Difference between evo 8 and evo 9 gearing

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Jul 26, 2008, 01:35 PM

john.schuber

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Difference between evo 8 and evo 9 gearing

Does anyone have the gearing information for the 8 and 9. No so much the ratios but stock mph max in each gear. Is the 8 that much higher in fourth since a lot of drag racers switch them out. Also does the buschur and ams drag car have a fifth gear or are they both geared to max out 170+ in fourth.

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Jul 26, 2008, 04:34 PM

Davethewave

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bro, im not sure, but i think AMS and Buschur both use a "DOGBOX" or dogbox style tranny, no syncros, horrible for street driving. im pretty sure its clutchless.

i read about them in some import mag it said something about the gears like
"think pitbull teath rather than chiuaua teeth"

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Jul 26, 2008, 05:28 PM

FloopyDisk

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Stock they're both limited to 155.

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Jul 26, 2008, 05:47 PM

huevosrancheros

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bump for info as well. As far as i heard the evo 8 tranny is better than 9, not sure if that is true or not.

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Jul 26, 2008, 05:58 PM

yellowebo

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Quote:

Originally Posted by FloopyDisk

Stock they're both limited to 155.

To date, 5-8-08 has ran a best pass so far is of 8.88 and a best MPH of 172.74

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Jul 26, 2008, 09:32 PM

john.schuber

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I'm pretty positive the 4th gear on the 8 is longer. I just don't know how big a difference they are mph wise. Bump for gear ratios and mph differences

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Jul 26, 2008, 09:34 PM

diezilnj

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does the 8 tranny bolt right up to a 9?

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Jul 27, 2008, 09:37 AM

MrJdmJimi

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Quote:

Originally Posted by diezilnj

does the 8 tranny bolt right up to a 9?

yep will bolt right up .. evo 8 has longer 1st 4th and 5th i believe .. evo 9 has shorter gears better for auto x

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Jul 27, 2008, 09:49 AM

silver9mr

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well from experience the 8 4th gear is much longer than the 9. i will redline at about 8200k at 110 mph in my 9 and my friends 8 will do about 115 at only 7000k

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Jul 27, 2008, 11:29 AM

#10

Ludikraut

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Stock Final Drive Ratio: 4.529

Gearing VIII/5 - IX GSR- IX MR

1st Gear 2.928 - 2.785 - 2.909
2nd Gear 1.950 - 1.950 - 1.944
3rd Gear 1.407 - 1.444 - 1.434
4th Gear 1.031 - 1.096 - 1.100
5th Gear 0.720 - 0.761 - 0.868
6th Gear -.--- - -.--- - 0.693

Speed with stock final drive, 7500 RPM:

------------ 4th --- 5th --- 6th gear
VIII 5speed: 121.7 - 174.3 - n/a
IX GSR 5spd: 114.5 - 164.9 - n/a
IX MR 6spd.: 114.1 - 144.6 - 181.1

Speed with stock final drive, 8000 RPM:

------------ 4th --- 5th --- 6th gear
VIII 5speed: 129.8 - 185.9 - n/a
IX GSR 5spd: 122.1 - 175.9 - n/a
IX MR 6spd.: 121.7 - 154.2 - 193.2

Speed with HKS 4.11 final drive, 8000 RPM:

------------ 4th --- 5th --- 6th gear
VIII 5speed: 143.1 - 204.9 - n/a
IX GSR 5spd: 134.6 - 193.8 - n/a
IX MR 6spd.: 134.1 - 169.9 - 212.8

Speed with TRE 3.84 final drive, 8000 RPM:

------------ 4th --- 5th --- 6th gear
VIII 5speed: 153.1 - 219.3 - n/a
IX GSR 5spd: 144.0 - 207.5 - n/a
IX MR 6spd.: 143.5 - 181.9 - 227.8

All speeds are in MPH.

l8r)

Attached Thumbnails

Difference between evo 8 and evo 9 gearing-gear-ratios.jpg

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Jul 27, 2008, 11:32 AM

#11

Ludikraut

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Quote:

Originally Posted by Davethewave

IIRC, neither Buschur, nor AMS has gone to a dogbox yet. Both are using non-stock final drive ratios, though.

l8r)

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Jul 27, 2008, 11:37 AM

#12

4kinboost

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Quote:

Originally Posted by Ludikraut

Great Info!!

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Jul 27, 2008, 11:39 AM

#13

4kinboost

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Quote:

Originally Posted by Ludikraut

IIRC, neither Buschur, nor AMS has gone to a dogbox yet. Both are using non-stock final drive ratios, though.

l8r)

Which final drive is Buschur using to get that 155mph trap?

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Jul 27, 2008, 11:43 AM

#14

Ludikraut

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Quote:

Originally Posted by 4kinboost

Which final drive is Buschur using to get that 155mph trap?

Not sure. AFAIK, only the 3.84 and 4.11 final drives are available for our Evos, though. It's also not uncommon to see people mix and match between the various tranny gears (except for the MR 4th and 5th gears) in an attempt to fine tune the gearing.

Personally I'd really like to see something close to a .096 4th gear to be made available.

l8r)

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