[lust4speed]

Just an idea, but the Stump Puller doesn't put much demand on the valve train, and it is easy to slightly increase installed height by using +50 valve locks. They will move the retainer .050" higher and take the installed height from a nominal 1.750" to 1.800" if you're interested. Just be a little less stress on the valve train if the main purpose is terrorizing the street.

If you are doing the work yourself, I'll bet that you will be surprised at the variation in installed height of the current springs. Most shops just don't care to get even close to their goal.

[Skip Fix]

Like Mick said check the spring tension. My IH were all pretty close. My 99893s to get 140-145 were closer to 1.75-1.770 like Darby said. I probably got a little too anal and checked inners and outers separtaelty and matched them to try and get closer to all the same. Still had 2 springs softer and need a click more shim.

Competition Products sells a 99893 spring also about the exact specs also.

[1funride]

Can someone post the cam cards for the comp grind and the SD for the stump puller

[Navy Horn 16]

Quick Question:

By "Hybrid Roller Setup", you mean "Solid Roller lifters, on a Hyd roller cam."...correct?

If so, that's the road that I am about to travel as well. A friend had a set of Edelbrock heads that had never been bolted on, but the boxes showed they has originally shipped from Kauffman Racing. I called those guys up, and they were very helpful with the specs on heads. It turns out they were ported to flow at 325, 2.19/1.66 valve set-up, SOLID roller valve springs, and milled .070 for a 60cc combustion chamber.

We relayed all those specs to our friends at Butler Performance, and they said we should be good to go with solid lifters, which should get here today. Hopefully, everything will be installed by the end of next week.

Has anyone else run a similar setup and run into any problems? I know that valve lash is going to have to be set and checked reasonably often. I was running 6X heads prior to this that were milled .020, but this is going to be a huge decrease in combustion chamber size. I'm also going to 1.65 roller rockers from the standard 1.5 stock stamped rocker, so any "loss" in cam due to going with solid rollers should be made up by the rockers. Does all that pass the logic test?

Thanks all!!

[grandville455]

You want your hot lash to not be more than .006 plus your rocker ratio, I set mine at .003-4 cold.

[chuckies76ta]

Originally Posted by Navy Horn 16

Quick Question:

By "Hybrid Roller Setup", you mean "Solid Roller lifters, on a Hyd roller cam."...correct?

If so, that's the road that I am about to travel as well. A friend had a set of Edelbrock heads that had never been bolted on, but the boxes showed they has originally shipped from Kauffman Racing. I called those guys up, and they were very helpful with the specs on heads. It turns out they were ported to flow at 325, 2.19/1.66 valve set-up, SOLID roller valve springs, and milled .070 for a 60cc combustion chamber.

We relayed all those specs to our friends at Butler Performance, and they said we should be good to go with solid lifters, which should get here today. Hopefully, everything will be installed by the end of next week.

Has anyone else run a similar setup and run into any problems? I know that valve lash is going to have to be set and checked reasonably often. I was running 6X heads prior to this that were milled .020, but this is going to be a huge decrease in combustion chamber size. I'm also going to 1.65 roller rockers from the standard 1.5 stock stamped rocker, so any "loss" in cam due to going with solid rollers should be made up by the rockers. Does all that pass the logic test?

Thanks all!!

Are you gonna run Solid Roller Springs with the Hybrid setup? We run the springs setup for a Hydraulic roller cam and then install solid roller lifters.

Charles

[Navy Horn 16]

Yes, I was planning on keeping the solid roller springs. If I changed springs, I wouldn't have to change lifters.

The heads were already on the car (but no valley pan or intake) when we found out about the springs being for a solid roller and not hyd roller. I guess it is good that we found out when we did and nothing got torn up. Still, it cost me $414 to fix.

[tom s]

FYI,Comp told me about 12-13 years ago that when you put solid rollers on the hyd roller cam to treat it like a solid.They had me set them up with 200 on the seats.I have been doing it that way ever since.They said to error on the highside always.FWIW,Tom

[72LuxuryLeMansLa.]

Originally Posted by Navy Horn 16

Yes, I was planning on keeping the solid roller springs. If I changed springs, I wouldn't have to change lifters.

The heads were already on the car (but no valley pan or intake) when we found out about the springs being for a solid roller and not hyd roller. I guess it is good that we found out when we did and nothing got torn up. Still, it cost me $414 to fix.

If you have heads set up for a solid roller cam why go hybrid, buy a solid roller cam!

[Navy Horn 16]

The cam in the car has less than 2000 miles on it. I didn't intend to change the heads when I got it back on the road a few months ago, but got a fantastic deal on them (plus headers, rockers, all the gaskets, and help putting it all on). I got all that for less than what Kauffman charges per head with this setup, so it was to good to pass up. With the lifters and having to get tall valve covers and new gaskets for that (plus some other consumables), I'm already $500 more into this deal than expected.

It should run like a SOB the way the it is, and the less aggressive cam should be easier on the valves. At least that's what I tell myself to keep from breaking out the checkbook and further delaying the project. The weather is supposed to be nice here in the FL panhandle in a couple of weeks, and I want to get out and cruise.

[Steve C.]

Stump Puller cam card here.....

http://forums.maxperformanceinc.com/...uller+cam+card

And yes it also should have additional spring pressure if used with solid roller lifters.


.

[Rodney R]

A couple people have questioned my installed height on the springs. To put everything in one place, here's what I've got:

Current IH of 1.670 achieved with 0.030 shims. I'm removing those and using a +.050 lock, so 1.670 +.030 +.050 will give me an installed height of 1.750 with the 99893 springs I ordered.

The springs and locks are out for delivery today and I'm anxiously awaiting their arrival but I think that goes without saying. I tore the top end down last night and removed the lifters, starting to get really excited!

[1funride]

Thanks for the link to the stump puller cam card. That cam doesn't seem big and with 112 LSA I am surprised it has such a nice lope at idle in a 462.

[leeklm]

Originally Posted by 1funride

Thanks for the link to the stump puller cam card. That cam doesn't seem big and with 112 LSA I am surprised it has such a nice lope at idle in a 462.

Keep in mind that SD redesigned the Stump Puller cam. The new grind has a gross lift closer to OF, but same duration as old SP. The card referenced below looks like the "old" grind.

I ran this new design in my 10.5:1 KRE head 455, and was very mild with no real lope. My new build will use this cam in a 9.4:1 iron head motor, which should give it a little lope due to the lower static compression. (I think).

[Rodney R]

The lifters just arrived and I've been checking them out. I noticed the odd position of the oiling hole and searched on here to find that they're edge orifice oiling. Don't see any problems noted on here about issues with the type of oiling it uses, just wondering if you have to do anything special with these to supply enough oil to the heads?

[chuckies76ta]

Which lifters did you get.

Charles

[Rodney R]

Crower 66260H-16

[72LuxuryLeMansLa.]

Originally Posted by Rodney R

Crower 66260H-16

Do they include instructions not to clean them with solvent but to soak them in oil for 24hrs prior to installation?

[Rodney R]

Karl,

They give the following instructions

• Do not wash your new lifters. This will remove the pre-lube in the bearings.
• Soak all used lifters in motor oil prior to reinstallation.
• During teardown, rotate bearings with thumb. Check for smooth, consistent feel. If bearing(s) rotation is rough, replace lifters.
• All V8 applications must install lifters with the link blades facing the center of the block.
• Under no circumstances should the oil feed hole in the lifter body enter the oil galley. This may cause excessive overhead oiling and possible damage to the bottom end

Cool, looks like I just answered a couple questions by referring back to the list. If I understand the first bullet correctly, they don't need to be soaked for initial installation, only for subsequent installations. The last bullet point states the oil feed hole shouldn't enter the oil galley so I guess there's enough oil that leaks out of the galley to make it to the oil hole and provide oil to the heads.

[Rodney R]

Well I got the pushrods in today and set cold lash at .004. Another thing I'm glad about is my tight rocker travel I achieved as well when I put the engine together. There's about 1000 miles on it and the valve train geometry looks spot on. I went ahead and marked the top of the valve with a dry erase marker, set lash at 0.000, and rotated a couple times to make sure geometry is still good. There's a slightly darker area where the rocker was, still looks great. Will hopefully be getting the radiator in tomorrow as well!