .050 is what it needs, before buying a set.

MILD THUNDER 04-24-2016 11:50 PM


Originally Posted by mike tkach (Post 4432036)
sb,if you look at their list of supplier,s you WILL see speedway on it and they look EXACTLY like the ones speedway sells.i would keep the stock gm rocker arms before useing the pro comp/speedway JUNK.jmo.

Looks like PRW is another supplier to engine pro too.

Their rockers also look like these

https://www.prw-usa.com/product/0245...hevy-173-x-716

SB 04-25-2016 05:48 AM


Originally Posted by mike tkach (Post 4432036)
sb,if you look at their list of supplier,s you WILL see speedway on it and they look EXACTLY like the ones speedway sells.i would keep the stock gm rocker arms before useing the pro comp/speedway JUNK.jmo.

Procomp's new name is Speedmaster, not Speedway.

EnginePros. Speedways, PRW's (in the $300's) are much more expensive than the ProComp/Speedmaster's.(in the $100's)

Edit it: Yes, they look very similar. And I would love to find out iof the same as the Procomp/Speedmaster's. But no solid proof yet. But, if they suck, which by this thread it looks like they do (ie: the OP's issues) than all one of the same anyway ie: stay away from junk.

sutphen 30 04-25-2016 05:53 AM


Originally Posted by SB (Post 4432070)
Procomp's new name is Speedmaster, not Speedway.

EnginePros. Speedways, PRW's (in the $300's) are much more expensive than the ProComp/Speedmaster's.(in the $100's)

Edit it: Yes, they look very similar. And I would love to find out iof the same as the Procomp/Speedmaster's. But no solid proof yet. But, if they suck, which by this thread it looks like they do (ie: the OP's issues) than all one of the same anyway ie: stay away from junk.

man,there must be a full time guy at that company who's only job is to apply for new business names.unbelivievable how the name the company close to well established one,then sell junk.

MILD THUNDER 04-25-2016 06:31 AM

3 Attachment(s)
If you look at the Crower steel rocker, the PRW steel rocker, the old comp cams steel rockers, Speedmaster/Procomp rocker, they all about look the same at first glance.

The fulcrums are large in the steel rockers arms, compared to an aluminum rocker typically

SB 04-25-2016 07:15 AM

Here you go...lol
http://www.alibaba.com/product-detai...614033130.html

hotrodford 04-25-2016 07:35 AM

like your line mild that's some funny reasonning

mike tkach 04-25-2016 08:10 AM


Originally Posted by SB (Post 4432070)
Procomp's new name is Speedmaster, not Speedway.

EnginePros. Speedways, PRW's (in the $300's) are much more expensive than the ProComp/Speedmaster's.(in the $100's)

Edit it: Yes, they look very similar. And I would love to find out iof the same as the Procomp/Speedmaster's. But no solid proof yet. But, if they suck, which by this thread it looks like they do (ie: the OP's issues) than all one of the same anyway ie: stay away from junk.

yes it is speedmaster,not speedway.i guess mistakes like that happen when i post after a afternoon of boating and beers.

Cap'm Kurt 04-26-2016 07:56 PM


Originally Posted by SB (Post 4432098)

yeah THAT's what I need. haha
thats some cheap stuff!


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