The 4.375 and 4.40 bore center Ford and Chev Small blocks have a 0.75 to 0.866 Cylinder 1 to Cylinder 2 spacing like nearly all common crank pin 90 V6/V8s or 60 degree V12's.
The rod offsets are offset about half that left to right cylinder spacing.
The old Vortec and earlier SBC derived 90 degree V6's Chev's have a rod different offset to a 305 350/400, about 180 thou on some.
There is a large amount of redundancy in the wrist pin part of the beam of even a 5.09 302 SBF or 5.115 289 SBF rod, and an option of back sizing to 0.911 or 0.927 in the wrist pin by oversizing the wrist pin, and then put a brass insert in it.
The Mitsubishi or SBC bushing allows a 0.866 or 0.927" wrist pin to fit in a re honed rod.
I finally had a chance to pull out my rods and look at them. While I did not use a caliper, or anything more precise than my eyes, I just don't see any offset. Either longitudinally in the engine-wise, or perpendicular to the crank. :hmmm:
Ref: Piston-guiding the rods, my engine builder/machinist (Eric @ Boyd's Racing Engines, Norman, OK) just doesn't think it necessary, preferring to let them float. Most of what I found online backed that opinion up.
I will measure the rods for offset in both axis' (axees?) this weekend, if my wife doesn't have other plans for me... :roll: :nono:
So anyway - more to come. I think they are going to be fine. I guess we'll see!
sounds like my town.
Wanna rebuild the schools (2), library, fire station, DPW (all at once).
"Prop. 2 1/2" (40 y/o now?) over ride time? I'd say (if they wanna do it all).
Home owners/tax payers may not go 4 it.
U got any college aged kids as well? Mights well pile it all on~
No pictures in #46... Don't know what is going on there. :hmmm:
I don't want to derail the thread any further, so I'm just going to drop this here, and start a new build thread soon...
I just got off the phone with Kevin (Jerry's son) at Schneider's. I ordered a custom solid cam and EDM high-pressure oil-through lifters for my turbo/EFI build. This is a max-effort road racing engine to use in a light car (Model A roadster pickup, crossed with a Locost/Lotus 7). It'll be mostly a track ride, but with a little bit of street driving... I've been working with him for a couple of weeks now, and finally got through all the details we both had questions about. He was very helpful and a pleasure to do business with. Highly recommended.
Oh, and for anyone who is considering it - the price premium for a custom cam, designed specifically for your application - is only $10 extra. I was flabbergasted.
Anyway - you can tell I've been reading a lot of Xctasy's posts about "more" ...