my 1956cc build for my buggy

rammintwins · Posted: Fri Mar 08, 2013 11:52 am Post subject: my 1956cc build for my buggy

Ok after all my research and still researching I started the mock up stages for my build. This is what I have so far.
DPR 76 mm crank 10 on mains standard on rods
scat 5.5 I beams with arp 2000 bolts
Engle 120 cam indexed straight up
clevite rod bearing
silverline on the mains and cam double thrust
case is dual relief 20 on the bore .

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rammintwins · Posted: Fri Mar 08, 2013 12:24 pm Post subject:

here is the crank gear set install.

Here is some of the measurements I got

All 4 rod journals were the same

rammintwins · Posted: Fri Mar 08, 2013 5:15 pm Post subject:

my only concern now is that will I need that windage tray with a sump and stainless steel push rod tubes with the extended ends. but during my build if any sees a problem please say sumthing lol

KIDSPEED · Samba Member Joined: January 14, 2007 Posts: 212

Sorry to point this out but I think you need to ammend your thread title to "1956" not 1965.

rammintwins · Posted: Fri Mar 08, 2013 5:48 pm Post subject:

crap! i thought i did that lol

VIN · Posted: Sun Mar 10, 2013 2:54 pm Post subject:

are you going to leave the oil clearance at a thou and a half?
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rammintwins · Posted: Sun Mar 10, 2013 3:36 pm Post subject:

VW air cooled engines call for .0008" - .0028" for connecting rod clearance. Seems like this is probably an acceptable average... I do plan on checking with a bore guage as well

modok · Posted: Sun Mar 10, 2013 3:49 pm Post subject:

For what bearings?
Clevite says the spec for their 780p bearings is .0015-.0038, you are right on the minimum.

rammintwins · Posted: Sun Mar 10, 2013 4:07 pm Post subject:

yeah they are CB clevite 780 P and was just reading up on this post
http://www.thesamba.com/vw/forum/viewtopic.php?t=5...p;start=20
so it looks like ill try another set of bearings and see what that does,

rammintwins · Posted: Sat Nov 22, 2014 10:31 am Post subject:

Well it has been a year and a halfsince i have touched this threadand my motor, life has gotten in the way and I got back into sportfishing again, as wellas bought new reels and having new rods built.. Ok back on my buggy build i started to clearance the block for the crank and i need to touch up a few places more. i alos beenreading other builds and used some tricks from thoseas well, clearance the cam bearing on the right side of the case and also matched the oil pump holes to the block, I guess i was having alittle too much fun with the dremel lol.. i will post pics later on those, I am still in the mock up stage on the short block side of it.

I have a few concerns though,,, Anybody use a windage tray anymore?
and on my rod bearing clearance at minimum would you run it as is ?
I really want to keep the clevites but is kolbens just as good ?

The cam is at zero backlash as well with doulble thrusts and the cam doesnt walk the gear when i test it so i think i am good there.

modok · Posted: Sat Nov 22, 2014 3:06 pm Post subject:

Feel free to try other bearings, but I do not know if you will find any thinner. All brands seem to check right at .055 thickness.

Clevite bearings do run plenty of crush so rods can be opened to 2.2765 without worry.

the .0015 clearance can work OK but you must stay with 10-30 weight oil or thinner, and not push engine too hard when cold!

rammintwins · Posted: Sat Nov 22, 2014 6:34 pm Post subject:

so when i take everything back to the machine shop to have everything balanced i can have them massage the rod journals and it may open up alittle more using the same bearing?

vugbug68 · Posted: Sat Nov 22, 2014 6:58 pm Post subject:

you don't need a windage tray unless your going to be track racing or something, I just have a CB thin sump and the windage pushrod tubes and I've never had a problem with sucking air even while drifting, But my past engines that did not have sumps would turn the oil light on after a drift (not good)
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rammintwins · Posted: Sat Nov 22, 2014 7:01 pm Post subject:

dunes is what this motor is mainly going to be used for, but the buggy will be on the street from time to time

vugbug68 · Posted: Sat Nov 22, 2014 7:06 pm Post subject:

Hmm, if you use a sump then you should be ok, but you may want to talk to some sand guys, sumps work great for hard cornering but I don't know about off road stuff. Dry sump is the best but pricey
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71 Super - Backroad Thrasher
66 Corvair - Weekend Cruiser
90 4 Runner - Muddin

modok · Posted: Sat Nov 22, 2014 7:08 pm Post subject:

rammintwins · Posted: Sat Nov 22, 2014 7:51 pm Post subject:


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