Questions on lifter bore correction

[carl hinkson]

Originally Posted by Mike Taylor 3601

How close are Dart's blocks lifter bore locations when you check or machine them on CNC's. I will replace my 3 boring machines with CNC eventually, not sure what brand yet.
Mike Taylor 3601

Most blocks I machine lifter bores in I spot face the lifter bores and so far the Dart blocks seem to be spot on, That being said last weekend I machined a World Merlin 3 block going from .842 to .904 and the exhaust lifter bores on the drivers side all needed bushings. Even when I spot faced the to off the lifter bores they were of by quite a bit.

I have 2 HAAS CNC machines I work with both are great machines and if they are good enough for Hendricks Motorsports they should be fine for me.

If I was going to buy a new CNC for machining blocks I would go with the Centroid machine. http://centroidperformanceracing.com..._cnc-video.php

What ever you get for a CNC it a must to get it with a Probe system !!!!!

[Mike Taylor 3601]

Thank's Carl
The Dart blocks I have checked with BHJ matched lifter bores great,had some merlins not so great.
Only CNC's I have any info on is I had friend who had a Rottler F-65 could have bought 3 or 4 years ago for 55K wasn't right time for me though and subject came up while talking to Tim at T&S machines, one plus for his machine is all parts are generally available and they have great customer service,I really like my upgrade I got from them for my CWT 3000 balancer.
This is a purchase that will be few years down the road at least if even then.

Mike Taylor 3601