Help me select a cam please

[rcottick]

well in light of my recent issues with discovering my lifter bores on the passenger side are bronzed in not letting any oil get to the lifters, lets help me pick my cam please. It must be a solid cam.

340 with 10.5-1 slugs are sticking out of the holes
factory j heads with slight work on them and 2.02 valves.
block is .030 over
rpm air gap manifold
tti headers

727 trans greiner reverse manual valve body. Trans brand new and heavily modified.
9 1/2 inch ptc convertor should stall around 36-3800

8 3/4 rear with 4.10 gears

give me your thoughts please guys?

Ron

 

[ramcharger]

Just a thought rcottick, but most solid lifters have an "oil metering band" to help deliver oil to where it's needed. I've never done it, but using these in a bushed lifter bore with no oil delivery may cause you some serious problems.

 

[340sFastback]

Just a thought rcottick, but most solid lifters have an "oil metering band" to help deliver oil to where it's needed. I've never done it, but using these in a bushed lifter bore with no oil delivery may cause you some serious problems.

Are these solid lifters intended to be used for push rod oiling? My understanding is most modern lifters support push rod oiling even though the LA engines have shaft mounted oiling for the rockers.

 

[mopar3762]

first off ,was the engine used in circle track racing? if not, why are the left side tappet bores bushed and not the right? are they out of tolerance? maybe you should pop out the inserts and check tolerances.this engine could have been poorly rigged as a circle track car and instead of blocking off the lifter galley the right way the guy may have just used the inserts.I would definitely check the tolerances out on both sides for proper tolerances. If not imo you will need to use a solid with thru the pushrod oiling and rely on the rocker shafts to oil your tappet bores properly, thats very strange setup you have for sure. I would just run the M.P. 528 mechanical .the oilpump dictates the pressure. the thru the rocker type pushrod oiling may provide adequate oil to the lifter bores but its iffy and may drop your oil pressure and decrease life of the valve train and the guides. sounds like a circle track car restrictor done on the cheap .

 

[2 Darts]

I agree that the oiling problem needs to fixed first. Having a lifter sieze up tends to spoil the driving experience.
With the compression and rear gear you're running a cam in the 225-240 duration @ .050 range will work best. Port matching recommended.

 

[mopar3762]

thats weird. common sense is the pushrod method will not supply enough oil for the lifter bore as it oils the rockers. the lifter galley passage oils the shafts, which oil the rockers which oil the lifter galleys.pull them pos out, mike out the lifter bores on the problem side.my bet it was a jury rigged circle track engine and if ya install a mech cam wheres the oil going to come from to adequately oil the lifter bores? it will work with a mech cam but expect premature wear on the upper end and burnt guides and pushrods.first time for me, and no, noone sells the drilled lifter sleeves, so ya can buy new ones and drill them yourself to specs .guy who did this was a real moron, sorry, maybe someone else has your answer. it appears to me you are setup for a roller cam .to use 1 you need an aluminum bronze distributor drive gear and hardened shaft. apparently the car was run with a true roller cam so along comes the needed requirements for a roller as the solid wont work in the long run.my advise would be to call a good machine shop and see what needs to be done to remove these bronzed lifter bores or run a roller cam. he went the exp. route and should have just done it the right way. Ill get the info you need but from my point of view its a roller cam or a larger lifter size which is kinda senselessand probably not available but im not sure,ill reply again today with whats up. soon .

 

[mopar3762]

ok. heres the word. first off all mopar lifters are the same diameter,you will have to find a very competent machine shop and check the outer diameter of the sleeved lifters. highly unlikely they used a chevy lifter instead which is smaller. option 2 is drill the holes for the hyd lifters through the sleeve. option 3 is run a solid or roller but expect premature failure of the valvetrain. sorry, but thats all I can help you out with. he should have drilled the galleys out instead of sleeving the lifters.never heard of this before and theres 2 on this forum.