Offshoreonly.com

Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   We hurt the 496.... (https://www.offshoreonly.com/forums/general-q/383381-we-hurt-496-a.html)

Brad Christy 12-24-2024 08:50 PM

Guys,

https://cimg0.ibsrv.net/gimg/www.off...eff19367a.jpeg
https://cimg2.ibsrv.net/gimg/www.off...dcdc13987.jpeg

FINALLY!

Still have to verify final stack up under the valve covers. I’ve got the 1/2” valve cover spacers, but I sent them out for black anodize and haven’t gotten them back yet.

Merry Christmas!

Thanks. Brad.

liberator221 12-25-2024 06:29 AM

So how did you get there Brad? Just different push rods?

Brad Christy 12-25-2024 03:47 PM


Originally Posted by liberator221 (Post 4916789)
So how did you get there Brad? Just different push rods?

Liberator221,

Yup. It was just a matter of finding the right length. I’m still kinda bewildered how one checks roller sweep with hydraulic lifters that don’t have oil in them, though. :confused:

I haven’t actually laid eyes on them yet, but he’s pretty happy with how they stack up.

I should be able to pick up the valve cover spacers tomorrow, and I’ll run up and verify the clearance under the valve covers. He says we’re good there, too.

Thanks. Brad.

Tartilla 12-26-2024 12:12 PM


Originally Posted by Brad Christy (Post 4916808)
Liberator221,

Yup. It was just a matter of finding the right length. I’m still kinda bewildered how one checks roller sweep with hydraulic lifters that don’t have oil in them, though. :confused:

I haven’t actually laid eyes on them yet, but he’s pretty happy with how they stack up.

I should be able to pick up the valve cover spacers tomorrow, and I’ll run up and verify the clearance under the valve covers. He says we’re good there, too.

Thanks. Brad.

Brad, you can dis-assemble a lifter and use spacers inside to set the desired plnger depth, then use run your sweep testing with a variable length pushrod. You can also use a reduced pressure valve spring, but that only works if the heads are off etc.

Brad Christy 12-26-2024 01:15 PM


Originally Posted by Tartilla (Post 4916837)
Brad, you can dis-assemble a lifter and use spacers inside to set the desired plnger depth, then use run your sweep testing with a variable length pushrod. You can also use a reduced pressure valve spring, but that only works if the heads are off etc.

Tartilla,

That makes sense. Seems like a lot of work, but that's the game isn't it? :faint2:

I've seen videos from Steve Morris where he had the heads installed with REALLY light springs and was setting rocker height (solid mount shaft rockers), so he could just tilt the rockers by hand, then back figure the pushrod length from there. I can't see why one couldn't do the same with stud or pedestal mount rockers. I have no idea the method the builder used to get mine set up. He just texted me a couple pics and said, "All set!" Gonna be running up this afternoon to check it out first hand and verify valve cover clearance with the spacers and the exhaust riser blocks and their wonky plumbing (pics to follow).

I'm getting excited. Final assembly of all the peripherals is in sight. :party-smiley-048:

Thanks. Brad.

Rookie 12-26-2024 08:15 PM


Originally Posted by Tartilla (Post 4916837)
You can also use a reduced pressure valve spring, but that only works if the heads are off etc.

Why do you have to remove the head to change 2 springs out?

buona_merdaOL25 12-26-2024 11:18 PM

Cool parts, curious what the longevity of the aluminum rockers are? Pushrods are definitely key to making it all play nicely

Brad Christy 12-27-2024 11:37 AM


Originally Posted by buona_merdaOL25 (Post 4916858)
Cool parts, curious what the longevity of the aluminum rockers are? Pushrods are definitely key to making it all play nicely

BuonaMerda,

The Scorpions review very well, and the builder likes them. He's used them before. His preference is HarlandSharp, but these were a bit friendlier on the wallet. These Scorpion Race Series rockers are good for 950lbs of spring pressure at full open, and we aren't coming anywhere near that, so I'm not worried about fatigue. He also told me there's a lot more thread engagement with the polylock nut than we initially though, once he had them drawn down on proper length pushrods, so that's not a concern anymore.

Thanks. Brad.

Brad Christy 12-29-2024 05:22 PM

Guys,

https://cimg3.ibsrv.net/gimg/www.off...f4bc8e199.jpeg

Getting there. Inch by inch….

I had to slightly modify the valve cover bolt spacer sleeves to fit into the grommets without ripping/cutting them, and they weren’t with the builder when he took this pic, which is why the valve cover bolts are not drawn down.

https://cimg4.ibsrv.net/gimg/www.off...139533f75.jpeg
These, made necessary by the addition of the valve covers spacers, will properly locate the valve covers and preset the proper squish on the gasket.

Thanks. Brad.

Brad Christy 12-30-2024 04:24 PM

Guys,

https://cimg4.ibsrv.net/gimg/www.off...4be2f144f.jpeg
Through fitting for the new filter head.

https://cimg6.ibsrv.net/gimg/www.off...ae84bf7e3.jpeg
Got the new filter head installed. Hanging the filter, as suggested. For those with a keen eye, yes, the incoming port fitting has since been fully seated and tightened up. This pic was taken right after getting the new holes drilled and it mounted in the new location. As can be seen, the incoming fitting can't go on until the lower left mounting screw is tightened up, and I knew I had to remove the filter head and seal the holes when I get a new tube of 4200.

https://cimg8.ibsrv.net/gimg/www.off...14daafbf1.jpeg
https://cimg2.ibsrv.net/gimg/www.off...0cf86245a.jpeg
https://cimg3.ibsrv.net/gimg/www.off...2ed787644.jpeg
https://cimg4.ibsrv.net/gimg/www.off...c353cdf6f.jpeg
Modified the OEM filter port cap. Opened up the send port for 1/2-14 NPT and made a new through fitting clamp “screw” to be a return port. We now have at least 1/2” passage through the entire oil tract. Builder is going to plug the block ports, however that works. :confused:

Thanks. Brad.


All times are GMT -5. The time now is 03:55 AM.


Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.