New 400E and 425 Pistons
#1
New 400E and 425 Pistons
Just spoke with my contact at Mahle and we're moving forward on the new Olds pistons for 400E and 425 engines.
Compression distance will be 1.625 with a 10cc valve trough. Bore sizes are 4.065, 4.100, 4.155 with their new 1.00, 1.00, 2.00mm ring pack and made from their proprietary coated 4032 material. Wrist pin will be a full floating .984 to accommodate honing rods to size. Sale price should be the same as a typical SBC Mahle flat top.
At 10cc and with that cd the measured compression ratios will be around 9.3-9.7:1 with the various combinations and typical stock deck heights, gaskets, and iron head chamber sizes.
Looking for a launch in the next few months. Comments?
Compression distance will be 1.625 with a 10cc valve trough. Bore sizes are 4.065, 4.100, 4.155 with their new 1.00, 1.00, 2.00mm ring pack and made from their proprietary coated 4032 material. Wrist pin will be a full floating .984 to accommodate honing rods to size. Sale price should be the same as a typical SBC Mahle flat top.
At 10cc and with that cd the measured compression ratios will be around 9.3-9.7:1 with the various combinations and typical stock deck heights, gaskets, and iron head chamber sizes.
Looking for a launch in the next few months. Comments?
Last edited by cutlassefi; October 2nd, 2017 at 04:46 PM.
#4
And as Fun71 stated, anyone with 400/425 cranks can now do a more modern build. This will be a quality piece, head and shoulders above the Egge/Kantor stuff for not that much more. Their pistons aren't really that cheap if you consider what you're getting, 50 year old technology.
The plan is to have them make 5 sets of each bore size and go from there. We may find out one is more popular than another etc. That's why this post and the small initial batch size.
Thanks!!
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