GPI Low lash solid roller custom cam setup

[Rhino79]

No. Lol. My ss4 was a tq monster thanks to vvt. This is the sacrifice of a narly 3bolt.

[hamilton2008]

Originally Posted by Rhino79

No. Lol. My ss4 was a tq monster thanks to vvt. This is the sacrifice of a narly 3bolt.

Defiantly no slouch

[Bodywerks]

Originally Posted by 1sick_eg

Once again, nice results Ryan. LLSR is proven once again. Nice job on getting the t&d's to work with the PRC255's. I meant to message you the other day about that.

Well, yes and no. It definitely proves that the LSR can run hard up top. But hp and tq are within single digits of each other compared to others on hyd lifters wth the prc255 heads. I was hoping for at least similar numbers to yours.
I will admit, though, all other things equal, the llsr will likely take them at the track. That super high redline is almost enough to pull through the finish line in 3rd gear. One less shift.

[Bodywerks]

Did the prc heads need to be machined for the t&d rockers? Would this be the same case with the jesels? Just relief needed at the valve cover area right?

[Rhino79]

Originally Posted by Bodywerks

Well, yes and no. It definitely proves that the LSR can run hard up top. But hp and tq are within single digits of each other compared to others on hyd lifters wth the prc255 heads. I was hoping for at least similar numbers to yours.
I will admit, though, all other things equal, the llsr will likely take them at the track. That super high redline is almost enough to pull through the finish line in 3rd gear. One less shift.

Different dynos. Remember this is an auto car not a manual.

My car with the Frankensteins and my llsr made 550/465. Through an auto.

I speced steves cam to rip up top. I have the gear and converter in his car to do that. I could easily have picked up tq and gave up some hp with a different grind. But I want to get this drop top near 10s if not in there. So I built a setup to suit that goal.

Dyno numbers don't mean squat really. Hell he trapped 119 with 450 rwhp. And I see people with "500" plus trapping less than that. Our ss4 hyd cars in coupes run mid to upper 10s at 125 and up at 510 rwhp.

[Rhino79]

Originally Posted by Bodywerks

Did the prc heads need to be machined for the t&d rockers? Would this be the same case with the jesels? Just relief needed at the valve cover area right?

No the rocker pedestals had to be milled off, t and d rails slotted on intake bolt holes and the intake rockers shimmed to move the .040 closer to exhaust valve. It was a pain.

[trw427ss]

Originally Posted by Unreal

Remember that solid cam durations don't equal a hydralic. 248/260 is probably like a 235/248ish hydralic.

The LLSR only has to be about 8 deg. bigger than a Hyd. so an equal Hyd. would be about 240/252.

Originally Posted by 1989GTA

That is a healthy cam for a 376" motor. Looks like he plans on running it to the low 7000rpm mark. By the way the lift also will be less at the valve. You have to consider the lash and the losses in the valve train.

The LLSR uses .010 lash but the valve train losses would be less because of shaft mounted rockers versus stock rockers.

Originally Posted by Unreal

Do ls3 heads have to be machined for the rockers like ls7 heads? If so that is $300-500.

Plus install prices are going to be higher if you are paying a shop, as there is a lot more to the install. I would add 3-4 hours of shop time to a install price to adjust lash, setup rockers, etc.

LS3 heads do not require machining for shaft mounted rockers.

Originally Posted by Bodywerks

Did the prc heads need to be machined for the t&d rockers? Would this be the same case with the jesels? Just relief needed at the valve cover area right?

The PRC heads require machining for shaft mounted rockers (T&D and Jesel) because the rocker stands are built into thee heads and have to be removed.

[Rhino79]

Multi quote beast mode engaged

[Bodywerks]

Originally Posted by Rhino79

Different dynos. Remember this is an auto car not a manual.

My car with the Frankensteins and my llsr made 550/465. Through an auto.

I speced steves cam to rip up top. I have the gear and converter in his car to do that. I could easily have picked up tq and gave up some hp with a different grind. But I want to get this drop top near 10s if not in there. So I built a setup to suit that goal.

Dyno numbers don't mean squat really. Hell he trapped 119 with 450 rwhp. And I see people with "500" plus trapping less than that. Our ss4 hyd cars in coupes run mid to upper 10s at 125 and up at 510 rwhp.

I hear you on dyno racing. I also forgot we were talking auto.
The numbers are starting to add up a little better, but now we are talking and additional, what, $500-600 in machine work for aftermarket heads, on top of the additional $2k for LLSR components?
I was going to just port my stock heads but I want higher lift/higher compression, and that'd require fly-cutting pistons, which I don't want to do.
Guess I'll be sitting on the LLSR sidelines for this build for now. Maybe I'll look into upgrading lifters to squeeze a few more R's out of a hyd. setup - if the stock rockers can take it...

[trw427ss]

Originally Posted by Rhino79

Multi quote beast mode engaged

You said I could state the facts, maybe i went a little overboard! Lol

[trw427ss]

Originally Posted by Bodywerks

I hear you on dyno racing. I also forgot we were talking auto.
The numbers are starting to add up a little better, but now we are talking and additional, what, $500-600 in machine work for aftermarket heads, on top of the additional $2k for LLSR components?
I was going to just port my stock heads but I want higher lift/higher compression, and that'd require fly-cutting pistons, which I don't want to do.
Guess I'll be sitting on the LLSR sidelines for this build for now. Maybe I'll look into upgrading lifters to squeeze a few more R's out of a hyd. setup - if the stock rockers can take it...

It's only the PRC heads that have to be machined for the shaft mount rockers. As far the cam is concerned overlap has more to do with V/P clearance than lift does. I could give you a cam with .700 lift that will clear stock pistons and one with .500 lift that will not clear!

[Fast6.3]

On a daily driver l99 occasional track but lot of street running would you recommend ss3 vvt hydraulic and heads or llsr.

[Bodywerks]

Originally Posted by trw427ss @ Futral

It's only the PRC heads that have to be machined for the shaft mount rockers. As far the cam is concerned overlap has more to do with V/P clearance than lift does. I could give you a cam with .700 lift that will clear stock pistons and one with .500 lift that will not clear!

Yeah, I know. I want >.630 lift, optimal overlap, duration, and cam timing for midrange tq ant top end power, and higher compression(11.5:1 or higher), and I don't want to touch the bottom end whatsoever to do so, including fly-cut pistons. Oh, and >500rwhp and >450rwtq for the dyno races...
Now, is that too much to ask

[SSeniorMoment]

Well it seems like it's taken forever, I've had the parts for about 10 weeks, but Nic D tune is scheduled for August 13.....so, we'll have more LLSR data to compare. Summer temps in Mesa and 91 octane are not conducive to big numbers. My LLSR cam specs are close to those of 1sick_eg, but I'm running an auto with a Circle D 3C...3600.

It may be worth a trip to Baytown during the winter months and get some sea level, 93 octane times.

I'm not holding my breath for the Vararam release, but that would make for a nice combination with the Frankenstein LS3 heads.

Kip asked me what I wanted, told him I wanted to walk 392 hemis and Mustangs at drag strips. Have the Welds (17") and DRs, now it's up to me to deliver.

Have senior citizen will travel.