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Re: 12V.... 16V... 18V.... 24V [Re: gregsdart] #1387411
02/17/13 12:25 AM
02/17/13 12:25 AM
Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
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jamesc Offline
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jamesc  Offline
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communist bloc of new jersey
i'd like to do a real life test but haven't been able to get a fluke 289 (logging multimeter) at a price i'm willing to spend. iirc the crane ignition tester i have will drive an ignition to over 19k if the ignition will go that far. iirc no ignition i've tested pulled more than 8 amps with most being in the 7 amp range. of all the ignitions i've tested the crane HI-8 was the meanest but i've never tested anything like the MSD-8. i don't think any MSD 7 i've tested pulled anywhere near the 12 amps they claim at 12k RPM but there are a lot of variables

Re: 12V.... 16V... 18V.... 24V [Re: jamesc] #1387412
02/17/13 12:43 AM
02/17/13 12:43 AM
Joined: Feb 2005
Posts: 20,174
PA.
pittsburghracer Online work
"Little"John
pittsburghracer  Online Work
"Little"John

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Posts: 20,174
PA.
As Mopar guys do we are really over-thinking this guys. Do you know how many guys have Racepaks in their cars so they can download the info after a pass and really breakdown what exactly is going on during a pass.


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: 12V.... 16V... 18V.... 24V [Re: pittsburghracer] #1387413
02/17/13 01:03 AM
02/17/13 01:03 AM
Joined: Jan 2003
Posts: 6,314
The Swamp
MegaDart Offline
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MegaDart  Offline
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The Swamp
why do you "need" an alternator?
When I switched over I sold my Optima redtop and East Coast alternator to a local racer and offset my cost...

Re: 12V.... 16V... 18V.... 24V [Re: pittsburghracer] #1387414
02/17/13 12:16 PM
02/17/13 12:16 PM
Joined: Jan 2003
Posts: 9,999
Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline
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gregsdart  Offline
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Frostbitefalls MN (Rocky&Bullw...
Quote:

As Mopar guys do we are really over-thinking this guys. Do you know how many guys have Racepaks in their cars so they can download the info after a pass and really breakdown what exactly is going on during a pass.



For me, because I don't have a race pack, or expensive gauges. So my only way to come up with the right system is to do just that. Now I also understand why the 16v system came about. A heavy battery draw during a run with a ton of accessory's running on a twelve volt system will cause so much voltage drop with a car size battery that it won't keep the voltage up where it needs to be for enough time. Plus you can only use about 50 percent of the full charge, but a 16 v will deliver about 75 to 80 percent before it gives up. So pound for pound, the 16v is the winner for a no alternator setup. For me though, with a low draw and the fact that I can go enough rounds with a single 12v, that is the cheap route for me.
The one question I have though, is how much extra wattage do the accessories draw due to the higher voltage? That may even up the playing field just a bit. With the added speed of the starter, waterpump, fans etc, that extra speed is not free.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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