A little drag racing tip for you STS guys with EFILive or HPT
09-30-2006, 03:48 PM
#1
A little drag racing tip for you STS guys with EFILive or HPT
Ok, so we all know how the STS builds boost faster when all the exhaust pipes and turbo housing are good and hot. So I decided to try something last night. A couple of minutes before it was my turn to go in the staging lanes, I used the bidirectional controls to command 11:1 fuel and 6* of timing while just sitting there (swich it back before I made a ran). It runs really rough , but it's dumping some REALLY hot exhaust gases in to the pipes heating them up quickly. Help me launch at 3300rpm (on a 22-2400 rpm DACCO remain TB stall) and 8 psi of boost, which netted me a 1.88 60' time 
09-30-2006, 04:46 PM
#3
TECH Senior Member
iTrader: (10)
Join Date: Oct 2004
Location: Crystal Springs, MS
Posts: 14,068
Likes: 0
Received 2 Likes
on
2 Posts
That sound pretty cool!
How did you figure out about the AFR and *6 of timing?
i can never keep this right but is 11:1 rich or lean?
Since 14.7:1 is the ideal AFR, shouldnt 11:1 be lean? that would be 11parts of air to 1 part of fuel? less air?
How did you figure out about the AFR and *6 of timing?
i can never keep this right but is 11:1 rich or lean?
Since 14.7:1 is the ideal AFR, shouldnt 11:1 be lean? that would be 11parts of air to 1 part of fuel? less air?
09-30-2006, 05:10 PM
#4
Originally Posted by nonnieselman
That sound pretty cool!
How did you figure out about the AFR and *6 of timing?
i can never keep this right but is 11:1 rich or lean?
Since 14.7:1 is the ideal AFR, shouldnt 11:1 be lean? that would be 11parts of air to 1 part of fuel? less air?
How did you figure out about the AFR and *6 of timing?
i can never keep this right but is 11:1 rich or lean?
Since 14.7:1 is the ideal AFR, shouldnt 11:1 be lean? that would be 11parts of air to 1 part of fuel? less air?
I just took a stab at the numbers, but It seems to work. 11:1 is rich. Less air= more fuel= rich
09-30-2006, 05:13 PM
#5
Originally Posted by TURBO8
Very nice, I sit in the staging lanes, building boost with the two step. I build about 5 psi and let off. I do this twice and then run. The people around me look at me like I am crazy. My blow off sounds like a drowning rooster. LOL
09-30-2006, 05:41 PM
#6
Next time out try -5* and maybe 10.5:1 or even 10:1
The old covair set used to wire up switches to "bog" the timing to heat everything up and build boost. A lot of 'em even launched that way and then threw the switch off as soon as they were spooled up. I've been trying to figure out a one switch deal with the truck, but can only come up with mangling a valet mode tune.
The old covair set used to wire up switches to "bog" the timing to heat everything up and build boost. A lot of 'em even launched that way and then threw the switch off as soon as they were spooled up. I've been trying to figure out a one switch deal with the truck, but can only come up with mangling a valet mode tune.
10-01-2006, 11:09 PM
#7
Staging Lane
Join Date: Sep 2004
Location: S.E. Michigan
Posts: 66
Likes: 0
Received 0 Likes
on
0 Posts
1.88 60ft is that good for your truck? I have been looking at switching over to turbo set up, but that seems a little bit weak on the 60ft.?We cut low 1.83's, and a best of 1.79 with a p1sc making 4 psi out of the gate? I'm not trying to be a dick, just asking.
Trending Topics
10-01-2006, 11:18 PM
#8
Originally Posted by J dubb
1.88 60ft is that good for your truck? I have been looking at switching over to turbo set up, but that seems a little bit weak on the 60ft.?We cut low 1.83's, and a best of 1.79 with a p1sc making 4 psi out of the gate? I'm not trying to be a dick, just asking.
I have a 5500lbs truck and only a 293ci motor, I would say it pretty good. That's a lot of weight to get rollin with a little *** motor.