I have had a set of Mast med bore heads on order for over 2 months now and they keep pushing it back each week. Anyway I told them I wanted them set up for around .700" lift and I was told they could set up the PAC 1221x dual springs with stock LS3 rockers to do the job. I sure hope when I get them I dont have any spring problems.

 

Mine took like 5 days... The 1221x is good to .700 so I see no issues there. I got the stands for stock rockers as well, just in case I decide to go that route.

Did you get the lighter intake valve option?

 

Any valve guide issues running the stock rockers with these heads? Also, why are you worried about the pac 1221?

 

None at all, according to Mast and several other folks.

 

Nice. I was seriously considering them again, but now I'm hearing 3+ month wait. That's insane. I need heads no longer than 1-2 months from now.

 

Contact Kip at Cam Motion. You'd be surprised the strings he can pull

 

Kip is the only guy I deal with when it comes to valvetrain. Not bashing any of the other cam and valvetrain experts on here. Kip has just gone above and beyond to help me, so I will buy whatever I can from him.

 

So... Lifters....

If I go hydraulic it'll either be Johnson link bars,

http://www.briantooleyracing.com/joh...s-2116lsr.html

or Morel 5206 link bars.

For solid lifters, does anyone have opinions or experience with the Morel 5452's?

http://www.briantooleyracing.com/mor...r-lifters.html

 

So you haven't rulled out going solid roller? My opinion on that is this; everything you will be looking to achieve can be done with a hydraulic roller cam. Plus, it will be much easier to maintain. Unless you plan on spinning this thing to the moon and back, or seriously considering making a ton of track passes, I would personnaly go with a hydraulic roller cam.

 

Kip is really singing the praises of these low-lash solid rollers setups. He runs it in his daily. If I could decide on some RR I'd already be running them.

 

I went with the Jesels for my low lash. Get them from Cam Motion. In fact. I got my entire valve train from Kip. It was like Christmas when I opened that box!

 

They don't make the Jesel Sportsmans for my head. It would have to be the either the Jesel Mohawks, T&D's, and honestly I don't even know if the Crowers would fit.

 

I don't think the Jesel Sportsman's are adjustable?

 

I actually can't tell from the picture if those are Sportsmans or Pro Series - Solid Body.

They're both adjustable...?

 

Funny you all should bring that up. They did not come with instructions or torque specs, so I just went to download them online. Since they were adjustable and the only instructions for adjustable are for Pro-Series, I used the Pro-Series torque specs. So I torqued the rocker shaft bolts to the pro-series specs of #37 and broke the first bolt I attempted to torque. So, I dug a little deeper. Turns out there are adjustable sportsman series (which is what I have). But, the Sportsmans use grade 8 Torx bolts while the Pros use ARP bolts. Guess what happens when you torque the grade 8 Torx to #37 instead of the #27 recommended for the grade 8 Torx.

 

I'll take "**** you off and a lost tool in the woods for 1200, Alex"

 

As far as valve springs, it would be best to who ever is doing your cam to set up and suggest the right valve springs, installed height in accordance to intended application. Most of the time, valve springs that already comes with heads from manufacturer may not be the right springs for your cam.

 

Nah. It just meant the momentum stopped on the project until FedEx could do their thing. Sux when you are on a roll to kill the momentum.

 

True. Depends on who I go with for a cam. Ed likes (for the intended lobes) around 155# minimum on the seat. I ALWAYS shim to within .050 of coil bind anyway, depending on how much room I have at current install height vs how much pressure will increase with shimming. I don't want "too much" either.

At their current height of 1.8 I have 160# on seat and at 1.150 it's 424#, at a rate of 408.

I've got some room to play there, but more than likely won't have to touch them.

I will however discuss some things with some individuals and see about going a true solid roller and maybe ripping them off in favor of some a lot more robust.

It's really me needing to research more on who has good results (cam) with square ports. I know Ed has a particular line of thinking on this, and Martin has pretty much come up with the same idea. It wouldn't surprise me in the least if the intake duration was in the teens... But that's hydraulic roller. Idk how or if that changes for solid.

5206's seems so easy at this point, but hell, I've already went as far as putting a gen4 head on. Might as well go "all the way" and be as outside and far away from "the box" as I can get.

Keep it rolling guys. I like the discussion back and forth. This is where ideas are sparked from.

 

Dave, whoever you have grind the cam, are you going to let them know that you may throw a supercharger on at some point, or are you doing this build strictly with NA in mind?