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GARRICK.CLARK
Samba Member
Joined: June 30, 2012
Posts: 1268
Location: Lancashire UK
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 Posted: Thu May 14, 2020 2:25 am Post subject: Re: Notching the rods |
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| Mine are 1700 type 4 rods, a lot more material than a type 1 rod, enabling the cut to be deeper . That pic sure does look deeper than 1.5 mm |
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jimmyhoffa
Samba Member
Joined: February 16, 2014
Posts: 1178
Location: St. Louis
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| Posted: Wed May 13, 2020 9:10 pm Post subject: Re: Notching the rods |
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FYI this is what it looks like 1.5mm deep on my SCAT I-beams.
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1974 Chenowth 2RL #1244 Street Legal
My other car isn't ridiculous. |
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GARRICK.CLARK
Samba Member
Joined: June 30, 2012
Posts: 1268
Location: Lancashire UK
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| Posted: Tue May 12, 2020 9:12 am Post subject: Re: Notching the rods |
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| Yes both side of the rod, not too deep 3 mm maybe |
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oprn
Samba Member
Joined: November 13, 2016
Posts: 14794
Location: Western Canada
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| Posted: Tue May 12, 2020 8:58 am Post subject: Re: Notching the rods |
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| A chainsaw sharpening file works well. I have never seen it discussed but I assume both sides need to be done. That's what I do anyway. |
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GARRICK.CLARK
Samba Member
Joined: June 30, 2012
Posts: 1268
Location: Lancashire UK
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| Posted: Tue May 12, 2020 8:15 am Post subject: Re: Notching the rods |
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| The notch has to be a semi circle. If its a V notch cracks can form. |
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oprn
Samba Member
Joined: November 13, 2016
Posts: 14794
Location: Western Canada
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| Posted: Tue May 12, 2020 7:54 am Post subject: Re: Notching the rods |
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| And then they have to use tar for oil to compensate... |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 23148
Location: Oklahoma City
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| Posted: Tue May 12, 2020 7:46 am Post subject: Re: Notching the rods |
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Be careful here.....what you say ...because you do not know what condition teh parts are of the person you are speaking to:
Ohio Tom Said:
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Has exactly zero affect on oil pressure.
Rather it channels the oil seeping out all around the rod into one or two places to exit.
So, you are taking oil that was leaking all around and directing it to an exit.
Hopefully, it gets thrown onto the rods and pistons. |
and....
OPRN said:
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| Again educate me here, I fail to see how those little notches could have an effect on oil pressure. The clearance between the crank and the rod dictate the pressure, by the time the oil gets to the edge it has already had it's kick at the ball and is leaving the arena anyway. All you are doing is showing it which exit to take. |
In a perfect world and engine you would both be dead on and I totally agree.
However bear in mind when you speak to a general audience in these forums....that far too many are not experts always employing every technique available to build their engine....and most importantly not everyone is using brand new, aftermarket rods or a new or welded crank...even when they should.
One of the biggest losses of oil pressure ....is at the rods....when bearing clearance is excessive....even .001" larger than ideal....especially when ADDED with excessive rod side clearance.
The vast majority of stock cranks laying around these days when coupled with a set of stock rods....will generally have rod side clearances that are up near the top of the...overly generous range listed in most books for VW. Too many people take what are really a wear limit ....as a usable spec....and figure if the rod side clearances are within that wide range....everything is peachy! And it will run just fine....but with a good bit of oil pressure loss.
However in an engine like I just described has oil notches added in....that can be quite bit of oil pressure loss. Then we see people getting into adding larger oil pumps....and then piddling with the oil pressure relief valve....etc...etc...etc.
Ray |
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Dan Ruddock
Samba Member
Joined: October 25, 2012
Posts: 3668
Location: Sarasota, in my adopted state of Florida
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| Posted: Tue May 12, 2020 7:35 am Post subject: Re: Notching the rods |
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| Drilling a hole in the rod and brg that lines up with rod journal feed hole is more effective. The Porsche 911 system is even better as it sprays 100% of the time if the oil pressure is above the nozzle valve threshold (will still have good pressure at idle). I did the 911 system on a VW once, worked well. Dan |
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Ohio Tom
Samba Member
Joined: February 09, 2006
Posts: 1662
Location: Marshallville Ohio
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| Posted: Tue May 12, 2020 6:50 am Post subject: Re: Notching the rods |
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Has exactly zero affect on oil pressure.
Rather it channels the oil seeping out all around the rod into one or two places to exit.
So, you are taking oil that was leaking all around and directing it to an exit.
Hopefully, it gets thrown onto the rods and pistons. |
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oprn
Samba Member
Joined: November 13, 2016
Posts: 14794
Location: Western Canada
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| Posted: Tue May 12, 2020 4:00 am Post subject: Re: Notching the rods |
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| Again educate me here, I fail to see how those little notches could have an effect on oil pressure. The clearance between the crank and the rod dictate the pressure, by the time the oil gets to the edge it has already had it's kick at the ball and is leaving the arena anyway. All you are doing is showing it which exit to take. |
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UK Luke 72
Samba Member
Joined: September 07, 2011
Posts: 2875
Location: Little Britain
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modok
Samba Member
Joined: October 30, 2009
Posts: 27674
Location: Colorado Springs
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| Posted: Mon May 11, 2020 5:25 pm Post subject: Re: Notching the rods |
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| yes |
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dubman67
Samba Member
Joined: April 10, 2003
Posts: 299
Location: Big Sky Country
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| Posted: Mon May 11, 2020 5:18 pm Post subject: |
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| 1961bluebug wrote: |
found a pic of this mod on Pauter website. If this is provided by The Man himself, it will be good enough for me on my H-beams.
this pic is a courtesy of Pauter Machine
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Old thread (I searched, yay!)
Do the grooves go on both sides of the connecting rod?
_________________
67 Bug
62 Double Cab
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"At 17 got my first Volkswagen...and mastered the life long art of dragin...." Ice Cube |
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manxracer1
Samba Member
Joined: December 07, 2007
Posts: 536
Location: Escondido calif.
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| Posted: Fri Dec 19, 2008 11:54 am Post subject: oiling |
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I did this to my Rimco super rods 26 years ago. If it was not for the NOS I would have the same pistons & cyl on there.
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1960 vw Manx
My photo's & video's
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Lionhart94010
Samba Member
Joined: January 04, 2005
Posts: 1418
Location: SF Bay Area / Silicon Valley / So Cal
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| Posted: Fri Dec 19, 2008 11:03 am Post subject: |
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I Notched my 5.5 CB Rods for my 78.8x90.5 Bus engine, looking forwards to cooler running pistons, and longer P&C life :0)
_________________
Current VWs 71 T2 Westy SO-72/6(Miami), 71 Crew Cab, 2015 GSW TDI
Other owned VW’s 59, 68 1500s, 69 & 71 Bug’s; 72 & 73 S-Bug’s; 67 Westy, 67 Deluxe, Other 71 DC, 72 KG GT that now lives in Australia, 12 JSW TDI, 2015 GSW TDI, 2023 Tiguan
VW technical information sights
thesamba - www.ratwell.com - www.shoptalkforums.com/ - www.vw-resource.com - http://www.type2.com/
http://bobhooversblog.blogspot.com/ - www.aircooled.net/gnrlsite/resource/articles.htm |
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stoneloco808
Samba Member
Joined: June 15, 2007
Posts: 658
Location: Pakalolo Country, HI
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| Posted: Fri Dec 19, 2008 10:49 am Post subject: |
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| I had these mods done on my Carrillo rods. |
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1961bluebug
Samba Member
Joined: November 11, 2002
Posts: 1137
Location: Czech Republic, Europe
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| Posted: Fri Dec 19, 2008 6:53 am Post subject: |
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found a pic of this mod on Pauter website. If this is provided by The Man himself, it will be good enough for me on my H-beams.
this pic is a courtesy of Pauter Machine
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|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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Hophead
Samba Member
Joined: January 03, 2005
Posts: 940
Location: Chico,Ca
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| Posted: Tue Sep 16, 2008 10:34 pm Post subject: |
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I was running a 26mm pump and I had two to three times the notching as the 911 mod and the only time I had oil pressure problems was from starvation in tight turns getting on the freeway..... a deep sump took care of that.
I do not believe that pressure drop is that bad.... the benefit is more flow through the conrod bearings and that would be good. That was what I was looking for when I did it.
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2110cc
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Lionhart94010
Samba Member
Joined: January 04, 2005
Posts: 1418
Location: SF Bay Area / Silicon Valley / So Cal
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| Posted: Tue Sep 16, 2008 4:02 pm Post subject: |
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Great Post,
Looks like just the thing for a hard working T1 bus motor with a 30mm oil pump; any idea if and if so how much it would lower the oil pressure on the con rod bearings?
_________________
Current VWs 71 T2 Westy SO-72/6(Miami), 71 Crew Cab, 2015 GSW TDI
Other owned VW’s 59, 68 1500s, 69 & 71 Bug’s; 72 & 73 S-Bug’s; 67 Westy, 67 Deluxe, Other 71 DC, 72 KG GT that now lives in Australia, 12 JSW TDI, 2015 GSW TDI, 2023 Tiguan
VW technical information sights
thesamba - www.ratwell.com - www.shoptalkforums.com/ - www.vw-resource.com - http://www.type2.com/
http://bobhooversblog.blogspot.com/ - www.aircooled.net/gnrlsite/resource/articles.htm |
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1961bluebug
Samba Member
Joined: November 11, 2002
Posts: 1137
Location: Czech Republic, Europe
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| Posted: Tue Sep 16, 2008 1:29 am Post subject: |
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thank you very much!
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|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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