Dragstrip results of fans (& other!)

[the head]

Well I tried a few things while at the track. Of course, the fans were in. I also put in a set of NGK Iridium plugs that are one range colder to help with the nitrous. Then I also made a duct for the Volant (a total of $9) as the pics will show.

Well, the results were weird. First run was a 14.67, which ties my best time ever on just motor. But then it started slowing down as the night wore on. Next passes were in the 14.7 range and then I tried the scoop and got no gains. I ran one pass on the nitrous and ran a 14.0 which was showing something was up. MPH was down as well on the nitrous. So I thought the plugs might have been messing things up and they did look on the lean side when I pulled them. I went back with the stock heat range platinum plugs and proceeded to run about the same (14.7). So it wasn't the plugs. So I pulled the scoop and just ran it with the fans being the only difference from last time and ran another 14.7 and then a 14.80 flat. But as the night wore on, the mph was steadily dropping. The fans were doing their job and the radiator was never hot enough that I couldn't lay my hand on the cores/fins. My last run of the night was on the gas and still only netted a 13.98.

My thinking is that weather was having some kind of effect. We had a cold front blow through yesterday so humidity isn't bad but temps were about 10 degrees hotter than my last trip out there. What's weird is that my motor runs were about what I normally run but the nitrous runs were about 0.3 secs slower than normal. I have made no changes to the nitrous set up so that was pretty strange.

I'll look at some stuff and will be back out there Sunday since there are several other trucks that are going to be there (Chevy and Dodge) so we'll see how it goes. I suppose I could brag about pummeling this Quad Cab Hemi but he appeared to be stock so it wasn't very fair (even though I did not spray him). One of those Colorado trucks was there (std cab) and he was running 15.5s with an air filter and muffler. There was also a Mecedes SL600 V12 out there and we watched him beat a lightning with a full roll cage. I ran him on my first run and he let out at the 1/8 mile and still put a pretty good whoppin' on me. Judging from the lightning runs, that thing was in the 11s because the lightning was an 11 second truck (I went and talked to the guy). So that was pretty cool seeing an exoti-car out there running.

The scoop is merely a 3" dryer hose coupled to a 6" vent-hat for a water heater. My results: my scoop didn't help or hurt any. But if it's running lean, it may not be able to compensate with more fuel with the other mods already on it.

[fellowx]

How do you launch the truck? Do you use the power braking method or just the floor on the go?

NE Ways, Good Times, really good runs.

[Squid]

Wish I was there. Sounds like a blast.

[the head]

I stall it to about 2000 rpm and then mash it to the floor.

I got some feedback on another forum (lstech.com) and the guys that were there last night were also .2-.3 secs off. So I think under better conditions that I would have been turning 14.4-14.5s with the fan mod.

[GETSOMZ28]

What was the DA that night compared to your last time out?

[the head]

DA?

[GETSOMZ28]

Density Altitude. This shows the effects of altitude on the performance of naturally aspirated motors.

http://members.cox.net/bobcosby/stang/altitude.html