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Calling 2+2gt/distributor Curve

  • Thread starter Thread starter horseballz
  • Start date Start date Aug 3, 2012

horseballz

10 Year Member
Sep 30, 2009
824
19
49
Las Vegas, NV
Aug 3, 2012
#1
  • Aug 3, 2012
  • #1
2+2GT,
Last fall we were having a discussion concerning distributor timing curves in this thread:

http://www.stangnet.com/mustang-forums/threads/2-2gt-distributor-curve-questions.848318/

You gave some great advice, but never actually answered my last set of questions. Life sidetracked me and I am just now getting back to this issue. Please elaborate, if you would, for me. If the specs shown for a BOSS 302 are at distributor RPM and the degrees are camshaft degrees, it seems that if I'm checking/setting my curve with a timing light (with advance functions) both the RPM and degrees of advance should be doubled? If that is the case total/maximum advance (in crankshaft degrees) should be 17-22 at 4000 RPM, 14 1/2-20 at 3000, 5-9 1/2 at 2000, 0-3 1/2 at 1500 and 0-1 degrees at 1000. Is this correct?
Thank You,
Gene
 

horseballz

10 Year Member
Sep 30, 2009
824
19
49
Las Vegas, NV
Aug 3, 2012
#2
  • Aug 3, 2012
  • #2
???
Crickets Chirping
???
If 2+2GT doesn't reply, anyone else have any comments/suggestions?
Thanx,
Gene
 
2

2+2GT

10 Year Member
Apr 25, 2009
3,333
10
79
Southeastern Pennsylvania
Aug 3, 2012
#3
  • Aug 3, 2012
  • #3
The specifications are intended to be used in a distributor machine. I have never tried to compare/transpose them to in-car adjustment. Now you've got me curious.
 

horseballz

10 Year Member
Sep 30, 2009
824
19
49
Las Vegas, NV
Aug 3, 2012
#4
  • Aug 3, 2012
  • #4
The specifications are intended to be used in a distributor machine. I have never tried to compare/transpose them to in-car adjustment. Now you've got me curious.
Click to expand...

Me too, that's why I'm asking. It just makes sense, when you figure that distributor rpm is 1/2 of crank rpm and camshaft degrees are 1/2 of crankshaft. It just seems that 4000 rpm is a bit high for an engine to reach "all-in"timing advance.
Thanks,
Gene
 

BuckeyeDemon

Member
Apr 13, 2010
130
9
19
Cincinnati, OH
Aug 3, 2012
#5
  • Aug 3, 2012
  • #5
i believe you have it right. the factory was probably really conservative with the timing just to make sure the cars didn't ping. so Ford was probably compromising a bit of power.
 
Reactions: MustangDiva
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MustangDiva

New Member
Aug 3, 2012
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Aug 3, 2012
#6
  • Aug 3, 2012
  • #6
Hmmm!
 

PoppyMod

Member
Jun 27, 2010
617
6
19
Severna Park, MD
Aug 4, 2012
#7
  • Aug 4, 2012
  • #7
horseballz said:
Me too, that's why I'm asking. It just makes sense, when you figure that distributor rpm is 1/2 of crank rpm and camshaft degrees are 1/2 of crankshaft. It just seems that 4000 rpm is a bit high for an engine to reach "all-in"timing advance.
Thanks,
Gene
Click to expand...

Hi, Forget about deciphering the numbers, as was mentioned, those are based on factory settings as interpreted by a distributor machine's analysis. What are you trying to achieve? Looking for a performance curve or stock curve? A performance curve, would get all of your advance (total) in early (2500-3000 Rs) much of this depends on the cam's designed power band. Simply stated.
 
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