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Thread: Auxiliary Shaft/Intermediate Shaft Question

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    ...on your color TV screen... Turbo Mopar Contributor Reeves's Avatar
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    Auxiliary Shaft/Intermediate Shaft Question

    On the auxiliary shaft or intermediate shaft as most call it (the shaft that drives the oil pump from the timing belt) there is extra material just behind the big end race. It kinda looks like a very sharp cam lobe. I don't have a block sitting here at my desk, but I do have the shaft. Is this there for a reason? Is it an oil slinger of some sort?

    I'm not talking about the fuel pump eccentric BTW.

    Ideas?

    I'm getting ready to machine the entire shaft smooth for less weight and possibly better balancing and I plan to get rid of this extra bump, unless it's needed for something.

    James Reeves - Reeves Racing
    83 Scamp summer driver - future DC motor receiver
    86 GLH-T 9.99 at 143.78 mph - Iceman CAI and Borla catback
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    88 Shelby Z 13.5 - been in storage for 7+ years
    89 Dodge Caravan PLH - currently blown piston
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    07 Charger 5.7L 12.99 Dad's(Mom driving)

  2. #2
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    I thought it might have been for some type of balancing purpose...or counter balace for the matter.

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    Re: Auxiliary Shaft/Intermediate Shaft Question

    drives the mechanical fuel pump on a carbed car?

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    Re: Auxiliary Shaft/Intermediate Shaft Question

    oh whoops, guess I should of read the whole post. Pic James?

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    Re: Auxiliary Shaft/Intermediate Shaft Question

    I thought it was intended to counterbalance the fuel pump lobe. Of course, the CB shafts don't have the FP lobe, so it actually imbalances them...
    https://db.tt/SV7ONZpQ
    Rob Lloyd
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    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    I think it serves the same purpose as that small piece bolted to the upper motor mount on the SRT-4's.
    Mike Marra
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    I thought it was the fuel pump eccentric, but just not finished machined.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
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    ...on your color TV screen... Turbo Mopar Contributor Reeves's Avatar
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    Quote Originally Posted by turbovanman View Post
    I thought it was the fuel pump eccentric, but just not finished machined.
    It's not the fuel pump eccentric. That's located further away from the race. On CB blocks, the fuel pump eccentric base circle is still there, just the lobe was missing.

    I'll get a pic.

    It might serve the same purpose as the foam in a 2.2/2.5 passenger side mount.

    James Reeves - Reeves Racing
    83 Scamp summer driver - future DC motor receiver
    86 GLH-T 9.99 at 143.78 mph - Iceman CAI and Borla catback
    86 GLHS #169 Mom's - complete Super 60 car
    87 Shelby Z 14.16 Dad's - mostly stock, no sh*t!
    88 Shelby Z 13.5 - been in storage for 7+ years
    89 Dodge Caravan PLH - currently blown piston
    03 SRT-4 12.24 Mom's
    07 Charger 5.7L 12.99 Dad's(Mom driving)

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    Re: Auxiliary Shaft/Intermediate Shaft Question

    I noticed KPI removed them when they lightened theirs back in the day. The one they ended up with was 16oz lighter than a stocker. Final weight was 1.5 lbs. Add an aluminum pulley and that would be a nice weight reduction.
    Todd

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    Re: Auxiliary Shaft/Intermediate Shaft Question

    any dimensions on how thin they made it? The Aluminum pulley for the intermediate shaft should be here monday and It'd be cake walk to throw the I-shaft in a lathe here at work and machine it down. Wonder if I should just wack it all the way off since it might not be driving anything. hmmm the possiblities.

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    Re: Auxiliary Shaft/Intermediate Shaft Question

    Quote Originally Posted by GLHNSLHT2 View Post
    any dimensions on how thin they made it? The Aluminum pulley for the intermediate shaft should be here monday and It'd be cake walk to throw the I-shaft in a lathe here at work and machine it down. Wonder if I should just wack it all the way off since it might not be driving anything. hmmm the possiblities.
    Where are you getting an aluminum pulley?

    I had a spare adj. cam pulley that I thought of using there, but a aluminum version of the stocker with maybe some more lightening holes would be trick..

    Also, what do you mean by not driving anything? You got external oil pump and distributor or DIS?

    James Reeves - Reeves Racing
    83 Scamp summer driver - future DC motor receiver
    86 GLH-T 9.99 at 143.78 mph - Iceman CAI and Borla catback
    86 GLHS #169 Mom's - complete Super 60 car
    87 Shelby Z 14.16 Dad's - mostly stock, no sh*t!
    88 Shelby Z 13.5 - been in storage for 7+ years
    89 Dodge Caravan PLH - currently blown piston
    03 SRT-4 12.24 Mom's
    07 Charger 5.7L 12.99 Dad's(Mom driving)

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    Re: Auxiliary Shaft/Intermediate Shaft Question

    Quote Originally Posted by Reeves View Post

    Also, what do you mean by not driving anything? You got external oil pump and distributor or DIS?

    He mean's the eccentric.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

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  13. #13
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    Quote Originally Posted by GLHNSLHT2 View Post
    any dimensions on how thin they made it? The Aluminum pulley for the intermediate shaft should be here monday and It'd be cake walk to throw the I-shaft in a lathe here at work and machine it down. Wonder if I should just wack it all the way off since it might not be driving anything. hmmm the possiblities.
    No dimensions were given but they did say they rifle barrel drilled one and that one proved to be not reliable for their application. I would leave the radius on the machined ends alone and just concentrate on the shaft if you were to chuck it up in a lathe. There are photos of the ones they modified. If you use an adjustable pulley, I would find a way to lock it in place (making it non-adjustable) so it can't alter crank timing on you if it loosens up. I would just tig weld it. That would suck chasing your tail trying to find performance gremlins and have it come down to that.
    I just looked at several aux. shafts and camshafts I have. Some have that cast boss, while others don't?
    Todd
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    Visit www.boostbutton.com... Turbo Mopar Contributor ShelGame's Avatar
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    What magazine/issue did that come from?
    https://db.tt/SV7ONZpQ
    Rob Lloyd
    '89 Daytona C/S

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    Re: Auxiliary Shaft/Intermediate Shaft Question

    Quote Originally Posted by Reeves View Post
    Where are you getting an aluminum pulley?

    I had a spare adj. cam pulley that I thought of using there, but a aluminum version of the stocker with maybe some more lightening holes would be trick..

    Also, what do you mean by not driving anything? You got external oil pump and distributor or DIS?
    Just a Findanza 8v pulley. Not driving anything as in no oil pump or distrib. I'm planning on going dry sump and possibly megash1t and run Neon coil packs or see if I can get a COP setup to work. If I can't I might just run a dummy oil pump. Who knows. I like how the Wraith car uses that hole to run the dry sump oiling into the block area. Don't have it all worked out yet, just idea's running through my mind and collecting parts. I have the shortblock and the cylinder head should be back soon. Need to figure out what I'm going to do for a head to turbo setup, and a turbo as well.

    Quote Originally Posted by turbovanman View Post
    He mean's the eccentric.
    Simon, don't try to guess what I mean I mean wack the hole shaft off and see if I can just run the small 2" part or so behind the retainer with a gear on the end. Probably wouldn't work all that great and put a lot of stress on the bearing right there but man it would be a lot lighter

    Quote Originally Posted by 4 l-bodies View Post
    No dimensions were given but they did say they rifle barrel drilled one and that one proved to be not reliable for their application. I would leave the radius on the machined ends alone and just concentrate on the shaft if you were to chuck it up in a lathe. There are photos of the ones they modified. If you use an adjustable pulley, I would find a way to lock it in place (making it non-adjustable) so it can't alter crank timing on you if it loosens up. I would just tig weld it. That would suck chasing your tail trying to find performance gremlins and have it come down to that.
    I just looked at several aux. shafts and camshafts I have. Some have that cast boss, while others don't?
    Todd
    Thanks for the pic Todd.

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    ...on your color TV screen... Turbo Mopar Contributor Reeves's Avatar
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    Quote Originally Posted by 4 l-bodies View Post
    No dimensions were given but they did say they rifle barrel drilled one and that one proved to be not reliable for their application. I would leave the radius on the machined ends alone and just concentrate on the shaft if you were to chuck it up in a lathe. There are photos of the ones they modified. If you use an adjustable pulley, I would find a way to lock it in place (making it non-adjustable) so it can't alter crank timing on you if it loosens up. I would just tig weld it. That would suck chasing your tail trying to find performance gremlins and have it come down to that.
    I just looked at several aux. shafts and camshafts I have. Some have that cast boss, while others don't?
    Todd
    Wow...very cool article.

    I love finding out that stuff was done way back in the day, and I'm just now thinking about it on my own. LOL.

    What magazine is that?

    I'll turn one down next week and see how it goes. I wonder how big they rifle drilled it? Maybe a smaller drill would work better? Maybe just leave that alone....

    James Reeves - Reeves Racing
    83 Scamp summer driver - future DC motor receiver
    86 GLH-T 9.99 at 143.78 mph - Iceman CAI and Borla catback
    86 GLHS #169 Mom's - complete Super 60 car
    87 Shelby Z 14.16 Dad's - mostly stock, no sh*t!
    88 Shelby Z 13.5 - been in storage for 7+ years
    89 Dodge Caravan PLH - currently blown piston
    03 SRT-4 12.24 Mom's
    07 Charger 5.7L 12.99 Dad's(Mom driving)

  17. #17
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    Quote Originally Posted by Reeves View Post
    Wow...very cool article.

    I love finding out that stuff was done way back in the day, and I'm just now thinking about it on my own. LOL.

    What magazine is that?

    I'll turn one down next week and see how it goes. I wonder how big they rifle drilled it? Maybe a smaller drill would work better? Maybe just leave that alone....
    Peterson Publication #5084-8 184 pages on nothing but 2.2 FWD Mopars. It is a must read for the seriously inflicted 2.2 guy. Complete engine buildup, history, SCCA, Front Runner (PPG) section, transaxle, suspension, NHRA, salt flats, and even a bit on the AWD daytona with HH head, lots of wild one off stuff...
    I'm guessing it came out in the 85-86 era. I see these come up on ebay once in a while.
    Todd
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  18. #18
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    Quote Originally Posted by 4 l-bodies View Post
    I noticed KPI removed them when they lightened theirs back in the day. The one they ended up with was 16oz lighter than a stocker. Final weight was 1.5 lbs. Add an aluminum pulley and that would be a nice weight reduction.
    Todd
    Quote Originally Posted by GLHNSLHT2 View Post
    any dimensions on how thin they made it? The Aluminum pulley for the intermediate shaft should be here monday and It'd be cake walk to throw the I-shaft in a lathe here at work and machine it down. Wonder if I should just wack it all the way off since it might not be driving anything. hmmm the possiblities.
    Update.
    I acquired a new, never used intermediate shaft for a carb'd 2.2L. Weight stock is 2lbs 9.25 oz. Lots of room for improvement!

    http://tinyurl.com/25uwrbn

    and

    http://tinyurl.com/27wcorq
    Last edited by Reeves; 07-13-2010 at 09:10 AM.

    James Reeves - Reeves Racing
    83 Scamp summer driver - future DC motor receiver
    86 GLH-T 9.99 at 143.78 mph - Iceman CAI and Borla catback
    86 GLHS #169 Mom's - complete Super 60 car
    87 Shelby Z 14.16 Dad's - mostly stock, no sh*t!
    88 Shelby Z 13.5 - been in storage for 7+ years
    89 Dodge Caravan PLH - currently blown piston
    03 SRT-4 12.24 Mom's
    07 Charger 5.7L 12.99 Dad's(Mom driving)

  19. #19
    Supporting Member II Turbo Mopar Contributor Nemesismachine's Avatar
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    That magazine needs to be .pdf'd.

  20. #20
    Supporting Member II Turbo Mopar Contributor Shadow's Avatar
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    Re: Auxiliary Shaft/Intermediate Shaft Question

    Quote Originally Posted by 4 l-bodies View Post
    Peterson Publication #5084-8 184 pages on nothing but 2.2 FWD Mopars. It is a must read for the seriously inflicted 2.2 guy. Complete engine buildup, history, SCCA, Front Runner (PPG) section, transaxle, suspension, NHRA, salt flats, and even a bit on the AWD daytona with HH head, lots of wild one off stuff...
    I'm guessing it came out in the 85-86 era. I see these come up on ebay once in a while.
    Todd
    Too funny! I just read this and didn't look at when it was posted. Went straight to ebay and you guessed it, found this exact mag for sale! Very cool, can't wait to read through it! Thanks for the tip!

    Robert Mclellan
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