Isky 1023
 

I am building my Flathead with parts i have saved since the late 60’s. Had fun collecting them as a kid with my Dad. Time has come to put it all together. Would anyone happen to have any cam specs at all for the Isky 1023 for the 49/53 ? I have already tried calling Isky but could not get any info. Thanks Ron in Ft.Myers, Fla.

Re: Isky 1023 MUSHROOM TRACK.
 

In-23-68 .375 lift ex-62-18 .345 lift. In .014 ex .014 . Large bore and stroked mercurys.

Re: Isky 1023
 

Special mushroom lifters required for that cam along with special back spot facer tool to machine block.

Re: Isky 1023
 

what is the center line?

Re: Isky 1023
 

In 271 duration, 112.5 ICL

Ex 260 duration, 112 ECL

Or 112.25 LSA

Re: Isky 1023
 

Hopefully you read Pete's post very carefully - your cam is for usage with specially made "mushroom lifters" - it is not designed for any lifter that you can buy today.

So, if you have the lifters and the back-cutting tool to prep the block, then you have what you need - if you don't, then you shouldn't attempt to use this cam.

Re: Isky 1023
 

I had a friend that used one at Danbury speedway back in the 60's. Wasn't worth the effort.

Re: Isky 1023
 

A small group of us was sitting around talking to Isky back in the 50's and someone asked how the 1023 and 1024 were working out.
His exact comment was, "now why did I ever design those?".

Re: Isky 1023
 

I think the reason was for a faster lift rate??????

Re: Isky 1023
 

With all of that good advice, I think that it should be used as a wall hanger.

Re: Isky 1023
 

Thanks Pete . . . loved the story about Ed!

Re: Isky 1023
 

That is true, Ron, but Ed was refering to the marketing success of the cam which was next to zero.
The theory of the larger diameter lifter was ok but remember, he had the 404A at the time which was one of his biggest sellers.

Re: Isky 1023
 

I have installed the cam in the block with stock diameter tappets so i could examine the contact area on both sides of the ramp. Also with the .100 smaller diameter there will be approx 20 degrees lost on both sides of the ramp which may end up working just fine. This will be an interesting experiment for sure. Different combinations along with trial and error are part the fun. Thank you to all that responded.

Re: Isky 1023
 

There ARE some folks that responded to you in this thread that DO KNOW SOME STUFF! You SHOULD take their advice seriously.

Report back here after you fire-up your engine and tell us about the trial & error "fun" that you had. DD
.

Re: Isky 1023
 

Changing the cam and adjusting clearances is not much fun with a flathead, very different than an OHV motor.

"Report back here after you fire-up your engine and tell us about the trial & error "fun" that you had. DD" :-)

Glenn

Re: Isky 1023
 

I don't think it a good idea. However, we might learn sumpin.
Gramps

Re: Isky 1023
 

My question is, if that cam is designed for a radius lifter, won't the edge of the stock lifter cut into the cam flanks?

Re: Isky 1023
 

Designed for mushroom lifter. Not radius lifter. Big difference.

Re: Isky 1023
 

Yes, a big difference. BUT, if the lobe remains on the lifter face, without edging, it would not matter if the lifter was a mushroom or not. And, it seems unnecessary for such a lobe profile design to call for the larger diameter lifter face?

Re: Isky 1023
 

If it is a mushroom lifter and larger than 1", it can have higher cam lift rate than the standard 1" lifter. The max lift rate for 1" lifter with a .008 margin = .0085866 per degree. What is the diameter of the mushroom lifters?

Here too, the lifter edge can run into the cam lobe, if that lift rate is exceeded. So, if possible, the lift rate needs to be checked.