Portatree Set up for S/G or S?ST

reknapp52 · 01-25-2022, 11:30 AM

Quote:

Originally Posted by Tom Goldman

All NHRA events are either a .370 or .470 tree so always start there for your baseline. you can always add additional delay for independent races that might utilize a ,400 or .500 tree .
If you already have a base delay for your car you can start with that and adjust the rollout to bring your reaction times into the area of your average RT'S on the track .
Typical roll numbers can be between .220 and .260 depending on class ,horsepower ,chassis setup, and launch rpm.
My own car has a rollout of around .230 . and I typically need between .030 .040 delay.
Once you have a data base of actual track runs to compare to practice tree runs you can fine tune the roll settings .
If you are using it with the full size tree , Allison Doll recently posted about the Portatree ,or any practice tree , that you should try to position the tree to be as far away as the actual track tree to get a more realistic reaction to the lights.

I think in D5 the quick tree is only at National Events, the standard .400 and .500 tree is still used at Divisional and Regional? Can anyone confirm?

Lenny5160 · 01-25-2022, 12:51 PM

Quote:

Originally Posted by reknapp52

I think in D5 the quick tree is only at National Events, the standard .400 and .500 tree is still used at Divisional and Regional? Can anyone confirm?

I typically only run one national event per year, but I use the same general delay that I use at divisionals. Pretty sure it's always .370 in SG/SC.

TCHilton · 01-25-2022, 02:21 PM

Quote:

Originally Posted by reknapp52

I think in D5 the quick tree is only at National Events, the standard .400 and .500 tree is still used at Divisional and Regional? Can anyone confirm?

This is not correct. Each track is set to the same ".370/.470" standard, with the exception of Denver which has an additional .1 autostart delay built in due to the altitude.

Travis

reknapp52 · 01-25-2022, 10:30 PM

Wow, thanks guys--that explains some problems that I've been having and trying to blame on my transmission.

Keith 944 · 01-26-2022, 08:31 AM

Keep in mind rollout at different tracks, tree positions etc all can have an effect on r/t

TCHilton · 02-10-2022, 11:29 AM

Update for thread from NHRA yesterday

NHRA Announces Change to Super Category LED Compensation

https://www.nhraracer.com/content/ge...436&zoneid=175

01-25-2022, 10:30 PM	#4
reknapp52 Junior Member Join Date: Nov 2008 Location: Cascade, CO Posts: 48 Likes: 22 Liked 7 Times in 5 Posts	Re: Portatree Set up for S/G or S?ST Wow, thanks guys--that explains some problems that I've been having and trying to blame on my transmission.

01-26-2022, 08:31 AM	#5
Keith 944 VIP Member Join Date: Feb 2006 Location: Dela-where? Posts: 2,195 Likes: 1,163 Liked 1,885 Times in 578 Posts	Re: Portatree Set up for S/G or S?ST Keep in mind rollout at different tracks, tree positions etc all can have an effect on r/t __________________ KEITH MAYERS 2-1/2 X somebody Still many X nobody

02-10-2022, 11:29 AM	#6
TCHilton Junior Member Join Date: Oct 2017 Location: Eau Claire, WI Posts: 15 Likes: 4 Liked 47 Times in 8 Posts	Re: Portatree Set up for S/G or S?ST Update for thread from NHRA yesterday NHRA Announces Change to Super Category LED Compensation https://www.nhraracer.com/content/ge...436&zoneid=175 __________________ Travis Hilton travis.hilton@rockfallsraceway.com