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Old 10-15-2015, 04:14 PM   #26
linuxman51
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Originally Posted by dieselboy View Post
Bent rods in a b21ft? I'd like to see that.
isaac did it iirc.
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Old 10-16-2015, 01:03 PM   #27
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My b23et was built with positive deck height. The pistons appeared below deck (catch a finger nail on the edge of the block) at TDC last time I had the head off. Suspect I may have some internal issues. it can happen
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Old 10-18-2015, 07:25 AM   #28
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They bend just like the rest
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Old 10-18-2015, 04:28 PM   #29
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It seems like non existent tuning could bend almost anything.
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Old 10-18-2015, 05:35 PM   #30
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It seems like non existent tuning could bend almost anything.
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Old 10-19-2015, 04:08 AM   #31
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Hey John, why the switch to I beam from H beam? Will you still offer H beams? Going to go do some reading. How often do you place orders? I was likely going to order some in the next month or two.

Jordan
Ya know as far as i can see, the 100% machined I profile vs the 1005 machined H profile "debate' as been going on since the mid 1930s. I grew up around reciprocating (piston) aircraft engines, both Wrights and Pratt and Whitney radials..US Navy stuff---my Dad was a pilot (in in 1942, out in 1972)...Since all these radals were common I weas naturally interested in "the other side's" engines...Japanese radials and then Euro V12s like Rolls Royce Merlin, Diamler Benz DB600 series inverted V12, Hispano-Suiza's 2 valve V-12 which the Soviets paid licence fees and developed as the Klimov V12s first as 2 valve heads, later as 4 valve..
One thing was clear: none of those designers could ever settle on which way was the best way...
Even in a time when outputs doubled and then went up another 30-50%..

Interestingly they couldn't ever conclude the best way to make cranks: twisted forgings or start with a BIG round chunk--as big as your counterweights, and carve it all up

I want to make the change for increased sales to whats called "FIA Appendix K Historic class" cars and there the rules are interpreted as "if it was I profile rod in the homologation form, you can change things but it must be I profile"

I have my pistons and rods in 3 ex-works Volvo 240 group A cars, and i want to make sure more can use them without worries..
Also want to make them just a little fatter in the palm area...just insurance at crazier pressures.

And for some of those guys, i will make some the OEM c-c for B21/23 aka 145mm...(groan) (No reason to even consider that length unless there is strictly enforced rules requiring that).

Oh interestingly even the best modern engine designers, Cosworth, they can't settle on one or the other..LOTS of their rods over the years have been rather mundane looking I profile, but often enough you see H profile..
As they say in California "Like,.....................whad evar"
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Old 10-19-2015, 04:20 AM   #32
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Oh interestingly even the best modern engine designers, Cosworth, they can't settle on one or the other..LOTS of their rods over the years have been rather mundane looking I profile, but often enough you see H profile..
As they say in California "Like,.....................whad evar"
Even some of the Top Fuel teams are using I profile. It comes down to what makes the customer feel better.
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Old 10-19-2015, 04:29 AM   #33
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It seems like non existent tuning could bend almost anything.
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Old 10-24-2015, 11:40 AM   #34
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Good point, but bend almost anything? IDK, you needing crank pulleys and cams over there?

Last edited by haltechsupra; 10-24-2015 at 11:46 AM..
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