Motor plate with alternator
#3189889
11/09/23 05:30 PM
11/09/23 05:30 PM
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Joined: Oct 2011
Posts: 179
Norfolk, NE
Racer33
OP
member
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OP
member
Joined: Oct 2011
Posts: 179
Norfolk, NE
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I'm in the process of building my first car with a motor plate. I want to run an alternator as the car will see some street use. What are you using for an alternator and mount? Was looking at the AR engineering setup but it looks like the Doty crank pulley recommended is no longer available.
Last edited by Racer33; 11/09/23 05:32 PM.
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Re: Motor plate with alternator
[Re: dvw]
#3189958
11/09/23 10:07 PM
11/09/23 10:07 PM
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Joined: Jan 2004
Posts: 4,566
Motor City
6PKRTSE
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master
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Posts: 4,566
Motor City
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Pulleys are pretty easy make. A decent sized alternator case is deeper than the front surface of the motor plate. I'm assuming a big block. That being said you'll have 3 choices. Mount the alternator below the plate. Cut a good sized hole in the plate for case clearance. Or mount it to the k frame. It can be forward or backward makes no difference. It's easier to mount on the passenger side do to the oil pump. If you are using a crank trigger and or vacuum pump all needs to be sorted out at the same time.
Doug Pretty much exactly how I mounted all of my accessories. Made most of my own FEAD.
Last edited by 6PKRTSE; 11/10/23 01:29 PM.
1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
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Re: Motor plate with alternator
[Re: dvw]
#3189970
11/09/23 11:10 PM
11/09/23 11:10 PM
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Joined: Jan 2003
Posts: 4,270
Morrow, OH
markz528
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master
Joined: Jan 2003
Posts: 4,270
Morrow, OH
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Pulleys are pretty easy make. A decent sized alternator case is deeper than the front surface of the motor plate. I'm assuming a big block. That being said you'll have 3 choices. Mount the alternator below the plate. Cut a good sized hole in the plate for case clearance. Or mount it to the k frame. It can be forward or backward makes no difference. It's easier to mount on the passenger side do to the oil pump. If you are using a crank trigger and or vacuum pump all needs to be sorted out at the same time.
Doug Totally agree. And I made my own pulleys. Setup is just a little different now because has a bigger alt.
67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......
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Re: Motor plate with alternator
[Re: Racer33]
#3190009
11/10/23 08:49 AM
11/10/23 08:49 AM
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Joined: Sep 2021
Posts: 20
SWFL
Tie Rod Garage
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member
Joined: Sep 2021
Posts: 20
SWFL
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I'm in the process of building my first car with a motor plate. I want to run an alternator as the car will see some street use. What are you using for an alternator and mount? Was looking at the AR engineering setup but it looks like the Doty crank pulley recommended is no longer available. I have several NOS Doty crank pulleys holding down a shelf. What one are you looking for ?
1941 Dodge WC, 493 cid twin turbo FAST XFI
2002 Dakota R/T RC
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Re: Motor plate with alternator
[Re: Tie Rod Garage]
#3190011
11/10/23 08:54 AM
11/10/23 08:54 AM
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Joined: Jan 2011
Posts: 674
st.louis,mo.
dart games
mopar
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mopar
Joined: Jan 2011
Posts: 674
st.louis,mo.
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doty makes this set up which i got a few years ago.dont know if they make it anymore,ar engineering has mounts too
Last edited by dart games; 11/10/23 08:55 AM.
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Re: Motor plate with alternator
[Re: dart games]
#3190054
11/10/23 01:27 PM
11/10/23 01:27 PM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
super stock
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super stock
Joined: May 2005
Posts: 1,030
ohio
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Another option which I did on my old car, grab the Chevy bracket that mounts to the side on the block where the fuelpump attaches and use a turnbuckle to the framerail for tension
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Motor plate with alternator
[Re: 67mprfan]
#3190104
11/10/23 05:25 PM
11/10/23 05:25 PM
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Joined: May 2009
Posts: 511
Temperance, MI
68 HEMI GTS
mopar
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mopar
Joined: May 2009
Posts: 511
Temperance, MI
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I used Andy’s alt mount with a 90 dodge truck alternator. Welded a tab to the frame rail for the tensioner. Looks like doty still has pullys on their website. ?
68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780#
69 Roadrunner 511 six pack 10.92 drive to track street car
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Re: Motor plate with alternator
[Re: Racer33]
#3190146
11/10/23 09:16 PM
11/10/23 09:16 PM
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Joined: Jan 2003
Posts: 31,023
Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,023
Oregon
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I'm in the process of building my first car with a motor plate. I want to run an alternator as the car will see some street use. What are you using for an alternator and mount? Was looking at the AR engineering setup but it looks like the Doty crank pulley recommended is no longer available. I have a Doty pulley if you still need one. I have a bunch of this stuff that I was going to put up for sale but haven't gotten around to it yet. Shoot me a PM if you want it. I can also sell you the AR Engineering parts at the same time if you want.
Last edited by AndyF; 11/10/23 09:18 PM.
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Re: Motor plate with alternator
[Re: moparx]
#3190353
11/12/23 12:21 AM
11/12/23 12:21 AM
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Joined: Mar 2006
Posts: 9,835
MI, usa
dvw
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master
Joined: Mar 2006
Posts: 9,835
MI, usa
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how many amps is the alternator you have now ? what size are you going to ?  70 amp Denso mini. But the output is very low at idle (35 amp). Going to a Denso 118mm 150 amp that will put out 60 at idle. Doug
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Re: Motor plate with alternator
[Re: dvw]
#3190407
11/12/23 11:40 AM
11/12/23 11:40 AM
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Joined: Jan 2004
Posts: 4,566
Motor City
6PKRTSE
master
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master
Joined: Jan 2004
Posts: 4,566
Motor City
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Mine is a East Coast 150 Amp and does just fine even on street all day with dual 2000 cfm (4000 cfm) fans, an Aeromotive 3000 fuel pump, and all lights on at night.
1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
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Re: Motor plate with alternator
[Re: dvw]
#3190428
11/12/23 12:50 PM
11/12/23 12:50 PM
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Joined: Jan 2003
Posts: 4,270
Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,270
Morrow, OH
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how many amps is the alternator you have now ? what size are you going to ? 70 amp Denso mini. But the output is very low at idle (35 amp). Going to a Denso 118mm 150 amp that will put out 60 at idle. Doug I used a 55 amp East Coast alt for years. Finally saw the light and put a 120 amp East Coast alt in. What a difference! In summer heat car ran 20 degrees cooler when back to the pits because the pump and fan spun that much faster. Affinity laws at work........
67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......
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