He's got HYDRAULIC ROLLER LIFTERS....
What Head? Cast iron or aluminum?
Speaking of "on the money" with that angle how are the lifters and rockers holding up? Also which roller lifters you use? Also did you have your lifter bores bushed?Yeah my push rods are Comp Cams off the shelf hollow too same size as Ford 302. But Comp makes many many different off the shelf size push rods. Keep in mind my cam is custom ground with extremely small base circle and my heads are milled too. Not likely others would use the exact same size push I use. Plus with the Comp Cams Pro Magnum rocker arms you have to have the push rod length right on the money or the oil feed hole to the rocker arm adjuster will get blocked.
Brian at IMM spec'ed out the cam and had it ground for me. Same cost as an off the shelf cam for the most part. He had to have a second cam ground because my block was so sloppy we needed a smaller base circle cam then any engine he had ever seen. No cost on the retry either.
Now that's great service. I've never heard of a company regrinding one for free when the problem wasn't their fault.
The fault was the sloppy casting of the block. Some blocks have problems some don't. Its a '71 340 block.
He's got HYDRAULIC ROLLER LIFTERS....
So does the one I pictured. It has stock replacement hydraulic rollers, factory LA block, Crane hydraulic roller cam, Edelbrock heads. I'll grab fresh pictures as I'll be reassembling the top end this weekend.
340s issues came from using a flat tappet block and wanting to run the hydraulic roller lifters. It had nothing to do with pushrod length and the pushrod angle that resulted are gentler than the factory roller blocks because his lifters are deeper into the block w/the smaller base circle.
Added pics... RPM heads, LA roller block and hyd cam w/stock lifters, Isky rockers.
Dave,
You wrote that and it looks like it had a flat tappet installed from the way it was written and the way I read it. Seen lots of roller blocks with flat tappets installed in them.
This may also be a deal where different rockers have varying points where the pushrod hits the adjusters, further from the rocker shaft c/l. I've never had one, especially with 1.6 LA rockers, not have an issue with the PR hitting the holes on ede heads and the valves weren't sunk. Even the 1.5 Cranes I had were a PIA to get clearanced.
The ones I've done have all been 88-92 roller blocks, not the early retro fit stuff.
I can't speak for that but I can tell you, there is no going back to flat tappet cam in this motor (at least not for me anyway). If I ever sell the car I'll let that person know about it before hand.not to sound stupid, but once you clearance the pushrod holes, lets say you go to a flat tappet cam after with the same heads- will you have excessive play of the pushrods now because the holes have been enlargened?
not to sound stupid, but once you clearance the pushrod holes, lets say you go to a flat tappet cam after with the same heads- will you have excessive play of the pushrods now because the holes have been enlargened?
no..the pushrod holes do not guide the pushrods on a LA mopar...the rocker can not move since it is located on a shaft...there for the pushrods will not move..
I think because you started off with aluminum heads they just took care of it. I was just going to use my x heads and work with the cast iron like that is what threw the brakes on. This is why I'm switch to aluminum heads.
I think because you started off with aluminum heads they just took care of it. I was just going to use my x heads and work with the cast iron like that is what threw the brakes on. This is why I'm switch to aluminum heads.