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risk
Samba Member
Joined: June 24, 2004
Posts: 710
Location: Stumpbroke, Arkansas
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 Posted: Thu Dec 10, 2009 9:52 am Post subject: Dry sump engine.. going back to wet sump, concerns? |
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I recently bought two motors off a vintage midget racer. they are both set up for dry sump oiling. I want to run them in street cars, and go back to the stock wet sump configuration. Are there any things done inside the case that i should change look for to go back to wet sump?
Two things i noticed off the bat are the oil pump studs, and the dipstick hole has been threaded and plugged. |
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Stripped66
Samba Member
Joined: May 31, 2005
Posts: 3470
Location: Charleston, SC
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| Posted: Thu Dec 10, 2009 10:23 am Post subject: Re: Dry sump engine.. going back to wet sump, concerns? |
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| risk wrote: |
Are there any things done inside the case that i should change look for to go back to wet sump?
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Potentially. How is the current dry-sump configuration scavenging the case? Does it scavenge from the bottom of the sump (likely) or through the stock oil pick-up tube? If the latter, then changing back to a wet sump configuration could be simple. However, if the oil pick-up tube was omitted from the engine build, then it becomes a bit more tricky. The easiest solution to this problem is to split the case and reinstall the oil pick-up. *However* you could feed the sump-mounted oil pick-up back to the case on the inlet side of the oil pump. It would require some drilling, tapping, and plugging, but it can be done.
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| 66brm wrote: |
| Bodacious wrote: |
| Why not just make a custom set of wires with a Y splice in them. Then you could just run one distributor. |
I don't think electrickery works that way |
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risk
Samba Member
Joined: June 24, 2004
Posts: 710
Location: Stumpbroke, Arkansas
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| Posted: Thu Dec 10, 2009 1:35 pm Post subject: |
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| they both scavenge from the bottom of the sump, with an autocraft sump extension. splitting the case is no big deal, i wanted to check the bearing clearances anyways. they run a pulley with only timing marks and no belt groove. like a drag button. will the case accept the standard size sand seal? |
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miniman82
Samba Swamp Donkey
Joined: March 22, 2005
Posts: 9515
Location: Southern Maryland
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| Posted: Thu Dec 10, 2009 1:40 pm Post subject: |
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Midget engines? Will you run them on the street, or racing still?
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Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747
| Glenn wrote: |
| satterley_sr wrote: |
I just wanted to bitch but I'm getting no sympathy. |
Welcome to the Samba. |
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risk
Samba Member
Joined: June 24, 2004
Posts: 710
Location: Stumpbroke, Arkansas
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| Posted: Thu Dec 10, 2009 1:45 pm Post subject: |
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| building them for the street |
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risk
Samba Member
Joined: June 24, 2004
Posts: 710
Location: Stumpbroke, Arkansas
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| Posted: Fri Dec 11, 2009 7:09 am Post subject: |
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| miniman82 wrote: |
| Midget engines? Will you run them on the street, or racing still? |
Is there some concern about midget engines? they were ran on alchohol and are super clean inside and out.. |
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Jake Raby
Samba Member
Joined: August 23, 2003
Posts: 7433
Location: Aircooled Heaven USA
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| Posted: Fri Dec 11, 2009 7:26 am Post subject: |
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The engine's internal oil system could have been optimized for the dry sump arrangement. If this occurred it may be impossible to wet sump the engine without complications.
When I build an engine thats designed to optimize with a dry sump system it would never be compatible with a wet sump again without disassembly.
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Jake Raby
Raby Engine Development
www.rabyenginedevelopment.com
"I've never given anyone Hell, I just told them the truth and they thought it was Hell" |
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Type 5 Joe
Banned
Joined: January 18, 2003
Posts: 1795
Location: Oregon
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| Posted: Fri Dec 11, 2009 8:00 am Post subject: |
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What mods do you do Jake?
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If you would like to contact me, just email through one of my ads on here...
I don't use the P.M. service on here. |
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miniman82
Samba Swamp Donkey
Joined: March 22, 2005
Posts: 9515
Location: Southern Maryland
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| Posted: Fri Dec 11, 2009 10:34 am Post subject: |
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| risk wrote: |
| Is there some concern about midget engines? they were ran on alchohol and are super clean inside and out.. |
Oh nothing in particular, I was just thinking they are probably cammed out so street driving ought to be fun. You know, high winding engines. 
_________________
Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747
| Glenn wrote: |
| satterley_sr wrote: |
I just wanted to bitch but I'm getting no sympathy. |
Welcome to the Samba. |
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risk
Samba Member
Joined: June 24, 2004
Posts: 710
Location: Stumpbroke, Arkansas
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| Posted: Fri Dec 11, 2009 11:38 am Post subject: |
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| miniman82 wrote: |
| risk wrote: |
| Is there some concern about midget engines? they were ran on alchohol and are super clean inside and out.. |
Oh nothing in particular, I was just thinking they are probably cammed out so street driving ought to be fun. You know, high winding engines. |
one has a bugpack 4062.. the other has a BMR 18.4 which i haven't found any info on. i'm not at the point in either of these builds for cam selection yet.
| Jake Raby wrote: |
| The engine's internal oil system could have been optimized for the dry sump arrangement. |
I can ask the guy i bought the engines from.. however he is 82 and has been a little foggy about most of the details on these..
still not sure what case this one is.. the other case is vw mexico.
http://www.thesamba.com/vw/forum/viewtopic.php?t=384688&highlight=todd+francis |
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Jake Raby
Samba Member
Joined: August 23, 2003
Posts: 7433
Location: Aircooled Heaven USA
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| Posted: Fri Dec 11, 2009 11:45 am Post subject: |
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| miniman82 wrote: |
| risk wrote: |
| Is there some concern about midget engines? they were ran on alchohol and are super clean inside and out.. |
Oh nothing in particular, I was just thinking they are probably cammed out so street driving ought to be fun. You know, high winding engines. |
The ones I have worked with burned alcohol...
_________________
Jake Raby
Raby Engine Development
www.rabyenginedevelopment.com
"I've never given anyone Hell, I just told them the truth and they thought it was Hell" |
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jesus_chrysler
Samba Member
Joined: March 04, 2009
Posts: 425
Location: Wisconsin
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| Posted: Fri Dec 11, 2009 1:34 pm Post subject: |
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| is there a reason why you do not want to run the dry sump? It has many advantages over the wet sump. |
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risk
Samba Member
Joined: June 24, 2004
Posts: 710
Location: Stumpbroke, Arkansas
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| Posted: Fri Dec 11, 2009 2:52 pm Post subject: |
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| jesus_chrysler wrote: |
| is there a reason why you do not want to run the dry sump? It has many advantages over the wet sump. |
cost mostly, and time to fab and install.. I don't have the pump, lines, tank etc. I figure it will be cheaper and easier to go back to wet sump. Its going in a mild street driven car so there really is no need for me to go dry. |
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