Which Diff - Page 2

Dynoryder · 12-03-2010, 05:57 PM

what have you done to the block have you had it dynoed the power band might be higher than 6500

TBM · 12-03-2010, 06:50 PM

It is just a club car ,with an XU1 block on a social day at WSID , balanced and Hydraulic cam 6500 rpm is about it .I know how exact you guys get ,and I'm not that serious anymore , I thought the diff may just help it along on the day .

Dynoryder · 12-03-2010, 06:58 PM

yea go the 4:1 it dosent sound like you drive it enough to worry bout fuel

eh468 · 12-03-2010, 07:07 PM

what type of diff is it to get 4to 1 ratio. I have played around quite a bit years ago with holden sixes even had a super charged one on alcohol for a bit and what I used was started with was 3.55 to 1 and finished with 4.44 to one and 3.55 was to tall as i would cross the line stretchen 3rd because i found by slecting 4th i acually lost time due to power curve on the six it wasn't much time but was slower and with the 4.44 it would have been awsome for 1/8 mile but stretched the motor to far over the 1/4 so my experience 3.9 to one would have worked the best with the manual box i had behind the normally aspirated 192 red I had in full bodied car with the tyre height 14" rim 245 50's i ran with the 3.55 it would run 14.0 at 98mph I was running a close ratio supra box and I think the m21 box is wider in the ratio so if it is 4 to 1 it should work well. A mate of mine had a lc torana with 202 triple su's with trimatic and banjo with I believe had 3.9 to 1 it ran 13.5 at about 98 99 mph but the car weighed nothing.

Dynoryder · 12-03-2010, 07:14 PM

it's funny that a 202 has to go such a high ratio when a six pac charger 265 can do a 13.8 stock with i think 3.1:1 diff gears (thats on modern 14" tyres)

eh468 · 12-03-2010, 07:22 PM

Quote:

Originally Posted by Dynoryder

it's funny that a 202 has to go such a high ratio when a six pac charger 265 can do a 13.8 stock with i think 3.1:1 diff gears (thats on modern 14" tyres)

yeh I know the 265 was an awsome donk except for some oil issues but the torque on the 265 was were it was at due to longer stroke when I had my blown six the record holder at the time was running a 265 val engine.

TBM · 12-03-2010, 08:38 PM

Quote:

Originally Posted by eh468

what type of diff is it to get 4to 1 ratio. .

It's a bolt in limo from a gear exchange place , I'll find out what it's made up out of when I pick it up , the old Toyota Crowns ran a low holden diff .

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12-03-2010, 05:57 PM	#11 (permalink)
Dynoryder Banned because i am a retard Join Date: Oct 2009 Location: A.C.T. Ride: vr commy Posts: 1,002	what have you done to the block have you had it dynoed the power band might be higher than 6500

12-03-2010, 06:50 PM	#12 (permalink)
TBM Clutch Popper Join Date: Jan 2010 Location: Katoomba Ride: Torana Posts: 79	It is just a club car ,with an XU1 block on a social day at WSID , balanced and Hydraulic cam 6500 rpm is about it .I know how exact you guys get ,and I'm not that serious anymore , I thought the diff may just help it along on the day .

12-03-2010, 06:58 PM	#13 (permalink)
Dynoryder Banned because i am a retard Join Date: Oct 2009 Location: A.C.T. Ride: vr commy Posts: 1,002	yea go the 4:1 it dosent sound like you drive it enough to worry bout fuel

12-03-2010, 07:07 PM	#14 (permalink)
eh468 Brake Slammer Join Date: Nov 2009 Location: Newcastle NSW Ride: 632 eh holden, 307 eh holden, 6 ltr ssv ute Posts: 105	what type of diff is it to get 4to 1 ratio. I have played around quite a bit years ago with holden sixes even had a super charged one on alcohol for a bit and what I used was started with was 3.55 to 1 and finished with 4.44 to one and 3.55 was to tall as i would cross the line stretchen 3rd because i found by slecting 4th i acually lost time due to power curve on the six it wasn't much time but was slower and with the 4.44 it would have been awsome for 1/8 mile but stretched the motor to far over the 1/4 so my experience 3.9 to one would have worked the best with the manual box i had behind the normally aspirated 192 red I had in full bodied car with the tyre height 14" rim 245 50's i ran with the 3.55 it would run 14.0 at 98mph I was running a close ratio supra box and I think the m21 box is wider in the ratio so if it is 4 to 1 it should work well. A mate of mine had a lc torana with 202 triple su's with trimatic and banjo with I believe had 3.9 to 1 it ran 13.5 at about 98 99 mph but the car weighed nothing.

12-03-2010, 07:14 PM	#15 (permalink)
Dynoryder Banned because i am a retard Join Date: Oct 2009 Location: A.C.T. Ride: vr commy Posts: 1,002	it's funny that a 202 has to go such a high ratio when a six pac charger 265 can do a 13.8 stock with i think 3.1:1 diff gears (thats on modern 14" tyres)