Gear ratio advise please

70_charger · Post by **70_charger** » Sun Nov 01, 15 6:29 pm

Strange s60 Dana so ratios are 3.54, 3.73 , 4.10 then all the way upto 5.88!!

GJUK · Post by **GJUK** » Sun Nov 01, 15 6:43 pm

5.88!! wow.

Yeah that gets my vote

4.1 you can live with on the road, just (me anyway). But it depends where you are going to be doing the miles.

Pete · Post by **Pete** » Sun Nov 01, 15 7:07 pm

My Coronet has 4.10 gears (Dana) but I have 30" tall Mickey Thompsons on it and that gives a 2:1 overall ratio regarding engine speed > 2000 rpm = 40mph, ergo 4000 rpm = 80mph; which you can live with - but the pick up is immense!!!!

70_charger · Post by **70_charger** » Sun Nov 01, 15 7:24 pm

Pete what size are tyres? I'm running 295/50 at the moment. 4K 80mph I could live with sit at 60 on motorway normally as caravan is on the back

Pete · Post by **Pete** » Sun Nov 01, 15 8:01 pm

M/T 29.5 x 12.5 x 15's - actually work out at 30" tall on an 8.5" Rim....

Pete · Post by **Pete** » Sun Nov 01, 15 8:02 pm

....mind you, a Coronet has big rear wheel tubs, probably larger than a Charger.

Cannonball · Post by **Cannonball** » Sun Nov 01, 15 8:44 pm

Pete wrote:....mind you, a Coronet has big rear wheel tubs, probably larger than a Charger.

they are the same the coronet still has that stupid bulge in the outer wheel house to restrict tires a bit like on a charger

Cannonball · Post by **Cannonball** » Sun Nov 01, 15 8:45 pm

Go for the 3,73 then shaun,,,,, or dump the dana

Pete · Post by **Pete** » Sun Nov 01, 15 8:48 pm

...and Superstock springs on the highest setting.

70_charger · Post by **70_charger** » Sun Nov 01, 15 10:13 pm

Don't mind having two sets of rear wheels 1 tall tyres for street and 1 for strip
Thou Pete n Dunc now have me seriously considering the 4.10's

Swapping back to 4 speed from auto as original 4 speed car and I enjoy driving it on street more with manual but yeah now the trans will be a weak point as after blowing the release bearing 1 time then 2 events later blowing clutch that's why I went with tci race auto. So billet flywheel twin disc clutch will being fitted.

70_charger · Post by **70_charger** » Sat Dec 12, 15 10:55 am

After lots of research the difference in motorway rpm 3.73 - 4.10 isn't that much and 4.10 more punch of the line so I've ordered 4.10's just need some 295/65x15 tyres now

Pete · Post by **Pete** » Sat Dec 12, 15 10:58 am

It will be interesting to see how the track times stack up, it is hard to be consistent with a swore speed.

70_charger · Post by **70_charger** » Sat Dec 12, 15 12:26 pm

Yeah I know Pete but miss driving with the 4 speed and more of a challenge on the strip. Looking at twin disc clutch and hydraulic throw out bearing but $$$$

challenger · Post by **challenger** » Sun Dec 13, 15 3:53 pm

heres what i run shaun, 3.73,s on 275x60x15 approx 27" tall on the street 60 mph@3000rpm 70@3650 just enough to deal with motorway work, 28x10.5 on the track and still good enough for 11.8.s with mild converter, if your towing a caravan to the track you should be fine with 4.10s as i guess your limit is 55-60

70_charger · Post by **70_charger** » Mon Dec 14, 15 10:21 am

Yeah sit at 55ish with caravan on the back Jim.