Tech offering: Evo cam in a pan 101

[F.St.M.]

So I wanted to run evolution heads on my pan/generator bottom end.

Easy enough, get the cases machined for evo stud spacing and bolt the top end on!

But what about a cam? Evolution heads/valvetrains like hydraulic tappets and evolution cam grinds/profiles. However evo cams will not fit in a pan gearcase. They're longer, and have a much larger diameter outer journal. Not enough meat on the generator cam cover bushing boss to bore out either. Looks like we need a specialty cam!

Call 3-4 cam manufacturers & see who's willing to grind an evo profile onto a pan shaft blank. Only two companies will even talk to me. One says $500 - $600, the other says 100 piece minimum order. Since I dont need 100 special cams, nor do I fell like grabbing my ankles & being analy violated, I decide to do this.

An evo "cone" type cam looks like this:



I got an old lathe, so I get to cutting:

[F.St.M.]

It's rough, so I press off the gear and make some fine cut passes:


Much nicer now:


Mark the approx desired overall length:

[F.St.M.]

With overall length marked:


I switch over to the bridgeport mill:


That big 6 flute endmill slices thru the cam like a hot butter through knife:


Back to the lathe, I chamfer the end:

[F.St.M.]

Machining is now done:


Compare overall length with an actual pan cam:


Looks like a keeper:



Well that's it, evo cam in a pan. My little tech week contribution.

P.S. It does run.

[Abe_Lugo]

Dude,
That is cool and all with the changes, but do you still call your engine a pan?
I really do admire the effort to change the engine internally. Like those knucklehead sportster engines.

But it looks like your running a 5 speed? are you a douche?

[F.St.M.]

Originally Posted by Abe_Lugo

Dude,
That is cool and all with the changes, but do you still call your engine a pan?
I really do admire the effort to change the engine internally. Like those knucklehead sportster engines.

But it looks like your running a 5 speed? are you a douche?

No, I call it an evo.
I am running a 5 speed.
I prefer to refer to myself as a vaginal cleansing.

[Abe_Lugo]

you had me fooled for about 30 secs. show the rest of the bike.

[Jimmy the saint]

I will trade you more Evo heads for your discarded Panheads

[chopperking]

congrats, man. best tech article so far in my book. thanks for the great pics.
see ya

[SDJose]

Panolution! Modifying newer parts for an old motor. I think that's fucking alright. Thanks for the pics.

[F.St.M.]

Originally Posted by Abe_Lugo

you had me fooled for about 30 secs. show the rest of the bike.

Sorry Mcgoo, but I'm stealing another of your pics of my bike:

[Abe_Lugo]

Originally Posted by SDJose

Panolution! Modifying newer parts for an old motor. I think that's fucking alright. Thanks for the pics.

but that's one of them evo based blocks with a panhead look, not the other way around.
Why in the fuck would I messup a panhead with some an evo top end?
I know guys for this wil generator blocks and call them shovel/pans.

I like evo, I have two. But if I had a ppanhead, I'd leave it a panhead.
I know this has to be some sort of joke anyhow, I not mad just a bit confused.

BTW it's a cool custom bike, but almost nothing original panhead about it.

F.St.M. , isn't it?

[Trent]

Great tech.

Senseless.

But interesting.


I am thankful it wasnt a real Pan to start with.

[F.St.M.]

Originally Posted by Abe_Lugo

but that's one of them evo based blocks with a panhead look, not the other way around.
Why in the fuck would I messup a panhead with some an evo top end?
I know guys for this wil generator blocks and call them shovel/pans.

I like evo, I have two. But if I had a ppanhead, I'd leave it a panhead.
I know this has to be some sort of joke anyhow, I not mad just a bit confused.

BTW it's a cool custom bike, but almost nothing original panhead about it.

F.St.M. , isn't it?

You're right Abe, This was not a complete pan engine that was bastardized.

It was a collection of used parts from a 1962 FL that were cobbled together in a set of S&S generator cases with the specific goal of mating an evo top end to it.

I never claimed it was anything else.

Only the rods, bearing cages, pinion shaft, pinion gear, breather, timer drive, and generator drive remain from the 62.

Even the 62 flywheels were traded for a pair of Truet & Osborn stroker wheels.

In the original tech article I used the term "pan" when I should have used the term "pan or pre-70 shovel type" It was just easier to type pan, I figured everyone would know what was implied. Sorry if I pissed anybody off with my sacreligious terminology.

[TurboRoadster]

Originally Posted by F.St.M.

No, I call it an evo.
I am running a 5 speed.
I prefer to refer to myself as a vaginal cleansing.

[Trent]

One other thing... Why the right hand shift?

[F.St.M.]

Originally Posted by Trent

Great tech.

Senseless.

But interesting.


I am thankful it wasnt a real Pan to start with.

I'ts not senseless to me. I aquired the 62 parts in trade for other shit I had that was of no use to me. Same goes for the blockheads.

In order for me to get a running engine together, I needed only cases and jugs w/pistons.

Besides my time/labor I have only $1600 tied up in that engine. I'ts a running 88 incher.

[F.St.M.]

Originally Posted by Trent

One other thing... Why the right hand shift?

Pure laziness.

After making the floorboards, floorboard mounting brakets, mastercyl perch, brake pedal, and plunger completely from stratch, I was tired.

I opted not to make a foot shift, but rather to use a lincoln C-6 automatic tranny bellcrank and a hurst stick that I had laying aroung in my garage.

Theres a hand clutch on the left bar.

[Abe_Lugo]

Originally Posted by F.St.M.

Pure laziness.

After making the floorboards, floorboard mounting brakets, mastercyl perch, brake pedal, and plunger completely from stratch, I was tired.

I opted not to make a foot shift, but rather to use a lincoln C-6 automatic tranny bellcrank and a hurst stick that I had laying aroung in my garage.

Theres a hand clutch on the left bar.

Wow, thanks to the isight on the engine build now it make sense!
Abe

[Manny Fresh]

my 2 cents. I think this rocks reminds me of the stories you hear about guys during WWll building rides for them selves using what was available, looks great ride the crap out of it, and know that you made it.