The Cal-look Lounge
Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email?
November 04, 2024, 22:34:33 pm
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
Thank you for your support!
Search:
Advanced search
351158
Posts in
28651
Topics by
6852
Members
Latest Member:
garry34
The Cal-look Lounge
Cal-look/High Performance
Pure racing
Porsche 356/912 "Pencil Stem" Lifters?
« previous
next »
Pages:
[
1
]
Author
Topic: Porsche 356/912 "Pencil Stem" Lifters? (Read 6639 times)
Zach Gomulka
Hero Member
Posts: 6991
Don't piss down my back and tell me it's raining.
Porsche 356/912 "Pencil Stem" Lifters?
«
on:
March 20, 2009, 18:26:52 pm »
Why don't more people use these? They always seemed like a great idea to me- approximately 30g lighter than a VW follower (combined that's over a half pound!), and .810" longer resulting in a shorter, lighter pushrod that deflects less. All that needs to be done is bush the lifter bores, which most performance engines have done, anyway. So what's the hold up?
Logged
Born in the '80s, stuck in the '70s.
Udo
Hero Member
Posts: 2077
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #1 on:
March 20, 2009, 19:17:51 pm »
I think the 40 gramms are no longer avaliable . the pressed in cups fall out .... . The others have 48 or something
Udo
«
Last Edit: March 20, 2009, 19:21:59 pm by Udo
»
Logged
www.Udobeckertuning.de
drgouk
Hero Member
Posts: 512
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #2 on:
March 20, 2009, 19:26:20 pm »
Another thing to consider with a longer lifter is the greater pushrod angle, from the lifter to the rocker, which could mean increased lifter bore wear. just a thought.
Logged
Zach Gomulka
Hero Member
Posts: 6991
Don't piss down my back and tell me it's raining.
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #3 on:
March 20, 2009, 21:17:11 pm »
The one on the left is a genuine Porsche lifter out of a 1968 912, it weighed in at right around 70 grams. The new VW lifter on the right is about 97 grams. Why not use genuine Porsche lifters? Why do they have to be aftermarket 40 or 48 gram lifters?
It did occur to me the pushrod angle would be greater, but how much (if any) greater would it be than in a Porsche engine? It would offer more pushrod clearance at the head, as well.
Logged
Born in the '80s, stuck in the '70s.
Jim Ratto
Hero Member
Posts: 7121
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #4 on:
March 20, 2009, 21:20:41 pm »
Quote from: Zach Gomulka on March 20, 2009, 21:17:11 pm
The one on the left is a genuine Porsche lifter out of a 1968 912, it weighed in at right around 70 grams. The new VW lifter on the right is about 97 grams. Why not use genuine Porsche lifters? Why do they have to be aftermarket 40 or 48 gram lifters?
It did occur to me the pushrod angle would be greater, but how much (if any) greater would it be than in a Porsche engine? It would offer more pushrod clearance at the head, as well.
is the radius on a 356 follower set up to track a VW lobe?
Logged
Sander/DVK
Hero Member
Posts: 631
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #5 on:
March 20, 2009, 21:44:19 pm »
Do someone something more about these lifters? Brand? The only thing I know is that their weight is only 40 gram.
Sorry for the crappy pic.
Logged
Der Vollgas Kreuzers
Zach Gomulka
Hero Member
Posts: 6991
Don't piss down my back and tell me it's raining.
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #6 on:
March 20, 2009, 22:30:32 pm »
Quote from: Jim Ratto on March 20, 2009, 21:20:41 pm
Quote from: Zach Gomulka on March 20, 2009, 21:17:11 pm
The one on the left is a genuine Porsche lifter out of a 1968 912, it weighed in at right around 70 grams. The new VW lifter on the right is about 97 grams. Why not use genuine Porsche lifters? Why do they have to be aftermarket 40 or 48 gram lifters?
It did occur to me the pushrod angle would be greater, but how much (if any) greater would it be than in a Porsche engine? It would offer more pushrod clearance at the head, as well.
is the radius on a 356 follower set up to track a VW lobe?
Good question. If it isn't, couldn't the face be ground to track properly?
Logged
Born in the '80s, stuck in the '70s.
louisb
Hero Member
Posts: 3274
Runs with Scissors
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #7 on:
March 20, 2009, 22:43:33 pm »
Quote from: Sander/DVK on March 20, 2009, 21:44:19 pm
Do someone something more about these lifters? Brand? The only thing I know is that their weight is only 40 gram.
Sorry for the crappy pic.
I have a set w/ the bushings installed in my mag case. I have heard there are issues with them though and plan to have the case rebushed and run the tool steel ones.
--louis
Logged
Louis Brooks
The Beatings Will Continue Until Moral Improves!
richie
Hero Member
Posts: 5687
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #8 on:
March 21, 2009, 13:40:53 pm »
i only know one person who tried them and they werent successfull,after the first failed attempt,he then had them reground at SLR to mathc his VW grind web cam and they failed again
cheers richie
Logged
Cars are supposed to be driven, not just talked about!!!
Good parts might be expensive but good advice is priceless
Sander/DVK
Hero Member
Posts: 631
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #9 on:
March 21, 2009, 14:04:18 pm »
I know enough.. Thanks for the feedback guys.
Logged
Der Vollgas Kreuzers
Udo
Hero Member
Posts: 2077
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #10 on:
March 21, 2009, 17:46:04 pm »
Quote from: louisb on March 20, 2009, 22:43:33 pm
Quote from: Sander/DVK on March 20, 2009, 21:44:19 pm
Do someone something more about these lifters? Brand? The only thing I know is that their weight is only 40 gram.
Sorry for the crappy pic.
I have a set w/ the bushings installed in my mag case. I have heard there are issues with them though and plan to have the case rebushed and run the tool steel ones.
--louis
That's a good idea
. I do the same when i get a customers engine with those big bushings
Udo
Logged
www.Udobeckertuning.de
Zach Gomulka
Hero Member
Posts: 6991
Don't piss down my back and tell me it's raining.
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #11 on:
March 21, 2009, 20:25:41 pm »
Quote from: richie,uk on March 21, 2009, 13:40:53 pm
i only know one person who tried them and they werent successfull,after the first failed attempt,he then had them reground at SLR to mathc his VW grind web cam and they failed again
cheers richie
Cheers for the info, Richie
Why did they fail??
Logged
Born in the '80s, stuck in the '70s.
richie
Hero Member
Posts: 5687
Re: Porsche 356/912 "Pencil Stem" Lifters?
«
Reply #12 on:
March 21, 2009, 21:21:49 pm »
Quote from: Zach Gomulka on March 21, 2009, 20:25:41 pm
Quote from: richie,uk on March 21, 2009, 13:40:53 pm
i only know one person who tried them and they werent successfull,after the first failed attempt,he then had them reground at SLR to mathc his VW grind web cam and they failed again
cheers richie
Cheers for the info, Richie
Why did they fail??
We were never sure,the lifter face just didnt seem to stand up to well,it had a strange pattern on it after a very short time,not pitting,but the surface was very rough and the cam didnt like it
cheers richie
Logged
Cars are supposed to be driven, not just talked about!!!
Good parts might be expensive but good advice is priceless
Pages:
[
1
]
« previous
next »
Jump to:
Please select a destination:
-----------------------------
Cal-look/High Performance
-----------------------------
=> Cal-look
=> Pure racing
=> Technical stuff
=> Top Racers lists
=> In Da Werks
-----------------------------
The Cal-look classifieds
-----------------------------
=> For sale!
=> Wanted
-----------------------------
Happenings
-----------------------------
=> Happenings
=> Scandinavian Cal-look Classic (the event)
-----------------------------
Tyre kicking
-----------------------------
=> Off Topic
Loading...