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Re: What Alternator??
[Re: Hyper Henry]
#1318611
10/10/12 11:26 PM
10/10/12 11:26 PM
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Joined: Jul 2004
Posts: 19,318
State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
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I run a Kragens 60 amp toyota 4-runner unit and w/elec water pump, fuel pump and fan I have zero charging troubles.....
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: What Alternator??
[Re: Hyper Henry]
#1318612
10/10/12 11:58 PM
10/10/12 11:58 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I run a 85A Denso and never charged the battery in years... make sure you run large enough wire so you dont get line drop(wasting power)... I'm running the same alt on my street rod... I dont like the single wire alts with a built in reg... I prefer the external reg so I can replace the reg if the reg goes bad 
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Re: What Alternator??
[Re: MR_P_BODY]
#1318613
10/11/12 12:20 AM
10/11/12 12:20 AM
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Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
jamesc
master
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master
Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
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i haven't done any testing for this particular situation BUT. depending on the regulator setting on the single wire alternators they may not charge as much as they should. the reason being that the regulator can only sense what's at the output of the alternator so it can't compensate for line losses and loads. most "proper" charging systems have a remote regulator sense wire that is connected at some distance from the alternator such as a buss point so it can maintain the voltage required at that point. the voltage read at the alternator is going to be the highest reading but in reality you want the regulator controlling the field in response to the lower voltage found further out in the system. i have used and still have a single wire on the sig car but imho it isn't really the best way to do it. there was a website with a better explanation than these but i can't find it, however look at these (especially the second one) and you should get a better idea of what i'm trying to convey doesn't matter what brand alternator the theory is the same. personally i think the denso units are probably the best choice http://www.madelectrical.com/electricaltech/remotevoltagesensing.shtmlhttp://bob_skelly.home.comcast.net/~bob_skelly/alternator_conversion/wiring_alternator1.html
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Re: What Alternator??
[Re: 383man]
#1318615
10/11/12 11:03 AM
10/11/12 11:03 AM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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He has electic water pump, electic fan , electric fuel pump and a 7 MSD that likes lots of voltage. he has a deep cycle battery also.
Them 7 MSD's are hungrey heffers when it comes to power.
Derrick I run number #4 wire alt back to the trunk with my 120 amp denso (from mancini)
I forgot to ask saturday you got lots of grounds.
I have a # 10 ground wire that goes motor to ground sliced off and goes back to the battery and is again sliced to the body I beleive this is a good thing. + a number 4 battery to body ground strap motor to body + the motor plate will provide ground.
Never too many grounds
Last edited by Dodgem; 10/11/12 11:10 AM.
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Re: What Alternator??
[Re: Dodgem]
#1318616
10/11/12 11:09 AM
10/11/12 11:09 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
He has electic water pump, electic fan , electric fuel pump and a 7 MSD that likes lots of voltage. he has a deep cycle battery also.
Them 7 MSD's are hungrey heffers when it comes to power.
Derrick I run number #4 wire alt back to the trunk with my 120 amp denso (from mancini)
Thats why he should run a external reg... tap the
sense wire into the biggest draw item in the car to
get the highest voltage to the battery
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Re: What Alternator??
[Re: MR_P_BODY]
#1318617
10/11/12 11:15 AM
10/11/12 11:15 AM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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Quote:
Quote:
He has electic water pump, electic fan , electric fuel pump and a 7 MSD that likes lots of voltage. he has a deep cycle battery also.
Them 7 MSD's are hungrey heffers when it comes to power.
Derrick I run number #4 wire alt back to the trunk with my 120 amp denso (from mancini)
Thats why he should run a external reg... tap the
sense wire into the biggest draw item in the car to
get the highest voltage to the battery
yea I'm trying to get him to go with a three wire Derrick don't like wireing but a few minutes and i'll have a regulator taking it's reading under the dash wired in. I belive in a reg getting it's voltage signal up front not at the back of the alt.
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Re: What Alternator??
[Re: Hyper Henry]
#1318619
10/11/12 05:37 PM
10/11/12 05:37 PM
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Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581
master
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master
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
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I've been using a 100amp Tuff Stuff Alternator with a 4 ga cable to the cutoff switch. No problems.
Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
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Re: What Alternator??
[Re: Chris2581]
#1318620
10/11/12 05:50 PM
10/11/12 05:50 PM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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Quote:
I've been using a 100amp Tuff Stuff Alternator with a 4 ga cable to the cutoff switch. No problems.
I just put one in and it kicks a$$. 1100 RPM and 14.5VDC with the electric fan and headlights on. It was purchased at Summit Racing.
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Re: What Alternator??
[Re: Jeremiah]
#1318621
10/11/12 07:29 PM
10/11/12 07:29 PM
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Joined: Dec 2007
Posts: 345
Ontario, Canada
Hyper Henry
OP
enthusiast
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OP
enthusiast
Joined: Dec 2007
Posts: 345
Ontario, Canada
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My buddy Dodgem is correct I am running electric fuel pump, electric water pump, electric 16" fan as a puller, Moroso 30% reduction crank pulley, MSD 7AL2 ignition box and also run head lights and tail lights when night racing. Not sure on the make of electric fan but has a good sized motor on it and it will drop my idle down when it engages  I just checked wire guage going back to battery and it's only an #8. Could this and the reduction crank pulley be the majority of my problem  Derrick
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Re: What Alternator??
[Re: Hyper Henry]
#1318622
10/11/12 07:42 PM
10/11/12 07:42 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
My buddy Dodgem is correct
I am running electric fuel pump, electric water pump, electric 16" fan as a puller, Moroso 30% reduction crank pulley, MSD 7AL2 ignition box and also run head lights and tail lights when night racing. Not sure on the make of electric fan but has a good sized motor on it and it will drop my idle down when it engages I just checked wire guage going back to battery and it's only an #8.
Could this and the reduction crank pulley be the majority of my problem
Derrick
Yep... I dont mind over killing the charge lead a bit
just to eliminate the line drop... so it weighs a
pound more... big deal... if you run the reg sense
wire to tee in at a heavy load point it will tell
the alt , we need MORE power... on my 85a Denso I'm
getting 14.9 volts at the battery at 1600 and up,
its 14.5 volts at idle... with the fan and water
pump running and of course the 7AL-2
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Re: What Alternator??
[Re: MR_P_BODY]
#1318623
10/11/12 11:13 PM
10/11/12 11:13 PM
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Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
Eric
top fuel
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top fuel
Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
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Mr P where did you get and which brand is the one you have?....thanks
5.53 @ 125 1/8th on the launch control..more left in her!
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Re: What Alternator??
[Re: Scamp408]
#1318625
10/12/12 07:23 AM
10/12/12 07:23 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Hey Mr P with that alt does your idle drop when your fan comes on? I have the 90 amp denso from a 90s van she charges great but when my spal fan comes on my idle drops like 200rpms.
No mine doesnt drop... but if you have a big draw item
such as your fan you will see some rpm drop when it
engages.... the alt is going from 10 amp(we will say)
to 50 amps.. thats gonna pull down the engine...
I know my buddies truck will drop when his fan kicks
in, it draws 40 amps on high... lets face it, as
your idling in gear at about 800 rpm your only making
about 30 hp so if the alt loads down it might take
5 hp which is a pretty good bit of what the engine
is making(power wise)
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Re: What Alternator??
[Re: Eric]
#1318626
10/12/12 07:36 AM
10/12/12 07:36 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Mr P where did you get and which brand is the one you have?....thanks
Eric its a Mopar production alt off of one of the
early 90s models... its a Denso that uses a external reg
You can see it here sorta... I did make the pulley,
it normally has a serpentine pulley
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Re: What Alternator??
[Re: MR_P_BODY]
#1318627
10/12/12 08:52 AM
10/12/12 08:52 AM
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Joined: Jan 2003
Posts: 8,028
Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,028
Tulsa OK
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I am running a GM CS130 alternator that I believe is 105amps. It works great, couldn't be happier. With a 5" crank pulley at a 1000rpm idle it charges at 14.3 with the headlights, fuel pump, water pump, fan, and msd running.
Another thing I like about is thats its nothing special or unique. It fits a ton of different GM cars so I can easily get another at the parts store if needed.
68 Barracuda Formula S 340
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