Slant Six Forum :: bellhousing adapter discussion, yet again...

I've already passed the AREngineering files to someone else and they are all theirs to do with as needed, they had been setup by Andy's CNC guy here in town to do the one run.

The problem is the cost of the small run, you will be paying out about $4000 to do 10, over the last 2 years I've only had 4 requests to do this so that leaves the speculator out a fair amount of money to do the run. Also it's a large chunk of aluminum to do it so that's a larger part of the cost. The average ballpark market number for the requests was about $250 shipped...

You can drill the adaptor for the pilot bushing, or you can have it machined solid like the dakota style pilot bushings are installed in their cranks (need a late crank to make it work).

FYI.

-D.Idiot

So, do you still have the files?

The crank adapter was steel, not aluminum, right?

Quote:

So, do you still have the files?

The crank adapter was steel, not aluminum, right?

No, I sold them to another board member that was interested in making a run so he has the disc, files, and the printouts including the hardware sets for mounting them.

The original crank adaptor was steel and round like the crank end, the AR piece was aluminum and hexagonal.

-D.Idiot

Also it's a large chunk of aluminum to do it so that's a larger part of the cost.

Someone made an earlier post about making these a few months back, and someone that was knowledgeable with this swap said the SBM bellhousing was not a very good candidate for this for the Slant because it had too many bolt holes that overlapped on the 2 bolt patterns. They felt the BBM was a better choice.

They felt the BBM was a better choice.

Quote:

They felt the BBM was a better choice.

One of the driving reasons for this is the fact that many slant six D-150's (and earlier D-100's) came with the 11" clutch and flywheel already to use (clutch cross references to the same one a 383 uses), so pretty easy pickins in the junkyards for trucks for 25 years in finding trucks with NP435's)... The SBM bell will not contain that size of flywheel, so that limits the end user of a SBM bell to use a SBM flywheel with one hole egged out to fit our crank.... The bad and the sad though is finding a BBM bellhousing since mopar stopped using big blocks after the 1978 model year in most platforms...this leaves junkyards full of SBM bells and transmissions...

The arguement could go back and forth but as it would sit, BBM would be best for race (allowing for using clutches that will take the abuse and have a bigger contact patch on the wheel, and not having derated clutches that don't hold up well) and SBM would be easier to find junkyard stuff for street use.

-D.Idiot

Just passing on what was posted here by hyper_pak. Don't know if its different than what your wanting to do or not.
http://www.slantsix.org/forum/viewtopic.php?t=51144

Author:	65CrewCabPW [ Mon Mar 25, 2013 10:43 am ]
Post subject:	bellhousing adapter discussion, yet again...
So, I have been thinking about what it would take to get another production run of slant to sbmopar bellhousing adapters. I've found the mechanical drawings and dimensions for the bolt patterns, and I was wondering if anyone had a drawing of an adapter itself, or a CAD or DXF or anything else, that one could submit for an estimate to one of those "small run" CNC shops that build small runs, for an estimate. Most of these are for automatics, but it would be nice to make the crank adapter capable of holding common pilot bushings/bearings. This kind of stuff gets cheaper all the time, as the systems get more and more automated and require less labor. I have a local machine shop I'd check with first, as they do this kind of stuff, as well. So, does anyone have this stuff? Thanks

Author:	DusterIdiot [ Mon Mar 25, 2013 11:01 am ]
Post subject:	Nope...
I've already passed the AREngineering files to someone else and they are all theirs to do with as needed, they had been setup by Andy's CNC guy here in town to do the one run. The problem is the cost of the small run, you will be paying out about $4000 to do 10, over the last 2 years I've only had 4 requests to do this so that leaves the speculator out a fair amount of money to do the run. Also it's a large chunk of aluminum to do it so that's a larger part of the cost. The average ballpark market number for the requests was about $250 shipped... You can drill the adaptor for the pilot bushing, or you can have it machined solid like the dakota style pilot bushings are installed in their cranks (need a late crank to make it work). FYI. -D.Idiot

Author:	65CrewCabPW [ Mon Mar 25, 2013 11:42 am ]
Post subject:	Re: Nope...
Quote: I've already passed the AREngineering files to someone else and they are all theirs to do with as needed, they had been setup by Andy's CNC guy here in town to do the one run. The problem is the cost of the small run, you will be paying out about $4000 to do 10, over the last 2 years I've only had 4 requests to do this so that leaves the speculator out a fair amount of money to do the run. Also it's a large chunk of aluminum to do it so that's a larger part of the cost. The average ballpark market number for the requests was about $250 shipped... You can drill the adaptor for the pilot bushing, or you can have it machined solid like the dakota style pilot bushings are installed in their cranks (need a late crank to make it work). FYI. -D.Idiot So, do you still have the files? The crank adapter was steel, not aluminum, right?

Author:	DusterIdiot [ Mon Mar 25, 2013 11:54 am ]
Post subject:	No...
Quote: So, do you still have the files? The crank adapter was steel, not aluminum, right? No, I sold them to another board member that was interested in making a run so he has the disc, files, and the printouts including the hardware sets for mounting them. The original crank adaptor was steel and round like the crank end, the AR piece was aluminum and hexagonal. -D.Idiot

Author:	65CrewCabPW [ Mon Mar 25, 2013 1:42 pm ]
Post subject:	Re: No...
Quote: Quote: So, do you still have the files? The crank adapter was steel, not aluminum, right? No, I sold them to another board member that was interested in making a run so he has the disc, files, and the printouts including the hardware sets for mounting them. The original crank adaptor was steel and round like the crank end, the AR piece was aluminum and hexagonal. -D.Idiot I see. Anyone else got any ideas? I'm not trying to make money here, I just want one, and there's none around here. If I knew how, I'd just do it myself from the drawings. But I have no familiarity with how any of it works.

Slant Six Forum https://slantsix.org/forum/

bellhousing adapter discussion, yet again... https://slantsix.org/forum/viewtopic.php?t=51514	Page 1 of 2

Author:	olafla [ Mon Mar 25, 2013 4:58 pm ]
Post subject:
Quote: Also it's a large chunk of aluminum to do it so that's a larger part of the cost. I have never seen a SL6 adapter, so pardon me if this question seem overly stupid. Is there any possibility to cut cost by making a two-piece adapter? I think high-performance street use, not regular race use. There is of course always a load to consider, but I have never seen damage in the fastener area of an automatic, unless it has come from a blown converter or other rotating parts inside the bellhousing. Here are the measurments for the engine/bellhousing: bellhousing_measurments.jpg Olaf

Author:	65 dartman [ Mon Mar 25, 2013 5:15 pm ]
Post subject:
I traded some HD torsions bars to a another member for the slant to SBM adapter. See this thread from FABO for some commentary and pictures: http://tinyurl.com/d5lqks6

Author:	CNC-Dude [ Mon Mar 25, 2013 7:15 pm ]
Post subject:
Someone made an earlier post about making these a few months back, and someone that was knowledgeable with this swap said the SBM bellhousing was not a very good candidate for this for the Slant because it had too many bolt holes that overlapped on the 2 bolt patterns. They felt the BBM was a better choice.

Author:	65CrewCabPW [ Mon Mar 25, 2013 7:38 pm ]
Post subject:
Quote: Someone made an earlier post about making these a few months back, and someone that was knowledgeable with this swap said the SBM bellhousing was not a very good candidate for this for the Slant because it had too many bolt holes that overlapped on the 2 bolt patterns. They felt the BBM was a better choice. There's no overlap. The SBM pattern is about 1 -1.5 inches larger diameter, and the bolt holes don't line up, period. Look at the pictures in the link above... It shows clearly there's no problem. Anyway, it's my take, that I'd want it from 3/8 - 1/2 steel plate, which, even if carved from one piece, is not all that much in metal cost and keep it from growing the length much. The biggest cost appears to be the time required to make the CNC setup. It would just need some grade 8 shallow head bolts ( cap screws countersunk a bit would work) to the engine, and some improvement in thickness for the bellhousing bolts or backed with nuts, and that should do the trick.

Author:	65CrewCabPW [ Mon Mar 25, 2013 8:00 pm ]
Post subject:
Quote: Someone made an earlier post about making these a few months back, and someone that was knowledgeable with this swap said the SBM bellhousing was not a very good candidate for this for the Slant because it had too many bolt holes that overlapped on the 2 bolt patterns. They felt the BBM was a better choice. Oh, as far as the BBM, there's almost no reason to do the swap, as the transmission limitations - what's available for the BBM, is far too limited - more limited than the slant six now.

Author:	DusterIdiot [ Mon Mar 25, 2013 8:02 pm ]
Post subject:	Because...
Quote: They felt the BBM was a better choice. One of the driving reasons for this is the fact that many slant six D-150's (and earlier D-100's) came with the 11" clutch and flywheel already to use (clutch cross references to the same one a 383 uses), so pretty easy pickins in the junkyards for trucks for 25 years in finding trucks with NP435's)... The SBM bell will not contain that size of flywheel, so that limits the end user of a SBM bell to use a SBM flywheel with one hole egged out to fit our crank.... The bad and the sad though is finding a BBM bellhousing since mopar stopped using big blocks after the 1978 model year in most platforms...this leaves junkyards full of SBM bells and transmissions... The arguement could go back and forth but as it would sit, BBM would be best for race (allowing for using clutches that will take the abuse and have a bigger contact patch on the wheel, and not having derated clutches that don't hold up well) and SBM would be easier to find junkyard stuff for street use. -D.Idiot

Author:	65CrewCabPW [ Mon Mar 25, 2013 8:15 pm ]
Post subject:	Re: Because...
Quote: Quote: They felt the BBM was a better choice. One of the driving reasons for this is the fact that many slant six D-150's (and earlier D-100's) came with the 11" clutch and flywheel already to use (clutch cross references to the same one a 383 uses), so pretty easy pickins in the junkyards for trucks for 25 years in finding trucks with NP435's)... The SBM bell will not contain that size of flywheel, so that limits the end user of a SBM bell to use a SBM flywheel with one hole egged out to fit our crank.... The bad and the sad though is finding a BBM bellhousing since mopar stopped using big blocks after the 1978 model year in most platforms...this leaves junkyards full of SBM bells and transmissions... The arguement could go back and forth but as it would sit, BBM would be best for race (allowing for using clutches that will take the abuse and have a bigger contact patch on the wheel, and not having derated clutches that don't hold up well) and SBM would be easier to find junkyard stuff for street use. -D.Idiot I also have the drawings and dimensions for the BBM. If I knew how to make the file in the first place, I could make a SL6 to BBM and SL6 to SBM file. Even a SBM to BBM.

Author:	CNC-Dude [ Mon Mar 25, 2013 10:03 pm ]
Post subject:
Just passing on what was posted here by hyper_pak. Don't know if its different than what your wanting to do or not. http://www.slantsix.org/forum/viewtopic.php?t=51144

Author:	65CrewCabPW [ Mon Mar 25, 2013 10:14 pm ]
Post subject:
Quote: Just passing on what was posted here by hyper_pak. Don't know if its different than what your wanting to do or not. http://www.slantsix.org/forum/viewtopic.php?t=51144 totally different idea. The bellhousing he's attempting to adapt is a different concept from what I want to do. I just want a plate that goes between the motor and the production bellhousing, which has a different design than the lakewood or quick time.

Author:	wvenable [ Tue Mar 26, 2013 12:58 pm ]
Post subject:
Yes, but the homework is done. These are ready to produce. Two of them are ready to inspect when I head over next week. Produced for a Lakewood - prolly easy to adapt to a QuickTime. Bottem line is I won't ever have to think about my feet. This will need some work because the Lakewood bell moves the starter to the low position. Anyway good luck with your adapter. Should be posting pics of my progress next week.

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