c5z16z

will 3/8 pushrods fit ls6 heads ?
and if they do what lifters will work ?
i was thinking morel lifters ...

street driven
looking at a 236 240 .600 .600 113 lsa cam

and what springs would you recommend ?

also can i have the heads milled a tad with this cam ?

JakeFusion

iTrader: (7)

Nope 3/8 wont work without clearancing. 11/32 fit...

c5z16z

ok i can clearance them at the machine shop.

can i run comp r lifters or any similar lifter?

outkast6991

iTrader: (34)

3/8 with tapered ends fit my 243's with no work needed

vettenuts

iTrader: (4)

Read the fine print on the Comp R lifters. They have a very tight preload requirement and Comp recommends adjustable rockers. I would go Morel any day over the Comps.

vettenuts

iTrader: (4)

Are you running double or single taper?

JakeFusion

iTrader: (7)

I've heard the double taper might work, but it'd be close. I'd buy just one and see.

I'd also look at short-travel lifters if you want to run light preload. Comp, Johnson, and Morel all make good short-travel lifters...

chrs1313

iTrader: (24)

3/8" pushrod is really not needed if you have a good spring...

I did back to back tests with 5/16" .080 wall vs 11/32" .120 wall and the graphs were identical...500rwhp NA 346 setup, with heavy 110gram 2.04 intake valves...

Graph would still drop off fast after 6800rpm...it didn't pull clean an stable till I switched to the ls3 hollow stems...84-86grams iirc...picked up power and stability...

JakeFusion

iTrader: (7)

Spintron testing shows 5/16 looks like a spaghetti noodle at high RPM.

outkast6991

iTrader: (34)

They are double tapered. 7.250 in length with stands milled .040 to bring the wipe inboard. Car has since been sold but I ran that setup for about 8,000 miles. No witness marks at all and a very quiet valve train with PAC 1519's. new owner switched to 1206's and its still pretty quiet, comparable to stock

JakeFusion

iTrader: (7)

Were they Trend or Manton?

Gray86hatch

iTrader: (83)

I used 11/32 .120 manton

A push rod is not going to fix the fact you had a heavy valve and not enough spring to control it.

With the proper springs and weight valves a bigger pr is not going to hurt you.


Tim

dr_whigham

iTrader: (49)

I'd go with Tooley's Platinums with the titanium retainers before the Lunatis.

Gray86hatch

iTrader: (83)

I have had good luck with the lunati kit on my car and dads car that gets drove everyday 15,000 miles.

Tim