CLASS RACER FORUM - View Single Post - Dart Little M sportsman top end oiling issue SBC

carl hinkson · 03-14-2016, 08:12 PM

I asked you a few questions earlier but no response and my crystal ball not working !!!!

If thats a Dart Little-M with billet caps and if this is a wet sump application the rear galley holes need to be plugged and the front galley holes need no plug or restrictors for this block to be a true priority oiling. The Little-M with nodular caps galleys are machined different.

Lifter bore clearance is real critical when it comes to oiling push rods and rockers.

Number one there is noooooo standard when it comes to roller lifters on sizing. Comp, Crower and ISKY run up to .0015 smaller then OEM lifters and a Morel lifters are made to OEM spec rather its an .842,.875,.904 roller lifter.

Its amazing how many guys are clueless when it comes to lifter bore clearance LOL. And there are alot of shops that can't measure a lifter bore or even hone one to size !!!

When it comes to building a performance engine EVERYTHING has to be checked to get the best results.

If the lifter bore clearance is to tight oil will be restricted and will burn up push rods and there is a good chance of sticking a lifter in the bore. If its to loose the top end is flooded with oil.

Lifter bore clearance should be .0014 to .0019 if your in that parameter you should be fine.

I machine alot of Dart blocks and I don't let one out of the shop with out fitting lifters. If you have the proper clearance you should be getting the correct amount of oil to the rockers. I use a lot of Morel lifters and most of the time the lifter bores do need honing to get to the correct size.

My circle track engines I do groove the lifters on the drivers side and it takes a very small groove as its easy to over oil with to big of groove.

Here is a video on lifter bore clearance and bleed off between brands of lifters.

One other area I have seen a problem is using cam bearings with 3 holes no matter how you clock the cam bearing there is one cam bearing per journal with one hole in the 10:00 to 2:00 area which causes a severe bleed off. Prim your engine with the intake off and as see how much bleed of there is. Now have 220 degree oil now the problem is even worse.

03-14-2016, 08:12 PM	#4
carl hinkson Member Join Date: Feb 2007 Location: NORTHEAST Posts: 287 Likes: 1 Liked 18 Times in 10 Posts	Re: Dart Little M sportsman top end oiling issue SBC I asked you a few questions earlier but no response and my crystal ball not working !!!! If thats a Dart Little-M with billet caps and if this is a wet sump application the rear galley holes need to be plugged and the front galley holes need no plug or restrictors for this block to be a true priority oiling. The Little-M with nodular caps galleys are machined different. Lifter bore clearance is real critical when it comes to oiling push rods and rockers. Number one there is noooooo standard when it comes to roller lifters on sizing. Comp, Crower and ISKY run up to .0015 smaller then OEM lifters and a Morel lifters are made to OEM spec rather its an .842,.875,.904 roller lifter. Its amazing how many guys are clueless when it comes to lifter bore clearance LOL. And there are alot of shops that can't measure a lifter bore or even hone one to size !!! When it comes to building a performance engine EVERYTHING has to be checked to get the best results. If the lifter bore clearance is to tight oil will be restricted and will burn up push rods and there is a good chance of sticking a lifter in the bore. If its to loose the top end is flooded with oil. Lifter bore clearance should be .0014 to .0019 if your in that parameter you should be fine. I machine alot of Dart blocks and I don't let one out of the shop with out fitting lifters. If you have the proper clearance you should be getting the correct amount of oil to the rockers. I use a lot of Morel lifters and most of the time the lifter bores do need honing to get to the correct size. My circle track engines I do groove the lifters on the drivers side and it takes a very small groove as its easy to over oil with to big of groove. Here is a video on lifter bore clearance and bleed off between brands of lifters. One other area I have seen a problem is using cam bearings with 3 holes no matter how you clock the cam bearing there is one cam bearing per journal with one hole in the 10:00 to 2:00 area which causes a severe bleed off. Prim your engine with the intake off and as see how much bleed of there is. Now have 220 degree oil now the problem is even worse.