Cam design basics ?

General engine tech -- Drag Racing to Circle Track

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hoffman900
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Re: Cam design basics ?

Post by hoffman900 »

CamKing wrote: Sat Jan 15, 2022 1:57 pm
hoffman900 wrote: Sat Jan 15, 2022 12:31 pm I forgot you had mentioned the rollers are really just LARGE diameter flat tappets design wise.
Other way around.
From the design standpoint
A flat tappet profile is just a roller profile with a 56" radius roller.
Ah, yes.
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Re: Cam design basics ?

Post by SchmidtMotorWorks »

hoffman900 wrote: Fri Jan 14, 2022 11:06 pm
SchmidtMotorWorks wrote: Fri Jan 14, 2022 9:51 pm
CamKing wrote: Fri Jan 14, 2022 2:39 pm You're not going to believe it, but that 1994 engine that Honda developed, used a cast iron block.
Yep, I worked on that engine.
It was a real drain to moral for the project.
One of my tasks there was fitting plated aluminum sleeves to those blocks, (nicest turning equipment I ever used, you could dial off a cut and the Voest Lathe would cut within 0.00005 reliably.)

They were desperate to solve a crankshaft bearing problem, they thought maybe if the block was more rigid, the problem would be mitigated (it wasn't).

It was a counterweight, materials, surface hardening and surface roughness problem.

They had aluminum blocks too.
Jon was that all HPD design or were you guys being fed stuff from Japan? Obviously it was fixed for ‘95.
It was all from Japan.
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