[RA462]

Originally Posted by JC455

Or this one:
Basic RPM Range: 2500-6500
Valve Lift Intake: .560
Valve Lift Exhaust: .565
Duration Intake: 290
Duration Exhaust: 296
Duration at 050 Intake: 237
Duration at 050 Exhaust: 243
Lobe Separation: 112
Intake Centerline: 108
Firing Order: 1-8-7-3-6-5-4-2

Thanks for the heads up on this camshaft JC455. I just ordered one for the 433 in my GTO. I didn't know Howard's made them with a 112 lobe separation angle. I hope you guys figure out a lifter that will work. This is a great idea.

[antique69lemans]

I think this idea is really close to working. I would prefer the gm dogbones if they would work. They have closed ends so it would not be possible to slide around as much. Also look at the later gm 3.4 retainer bar. Instead of spider it is much more rigid. The concept of retaining the dogbone with a rev kit style got me thinking.. If you had a rocker stud girdle it could span all the lifters retain the dogbones, have thru holes for pushtubes, and bolt to a crossbar bridging the valley.

[242177P]

Originally Posted by antique69lemans

I would prefer the gm dogbones if they would work. They have closed ends so ...

Jesel has an open dogbone for LS stuff, so I wouldn't sweat "open" too much.

[adynes]

Originally Posted by Scarebird

1997-2000 C3500 w/454 BBC has roller lifters, no tie bar.

https://www.rockauto.com/en/moreinfo...353114&jsn=509

One thing to note about the BBC lifters, the flats run the opposite direction compared to the sbc lifters.

[antique69lemans]

Originally Posted by 242177P

Jesel has an open dogbone for LS stuff, so I wouldn't sweat "open" too much.

Thanks for that pic. That is the concept I had in mind. Wasn't aware of that.

[Scarebird]

Originally Posted by adynes

One thing to note about the BBC lifters, the flats run the opposite direction compared to the sbc lifters.

WTF?

ah, if the lifters are splayed for the valves then rotating the guide 90° makes perfect sense...

[HWYSTR455]

'If', that's a big 'if', and most likely a 'no'. Technically its the lifter bores.

This thread is still going? Take the dive and try it, let us know how it turns out.


.

[Scarebird]

The 1997-2000 BBC lifter showed up today. After a quick check I noted it is simply a 2148 lifter with the guides 90° rotated. Still the same issue with the oil feed hole and body of the lifter sticking out.

[Scarebird]

In the for what it is worth file. I measured the Crane rollers I have, as you see the oil band needs to be 0.300" up higher to engage the oil port in the lifter bore. I am debating whether to rework the lifters I have or run the Crower solids I have.

[HWYSTR455]

So .300 up further is what, from when it's on the base circle?

.

[Scarebird]

Couldn't measure from the base circle - the diagonal lines are the oil feed in the bore. Right side is the top of the lifter bore. The tapered section is the oil band on the lifter - the red line where I need to grind for most oil transfer. 0.300" is a blonde one too much, more like 0.270" will work without breaching the top of the lifter bore.

[242177P]

Originally Posted by Scarebird

I am debating whether to rework the lifters I have or run the Crower solids I have.

http://forums.maxperformanceinc.com/...d.php?t=791233

[HWYSTR455]

Just need to say, IF, you are starting from scratch, and are worried about hyd roller issues, just dang go solid roller. It's no-brainer. The cam ramps are DESIGNED for a solid roller. A hybrid setup just adds overhead. You stand the extended risk of human error.

I like the fact that people are engineering this stuff out and looking/debunking options, but, um, don't you think others have pioneered this path way before we even thought about questioning it?

I just think it's not this complicated, maybe I'm just not as worried as most?

Try it, if it fails, keep going until something works for you. Done.

(sorry if I'm raining on a parade here, but dang, we are talking about a thread that's gone near 100 posts...)

.

[webfoot]

Did anyone ever get one of these SBF dogbone/factory GM lifter motors going? I have (IIRC) the same HR cam as the OP waiting to go in my 400.

[1968GTO421]

Originally Posted by webfoot

Did anyone ever get one of these SBF dogbone/factory GM lifter motors going? I have (IIRC) the same HR cam as the OP waiting to go in my 400.

Yeah, a really good question. (I like post #93)

[RocktimusPryme]

Originally Posted by HWYSTR455

Just need to say, IF, you are starting from scratch, and are worried about hyd roller issues, just dang go solid roller. It's no-brainer. The cam ramps are DESIGNED for a solid roller. A hybrid setup just adds overhead. You stand the extended risk of human error.

I like the fact that people are engineering this stuff out and looking/debunking options, but, um, don't you think others have pioneered this path way before we even thought about questioning it?

I just think it's not this complicated, maybe I'm just not as worried as most?

Try it, if it fails, keep going until something works for you. Done.

(sorry if I'm raining on a parade here, but dang, we are talking about a thread that's gone near 100 posts...)

.

I think the problem with it is you can still find people who poo poo the hybrid idea. People with some clout at that.

I’m not saying I don’t agree with you, but for someone doing their research, when a google search points you to someone with “cam designer” by their name and they are lambasting the hybrid idea......it’s easy to start to question it. I was just doing it the other day because I’m considering a hybrid setup in my BBC.

In my own head trying to rationalize it all, I’m guessing that your average mild to aggressive hyd roller stick, is likely very similar to a mechanical roller stick designed for a tight lash.

[tom s]

Jones cam is one of them.I did the solid on Hyd roller cams years ago but when the lifters got better I changed over and never looked back.FYI,remember when that is done your cam becomes smaller.Comp says you loose about 8 degrees duration plus the lash that is used.Comp told me 6 thou.And Hyd roller cams are not ground with solid ramps.The ramps are designed for zero lash.I was amazed how much more aggressive my old faithful cam acted when I took the solid off and put the Hyd rollers on.Carry on.Tom

[Formulajones]

You'll find many cam designers against the hybrid idea. Harold Brookshire is another one that was against the hybrid idea. He mentioned just as Tom touched on, lash ramp design is completely different as one reason. If you look around the internet you can probably find some of Harold's posts, he shared a wealth of information on his cam designs, very smart guy. Many Pontiac people loved his old Ultradyne stuff, me included.

I'm with Tom and the others. If debating running solid lifters, I prefer to just do the whole deal, change the stick and all. Then you at least will have the ability to have the solid stick ground specific and gain back some of the lost duration you get when putting solids on a hydraulic.

[68hotbird]

I got side tracked on my project with the ford spyder and sealed power lifters but I should be back on it soon. A friend of mine has 5 or 6 of them running that have been done for several years with no issues. I will update when I get mine running.

[webfoot]

Originally Posted by 68hotbird

I got side tracked on my project with the ford spyder and sealed power lifters but I should be back on it soon. A friend of mine has 5 or 6 of them running that have been done for several years with no issues. I will update when I get mine running.

I’m going to pull the motor this fall and change over to a hyd roller, and will give this a shot.