Previous best: 96.6x
Today: 98.98

I have made a few basic changes since I last ran such as:
Dynomax muffler replacing stock muffler
MEVI activation point from 5200 to 5000
Put some of that autozone fuel injector cleaner stuff in
set tire pressure at 27 psi

Here's the whole slip

60: 2.447 (ouch that's bad!)
1/8: 76.25
ET: 14.77 (this is pretty bad too)
MPH: 98.98 mph


I finally nailed a 2.2x 60' but for some reason I still pulled a 14.642 @ 98.25

Weather was in the mid 70's and not very humid. Track is in Steele, Alabama.

Another weird thing is my traps fluctuated from 95-98 all day. (That's never happened to me before)

I tried every combination of launch technique I know. Slipped the clutch at anywhere from idle to 3500 rpms, tried dumping it too.

 

what the? could your injectors have been that dirty? lol

I would think you did more weight savings for this time, but for 2mph, thats quite alot of weight to remove, and I would think you would have mentioned it. What, if any, weight savings did you do for this one and the previous time?

Also, just out of curiousity, any reason in particular you changed the activation point for the MEVI? Was it opening too late with your setup?

 

If you spin (loose traction), your traps will go up(its like getting a running start), as compaired to a run where you did not loose traction. Or it could have to do with the car temp. Last time I was at the track my traps rose about 2 m.p.h after I let the car cool down.

 

I took out my spare and jack.
I changed the activation point because it "feels" smoother. On my dyno the tq curve starts to drop right before 5k. (I don't know if that's normal or not)
But Yes I feel like it was opening too late for my setup.

 

Could you explain the part about spinning in a little more detail?

 

You have more time and space to accelerate if you don't get off the line well.

 

Nice traps man. Density altitude may have been a good deal lower than the last time you were there.

That whole notion about spinning your tires making your trap speeds go up is completely ridiculous. I've got over 300 timeslips that say otherwise. I wish I knew who started that notion so I can smack them in the head.

I think that notion is based on the idea that if you BOG your car, your trap speeds will be lower than if you were to spin off the line, which can be true. But a GOOD launch will have higher trap speeds than with a launch where you spin your tires a bunch. Think about it guys. You can accelerate for a full 1320 feet if you get a good launch, or you can accelerate for like 1280 feet or whatever the case may be if you spin your tires for 40 feet on your launch. Stands to reason that your trap speeds will be higher when you accelerate as much as possible for the whole track instead of 95% of the track.

 

Daym - well stated - I never thought of the launch that way, for that reason. Time to warm up the slicks some more!

 

Thanks Neal!
I used the waterbox almost every run this time and I'm getting a much better feel for it. (even though my 60' sucked)

Do you think I'll have a shot at 13's when it gets in the 40's again?

 

maybe it was the fuel injector cleaner,lol. a 14.6 is good for a 96-99 mph trap

 

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what time of the day were you running, I'll look up your DA that day.

If you put some sticky tires on yes, probably not on street tires though. You are going to have to get off the line better obviously, and probably practice shifting faster. Might want to consider powershifting it (not letting your foot off the gas when you press in the clutch) AFTER you can get the normal shifting action itself done faster, it's not the best thing to do for the transmission but I never had a problem with my NA car when I did it. I saw about a tenth of a second difference when I powershifted vs when I didn't.

 

I ran from about 4:00-6:00pm
Traction wasn't the greatest. There was a Nova there running slicks and only pulling 2.1 60'.
So did you powershift on all of your previous bests?

 

I powershifted that car most all the time except the first few times I went to the track with it, except the 1-2 shift because it resulted in too much wheelspin in 2nd. I don't powershift my turbo car because that is just asking for trouble with as much power as it's making.

 

I tend to agree with this based on my track results too but it has to do with the powerband also (which can directly affect 60 foot too). For example, if you can launch around your peak power point, or slightly past to account for the drop when the tires bite, you will get maximum acceleration out of the hole. If you launch somewhere else, you get less acceleration at that point. That's the major reason autos use a higher stall TC, to get up farther into their powerband off the launch. Manuals of course don't have this problem.. hehe

 

As for the powershifting, I generally don't do it on the 1-2, and I've found what I call a "50 lift" often works best on the 2-3. That being lifting up a bit but not all the way... kind of a cross between the granny shift and the power shift. I've occasionally hit mid 0.2 seconds on shift times this way when I'm focused (for those who may not have a feel for it, this is pretty fast).

I don't use the power shift on the 1-2 for the same reason as Neal.. I chirp slicks pretty well even lift shifting (ie-normally). But this probably has to do with track prep as well. Last time out with a much better prepped track I wasn't chirping the 1-2 nearly as much, if at all.

 

Can you list your mods and what rims/tires you were running on??

 

Jim wolf pop charger on a place racing mid-pipe (switching back to stock intake soon), Y-pipe, Dynomax muffer, UR pullies, Mevi, JWT ECU 7200 rpm limiter

I have some cheap BSA 16's with Kumho Ecstas 711's

 

I just looked up the weather and calculated the DA for that day. It is telling me that Gadsden, AL was the closest weather station and that the conditions were 88 degrees and 30.05 baro. You said mid 70s though? Anyway, given the data I have available it's telling me the DA was 2500-2600 feet at the time you ran, which is a bad DA. You are trapping the same as I trapped in similar conditions.

 

Yeh I was just guesstimating the mid 70s part. It was partially overcast so it didn't really feel that hot.
I'm glad to hear that I am somewhat close to what your 96 was running trapwise. To tell you the truth I've held your 96's times as the standard to what I "should" be running. (I literally have most of the same mods as you did)

I appreciate you looking that up for me. I'm thinking about putting my Fidanza Flywheel back in and aiming for 100 mph traps when it gets cooler.