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Author Topic: CB750 Wet Sump Conversion - Sumpthing  (Read 74236 times)

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Offline gschuld

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #150 on: March 06, 2018, 07:21:10 PM »
Quote from: voxonda on March 06, 2018, 12:33:41 PM
Major set back......primary chains are out of spec. Damn......

PM sent Rob

George
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Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #151 on: March 07, 2018, 10:48:47 AM »
Well, despite the setback and thanks to the help I received, and a day away, we are back in the game. Time is ticking for the new season and a lot needs to be done still. Parts for the pump are coming in tomorrow. Bolts for the sump arrived today, so can pre-assemble tomorrow to check out dimensions for the new exhaust to be build. After that the engine comes out and will be rebuild.............to be continued.
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Offline Bert Jan

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #152 on: March 07, 2018, 01:42:40 PM »
Quote from: voxonda on March 07, 2018, 10:48:47 AM
Well, despite the setback and thanks to the help I received, and a day away, we are back in the game. Time is ticking for the new season and a lot needs to be done still. Parts for the pump are coming in tomorrow. Bolts for the sump arrived today, so can pre-assemble tomorrow to check out dimensions for the new exhaust to be build. After that the engine comes out and will be rebuild.............to be continued.

You're quite the busy fellow then!

Just to clearify this, the normal kit (the one we sell) is a complete kit with bolts and everything in it. I gave Rob a final prototype to fiddle around with so that's why he had no hardware ;)
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Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #153 on: March 07, 2018, 02:24:34 PM »
No problem, BJ. Got a stack of bolts in, so let the fight begin. Almost everything on hand now to pre-assemble.
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Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #154 on: March 08, 2018, 01:10:12 AM »
So this morning came around to mount the wet sump and both blockingplates. Now can work on the exhaust.
Think it looks great so far.
BIG thanks to George for having me buy his HD primary and camchains, very grateful to him.
« Last Edit: March 08, 2018, 01:13:11 AM by voxonda »
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Offline gschuld

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #155 on: March 08, 2018, 04:39:19 AM »
Looking good Rob.👍

Give those new chains a workout!  They will be on their way in 3 hours.

George
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Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #156 on: March 08, 2018, 06:32:54 AM »
Working on the oilcooler setup. Not happy with the cooler in the pressure side, so making some plumbing to fit into the return.

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Offline gschuld

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #157 on: March 08, 2018, 07:41:34 AM »
New chains are on the way Rob.

George
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Offline slikwilli420

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #158 on: March 08, 2018, 07:41:54 AM »
Quote from: voxonda on March 08, 2018, 06:32:54 AM
Working on the oilcooler setup. Not happy with the cooler in the pressure side, so making some plumbing to fit into the return.

Looking good. Side note, I really like how you couterbored the clutch cover to sink in the socket screws, looks factory. If you weren't familiar with these engines, you would think it came that way. I might have to steal the idea.
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Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #159 on: March 08, 2018, 09:01:03 AM »
Quote from: gschuld on March 08, 2018, 07:41:34 AM
New chains are on the way Rob.

George

Thanks sooo much, G.
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Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #160 on: March 08, 2018, 09:04:33 AM »
Quote from: slikwilli420 on March 08, 2018, 07:41:54 AM
Quote from: voxonda on March 08, 2018, 06:32:54 AM
Working on the oilcooler setup. Not happy with the cooler in the pressure side, so making some plumbing to fit into the return.

Looking good. Side note, I really like how you couterbored the clutch cover to sink in the socket screws, looks factory. If you weren't familiar with these engines, you would think it came that way. I might have to steal the idea.

Of course you are welcome to that. Also did the, new to mount, valvecover and the covers on otherside of engine.
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Offline slikwilli420

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #161 on: March 08, 2018, 09:26:52 AM »
Quote from: voxonda on March 08, 2018, 09:04:33 AM
Quote from: slikwilli420 on March 08, 2018, 07:41:54 AM
Quote from: voxonda on March 08, 2018, 06:32:54 AM
Working on the oilcooler setup. Not happy with the cooler in the pressure side, so making some plumbing to fit into the return.

Looking good. Side note, I really like how you couterbored the clutch cover to sink in the socket screws, looks factory. If you weren't familiar with these engines, you would think it came that way. I might have to steal the idea.

Of course you are welcome to that. Also did the, new to mount, valvecover and the covers on otherside of engine.

Very cool. Not to derail this conversation, but could you post a few pics please??
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All you gotta do is do what you gotta do.

Vintage Speed Parts Mashup: http://forums.sohc4.net/index.php?topic=133638.0
Rickman CR Parts Kit Refresh: http://forums.sohc4.net/index.php/topic,154837.0.html
AHRMA CB750 Racer: http://forums.sohc4.net/index.php/topic,158461.0.html
AHRMA Superbike Heavyweight Racer: http://forums.sohc4.net/index.php/topic,173120.0.html
'76F CB750 Patina Redemption: http://forums.sohc4.net/index.php/topic,174871.0.html

Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #162 on: March 09, 2018, 02:21:34 AM »

Only one from awhile ago, unblasted and unsprayed.


« Last Edit: March 09, 2018, 04:52:24 AM by voxonda »
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Offline gschuld

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #163 on: March 09, 2018, 04:01:05 AM »
Rob,

What is the purpose of the two extra mount locations?  Is it for attaching some sort of cam cover to upper frame mount?   They don't appear to be  in the right locations for cam tower support(plus you'd need 4 per side)

George
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Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #164 on: March 09, 2018, 04:57:12 AM »
Quote from: gschuld on March 09, 2018, 04:01:05 AM
Rob,

What is the purpose of the two extra mount locations?  Is it for attaching some sort of cam cover to upper frame mount?   They don't appear to be  in the right locations for cam tower support(plus you'd need 4 per side)

George

Hi George,

Something I did on my DOHC racer, thanks to Brent Hyde aka Captain here. Use a small (-3)line to de-air the oiling system at the top of oilfilter and use that to, extra, oil the cam bearings and or camchain by spraying through a nozzle.
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Offline slikwilli420

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #165 on: March 09, 2018, 06:19:10 AM »
Quote from: voxonda on March 09, 2018, 04:57:12 AM
Quote from: gschuld on March 09, 2018, 04:01:05 AM
Rob,

What is the purpose of the two extra mount locations?  Is it for attaching some sort of cam cover to upper frame mount?   They don't appear to be  in the right locations for cam tower support(plus you'd need 4 per side)

George

Hi George,

Something I did on my DOHC racer, thanks to Brent Hyde aka Captain here. Use a small (-3)line to de-air the oiling system at the top of oilfilter and use that to, extra, oil the cam bearings and or camchain by spraying through a nozzle.

You are full of neat little tricks. Would love to see some pictures of that setup as well. Did you find it controlled wear on internals any better than without it?
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All you gotta do is do what you gotta do.

Vintage Speed Parts Mashup: http://forums.sohc4.net/index.php?topic=133638.0
Rickman CR Parts Kit Refresh: http://forums.sohc4.net/index.php/topic,154837.0.html
AHRMA CB750 Racer: http://forums.sohc4.net/index.php/topic,158461.0.html
AHRMA Superbike Heavyweight Racer: http://forums.sohc4.net/index.php/topic,173120.0.html
'76F CB750 Patina Redemption: http://forums.sohc4.net/index.php/topic,174871.0.html

Offline gschuld

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #166 on: March 09, 2018, 08:56:00 AM »
Quote from: slikwilli420 on March 09, 2018, 06:19:10 AM
Quote from: voxonda on March 09, 2018, 04:57:12 AM
Quote from: gschuld on March 09, 2018, 04:01:05 AM
Rob,

What is the purpose of the two extra mount locations?  Is it for attaching some sort of cam cover to upper frame mount?   They don't appear to be  in the right locations for cam tower support(plus you'd need 4 per side)

George

Hi George,

Something I did on my DOHC racer, thanks to Brent Hyde aka Captain here. Use a small (-3)line to de-air the oiling system at the top of oilfilter and use that to, extra, oil the cam bearings and or camchain by spraying through a nozzle.

You are full of neat little tricks. Would love to see some pictures of that setup as well. Did you find it controlled wear on internals any better than without it?

Very interesting.🤔.  You smart fellas are keeping me entertained for sure👍.

George
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Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #167 on: March 10, 2018, 09:30:34 AM »
Happy with outcome of today, new routing of oillines to work with the wet sump. Tests are first without cooler and depending on outcome will choose what cooler size to use.
« Last Edit: March 10, 2018, 10:03:17 AM by voxonda »
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Offline gschuld

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #168 on: March 10, 2018, 10:20:49 AM »
Oh that’s interesting.  I had originally assumed the factory oil tank line ports needed to be shut off leaving oil cooler plumbing options at the oil filter only.  Great. ;)

George
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Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #169 on: March 10, 2018, 10:29:44 AM »
Quote from: gschuld on March 10, 2018, 10:20:49 AM
Oh that’s interesting.  I had originally assumed the factory oil tank line ports needed to be shut off leaving oil cooler plumbing options at the oil filter only.  Great. ;)

George

The initial setup has the ports closed.  So leaving cooler plumbing to adaptor behind filter. But I prefer the cooler in the return line and not in the (higher) pressure side. So I suggested this to BJ. But we will start testing without a cooler and go from there.
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Offline Tintop

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #170 on: March 10, 2018, 12:23:04 PM »
Quote from: voxonda on March 10, 2018, 10:29:44 AM
Quote from: gschuld on March 10, 2018, 10:20:49 AM
Oh that’s interesting.  I had originally assumed the factory oil tank line ports needed to be shut off leaving oil cooler plumbing options at the oil filter only.  Great. ;)

George

The initial setup has the ports closed.  So leaving cooler plumbing to adaptor behind filter. But I prefer the cooler in the return line and not in the (higher) pressure side. So I suggested this to BJ. But we will start testing without a cooler and go from there.

Would also be interesting to know if there is any oil pressure drop depending on which ports (front/side) & pressure (high/low side).
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1977 CB550/4 Cafe - Speed Warrior / BOTM 03/11
1980 CB750F (project)
Whittaker GBF Vintage Racing Sidecar (XS750 power) - ITG / 151's / CMR Racing Products (SOLD)
1976 CB400 SS - stock / BOTM 04/11 (SOLD)
1973 CB750 K - basket case (SOLD)
77 CB550 Cafe build
550/750 Filter Thread
Sidecar Rebuild Thread

Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #171 on: March 10, 2018, 01:08:58 PM »
Will record all my findings, Brian. And post them here. First have to open up the engine for an overhaul.
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Offline Tintop

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #172 on: March 11, 2018, 11:51:29 AM »
Quote from: voxonda on March 10, 2018, 01:08:58 PM
Will record all my findings, Brian. And post them here. First have to open up the engine for an overhaul.

Yes, sorry to hear about that little set-back Rob.
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1977 CB550/4 Cafe - Speed Warrior / BOTM 03/11
1980 CB750F (project)
Whittaker GBF Vintage Racing Sidecar (XS750 power) - ITG / 151's / CMR Racing Products (SOLD)
1976 CB400 SS - stock / BOTM 04/11 (SOLD)
1973 CB750 K - basket case (SOLD)
77 CB550 Cafe build
550/750 Filter Thread
Sidecar Rebuild Thread

Offline voxonda

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #173 on: March 13, 2018, 02:50:41 AM »
In the meantime, while waiting for parts, started with constructing a suitable exhaust system. To make life somewhat easier cut up an old four into one which I made years ago using the oem primaries. It is not exactly what I wanted but it will do.
Need to do a little cutting and welding but this it a first step.
 
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Offline gschuld

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Re: CB750 Wet Sump Conversion - Sumpthing
« Reply #174 on: March 13, 2018, 06:31:20 AM »
Rob,

Besides the extra weight of the thicker gauge tubing used in the factory head pipes, it’s hard to argue about the carefully design gentle curvaturecof the shape.  Funny how similar they are in profile to the hand bent 1st generation race pipes.

I’m guessing that you are creating a 4 into 2 into 1 style pipe along the lower right side?  It’s going to be a tight fit while keeping clear of the Sumpthing and keeping it tight enough to avoid the full lean angle grounding concerns.  The only other option it seems is to have the 2 into 1 individually on each side and join together behind the Sumpthing.  I’m guessing that would be too convoluted.  4 individual pipes CR style is the other obvious path. 

If anyone can modify factory header pipes to work, you have my vote.

Watching with interest🧐

George
« Last Edit: March 13, 2018, 06:34:49 AM by gschuld »
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