settin cruise rpm

pro318 · 05-17-2011, 05:33 PM

Hi guys, I just switched from a inline stop, to a under carb #1 plate stop{air}. Was wondering if there is a way to set the cruise rpm without a bunch of track time. Thanks for any info.

Clint Rigby · 05-17-2011, 05:58 PM

You have to engage the throttle stop. Depending on what throttle stop timer you have you can do this in the box or you may have to switch the airlines at the stop. To check the RPM put in 1st gear hit transbrake and deck it (just like on starting line). Then make your adjustments and repeat. **Make sure trans is in first during this procedure**
Hope this helps

pro318 · 05-17-2011, 09:23 PM

yes this helps. thanks for the info.

C and W Racing · 05-18-2011, 08:35 AM

Just be aware that the rpm that you set in the pits, depending on your combo, will be 100 to 150 rpm's higher when going down the track
Chuck

Gerber3533 · 05-18-2011, 10:08 AM

If you're using a Mega 450, by any chance... All you have to do is hold down the "0" on the number pad, until the "ON" and "OFF" on the screen switch places... And then just do the rest like Clint said... Put it in 1st, hold the transbrake, and put it to the wood... Just make sure you don't let go of the button, or just keep your foot on the brake for reassurance...

Chuck - we check ours each morning and it has honestly never changed from checking it in the pits to going down the track... Unless the air drastically changes or something, then it might.

Clint Rigby · 05-19-2011, 12:02 AM

I agree! I record each run and have never seen mine change from the pits to the track. Now mine used to climb rpms on the stop, shifting on timer cured that.

S/C 302A · 05-24-2011, 07:13 PM

With my new engine / convertor combo i found mine is 300 rpm lower on the track. Set it @ 4600 in pits equals 4300 on track according to my Mega 450 playback. I don't know why i have to cheat it like that, but works.

hookdaddy · 05-24-2011, 09:11 PM

If you use a launch chip - take it out while setting. especailly if the cruse is high than the launch.
You can disconnect the air lines and have someone manually adjust the cruise while your holding the brake and the pedal down.

hookdaddy · 07-06-2011, 11:45 PM

Quote:

Originally Posted by S/C 302A

With my new engine / convertor combo i found mine is 300 rpm lower on the track. Set it @ 4600 in pits equals 4300 on track according to my Mega 450 playback. I don't know why i have to cheat it like that, but works.

After seeing your post Dave I checked ours using our data logger and we see the same 300 rpm. - Thanks for the tip.

05-17-2011, 05:58 PM	#2
Clint Rigby Junior Member Join Date: Apr 2010 Posts: 42 Likes: 6 Liked 156 Times in 6 Posts	Re: settin cruise rpm You have to engage the throttle stop. Depending on what throttle stop timer you have you can do this in the box or you may have to switch the airlines at the stop. To check the RPM put in 1st gear hit transbrake and deck it (just like on starting line). Then make your adjustments and repeat. Make sure trans is in first during this procedure Hope this helps Last edited by Clint Rigby; 05-17-2011 at 06:00 PM.

05-17-2011, 09:23 PM	#3
pro318 Junior Member Join Date: Feb 2010 Posts: 20 Likes: 0 Liked 0 Times in 0 Posts	Re: settin cruise rpm yes this helps. thanks for the info.

05-18-2011, 08:35 AM	#4
C and W Racing Senior Member Join Date: Jul 2007 Posts: 554 Likes: 5 Liked 10 Times in 1 Post	Re: settin cruise rpm Just be aware that the rpm that you set in the pits, depending on your combo, will be 100 to 150 rpm's higher when going down the track Chuck

05-18-2011, 10:08 AM	#5
Gerber3533 Junior Member Join Date: Jul 2004 Location: Ohio Posts: 31 Likes: 0 Liked 0 Times in 0 Posts	Re: settin cruise rpm If you're using a Mega 450, by any chance... All you have to do is hold down the "0" on the number pad, until the "ON" and "OFF" on the screen switch places... And then just do the rest like Clint said... Put it in 1st, hold the transbrake, and put it to the wood... Just make sure you don't let go of the button, or just keep your foot on the brake for reassurance... Chuck - we check ours each morning and it has honestly never changed from checking it in the pits to going down the track... Unless the air drastically changes or something, then it might. __________________ S/C 3275 S/G 3533

05-19-2011, 12:02 AM	#6
Clint Rigby Junior Member Join Date: Apr 2010 Posts: 42 Likes: 6 Liked 156 Times in 6 Posts	Re: settin cruise rpm I agree! I record each run and have never seen mine change from the pits to the track. Now mine used to climb rpms on the stop, shifting on timer cured that.

05-17-2011, 05:33 PM	#1
pro318 Junior Member Join Date: Feb 2010 Posts: 20 Likes: 0 Liked 0 Times in 0 Posts	settin cruise rpm Hi guys, I just switched from a inline stop, to a under carb #1 plate stop{air}. Was wondering if there is a way to set the cruise rpm without a bunch of track time. Thanks for any info.

05-24-2011, 07:13 PM	#7
S/C 302A Junior Member Join Date: Oct 2009 Location: Diamond, Illinois Posts: 20 Likes: 0 Liked 0 Times in 0 Posts	Re: settin cruise rpm With my new engine / convertor combo i found mine is 300 rpm lower on the track. Set it @ 4600 in pits equals 4300 on track according to my Mega 450 playback. I don't know why i have to cheat it like that, but works. __________________ Dave Livesey 2007 Midwest Super Comp Series Champ

05-24-2011, 09:11 PM	#8
hookdaddy Member Join Date: Jun 2007 Location: Ocala Florida Posts: 254 Likes: 0 Liked 8 Times in 3 Posts	Re: settin cruise rpm If you use a launch chip - take it out while setting. especailly if the cruse is high than the launch. You can disconnect the air lines and have someone manually adjust the cruise while your holding the brake and the pedal down. __________________ Don Scholl d.scholl@comcast.net 145Y Stock - 145H Super Comp