Re: launch RPM's
[Re: Quicktree]
#1413004
04/01/13 05:14 PM
04/01/13 05:14 PM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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The lowest I can make em hook and be consistent is best in my opinion. When I moved weight forward to settle wheel stands, I had to raise the launch rpm to hit the tires harder and stick them. Still, I am well below full throttle.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: launch RPM's
[Re: Quicktree]
#1413005
04/01/13 05:39 PM
04/01/13 05:39 PM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
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Makes a big difference in RT, especially if you are well below convertor flash. ----- Don't ask me how I know .
Fastest 300
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Re: launch RPM's
[Re: Crizila]
#1413006
04/01/13 05:45 PM
04/01/13 05:45 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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Quote:
Makes a big difference in RT, especially if you are well below convertor flash. ----- Don't ask me how I know .
not in a light car
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Re: launch RPM's
[Re: Crizila]
#1413011
04/02/13 05:43 PM
04/02/13 05:43 PM
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Joined: Apr 2009
Posts: 3,415 Toronto
mshred
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Quote:
Makes a big difference in RT, especially if you are well below convertor flash. ----- Don't ask me how I know .
Leaving at a lower rpm slows down the r/t's?
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Re: launch RPM's
[Re: Triple Threat]
#1413013
04/02/13 06:34 PM
04/02/13 06:34 PM
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Joined: Apr 2009
Posts: 3,415 Toronto
mshred
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Quote:
Quote:
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Makes a big difference in RT, especially if you are well below convertor flash. ----- Don't ask me how I know .
Leaving at a lower rpm slows down the r/t's?
Yes
I guess that makes sense since you would be leaving with less inertia, or in the case of a converter car there is that time it takes for the converter to flash up to the stall rpm?
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Re: launch RPM's
[Re: mshred]
#1413014
04/02/13 06:39 PM
04/02/13 06:39 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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Quote:
Quote:
Quote:
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Makes a big difference in RT, especially if you are well below convertor flash. ----- Don't ask me how I know .
Leaving at a lower rpm slows down the r/t's?
Yes
I guess that makes sense since you would be leaving with less inertia, or in the case of a converter car there is that time it takes for the converter to flash up to the stall rpm?
it would be more pronounced the heavier the car is. have driven heavy cars now in a super light one the difference is huge. my 60' was exactly the same and i seen little change in rt
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Re: launch RPM's
[Re: Quicktree]
#1413015
04/02/13 07:00 PM
04/02/13 07:00 PM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
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My car is a heavy street B-Body. I have found that lowering Launch RPM's slows BOTH my RT and 60'. I think this is unique to the combo, though.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: launch RPM's
[Re: StealthWedge67]
#1413016
04/02/13 07:16 PM
04/02/13 07:16 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
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I have left from an idle up to coming up on the converter to 2500. I like it best coming up on the converter to about 2000 as my heavy B-body seems to like that about the best with my 9.5 Dynamic converter. Ron
Last edited by 383man; 04/02/13 07:17 PM.
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Re: launch RPM's
[Re: Crizila]
#1413020
04/02/13 11:17 PM
04/02/13 11:17 PM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
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Based on those slips and your launch RPM info, you're in the same boat with most of us: RT and 60' slowed dramatically with the lower RPM.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: launch RPM's
[Re: tboomer]
#1413022
04/03/13 09:04 AM
04/03/13 09:04 AM
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Joined: Nov 2009
Posts: 2,177 ill
dennismopar73
top fuel
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Been in heavy cars for some time , The higher RPM seam to slow the heavy car down , Lower RPM seam to make the car faster IDONO?? Now My car is light ,I say light at under 3000#, The 60 does not care if it is 3500 rpm or 2000, only couple # different ,so I leave at 2500, I think a lot has to do with the combo , air in tires, converter, cam, and gearing, Trans brake could make some difference, more so in RT than et? ,
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Re: launch RPM's
[Re: Dodgeguy101]
#1413024
04/03/13 11:02 AM
04/03/13 11:02 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Romeo MI
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Quote:
Must be missing something here, I thought reaction time had to do when the driver let the car move? Cant see what RPM has to do with any of it? Can someone explain please? 60ft time I can see, but not the RT...
Its when the light turned green to when the front tires broke the beams(forward beam)... think of this extreme. if you idle off the line to 5000 rpm off the line.. which will move past the beam first
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Re: launch RPM's
[Re: dennismopar73]
#1413025
04/03/13 11:06 AM
04/03/13 11:06 AM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
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I guess there are a lot of factors involved here ( not to mention the human factor ). Next time I go out, I will go back to my "normal" launch procedures ( tires at 12 psi and launch at 2700rpm ) and see if my RT's return to - acceptable .
Fastest 300
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Re: launch RPM's
[Re: MR_P_BODY]
#1413026
04/03/13 11:20 AM
04/03/13 11:20 AM
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Joined: Mar 2010
Posts: 632 MD-USA
Dodgeguy101
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Quote:
Quote:
Must be missing something here, I thought reaction time had to do when the driver let the car move? Cant see what RPM has to do with any of it? Can someone explain please? 60ft time I can see, but not the RT...
Its when the light turned green to when the front tires broke the beams(forward beam)... think of this extreme. if you idle off the line to 5000 rpm off the line.. which will move past the beam first
Ok, makes sense, thanks
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Re: launch RPM's
[Re: Dodgeguy101]
#1413027
04/03/13 11:35 AM
04/03/13 11:35 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Quote:
Quote:
Quote:
Must be missing something here, I thought reaction time had to do when the driver let the car move? Cant see what RPM has to do with any of it? Can someone explain please? 60ft time I can see, but not the RT...
Its when the light turned green to when the front tires broke the beams(forward beam)... think of this extreme. if you idle off the line to 5000 rpm off the line.. which will move past the beam first
Ok, makes sense, thanks
The closer you can get to the max torque of the engine the quicker it will move the mass
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