Hey Guys. Went to the drags today and remembered to turn off the AC before my runs.
1.91 60ft
12.5 ET
113 MPH
Slips to come...

 

Good job. That is almost a full second faster then I ran today and I have nearly the same mods as you.

Here is what I ran today:

First run results:

R/T .473
60' 2.339
330 6.102
1/8 9.18
MPH 82.79
1000 11.77
1/4 13.912
MPH 106.32

Second run results:

R/T .491
60' 2.151
330 5.773
1/8 8.738
MPH 85.88
1000 11.308
1/4 13.419
MPH 107.44

Man, I suck at drag racing.

 

just work on launching better. if you guys were cuttin 1.7 60' times like some guys on here, you both be running low low low 12's all day

 

HKS Downpipe
Perrin Cat Delete Pipe
HKS Carbon Ti Catback
Unorthodox Pulley Kit
HKS 272/272 Cams
HKS Cam Gears
Apexi S-AFC II

RUN 1
R/T = .218
60' = 1.784
330' = 5.200
1/8 = 8.053
MPH = 85.74
1000 = 10.513
1/4 = 12.575
MPH = 109.51

RUN 2
R/T = .033
60' = 1.726
330' = 5.107
1/8 = 7.926
MPH = 87.55
1000 = 10.371
1/4 = 12.404
MPH = 111.00

 

Smog, I guess you went to Carlsbad today. 12.5 is what I feel my car is capable of w/o me driving. I know low 12s is your goal and it is very possible with a trap speed of 113mph. Are you coming out to Fontucky on the 10th of April. BTW How's the clutch holding up with all that power.JJoo8, I know your pain as I made an *** out of myself on my last three runs at Fontucky. 2.3,2.4 and 2.6 60s don't equate to good ets. Also what were the conditions and what kinda gas were you running. 1+ on 91 = capable mid to high 12s depending on driver of course. I would guess you were on 91 octane or running into a head wind like I was when I trapped 107-108. I suck but i can only get better and if I get 12.6 or better the cat delete pipe will be my next modification for the track.

 

Slip (I'm car 55):

 

This run (my first) would have been my best but the track was so rough that I mistook all the pebbles and debris hitting my undercarriage for pinging and thought something was wrong with my car. I ran a 1.79 60ft but let off the gas momentarily towards the end of third gear to figure out what all the noise was. That track is REALLY rough. Here is that slip:

 

Smogrunner,

Congrats on your runs!! Good times.

Comparing your 330 times your 1st run could easily have been a 12.3-12.4 if you didn't let off.

What was the weather like?? Are you still on your stock clutch??

Did you have your car tuned after RRE did your cams??


Your twin in Nor Cali




Tom

 

This was my first time at the track so I can not comment on the conditions of it. It was sunny and about 72. I was running race gas on my stage 1+, but one of my biggest problems was hitting the rev limiter. I did it twice on the first run and once on the second.

 

Just found the site Nice run

Now to just finish up my car and get it back on the track with you.

 

Smog, have you ever run on the other side of that track? The reason I ask is because your 1/8th traps are still **really** low and it looks like you're picking up close to 30mph on the back half, which should be impossible. I think you'd trap 90mph if you ran on the other side of that track.. Or maybe your 1320 traps would drop a little. Anyway, try it for me next time, please. Mathematically, I've never seen someone back half from 85-113mph before. Its kind of nuts. Since the 1320 trip light averages your speed over the last 66 feet of the run (so you are really traceling faster than 113mph when you hit the trip light), you should've been decently beyond the indicated redline on the tach in 4th. Is this correct or did you go to 5th?

 

Tom-

What was your 1/8th mile trap from that 12.4@111mph run?

 

The trap speeds are really just timed for 66 ft. A slower 60 time is going to put you at a different rpm range going thru the traps, which means that you might be pulling much harder at that point then you would at a much higher rpm where the power drops off and the mph starts to stall. This is why his slow 60 times have a much higher trap speeds at the 1/8th and 1/4 mile. They can also change when you over rev and over run a gear, which also causes the mph to stall instead of rising like it should if you were to change gears.

I know I am not known here, but maybe with more then 1.5 years of running at a drag strip every single weekend (including carlsbad, pomona, rialto, qualcom, palmdale and CA speedway) with more then 3000 runs down the track in my Audi A4 can back it up.

 

Being new to a forum doesn't mean you're new to cars, and I can appreciate that fact. While I've not made 3000 runs, I have been drag racing for several years (although not too much anymore) and know how the timing system works.

My problem isn't with the 60', its with how the 1/8th mile trap speed is VERY LOW for the time and the 1/4 trap speed is just a bit high. The 60' can explain the 1320 trap, but the 660 is simply too low, and I think the track's speed sensor at the 660' (1/8th mile) mark is miscalibrated.

For example, I ran 86.3mph in the 1/8th with a 1.88 (almost identical to Smog's) 60 foot in my Evo awhile back when it was a lot weaker than it is now. However, my 1320 trap was 107mph. On a car that is a mid-high 12 second car, you can expect a 20-22mph increase on average from the 1/8th to the 1/4, but Smog's car is picking up 30mph on some runs!!!

When you look at the slips in correlation, its pretty obvious that the 1/8th mile trap speeds are reading lower than his car is actually traveling.

Show me any other Evo at any other track in the country that runs mid 12s (assuming less than 2.1 second 60 foot times) that can pick up !!30mph!! on the back half of the track. On Smog's best run, I'd bet he's trapping a lot closer to 90mph in the 1/8th mile.

Understand my point? I think the 660' speed sensor is reading too low.

 

FWIW, with an 2.2X sec 60' time, our Stg 2 car trapped at 95mph in the 1/8th and trapped the 1/4 at 123mph, held back by the 4th gear limiter. Probably could have done 125-126 with better gearing.

During the second attempt, I managed a less miserable 1.9X 60" time, a 98mph 1/8th trap and still another rev limited 123mph 1/4 trap. God knows what it would have ran with better gear or a higher rev limit

Cheers
shiv