just got back from the 1/4 track...

[T2urtle]

I am lost and confused.... I have 15 runs the whole night. This is my 2nd time with this car.

Its a 2005 AWD G35x. automatic with slap stick so i can control the shift somewhat. Running completely stock everything except for a spacer mod which should be 5whp or more, proven dynos on this. 215/55/17 all season tires at 50% tread. 17x7 wheels.

My worst and best run stock the first time i went was

R/T .325
60' 2.312
330 6.390
1/8 9.696
MPH 74.43
1000 12.542
1/4 14.917@94.57
---------------

R/T .525
60' 2.417
330 6.410
1/8 9.664
MPH 75.65
1000 12.464
1/4 14.834 @ 91.52

I checked the DA that day last year and it was like -200 DA

Today's DA is 2300

WORST RUN
60' 2.339
330 6.597
1/8 9.986
MPH 72.90
1000 12.878
1/4 15.291
MPH 94.18

and best run
60' 1.745
330 5.934
1/8 9.288
MPH 74.26
1000 12.165
1/4 14.563
MPH 93.41

of the 15 races, 7 were low 15's.

here are the others

----------------------
60' 2.066
330 6.195
1/8 9.524
MPH 74.53
1000 12.391
1/4 14.787
MPH 93.59
-------------------------
60' 2.120
330 6.240
1/8 9.557
MPH 74.80
1000 12.417
1/4 14.805
MPH 93.74
----------------------
60' 2.226
330 6.345
1/8 9.661
MPH 74.90
1000 12.517
1/4 14.903
MPH 93.85
------------------
60' 2.274
330 6.398
1/8 9.707
MPH 75.07
1000 12.556
1/4 14.935
MPH 94.25
---------------------
60' 2.259
330 6.393
1/8 9.714
MPH 74.78
1000 12.576
1/4 14.964
MPH 93.81


I think my 1.7 60' was an error. I dont think AWD all-season tires can hook a 1.7, i thought 2.0 was like great tires. Obviously i need more work on the launch and hook. How can this be improved other then more seat time.

I have no idea what i did to get that. I brake torque anywhere from 1500-2300rpm with traction off. I mash the pedal and go. tires dont spin, the car just goes. at 60 feet its too early for a shift so why is it all over the place ( my 60' time)

 

[Kroze]

I found the problem

 

[jlee]

I pulled a 1.993 in my MR2 with 225-series Kumho Ecsta AST's and they suck. If you have decent tires, I wouldn't be shocked to see a 1.7.

If you're launching at 1500rpm, there's your problem. I launch at 5000-5500rpm...how high can you rev while you brake-torque?

 

[T2urtle]

5000... its an auto... stall is 2500-2800..

my 215/55/17 have about 50% life left, all 4 different branded. They came on the car when i bought it. Waiting for them to wear down so i can do a winter/summer set of wheel/tires. pulling 2.0 was expected of me in a AWD car. but never 1.7 on these tires... any chance of the track or slip being wrong or did it really happen.

 

[SSSnail]

Your car is auto, the best shift points are already calculated for you.

 

[jlee]

5000... its an auto... stall is 2500-2800..

my 215/55/17 have about 50% life left, all 4 different branded. They came on the car when i bought it. Waiting for them to wear down so i can do a winter/summer set of wheel/tires. pulling 2.0 was expected of me in a AWD car. but never 1.7 on these tires... any chance of the track or slip being wrong or did it really happen.

I'd try launching at 2800rpm. If you're not getting any wheelspin on launch, better tires probably won't help you much.

 

[overst33r]

I would think your tires aren't an issue because with better/stickier tires you'd just bog even more.

BTW, most will tell you that the 5whp is within dyno error.

These runs are confusing to me:


R/T .325
60' 2.312
330 6.390
1/8 9.696
MPH 74.43
1000 12.542
1/4 14.917@94.57
---------------

R/T .525
60' 2.417
330 6.410
1/8 9.664
MPH 75.65
1000 12.464
1/4 14.834 @ 91.52

The 60' time is better in the first one, yet the trap is higher. At 1/8 mile your speed was nearly the same for both runs, but at the end of the second run, it was significantly higher, and you got a better 1/4 time... (did you mess up a shift?)

Overall I think you did pretty good! You could easily smoke most S2000 owners at the 1/4

 

[exdeath]

You need a higher stall converter, to start with. 2800 RPM the VQ isn't even doing anything yet and you're not even launching it that high.

Also get a tune that optimizes shift points more aggressively and leave it in D. There is no benefit to using the pretend manual mode on a transmission that still has fluid coupling and planetary gears and computer override.

Do you know what that car should run stock?

 

[Demon-Xanth]

Honestly, you need practice. The first couple times I went out the times were all over the map, but as I got better, my times got very consistent (outside of when I missed shifts) to the point that I was doing back to back runs within a few hundredths of a second. (ie: 15.519, 15.509, 15.524. yes, these were my real times) I just had the problem that ever 3-4 runs inevitably I'd miss the 2-3 upshift. Years of hard shifting (this is my first manual car) wore the synchros out, and I stopped going. My goal was to get 15.4, but I never quite made it. Got damned close though.

Drag racing is one of those things that sounds easy, but most people don't know how bad they suck at it until they get their first time slips.

 

[fbrdphreak]

15's sounds right for your car honestly. The G35 is a heavy pig, you have the automatic AND AWD. Lightly modded 5-speed Subie's run low 14's with more torque, lighter weight and better gears.

 

[T2urtle]

You need a higher stall converter, to start with. 2800 RPM the VQ isn't even doing anything yet and you're not even launching it that high.

Also get a tune that optimizes shift points more aggressively and leave it in D. There is no benefit to using the pretend manual mode on a transmission that still has fluid coupling and planetary gears and computer override.

Do you know what that car should run stock?

i'm not serious about drag racing, its not what i want this car for. I just want to do the best that i can do, so replacing the stall isn't worth it.

there is a $300 trans-go kit, which is a pretty much a valve body mod, firms up and quickens the shifts but i dont think it will help me do any better. I did a couple runs in D and a couple runs in manual mode. All of my faster runs with was in manual mode...

The car stock, there is too much info to go by since there are too many version of G35 and the very few AWD goes to the track.

but "14.4 seconds at 96.5 mph, along with a 0-60-mph time of 5.9 sec." from road and track

http://www.roadandtrack.com/tests/c...ve-sport-sedans/page_3_-_infiniti_g35x_page_3

15's sounds right for your car honestly. The G35 is a heavy pig, you have the automatic AND AWD. Lightly modded 5-speed Subie's run low 14's with more torque, lighter weight and better gears.

all lightly modded subies at the track that night was running low 14's and one 12 second wagon. All had STI VF39 turbo/ intercooler setups.

I believe my fat pig to weight in about 3800-3900lbs. its fully loaded with every feature. minus the spare tire and about 15lbs of trim removed. I weight in at 160-170lb. But 15's are wrong. There should be no healthy G35 in any trim be in the 15's. If the auto RWD sedans can pull 14.3-14.8 stock, my AWD is only about 400lbs more, i should be 14.5-15.0. My plenum spacer should be good for 5whp.

Like most say driver mod is the best mod you can do. If i can make one 14.5 pass, why cant i do it again....

Oh as for the question about my slip no adding up, i did mess up some shifts and bounce off the rev limiter.

I know the car is not a track monster nor will it ever be. if i wanted to track i would of went 350z 6mt for the same price.

 

[thescreensavers]

Yea, always do it in MM, Putting in in Drive will give you slower times. How many miles do you have on your car?

IIRC, the 60 foot you got in your best time is actually true, if you spin your back tires the Front will kick in and you will have a quick 60 foot, though I think its around 2.0, I need to find a thread over at g35driver

and best run
60' 1.745
330 5.934
1/8 9.288
MPH 74.26
1000 12.165
1/4 14.563
MPH 93.41

Edit: cant find the post prob wrong about the 60 foot, lol idk, check out this thread http://g35driver.com/forums/g35-sedan-v35-2003-06/321625-stock-2006-g35x-sedan-0-60-1-4-times.html

oh also what was the outside temp?

 

[T2urtle]

i have 50k on the car. outside temp was 80-90's, car stated 83 while driving there at 6pm.

read that post, actually made a post in there a while ago as well.

one guy must be on something... he said he shifted at 7200... my redline is like 6800-ish. i was shifting at 6500 since the auto does lag at times.

 

[angry hampster]

15 runs in one night? Poor car.

 

[kalrith]

What tire pressure are you running at? I've read that lowering the tire pressure can help at the drag strip.

Also, are you always doing the shifting on your own? If so, then you should try letting the auto do its thing and see what the results are. At the line hold the brake down all the way and press the gas as much as you can before the tires spin. Then just stomp the gas and let off the brake at the same time.

 

[jlee]

all lightly modded subies at the track that night was running low 14's and one 12 second wagon. All had STI VF39 turbo/ intercooler setups.

I believe my fat pig to weight in about 3800-3900lbs. its fully loaded with every feature. minus the spare tire and about 15lbs of trim removed. I weight in at 160-170lb. But 15's are wrong. There should be no healthy G35 in any trim be in the 15's. If the auto RWD sedans can pull 14.3-14.8 stock, my AWD is only about 400lbs more, i should be 14.5-15.0. My plenum spacer should be good for 5whp.

Low 14's with VF39's? They should be doing better than that...tell them to get a better tune.

You did run a 14.5, so I'm not sure what you're worried about. Also remember you don't just have a weight disadvantage...you also have additional drivetrain loss due to your AWD system (when compared to RWD).

 

[Gillbot]

You can't always feel or tell if there is wheel spin. Just because you don't think you are spinning, doesn't mean you aren't spinning. FWIW, car in sig is an auto and I get my best 60's launching off idle. IMHO, there is little point in stalling up on a stock converter and no transbrake. You are only minimally powering up but building tons of heat in the trans.

 

[AdamK47]

If you did an AWD burnout to warm up the tires before the run you would be in the 13s, otherwise it looks about right.

 

[EightySix Four]

Lol, plenum spacer.

The runs really aren't bad for a first time at the track honestly, I would not worry about it.

 

[ayabe]

all lightly modded subies at the track that night was running low 14's and one 12 second wagon. All had STI VF39 turbo/ intercooler setups.

Say what? Just about any noob can pull low 13's on a setup like that unless they are running a crap tune, miss a shift, or don't know anything about launching properly.

 

[T2urtle]

they were FXT with only VF39, TMIC and the up/down pipes with a cobb off the shelf tune. The one i saw and talked to pulled a 14.2

This was overall my 3rd time there but 2nd time running. I have done about 20 passes now.

 

[Silex]

Evo's with AWD get 1.6s 60ft times so 1.7s is obtainable.

 

[zerocool84]

Say what? Just about any noob can pull low 13's on a setup like that unless they are running a crap tune, miss a shift, or don't know anything about launching properly.

MAybe it's just a bad track and everyone is running slow. It happens a lot.

 

[jlee]

MAybe it's just a bad track and everyone is running slow. It happens a lot.

Possibly...an FXT with a VF39, IC/etc and a tune should be running way better than 14's.

 

[T2urtle]

i'm just reporting what they told me and what i saw with my eyes. all 3 were running VF39's are in the mid-low 14's

question... i have my set of forged 18's and soon to put summer tires on it but i was wondering if it would help me be quicker not tire wise but just based of weight.

stock 17x7 rims run about 23.5lbs
forged 18x8.5 run 18.6 lbs

215/55/17 tires should be about 21-22lbs
245/45/18 are 24-25

So really i might shave like 2lbs off each corner. But i was told bigger wheels no matter what will slow down the car, i would have more tire surface and hopefully i can hook better off the line. I'm not going with really sticky stuff like RT615 but more like Hankook V12's or sumitomo HRZ3 tires shortly.