Quote:
Originally Posted by Reed Granrt
Carl
Long time since I spoke with you. If you remember we talked eons years ago about reworking small block oil pumps. I to have CNC capability with two machines. I purchase a few Dart blocks and Bowtie blocks as well as PBM. I have 1 SHP and 2 Little M and a Big M and a Bowtie here now. But I do not purchase enough to buy direct at a great cost, so I purchase from a good vendor that handily takes care of me( they sort thru a larger inventory than I could ever keep to help me). Have you had the opportunity to check the SHP after several runs (circle tracks) and saw any problems with their integrity as compared with the Little M.. Have you noticed the inability to keep seal after severe use and walking around of the mains.
reed
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So far we have seen no issues as we have 2 guys one with a twin turbo build that is making appox. 850 horse and another procharger build that is appox. 825 horse and both are 3 years old and still running great.
On most of the blocks we machine we do add main studs and when using head studs we use a .950 stud bottom tap the head bolt holes and drop a ball bearing in the holes and screw the studs in as it keeps the cylinder much rounder on the bigger bore blocks, Rather bottoming a .750 stud out on the top of the deck.
Most leak downs are right at 2%
Using a good hone and the correct stones are key to having good ring seal and long life.
Hope this helps