92hatchattack

its all good .. i just think its really silly when i see these guys running mid14's to mid13's and icing down there intake mani ........ i think its kinda rediculous in my opinion....... i dont want to know what times im running with ice on my **** ..... cause im not gonna have ice on my **** when im on the street ,, makes no diffrence to me ...... to each their own ... ya know what im sayin

and go shift your G35 at 5700rpm's ... let me know how that works out for u....... the worse that can happen is a bad run ...... lol ...

infidsg35

iTrader: (2)

I know what you are saying.. Then tell all the people that run with slicks there dumb as well.. If you didnt see what im tring to do its simple.. I want to break into the 13's with only a intake.. That would be a great run for my g35.. Im just tring to come up with good shift points.. Im writing it on here for people to comment.. If you thing anything I do or say is dumb, doesnt make sense or have a better idea please tell me.. Im not a pro this is all new to me.. Im sure icing my Intake manifold isnt going to do much but my friend with a 5.0 mustang that runs in the 12's is going to bring an extra bag for me so should I say no im not fast enough for ice.... My understanding is colder the air more hp you get.. Plus where i was I was running every 10 min... So I figured ice might help to keep cool.. Its just a thought and if helps for 13's then im all game..

2003z

iTrader: (7)

infidsg35, I don't know what its like where you are, but in Atlanta, mid 14s are probably in the top 20% of the timeslips. If you want to ice, go ahead, it will make some difference. Expirement with the shift points, its a good way to figure it out, especially if you get to run every 10 minutes! No one is gonna care if you experiment and it doesnt work out perfect. I plan on using the shift points I calcualted earlier.

92hatchattack

give it a try...... and your understand is prety much correct

colder air=denser air=better combustion=more hp .........

my advive would be to just practice your launch.......98mph is actauly just a bit faster that what i trapped with my z, and ran a 14.0 ........ so theres no reason that if u just go and harcore rape a good launch off ... youll end yourself in the 13's

D'oh

From what I calculated on the Z, it looks like you should shift as close to redline as possible in all the gears.

All I did was look at some Dyno charts and take the force generated on the road at redline in one gear and compare it with the max force in the next higher gear. In all cases the torque at redline in the lower gear was more than the max force in the higher gear. Therefore, there'd be no reason to shif early.

I'd be interested in seeing the calculator you used, since my numbers could definitely have been off (I checked it a few different ways though).

-D'oh!

infidsg35

iTrader: (2)

http://www.my330i.com/gears.php#A

Here is the link for ya..

D'oh

Cool, thanks.

The difference between my numbers and the calculators numbers is that I was taking shift points based on maximising the power and the calculator was basing it's shift points on dropping to Max Torque after shifting (4800 RPM).

It seems like you would want to maximize power for drag racing, but I don't have much practical experience.

The shift points for the Z (6 MT) as given by the calculator were:
6600 1-2
6600 2-3
6133 3-4
6105 4-5
6045 5-6

-D'oh!

Last WS6

I hate the ice down people. Sucks to get behind one and see a little puddle of water on the strip.

infidsg35

iTrader: (2)

those shift points look good but it says when you put in max torque 4800 to - 500-1000 to keep you in the sweet spot longer that is why our numbers are diff. I thing I put max torque at 4300...

OK OK.. I WONT ICE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

D'oh

On the shifting thing:

When you short shift like that you are loosing out on your top end power. The Z is making its Max Power (hehe, Simpson's reference there people) at 6200 RPM, so you definitely want to be shifting after that point. If you shift early, you will get more engine torque in your next gear, but beacuse of the taller gearing you will actually loose out with respect to the force generated by the rear wheels to the road.

Anyhow, I still believe that you should be shifting at redline in the Z for the best times, but I'd be happy to see some testing prove otherwise.

Either way, good luck on your next race. It looks like you did very well, and with more experience those times will only be getting better.

Later,
D'oh!

typeR

shift just before fuel cut