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Old 01-09-2016, 08:26 AM   #21
Frank Miller
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Default Re: Isky 404A cam - Harley Davidson grind?

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Originally Posted by Tim Ayers View Post
Harleys get some of there sound from that but most from their unique way the cylinders fire one right after other. Almost like a radial engine would vs. A true twin.

They don't fire one after another but they are not 360 degrees apart. As said earlier the single pin will not allow this as when one piston is at the top on compression the other is almost at the top on exhaust.
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Old 01-09-2016, 08:32 AM   #22
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Default Re: Isky 404A cam - Harley Davidson grind?

I would roll that whole engine stand complete with the flathead, blower, and carbs, into my living room, just to look at it every day.
OOPS, never mind, I forgot I am married. You did good Jason.
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Old 01-09-2016, 01:10 PM   #23
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Default Re: Isky 404A cam - Harley Davidson grind?

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They don't fire one after another but they are not 360 degrees apart. As said earlier the single pin will not allow this as when one piston is at the top on compression the other is almost at the top on exhaust.
Frank

Thanks for the clarification. You are right. It's something like 315 degrees apart causing that pop-pop sound. Must have had a brain hiccup.

Tim
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Old 01-09-2016, 10:30 PM   #24
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Default Re: Isky 404A cam - Harley Davidson grind?

Harley tried to get a patent on that not too long ago.
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Old 01-13-2016, 01:45 AM   #25
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Default Re: Isky 404A cam - Harley Davidson grind?

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Harley tried to get a patent on that not too long ago.
I think more like 12 yrs ago!!!!
Time flies when your old !!!
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Old 01-13-2016, 05:37 PM   #26
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Default Re: Isky 404A cam - Harley Davidson grind?

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That is some collection of stuff right there!!
Is that four boxes of tipped radius lifters? I see the slots in the front three packs?
Question for Pete here,
those lifters the "tipped" one's, you've stated in earlier posts that welding on the lifters is a big no no. And that the needed length should be added to the valve stem. I've seen in old books and magazines pics of these lifters, with that added on pad on the top. Were these pads welded on? Or some other process? Did these lifters have issues?
Look forward to you thoughts on this.
Thanks,
Martin.
Sorry for hijack, but I feel relevant.
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Old 01-13-2016, 05:59 PM   #27
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Default Re: Isky 404A cam - Harley Davidson grind?

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That is some collection of stuff right there!!
Is that four boxes of tipped radius lifters? I see the slots in the front three packs?
Question for Pete here,
those lifters the "tipped" one's, you've stated in earlier posts that welding on the lifters is a big no no. And that the needed length should be added to the valve stem. I've seen in old books and magazines pics of these lifters, with that added on pad on the top. Were these pads welded on? Or some other process? Did these lifters have issues?
Look forward to you thoughts on this.
Thanks,
Martin.
Sorry for hijack, but I feel relevant.
The buttons were silver soldered on. They were put on as a convience for back yard engine builders so they wouldn't have to do either that or weld the valve stems at home.
Overall they worked good. I did see a few that showed sagging on the top due to loss of heat treat during soldering process..
I wouldn't be afraid to run lifters with buttons. We have much better springs now.
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Old 01-14-2016, 02:30 AM   #28
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Default Re: Isky 404A cam - Harley Davidson grind?

Ah! Silver soulder, makes sence.
What were the pads made of?
Thanks for reply,
Martin.
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Old 01-14-2016, 10:23 PM   #29
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Default Re: Isky 404A cam - Harley Davidson grind?

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Ah! Silver soulder, makes sence.
What were the pads made of?
Thanks for reply,
Martin.
Not sure but a guess would 4130.
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Old 01-15-2016, 08:45 AM   #30
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Default Re: Isky 404A cam - Harley Davidson grind?

Thanks Pete,
Martin.
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Old 01-03-2017, 02:23 PM   #31
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Default Re: Isky 404A cam - Harley Davidson grind?

Ed Iskendarians 404A Constant Acceleration Camshaft is actually a copy of a #2 Offy Grind which is actually a copy of a Miller Grind.
If you get a chance ask Ed himself and he will tell you the story like he told me.
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Old 01-03-2017, 02:25 PM   #32
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Default Re: Isky 404A cam - Harley Davidson grind?

I run the 404A in my Dragster. I made the Radius Lifters from an old set of Hollow Johnson Lifters.
I actually show them and the Entire engine build up in the Video "Fullrace Flathead".
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1965 Pontiac GTO, 455 Super Duty
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Old 01-03-2017, 04:30 PM   #33
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Default Re: Isky 404A cam - Harley Davidson grind?

Very good cam , need to watch spring pressure .The duel springs can give up #125 pressure ,hard on cam ware.
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Old 01-03-2017, 05:16 PM   #34
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Default Re: Isky 404A cam - Harley Davidson grind?

Finally! A flathead that may actually need zinc additive!!
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Old 01-03-2017, 10:51 PM   #35
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Default Re: Isky 404A cam - Harley Davidson grind?

I believe Isky's 404 grinds are an adaptation of Ed Winfield's number 4 profile for Offenhauser 4-cylinder engines. Offenhauser engines used radius lifters.
Potvin called his version "Eliminator", and uses flat lifters.

Last edited by Flatout; 01-03-2017 at 11:08 PM.
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Old 01-03-2017, 11:47 PM   #36
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Default Re: Isky 404A cam - Harley Davidson grind?

Hi all; I see a Power Master starter there. They engage front to back, the opposite of a Ford stocker. So the ring gear bevel is for the stock type stater. Does the ring gear need to be flipped or rebeveled for the Power Master type?? Newc
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Old 01-04-2017, 06:03 AM   #37
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Default Re: Isky 404A cam - Harley Davidson grind?

Hi Jason , i built a 304 ci with a 404-a cam flathead and after 20k miles its still running!
Best cam i ever used .
Better than a potvin 425 eliminator.
I can compare as i built another 304 ci
With an eliminator cam .

Do you sell your spare radius lifters ?
I could use them
If so , drop me an pm

Michael
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Old 01-13-2017, 04:48 PM   #38
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Default Re: Isky 404A cam - Harley Davidson grind?

Just a quick FYI Isky made the Radius Lifters from Original Ford Lifters.
There is enough material on Originals to do it. Be careful of lifters that may have been reground on their bottoms before making a new set of Radius Lifters.
I made mine from an old set of Johnson Adjustable's to have the ease of lash adjustment.
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-Henry Ford

"Primitive technology is not a design flaw"


1928 Ford Model A Roadster Pickup
1930 Gordon Smith Air Compressor
1941 Willy's Pickup
1960 Thunderbird-For Sale
1964 Buick Riviera 2x4 425
1965 Pontiac GTO, 455 Super Duty
2004 Dodge Ram SRT-10, V-10 Viper
1977 Charger Jet Boat,460 Ford,Jacuzzi Jet
Front Engine Nostalgia Dragster,Supercharged 296 "Fullrace Flathead" Ford
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Old 01-13-2017, 04:54 PM   #39
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Default Re: Isky 404A cam - Harley Davidson grind?

Pete sometimes does sets of radius lifters for the 404-A . . . just ping him if you need a set.
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Old 03-22-2017, 12:24 PM   #40
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Default Re: Isky 404A cam - Harley Davidson grind?

My boss has a flathead they just torn down and it has a set of lifters just like in this picture. He wants to know where a person could get a set of the pins/retainers for the lifters as well as other valve train parts.

Also on the cam it has Iskandarian Rack then 404 A. On the shaft there is a CWC but nothing else - where could I get information about the cam etc.

Thank you



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In order to get the cam, I had to buy a few other things....



inside the engine

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