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-   -   11.55 @ 118.9, New PB (https://www.challengertalk.com/forums/f100/11-55-118-9-new-pb-663975/)

Rob446 11-12-2018 05:05 AM

11.55 @ 118.9, New PB
 
1 Attachment(s)
Dr. Carl sure is an inspiration, or maybe he just plain made my Scat Pack jealous because it ran like never before Saturday at Atlanta Dragway. Weather was great, approx. 300 DA, temp in the low 50's and a 10 mph headwind. The track was well prepped for a Wally race.

I had been running 18 - 19 PSI in the 305/45-18 MT Street R's but bumped them up 20 20.5 for this run based on the discussion in Carl's PB thread and saw a significant increase in MPH. No wheel spin at launch but log showed very small amount of spin at 2 and 3 shift. This was the first time using 90 octane pure gas bumped to 99 octane with TORCO. Saw 1 spike of 1.5* KR right after 4 to 5 shift, about normal for this car.

On previous logs I frequently saw a flat spot in RPM at about 3100 RPM in 1st gear. Sean gave me another race tune that increased idle rpm to 850 and shut off traction control (I was unaware TC could be turned of with the tuner and had been turning it off manually). I launched from idle on this run where previously I had been attempting to launch at 1800 (which resulted in actual launch anywhere from 1500 to 2200).

Just don't look at RT. We had a sleeping contest, fortunately the guy in the Mustang in the right lane won that. Unfortunately I only got 1 run Saturday. Rumor around Atlanta Dragway was Nuke posted new info on the Meat Thermometer Mod and I wanted to get home to see what that was all about or maybe it was to go to neighbors wedding. That was a couple of days ago, cant remember.

Solidman 11-12-2018 06:27 AM

Dang Booooyyyy!! CONGRATS!!! YA'LL bad! Excellent post!

EricG 11-12-2018 07:41 AM

Great run, man the car is getting after it! Did you mess any more with coolant or air intake readings - or observe them for this pass? Any differences?

Rob446 11-13-2018 05:16 AM

Quote:

Originally Posted by EricG (Post 8398761)
Great run, man the car is getting after it! Did you mess any more with coolant or air intake readings - or observe them for this pass? Any differences?

Ambient was 53.6. IAT was 106 at launch, dropped to 97 at 1st shift, 82 at 2nd shift, 70 at 3rd shift, and 66at 4th shift. My car has the shaker and the Mopar cold air inlet (rubber tube from headlight to air box). Between the 2 it appears to cool IAT rapidly with the car in motion. ECT was 182 at launch rose to 195 at finish line then quickly returned to 185. Launch ECT was about 3* lower than normal but after launch the ECT curve looks similar to most runs.

The air was best I have seen this year, the only negative was approximately 10 MPH headwind. Even though ECT was only 3* cooler than normal at launch there wa probably a larger differential of engine temperature when compared to most runs but I have no way of knowing and its not something I can control anyway.

Solidman 11-13-2018 05:44 AM

Now THAT"S attention to detail!! DANG!

Rob446 11-13-2018 04:09 PM

Quote:

Originally Posted by Solidman (Post 8399223)
Now THAT"S attention to detail!! DANG!

Well, its all there in the data log if I remember to push the data log button. Now if I only knew what to do with all that info.

moparjim71 11-13-2018 07:28 PM

Nice run, congrats!

Fawls 11-13-2018 10:43 PM

Guy in the Mustang will be pleased getting all the way up to 24 mph in 1/4 mile!

Rob446 11-14-2018 04:32 PM

Quote:

Originally Posted by Fawls (Post 8399649)
Guy in the Mustang will be pleased getting all the way up to 24 mph in 1/4 mile!

24.13 to be precise:smile:. The Mustangs 1000 foot was quicker than mine but he was in my blind spot the entire run. Can't understand how either of those numbers happened. Just a tricky Mustang.

cdahl383 05-03-2019 10:11 AM

Looks like I missed this post. Congrats man! 11.50's is moving! Bet you were happy with that pass!

I actually run my car with 22psi in the rear now. It hooks up well and is more stable at the end of the track. My other buddy runs 24psi and still hooks. This is with the ET Street R 305 tire on 17" wheels.

Glad your car is running good. I had Jay adjust a few things on my tune, the 1-2 shift was so violent and fast that it would always spin the tires. The new revised trans tune is much better, still an aggressive shift but not as violent and no tire spin. The rest of the shifts are just as hard as before. Seemed to work well on my car.

You want to see 0 ST KR, but spikes at shift points are somewhat normal, as long as it falls off. If you see 1.0-2.0 staying there and lingering as you go down the track, you need to either up the octane a couple points or pull a degree of timing.

Glad your car is running well and some of that advice actually helped you out. You'll be on your way to the 11.30's and 11.40's soon!


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