It's a "FlexHone"
For deglazing I think they do a much better job as they can conform to the bore where the Stones in the 3 Prong will miss any lows in the walls.
I try to stay away from those as it's easy to slip and mark up the bore.
Make sure you use an even up and down motion have a helper spray some CRC in to clear the stines during the process and when you withdraw the Hone make sure it's still spinning don't stop and drag it out.
I prefer these>>
Joel: The Siamesed bores add to the torsional ridgidity of the block so I don't see the bore spacing being that much of an issue.
An extra pair of headbolts around each bore would have been nice though!
Hot: Thanks!
Steve: I think/feel the only difference will be bearing life.
Wayne: LOL nah not really I'm keeping it within safe limits!
Ash: 7M crank is late 89+ Motors, the Squirters were I think in all GTE's but I have read about some early early Turbo motors that didn't get em (very...
Chicken and Egg scenario... which came first
In our motors we have cause and effect going on including many random factors that will cause a BHG.
Low Tq settings
Badly maintained
Any leak in the cooling system
No coolant used or incorrect concentration
Badly prepped surfaces
Bad...
Update!
My 7M full counterweight Crank has been to 7700 probably 100 times now with no ill effects!
I plan on pulling the motor for inspection once my final tune is done so will be able to gauge if there is anything further that needs to be done for longevity.
I used ACL's in my dyno mule that burnt a piston when an Injector leaned out during a power run and wouldn't have hesitated to reuse the same bearings as they were perfect when I pulled the motor down.
If you have the correct clearances and enough Oil in the motor at all times the bearings...
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