Steeve_Civic

Could you help me choosing my Gear Ratio.

I know that they are lots of parameters.
Max RPM around 9500
Tires Size: 24.5'' or 26''
Power: B-Serie 6766Turbo 30 PSI around 750 HP.
Etc...

Strips are slippery here, so I'm looking for a 1st and 2nd long gear.

But generally, what are the selected options?

Here is the gear Calculator I use
http://teammfactory.com/gear-calculator

Steeve_Civic

Please help me to choose the good setup

Teggyb18a

curious whats your whole setup motor wise? im on same turbo but make same hp at 10 more psi so im just wondering whats different between us

ekcoupeh22

iTrader: (2)

i think i could be wrong im no expert but i think it will be to completely different ratios for a small tire vs big tire

Steeve_Civic

B18c1 84mm AEBS sleeves
Manley rods
Cp pistons
6766 AR .96
Front Facing AFI manifold with dual 44mm
S2 proseries cams
hondata S300
1300cc injectors
Dual walbro 255


10psi 750hp???
Please post your dyno sheet and some videos!

tepid1

Steve, you'd want something in the 4.40 final range especially if you plan on running 26" tires.

Teggyb18a

no im 750 at 10 MORE psi than what your running, not at only 10 psi lol.

83mm c1 block GE sleeves CP pistons full race topmount dual 44mm sk2 pro 1 cams 2200cc injectors dual bosch 044 pumps 6766 ar 1.32

fukenboostin

I have a similar setup aswell, 83mm 10:1 cp's flat faced intake valves, pro 1's 6765 t3 housing .82.. 740/538 @ 29 psi.. Didn't finish tuning

zakura R

24.5"= 4.4 final drive
26"=4.4 if ur making more than 900whp plus
26"=4.6 final drive
26"=4.7 final drive

Steeve_Civic

Thank you,
G force gear ratio or Liberty?

Steeve_Civic

What is your RPM in 4th gear at finish Line?
Should it be past 9000RPM?

ohsnapzafingcu

iTrader: (2)

depends what your power band looks like. with a stock k20a2, 4.76 final, 22" slicks and my 2600lb car i passed the traps around 9200 rpm, it didn't want to rev anymore and i cringed everytime i did.. i actually shifted into 5th a few times and still ran the same time. lol

Steeve_Civic

Here is an idea of gears I could run (G-Force)
On the left my OEM Gearbox, on the right the Dogbox



What do you think?
Should I run longer in 3rd and 4th?
At the moment my best time is 10.31@144Mph

DeLucia

Rev it to whatever it has to be so you dont have to shift 5th

Steeve_Civic

Hey guys, please help me to choose

MARC P

Can always go with PPG and get 2 fd ratios for each tire size.


Marc P

bads2k

depends a lot on gearing and if your motor is good for the extra rpm's. I go through the traps at 10,000

Turbo-LS

iTrader: (4)

If the motor is built properly then rev it till you need. I go through the traps at 9600@155mph with gsr gear set 4.4 final 24.5" slicks

nonvtecallmotor

I ran a 4.0 final drive with a 1.0 4th gear when I trapped 160mph I went threw at 8200rpm. When I changed gearing I didn't notice a difference in MPH only RPM

Steeve_Civic

I finish at 8200@141.
It feels that my engine is fine past 9000rpm and would like to shorten the 4th in order to finish around 9000rpm.
Perhaps It would be better to run the 4th between 8000 to 9000 instead of 7200 to 8200?
I m running 6766 A/R .96 with S2 Pro1's cams

Steeve_Civic

Is there a inside cam of your car?

Steeve_Civic

With 24.5 tires?
Which rpm are you shifting?

Garage 808 Hatch

I was crossing the traps around 95-9600. Stock GSR gears, 26" tires. Depends on powerband where you want to cross at IMO

Turbo-LS

iTrader: (4)

I dont have a video of that pass because my wifi remote and backpack went dead but i do have some in car video

Steeve_Civic

nice !
Lot of burn in this run even in the 3rd gear.
Don't you think you could get more traction with a longer gearbox?
How many RPM do you shift?