I'm ready to order a solid roller for my BB 427 for my 66 Chevelle Pro Street project. This car is a seldom driven street car and using good fuel isn't a problem...that said here's my combo:

LS7 Block
ZL1 TRW 12.1 Forged pistons( Valve notching needed?)
Forged crank and rods- ARP fasteners
AFR 305 heads CNC chambers
Weiand Stealth intake
Holley HP950 (AED mod.)
4.11 Gears
3800+ Stall Converter
Isky Red Zone Lifters
RPM Range 3000 to 7000

I want to use a UDHarold/Lunati grind. Costom grind is OK if that's what will work best. Here's my list of cams I like:

Lunati 502A5 255/264 685/680 108 or 110 LSA
Custom Grind 266/272 678/688 108 or 110 LSA
" " 264/264 660/660 108 OR 110 LSA

I want a hard hitting power, so I'm leaning toward a 108LSA??? I want a mean idle with good midrange power. I need some opinions!!! Hopefully Harold will stop by!! Thanks!! Cary

WOOPS! Double post....Sorry

Cary,

I'd get the 502A5LUN, cut on a 108 LSA. Lots of mid-range pull, good top-end. Make sure you have a good fuel system, as it will easily rev over 7200....
It will also have the idle you want, and it is usable for 125-150 mile (each way) road trips, although the 4.11s will cut any thought of gas mileage.
Depending on weight, should run low-11s, maybe high 10s...

UDHarold

Harold
Thanks for the reply! The 502A5 was my first choice. Will I have valve to piston clearance issues with the OEM TRW pistons? I think the intakes will be OK, it's the exhaust's I'm worried about? Anyone else have any opinions?? Thanks Cary

Any opinions on the P to V clearance issues with OEM TRW 12.1 pistons??? Thanks

How about a voodoo? Would not closing the valve on the seat in a much easier fashion reduce valve train harmonics and preserve the seat?
Edit: It seems no mech rollers exist in the voodoo line. Too bad. Softer close appeals to me.

Cary,

There should be no clearance problems with this cam on a 108 with a 12:1 piston, however, you should always check piston-to-valve clearance. No one can garauntee that there would be absolutely no problem. The .050" durations and the LSAs govern the piston-to-valve clearance. A cam on 108 LSA will have more problems than one on 112, a 255/264 at .050" will have less problems than a 264/272 at .050".
Besides, Lunati grinds the cams 4° advanced, so the actual centerlines are 104 and 112, and it will run just fine even on 102 and 114. The exhaust piston-to-valve is most critical, and by having the cam advanced, the exhaust valve is moving AWAY from TDC, therefore more piston-to-valve clearance.....

ejrempel,

Solid Mechanical rollers exist in the VooDoo line, it's just that HQS wants the order of release to be: Hydraulics, Hydraulic Rollers, Solids, Solid Rollers.
The hydraulic rollers should be released within a couple of weeks, as soon as we get verifying dyno data. Solids are right behind. We are still 'discussing' the specs on the solid rollers. I posted earlier on Team Chevelle a couple of designs I had done, with real gentle closing ramps, etc.
Mike at Lunati(My right-hand man at UD for 19 years...) shipped out the first 2 BBC 'K' series rollers today. He told me they were AWESOME-looking, and that's from a man responsible for UD's quality, etc, for 19 years.
They're going into a pair of 540s. If there's a dyno test, I'll see if I can post it.
Specs are:
310/318 at .016"
277/285 at .050"
198/206 at .200"
.708"/.708" gross valve lift, about .690"/.690" net.
I think these were on 110 LSA, for 'good mid-range torque'.....
The 'K' series are my 288/296R replacement RACE cams.....

UDHarold

XR292R cam from Comp. 254/262 660/666 lift on 110lsa

With around 3200-3600 weight and decent traction it will peform in the low 10 high 9.

If converter and traction is up to it.

Can take thousands of miles. Never adjusted just checked valves.

Well, Harold, my engine builder told me that my 781 heads were awfully porous, and for sure that Comp supergas shaft is going to be hard on seats, so dollars to donuts I'll get you to choose one for my 11.75 to 1 427 {634 hp @7100 rpm} If it's strong in the middle, might even be faster in the car, forget the dyno.{thanks for the threadspace, HiRevs}