4 Cam engine tool pictures

Discussion of 4-Cam Type 547 engines (and all the Fuhrmann racing variants) and cars that powered them.
Message
Author
User avatar
Jacques Lefriant
356 Fan
Posts: 4602
Joined: Mon Dec 06, 2010 1:50 pm
Location: Washoe county NV

Re: 4 Cam engine tool pictures

#31 Post by Jacques Lefriant »

Hi Martin
i showed the fixture at the start and the finish of the arc. you have to actuate the handle go from start to finish. I repurposed a dresser for grinding wheels that normally holds a diamond to put an arc on a wheel and that would be a production method of doing a bunch of them in a line. Web Cams when they do 911 rockers uses that method. The Petr Pohl book shows a similar fixture but mine i believe to be more robust. The other fixture is used to reduce the stem diameter to accomidate the lash cap which has a 8.8mm ID instead of 9mm if you use 11/32" valves you have loose lash caps. That tool is originally used to grind the od of pins without having to use a centerless grinder i had to extend the handle to clear the head of the valve. if your valve grinder could hold the valve the oposite way you could do the same thing.
j
 

User avatar
Martin Benade
356 Fan
Posts: 12184
Joined: Wed Nov 23, 2011 10:52 am
Location: Cleveland, Ohio

Re: 4 Cam engine tool pictures

#32 Post by Martin Benade »

I guess I am slow. It looks like the tool gives a radius of maybe 20 mm. Is that correct? The follower appears to have a much larger radius than that. Or are my estimates way off?
Cleveland Ohio
62 Cabriolet
56 VW
02 IS 300
04 Sienna

User avatar
Jacques Lefriant
356 Fan
Posts: 4602
Joined: Mon Dec 06, 2010 1:50 pm
Location: Washoe county NV

Re: 4 Cam engine tool pictures

#33 Post by Jacques Lefriant »

Hi Martin/Harlan
if Harlan looks at the print he would find it is 40mm.
j
 

User avatar
Harlan Halsey
356 Fan
Posts: 2339
Joined: Fri Mar 02, 2012 2:05 pm
Location: No Cal SF Peninsula

Re: 4 Cam engine tool pictures

#34 Post by Harlan Halsey »

Jacques Lefriant wrote: Tue Mar 30, 2021 11:09 am
if Harlan looks at the print he would find it is 40mm.
j
Jacques, I stand corrected. I checked the drawing in the Carrera book and you are right, 40mm!
I was under the impression that the radius was much larger. The number is not on the drawing in the Carrera Guide, but it is on the drawing in the big Carrera book, with the admonition that the cam surface be parallel to the lash cap surface. Your jig on the surface grinder should make that job a breeze.

Is there a current method of re-surfacing the levers? Hard chrome maybe? (I think this is a textbook case for ZDDP.)

What is the current situation with lash caps? It used to be that the 9mm ones were rare and I used to trade them with Bill Doyle to get what I needed. Then I made a couple out of Stress Proof and ran them in one race, but I haven't checked to see how they did, except that the engine still runs fine.

User avatar
Jacques Lefriant
356 Fan
Posts: 4602
Joined: Mon Dec 06, 2010 1:50 pm
Location: Washoe county NV

Re: 4 Cam engine tool pictures

#35 Post by Jacques Lefriant »

Hi Harlan
I really miss Billy he would answer my naïve questions and when i thanked him he would reply "my pleasure" i am hoping that with the current leadership that overtures can be made to the SoCal club to reprint his articles.
j
 

User avatar
Jacques Lefriant
356 Fan
Posts: 4602
Joined: Mon Dec 06, 2010 1:50 pm
Location: Washoe county NV

Re: 4 Cam engine tool pictures

#36 Post by Jacques Lefriant »

tool of the day
thumbnail_IMG_6382.jpg
thumbnail_IMG_6382.jpg (267.62 KiB) Viewed 2465 times
 

User avatar
Trevor Gates
356 Fan
Posts: 1089
Joined: Thu Dec 10, 2009 6:52 pm
Location: San Clemente, CA

Re: 4 Cam engine tool pictures

#37 Post by Trevor Gates »

Jacques Lefriant wrote: Wed Mar 31, 2021 10:33 am Hi Harlan
I really miss Billy he would answer my naïve questions and when i thanked him he would reply "my pleasure" i am hoping that with the current leadership that overtures can be made to the SoCal club to reprint his articles.
j
If you’re talking Jacques, I’m listening! I’m currently on the board for the SoCal 356 Club. Please tell me exactly what you’d like and I’ll bring it up at the next board meeting and try to make it happen. Rex is the editor and is one of the good guys.

PS - It was nice that you had those oldham couplers for Jack, he’s building a pushrod engine right now for Marco and Marco is writing about it in the SoCal 356 Club magazine.
https://www.instagram.com/trevorcgates/

User avatar
Jacques Lefriant
356 Fan
Posts: 4602
Joined: Mon Dec 06, 2010 1:50 pm
Location: Washoe county NV

Re: 4 Cam engine tool pictures

#38 Post by Jacques Lefriant »

Hi TrevorI think the key is to convince Hal that we would be very gratefull for his help. And if you could get Jack to post i could just do 4-Cam nonsense.
j
 

User avatar
Ibrahim Kuzu
356 Fan
Posts: 830
Joined: Wed Mar 26, 2008 8:15 am

Re: 4 Cam engine tool pictures

#39 Post by Ibrahim Kuzu »

Jacques,
Definitely, Haas 750 5 axis the tool....
Great idea for Bill Doyle's 4 cam articles .

Trevor,
Appreciate the time and afford you can put for the great info Billy did many years. Would be super if the articles can be available in Carrera 4 cam corner..
And
Respected the master Jacques and others help, we will be well educated .
IK

User avatar
Trevor Gates
356 Fan
Posts: 1089
Joined: Thu Dec 10, 2009 6:52 pm
Location: San Clemente, CA

Re: 4 Cam engine tool pictures

#40 Post by Trevor Gates »

Jacques Lefriant wrote: Wed Mar 31, 2021 1:28 pm Hi TrevorI think the key is to convince Hal that we would be very gratefull for his help. And if you could get Jack to post i could just do 4-Cam nonsense.
j
If the 356 Registry board has interest they can send me an email or call me and I can put it to our board to determine who has the photo rights; I believe Billy wrote the articles however I don’t know who took the pics - quite possibly Hal, but maybe not.

I keep working on Jack to post on the Registry again... Speaking of 4Cam “nonsense” :-)
Attachments
37E30ECB-5717-46D9-8A6C-8C321CD6CEC2.jpeg
37E30ECB-5717-46D9-8A6C-8C321CD6CEC2.jpeg (3.47 MiB) Viewed 2426 times
https://www.instagram.com/trevorcgates/

User avatar
Jacques Lefriant
356 Fan
Posts: 4602
Joined: Mon Dec 06, 2010 1:50 pm
Location: Washoe county NV

Re: 4 Cam engine tool pictures

#41 Post by Jacques Lefriant »

tool of the day
DSC_8820.JPG
DSC_8820.JPG (2.69 MiB) Viewed 2414 times
Hi Harlan
this is my repurposed fire controll resolver calibrator. it can index at 10* camshaft and with the adjustment 2* min resolution. the extra finger follower is DLC coated rather than hard chrome.
j
 

User avatar
Jacques Lefriant
356 Fan
Posts: 4602
Joined: Mon Dec 06, 2010 1:50 pm
Location: Washoe county NV

Re: 4 Cam engine tool pictures

#42 Post by Jacques Lefriant »

Hi
Hunger adjustable reamer set.
they even come in bigger sizes to line bore.
DSC_0011.JPG
DSC_0011.JPG (4 MiB) Viewed 2390 times
DSC_8711.JPG
DSC_8711.JPG (2.47 MiB) Viewed 2389 times
 

User avatar
Harlan Halsey
356 Fan
Posts: 2339
Joined: Fri Mar 02, 2012 2:05 pm
Location: No Cal SF Peninsula

Re: 4 Cam engine tool pictures

#43 Post by Harlan Halsey »

Here's some Carrera tooling I made a while ago. Can you guess what it's for?
IMG_0721 Carrera Fixture.jpg
IMG_0721 Carrera Fixture.jpg (1.66 MiB) Viewed 2328 times
Bottom view.
IMG_0725  Bottom Carrera Fixture.jpg
IMG_0725 Bottom Carrera Fixture.jpg (1.69 MiB) Viewed 2328 times
This was before the DRO milling machine. Haven't got to the CC multi axis yet.

User avatar
Greg Bryan
356 Fan
Posts: 3692
Joined: Sat Oct 04, 2008 1:05 pm
Location: San Pedro, CA 90732; Fallen Leaf, CA 96150
Contact:

Re: 4 Cam engine tool pictures

#44 Post by Greg Bryan »

Harlan - we need a hint! :D
Greg Bryan

User avatar
Martin Benade
356 Fan
Posts: 12184
Joined: Wed Nov 23, 2011 10:52 am
Location: Cleveland, Ohio

Re: 4 Cam engine tool pictures

#45 Post by Martin Benade »

For holding a head while milling the cam cover surface?
Cleveland Ohio
62 Cabriolet
56 VW
02 IS 300
04 Sienna

Post Reply