SoFla01SSLookinstok

Time to let the cat out. So at the track last Friday my 12 sec car happened to click off an 11 for some odd reason. This is basically our winter down here so I take what I can get. The DA was still 1300+. Better than normal.

So only made two passes. Both PB. First was a 1.98 60' with a 12.07 et. Mph was 94/122 on both runs. Second run was 1.84 60' with 11.80 et. Car still bogs down to 2300 rpm. Close to a 5k rpm launch.

If hiho can help out with a couple questions:
-How can a 12 sec. car make an 11 sec. pass?
-Why, from my last 3 runs actually, with a difference of .24 60' time, are my mph's still the same?
-Do you think the car has ability to go faster?

Car is really just a 12 sec street car. 0% of mods were done for drag strip performance in mind.

HCI2000SS

iTrader: (2)

I forget your mods exactly. What kind of power are you making?

HCI2000SS

iTrader: (2)

Edit: Nevermind I remember now. Your 11 second pass seems right in line with the 12 second pass based on the difference in the 60 ft

SoFla01SSLookinstok

Lol. If anyone want's to know setup just ask.

It's pretty close. A hair better on the times down the track with new PB. The difference in 60', between the two passes, that night, were almost right on with .1 better 60'=.2 better 1/4 et.

weedburner

With a more efficient launch, 122mph says you have the power to run 10.80
Mph is an indicator of power, power didn't change so mph stayed the same.
Et is an indicator of launch efficiency. A little extra tire spin or maybe the clutch slipping a little more than usual could have easily improved your launch.

big hammer

My best mph with bolt ons always followed my best 60'. 119-121. We aren't talking wild swings. 1-2 mph. A 60' bog can kill mph. Welcome to the 11's friend.

SoFla01SSLookinstok

I don't think my car has the ability to go 10's "as is"(even with gear change). It's pretty safe to say that with a gear change, & drag pack, the car would be able to run mid/low 11 sec.

The track's been pretty sticky. Some clutch slip would be good but first gear is so long. This clutch doesn't like extra heat either.

Some cars I just saw run: c7z a8, cat delete & DR, 10.9@120, hellcat a8 running mid/low 11@122-123, c6z ran an 11@122.

The bog has to be holding a little back. Got a jump for the 60' but the 60'-330' time is poop & shows the hurt from the bog.

Prob the best time slip the car will get.

weedburner

If your RST is pulling the engine down to 2300, you are not using it's potential. Given 3.42x2.66 gears and 26" tires, your RST looks to be slipping only about 0.5-0.6 sec. Even though it's organic, it's still an 800hp capable dual that can be slipped well past 1.0 sec at your power level. At 2300, your engine is probably making less than 150hp.

Raising launch rpm is an effective way to increase slip time, as is adding a launch control device like the Magnus unit. With 1.0 sec of slip, bog rpm would improve to a little under 4k. That little change alone would more than double your horsepower at the low point of the bog.

Grant

SoFla01SSLookinstok

You're right. Your thought of the time of clutch slip sounds close. I can get the time from the data. As from vehicle speed to the stop in rpm drop. Rear tires are closer to 28". The rpm dropping that low is crappy.

In the beginning of the year I did a couple runs. The first three were good. By the fourth run the clutch was slipping pretty good on the shifts. Telling me it got a little too hot.

Your ideas would definitely help the launch. As it's my street car I don't think I'll be doing much else to it right now for the launch.

Thanks for the input Grant.

Jtm2085

iTrader: (1)

It can be tricky getting a m6 car off the line efficiently. I don't see why it couldn't it break into the 10's after you get it sorted

jhshnh

You absolutely have the power to hit 10s. Just get that 60ft sorted out and you're there. There's plenty of good advice from guys running M6s on here to help. Anyway, congrats on the 11 second time!

SoFla01SSLookinstok

Thanks guys. I'm happy it clicked off an 11 for what it is.

Just for info. The car is going through the traps right around 6800 rpm in third gear.

rpturbo

iTrader: (47)

If your happy with it, thats really all that matters. I know if my truck was running 122 at the trap, and I was getting a 11.8x slip, I would be pretty unhappy, and wanting at least a low 11 slip. I have my setup more drag oriented though and just adjusting my suspension can alter my 60' by .5 at least.

SoFla01SSLookinstok

Thanks rpturbo. I'm happy. Just hitting the 11 was good for me. If I wanted more et I would change the rear gears out. Oh yeah..still OEM, 16 year old shocks & springs lol.

I guess mostly for Grant. I checked the data & the clutch was actually slipping for just over one second. Basically 5k rpm dragging down to 2300rpm. Definitely not the most efficient setup for getting out of the hole.

HCI2000SS

iTrader: (2)

The fact that you're trapping with C7Z's and Hellcats says a lot.

SoFla01SSLookinstok

Thanks man. It's funny. When I'm at the track, & watching street cars run, the mph is always more interesting to me. Like I thought the c7z would trap a little higher. Although he ran a 10. Then seeing a vw golf trapping 124 or something. Lol.

HCI2000SS

iTrader: (2)

Yeah I'm the same way since I can't hook for **** lol. At least with MPH I know what I can hang with if I have traction lol. Ironically I got to do a roll run with a stock GTR on the way home from the track. He was running consistent 11-11.1 at 120 at the track, and from a roll it was basically dead even. That gave me decent indicator of what I could do with traction. On nitrous forget about it...total spinfest lol

SoFla01SSLookinstok

That's awesome man. Staying next to a GTR would make me feel good. A couple little mods to those things & they run. Good thing you have the button lol.

What kind of tires are you running? Do you have a sticky set?

HCI2000SS

iTrader: (2)

Yeah on the 150 shot i've ran with some really high hp rides. I run a 315/33/17 NT05R, but on the 150 shot it spins all on 2nd, and sometimes a little of 3rd in cool weather. No sticky tire as of yet. I'm to worried about snapping the little 10 bolt lol. One I change that I'll throw on a slick. What tire/wheel combo are you running? Im sure I'll remember after you tell me again, I just do feel like looking back lol

ddnspider

iTrader: (26)

Congrats man! I know you've been chipping away at it, nice to drop into the next time bracket. It's tough getting a remotely full weight 6 speed car out of the hole when its making some power. Someone said it above, a quick slip is your friend instead of a clutch dump. I ran the RST as well. I am surprised you're still in 3rd going through the traps though, but you did say your tires are closer to 28".