Isky or Potvin
 

Did the late Jazzy Nelson use a Isky or Potvin cam in his FH powered car. I do know it was pretty fast for it time. The Bean bandits used to respect it.

Re: Isky or Potvin
 

505A Isky.

Re: Isky or Potvin
 

Does the 505 represent the lift as the 404 did?

Re: Isky or Potvin
 

Approximately. It has .515 lift.

Re: Isky or Potvin
 

That's amazing. I never heard of that cam before. I wonder if Tom Beaty(sp) was aware of it or maybe it was not a good cam for the salt flats.

Re: Isky or Potvin
 

Isky only made 3. Only one is left.The 3rd one dissappeared.
I talked to Tom many times at Bonneville but we never discussed cams.
I am sure he was aware of it. It would work very well at Bonneville.

Re: Isky or Potvin
 

Have you ever tried to grind a 505A or would it be impossible to do without a core to start with?

Re: Isky or Potvin
 

I have done one.

Re: Isky or Potvin
 

Pete, what kind of springs do you use for that? Is this a roller cam?

Re: Isky or Potvin
 

Springs are 4 coil special. Similar to 410 sprint car engine.
This is a radius lifter type. Uses same lifters as 404A.

Re: Isky or Potvin
 

Rana 404 once, wazent happy with it!! 400 jr ran better, but that was probably my fault.

Re: Isky or Potvin
 

505 lift. I take it you need a billet cam with no cam bearings in the block? Or you modify the block for that much lift?

Re: Isky or Potvin
 

Yes on billet core.
Yes on running journals in bare block.
No mods to block for lift.

Re: Isky or Potvin
 

And here are some pictures of the 505A that Pete is talking about - with some side-by-side shots against the 404A.

I have yet to run the cam, need to build a very "special" engine for it.

Attachment 439775

Attachment 439776

Attachment 439777

And Jazzy Nelson's Coupe . . . probably the fastest drag coupe that ever ran a flathead. Jazzy ran the 404A quite a bit, but "wanted something bigger - and a secret grind" - that is when Ed made the 505 for him.

Attachment 439778