[ORratrod]

I'm going to be measuring for clearances for the bearings, rings, etc.
Does anyone know of a good guide to follow in terms of clearance standards for street engines that see strip time? I'm going to be running a standard volume oil pump with EDM lifters so its important to me to get this right...and for longevity obviously. Any bearing recommendations? v-series, h-series, etc...

 

[Mike]

You might post just what the engine is so we get the specs right.

 

[SWHEATON]

One thing,make sure to install the optional higher pressure oil pressure relive valve spring thaqt comes with most std vol oil pumps.

The edms are good lifters but those the additonal 16 small holes will lower oil pressure by approx 5-10lbs on avg depending in clerances and the opt higher psi spring with make up forthat keeping staus quo.

But you dont need a hi vol pump with edms either and for that matter for most perf setups no matter how hot. The opt higher psi spring used in stock std vol sbc or bbc oil pumps is fine for even the higher perf lvl builds too as long as bearing clearances are correct along with rod side clearances etc too.

BTW,I ALSO SENT INFOTO YOUR EMAIL LISTED HERE IN T/CHEVELL THAT SHOULD HELP YOU HAVE A SUCCESSFULL FLAT TAPPET CAM INSTALL/BREAKIN/AND LONG SEVICE LIFE POST BRWAKIN YOU YOU FOLLOW WHATS SUGGESTED.

GOOD LUCK.

Scott

 

[ORratrod]

Duh...yeah, the engine....here's the jist....
505 BBC
4.25 forged crank...turned .020/.020
scat h-beam rods, floating
SRP small dome 18cc pistons 4.35 bore
Canfield 310 119 cc chambers
*still looking into it, but I should be able to mill these .025 (makes heads roughly 113cc)and deck the block but I'm not sure what quench I should shoot for...the head gasket is .039 thick...I have to make sure my p/v clearance is good on that before I get too carried away...what should I be shooting for on that?
I will be using a HP spring in a stock melling oil pump and using a bypass blockoff and a 2 qt filter. I have a kicked out milodon pan with crank scrapers and baffles. Basically I will utilize the extra pan space for oil control...only run about 6 qts in it.
The cam is UDHarold's...60242...SFT...249/257 dur @ 50 and gross lift with Crane Gold's 1.8 on intake and 1.7 on exhaust is .646/.625
The block is a 4 bolt, ARP studded, already right at .100 over...I think it was ran for a VERY short time before I got it... and I'm going to get it plate honed another .002 to clean it up...will I run into ring clearance issues? even with them being file fit? I havent bought the pistons, my last part to get, and the block sonic checked safe to .125 over....so its not the end of the world if it is questionable.

 

[DRIVESHAFT]

One thing,make sure to install the optional higher pressure oil pressure relive valve spring thaqt comes with most std vol oil pumps.

The edms are good lifters but those the additonal 16 small holes will lower oil pressure by approx 5-10lbs on avg depending in clerances and the opt higher psi spring with make up forthat keeping staus quo.

But you dont need a hi vol pump with edms either and for that matter for most perf setups no matter how hot. The opt higher psi spring used in stock std vol sbc or bbc oil pumps is fine for even the higher perf lvl builds too as long as bearing clearances are correct along with rod side clearances etc too.

The lifters with the edm hole dont change the engine's max pressure requirements, but they do require a higher volume of oil due to more internal "leaks". Why do you think that he should cure a volume problem with a pressure spring?

 

[trmnatr]

The lifters with the edm hole dont change the engine's max pressure requirements, but they do require a higher volume of oil due to more internal "leaks". Why do you think that he should cure a volume problem with a pressure spring?

Why run a high volume on this? Only so much oil can flow anyways

 

[DRIVESHAFT]

Why run a high volume on this? Only so much oil can flow anyways

I didnt say to run a high volume pump. That discussion alone can go on forever.
What I was trying to point out is that running a higher pressure pump spring will only raise max oil pressure. An engine with edm lifters doesnt require a higher max oil pressure than an engine without them, so justifying changing the spring based on the lifters doesnt make any sense.The lifters do bleed off a higher than normal volume of oil though, so if any argument could be made based on the presence of the edm lifters it would be for a higher volume pump.

 

[ORratrod]

I think he was referring to the general conclusion about running stock oil pumps that was posted on many different discussions that have been done previously...not necessarily because of the EDM lifters.