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DRR Trophy
posted
totally re did my dragster over the winter and having a slow start with msd grid. i know it has to spin at 900 rpm to fire. new starter on a remote ford solenoid, new master disconnect switch new battery odyssey 1200 mjt, new cable hot and ground, grounds all filed down to bare metal for good contact, engine block grounded to chassis, battery to chassis. the only thin that i have noticed out of ordinary is my delay box when i cut off master power power slowly bleeds off. PLEASE HELP!!!!!


Rodney Byrd
 
Posts: 6 | Location: Roll Tide Roll | Registered: February 18, 2009Reply With QuoteReport This Post
DRR Pro
Picture of rusty
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some switch panels have a voltage drop feeding ign .may require a dedicated relay circuit


opinions are worth what you pay for them
1.036, 6.16@ 224

 
Posts: 1235 | Location: texas | Registered: February 17, 2006Reply With QuoteReport This Post
DRR Top Comp
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Do you still have the old starter?


.
Dave



F J B

Wake me when it's over
 
Posts: 4062 | Location: Earth | Registered: February 08, 2006Reply With QuoteReport This Post
DRR Elite
Picture of 1320racer
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whose starter and what size cable?


O'IT!

Offering 1st hand experience and advice based on 3 decades of on track proven performance

"if you guys are so broke dyck you can't buy USA made parts you need to stay the fuc at home that's the bottomline" ----Tim McAmis



 
Posts: 12069 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Pro
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quote:
Originally posted by Total Chaos:
totally re did my dragster over the winter and having a slow start with msd grid. i know it has to spin at 900 rpm to fire.


I don’t think my sbc with the spark plugs removed would crank half that fast.

What do you mean by slow start ??? Are you saying it cranks slow ???

If your MSD ignition +12v main feed connection is not coming directly from the battery or battery master disconnect, imho it is not wired properly.

The reason you wire this way is that the ignition has the maximum amount of voltage available when cranking the engine.
 
Posts: 2001 | Location: 53056 | Registered: December 30, 2009Reply With QuoteReport This Post
DRR All Star
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Even efi doesn't need 900 rpm to start. I don't think starting speed is the issue.


Foxtrot Juliet Bravo
 
Posts: 5964 | Location: Illinois | Registered: July 08, 2004Reply With QuoteReport This Post
DRR Trophy
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battery cable new 1.0 gauge
new starter CSR (big)new in the trailer (2 y years) old starter CRS (big) on motor new (2 years) I don't know if i mentioned all aluminum BBC Huntsville Engine 588 engine block grounded to chassis


Rodney Byrd
 
Posts: 6 | Location: Roll Tide Roll | Registered: February 18, 2009Reply With QuoteReport This Post



DRR Elite
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starter is JUNK! Sell it and buy a Tilton Severe Duty and it will spin like the plugs are out.


O'IT!

Offering 1st hand experience and advice based on 3 decades of on track proven performance

"if you guys are so broke dyck you can't buy USA made parts you need to stay the fuc at home that's the bottomline" ----Tim McAmis



 
Posts: 12069 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Sportsman
Picture of Hammons Motorsports
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Is the cable "battery" cable....

If so, welding cable is a much better option...

More strand surface moves more amperage...

We use #2 welding cable for all battery feeds and grounds, starter cables, etc....

Never an issue.


Bill Hammons
Hammons Motorsports

Old age and treachery, if we only knew then what we know today.....

95 Spitzer, 1.041 60 ft, 4.76 @ 142.85, 1740 lbs, 421" SBC

10/9/2016: 1.049 60 ft, 4.721@143.80 at 1780 lbs.

4/15/2017: 1.017 60 ft, pedaled 4.742@134 at 1780 lbs.
 
Posts: 943 | Location: Georgetown, KY | Registered: May 29, 2001Reply With QuoteReport This Post
DRR Sportsman
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are you giving it full timing at the start? IE are you at 32 degrees at 0 rpm, because if you ramp your timing in, let's say 15 degrees at 0 and 32 at 750 rpm. the engine will spin a lot quicker.

that being said, it still should start and I would be doing a voltage drop test to find the problem.

Joe


Without data, you’re just another guy with an opinion.
 
Posts: 1261 | Location: TEXAS | Registered: February 07, 2003Reply With QuoteReport This Post
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