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biancovw
Samba Member
Joined: January 08, 2008
Posts: 59
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 Posted: Sun Jan 25, 2009 10:49 am Post subject: |
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it was run before and ready to be run again  |
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nsracing
Samba Member
Joined: November 16, 2003
Posts: 9744
Location: NOVA
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| Posted: Sun Jan 25, 2009 10:41 am Post subject: |
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I would be afraid to run the top cam. That is clearanced waay too much and will probably snap in half. That cam is probably the size of your pinky.  |
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biancovw
Samba Member
Joined: January 08, 2008
Posts: 59
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| Posted: Sun Jan 25, 2009 10:37 am Post subject: |
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stroker clearenced on lathe vs non stroker clearenced
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venomous-67
Samba Member
Joined: June 19, 2008
Posts: 90
Location: UK
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| Posted: Sat Jan 24, 2009 3:53 pm Post subject: |
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| speedy s wrote: |
IM RUNNING 5.5 SCAT H-BEAMS WITH 84 SCAT CRANK AND CB CLEARANCED ALLOY CASE, AFTER READING ABOUT SCAT FOLLOWERS IM STICKING WITH MY CB LIFTERS AND ENGLE CAM AND CLEARANCING MYSELF! I WOULD OF GONE FOR SCAT CAM IF I DIDNT NEED TO USE THIER LIFTERS!!!
sorry for the shouting didnt relize cap lock was on!!! |
I would use a Engle or even better a Webcam.
I had a Scat go flat after 1200 miles  |
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nsracing
Samba Member
Joined: November 16, 2003
Posts: 9744
Location: NOVA
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| Posted: Sat Jan 24, 2009 2:19 pm Post subject: |
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| Now..that is a CAM! Very nice. |
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venomous-67
Samba Member
Joined: June 19, 2008
Posts: 90
Location: UK
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| Posted: Sat Jan 24, 2009 2:00 pm Post subject: |
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| nsracing wrote: |
Here is another idea of notching/clearancing a camshaft. Between the lobes are also cleaned up on a cylindrical grinder to improve windage.
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I had my Billet Clay Smith cam done the same way.
Much stronger. |
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neil68
Samba Member
Joined: March 17, 2007
Posts: 3448
Location: Calgary, Canada
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| Posted: Fri Jan 23, 2009 4:01 pm Post subject: clearance |
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| speedy s wrote: |
just recieved e-mail from darren at drd, he says if i go for scat sc1 cam i have to use scat lifters do go with it!! trouble is ive just bought 28mm cb lightweights!!!
so do i clearance engle cam and use my lifters or buy scat cam and lifters instead??
is the scat cam better i.e less likely to flat the lobes??
do you think i will have to crearance cam if im using scat forged 84mm chevy journal crank and rods??? |
I clearanced my similar combo with hand tools such as a dremel style grinder. Yes, you will have to clearance the cam...if you look at the cam where it says D4, you can see how close the rod gets to the cam. I ground my Engle cam on the sides (rather than all the way around like a lathe).
I clearanced the case and cam bearings/supports, etc, with hand tools. It doesn't look as clean as the pros posted above, but I didn't have any VW machine shops local. This was for an 84 mm crank with chevy journals, 5.5" H-beams, FK8 cam, Bugpack race lifters, so it sounds similar to your plan:
_________________
Neil.
Der Kleiner Rennwagens
‘68 Beetle 2332 cc, 204 WHP
12.5 seconds @ 108 mph
Dynojet Test: https://www.youtube.com/watch?v=M9B_H3eklAo |
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nsracing
Samba Member
Joined: November 16, 2003
Posts: 9744
Location: NOVA
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| Posted: Thu Jan 22, 2009 3:43 pm Post subject: |
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The day was too good that day to be inside. The engine was out for picture-taking.
I can't wait for summer. |
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1961bluebug
Samba Member
Joined: November 11, 2002
Posts: 1137
Location: Czech Republic, Europe
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| Posted: Thu Jan 22, 2009 1:57 pm Post subject: |
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I always drool above this cam..sir, can you make me one? 
_________________
|82x94|
1961 Deluxe beetle, 1971 type 181, 1968 T2a Baywindow, 1973 Type 147 "Swiss Fridolin"(sold), 1966 Deluxe sedan (sold), 1983 "Silver Bug" edition (sold), 1961 beetle (sold) |
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turboblue
Samba Member
Joined: October 09, 2003
Posts: 4216
Location: Central Indiana
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| Posted: Thu Jan 22, 2009 1:52 pm Post subject: |
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| nsracing wrote: |
Here is another idea of notching/clearancing a camshaft. Between the lobes are also cleaned up on a cylindrical grinder to improve windage.
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You building that engine out in the garden Nick?.............. 
| 1961bluebug wrote: |
kind of related question - what is the recommended or ideal compression ratio for FK-8? From what I read it varies between 9.0-10.1:1?
Thanks, |
Yeah 9-10:1 will make you a sweet running engine.
_________________
Gary
Turbo VW Sand Drag Buggy
"If you don't run into the Devil every once in awhile, you must be going in the same direction!" |
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nsracing
Samba Member
Joined: November 16, 2003
Posts: 9744
Location: NOVA
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| Posted: Thu Jan 22, 2009 1:42 pm Post subject: |
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Here is another idea of notching/clearancing a camshaft. Between the lobes are also cleaned up on a cylindrical grinder to improve windage.
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 79598
Location: Sneaking up behind you
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| Posted: Wed Jan 21, 2009 7:30 am Post subject: |
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I'm running 9.5 with mine.
_________________
Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare
עַם יִשְׂרָאֵל חַי |
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1961bluebug
Samba Member
Joined: November 11, 2002
Posts: 1137
Location: Czech Republic, Europe
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| Posted: Wed Jan 21, 2009 7:12 am Post subject: |
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kind of related question - what is the recommended or ideal compression ratio for FK-8? From what I read it varies between 9.0-10.1:1?
Thanks,
_________________
|82x94|
1961 Deluxe beetle, 1971 type 181, 1968 T2a Baywindow, 1973 Type 147 "Swiss Fridolin"(sold), 1966 Deluxe sedan (sold), 1983 "Silver Bug" edition (sold), 1961 beetle (sold) |
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speedy s
Samba Member
Joined: July 21, 2008
Posts: 121
Location: uk
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| Posted: Thu Oct 16, 2008 3:09 pm Post subject: |
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IM RUNNING 5.5 SCAT H-BEAMS WITH 84 SCAT CRANK AND CB CLEARANCED ALLOY CASE, AFTER READING ABOUT SCAT FOLLOWERS IM STICKING WITH MY CB LIFTERS AND ENGLE CAM AND CLEARANCING MYSELF! I WOULD OF GONE FOR SCAT CAM IF I DIDNT NEED TO USE THIER LIFTERS!!!
sorry for the shouting didnt relize cap lock was on!!! |
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turboblue
Samba Member
Joined: October 09, 2003
Posts: 4216
Location: Central Indiana
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| Posted: Thu Oct 16, 2008 8:14 am Post subject: |
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| 1961bluebug wrote: |
| turboblue wrote: |
| 1961bluebug wrote: |
| what is the safe limit when clearancing the cam on a lathe? I need to clearance my FK8 to use with 82mm crank, VW journals. Clearancing on a lathe seems comfortable. Thanks. |
What rod?
H-beams have a smaller cap than I-beams and need less of course.
Valve springs and over the nose pressures figure into that number too..........somehow........ |
H beam rod 5.4 length |
H-beam should require minimal clearance, similar to dubkrzy's picture.
With an 84 stroke, you really need to check the piston/case clearance at BDC with that short rod.
_________________
Gary
Turbo VW Sand Drag Buggy
"If you don't run into the Devil every once in awhile, you must be going in the same direction!" |
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1961bluebug
Samba Member
Joined: November 11, 2002
Posts: 1137
Location: Czech Republic, Europe
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| Posted: Wed Oct 15, 2008 11:33 pm Post subject: |
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| turboblue wrote: |
| 1961bluebug wrote: |
| what is the safe limit when clearancing the cam on a lathe? I need to clearance my FK8 to use with 82mm crank, VW journals. Clearancing on a lathe seems comfortable. Thanks. |
What rod?
H-beams have a smaller cap than I-beams and need less of course.
Valve springs and over the nose pressures figure into that number too..........somehow........ |
H beam rod 5.4 length
_________________
|82x94|
1961 Deluxe beetle, 1971 type 181, 1968 T2a Baywindow, 1973 Type 147 "Swiss Fridolin"(sold), 1966 Deluxe sedan (sold), 1983 "Silver Bug" edition (sold), 1961 beetle (sold) |
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dubkrzy
Samba Member
Joined: July 02, 2006
Posts: 485
Location: One step behind
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| Posted: Wed Oct 15, 2008 10:00 pm Post subject: |
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Here is my fk-8 clearenced by Competition Engineering
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perrib
Samba Member
Joined: September 14, 2004
Posts: 3402
Location: Chandler, Az
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| Posted: Wed Oct 15, 2008 9:50 pm Post subject: |
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| I'm installed a Demello 82 mm crank and Rimco Super rods today the cam clearancing was minimal and took about 10 minutes with a grinder. |
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Hophead
Samba Member
Joined: January 03, 2005
Posts: 940
Location: Chico,Ca
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| Posted: Wed Oct 15, 2008 7:01 pm Post subject: |
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| Unkl Ian wrote: |
| 1961bluebug wrote: |
| Clearancing on a lathe seems comfortable. Thanks. |
Clearancing on the lathe takes off material all the way around the diameter,
which makes the cam weaker than if it were clearanced on a mill. |
Or clearenced with a die grinder.... I will never use a scat lifter in my motor after comparing them to CB lifters under the microscope. Regardless of who is pushing them. All the big builders say that we the home builders are doing something wrong yet I never seen them spill their secrets as to what they do right..... Do a search on CB lightweights VS Scats and see what comes up... For a motor that is $ 3-7k why risk it.
_________________
70' Beetle Pan off Resto
2110cc
82 X 90.5
P&P 043 40x35.5
9.6-1 comp
FK-8
48 IDA |
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Unkl Ian
Samba Member
Joined: September 11, 2008
Posts: 288
Location: Near Toronto
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| Posted: Wed Oct 15, 2008 6:07 pm Post subject: |
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| 1961bluebug wrote: |
| Clearancing on a lathe seems comfortable. Thanks. |
Clearancing on the lathe takes off material all the way around the diameter,
which makes the cam weaker than if it were clearanced on a mill. |
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