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4:22 rearend
- Thread starter mototron
- Start date
you can buy brand new at www.rootesparts.com
MikeH
Diamond Level Sponsor
Is that just the ring and pinion? I looked on the site,but didn't see it.
Yes. Go here http://www.rootesparts.com/id103.htm then scroll down towards the bottom.
New crown wheel and pinion sets for Alpines and Rapiers: 1:4.22 ,1: 3.89 and 1: 3.70 ratio
Price 245 € + vat
New crown wheel and pinion sets for Alpines and Rapiers: 1:4.22 ,1: 3.89 and 1: 3.70 ratio
Price 245 € + vat
RootesRacer
Donation Time
Mototron,
I cant picture a track slow enough to need the 4.22 gearset.
Are you by chance running overdrive?
Perhaps east coast tracks are slower and tighter?
I have a 3.89 in my alpine, and Ive hit the redline in 4th with it in some places.
Made me want to consider a 3.70 or to find an overdrive that could cope with the power without breaking.
BTW, I ran a 4.55 for a while which is totally useless for anything but an autocross.
I cant picture a track slow enough to need the 4.22 gearset.
Are you by chance running overdrive?
Perhaps east coast tracks are slower and tighter?
I have a 3.89 in my alpine, and Ive hit the redline in 4th with it in some places.
Made me want to consider a 3.70 or to find an overdrive that could cope with the power without breaking.
BTW, I ran a 4.55 for a while which is totally useless for anything but an autocross.
mototron
Donation Time
What is your redline ?
On short twisty Tracks (1.5 miles )the only time I hit 4th gear is halfway down the straight away at about 5 - 5.5K rpm
other wise i can stay in 3rd and run it up to 6500
through most of the track
my power band is from 4500-6500
has anyone used a mustang 7.5" rear ?
What is the width hub to hub ?
Thanks
Rocco
On short twisty Tracks (1.5 miles )the only time I hit 4th gear is halfway down the straight away at about 5 - 5.5K rpm
other wise i can stay in 3rd and run it up to 6500
through most of the track
my power band is from 4500-6500
has anyone used a mustang 7.5" rear ?
What is the width hub to hub ?
Thanks
Rocco
RootesRacer
Donation Time
My redline on the engine in the car is 6500, power band is from 3000 to 6500.
I have another engine where redline is 8000 and power band to 4000 to 7500.
I think the alpine is 50.5 inches flange to flange.
The mustang 7.5 is rather wide (like 54) and are very hard to narrow because you have to buy aftermarket axles since the stockers have rolled splines instead of cut spines.
There are mustang II 8" axles that are just a tad wider than the alpine (51.5), Ive heard people have been able to make them work by getting the right offset of rear wheel. The bigger problem there is IIRC 8 inch ford ratios beyond 4.11 are unobtainium.
sunbeam74
Silver Level Sponsor
Gear Selection
For the East 4.22 is not unusal. Think about the shorter tracks... Lime Rock, NHIS, Nelson Ledges, Roeling road, etc., they really don't have longer straights or large sweeping turns that you see on some of the tracks in the west. (However, Watkins Glen, Bridgehampton, VIR, all had long sections which makes it really tough on Alpine owners! We already have a HP disadvantage to the 356's/others and many times end up with the lesser choice of gears for the rearend... unless you want to make the gear change for the event)
For grins....Tonight I will dig out and post the setup sheets for the SCF Alpine from the 60's. They document the gear setup for every almost every track in the East and even Riverside. However, when you read these gear setups they will seem lower than what you'd assume. Sometimes the gear selction would be driven by the next event, too. If the schedule didn't permit changing the gears then they made the decision which comprimised one of the tracks.
Steve
For the East 4.22 is not unusal. Think about the shorter tracks... Lime Rock, NHIS, Nelson Ledges, Roeling road, etc., they really don't have longer straights or large sweeping turns that you see on some of the tracks in the west. (However, Watkins Glen, Bridgehampton, VIR, all had long sections which makes it really tough on Alpine owners! We already have a HP disadvantage to the 356's/others and many times end up with the lesser choice of gears for the rearend... unless you want to make the gear change for the event)
For grins....Tonight I will dig out and post the setup sheets for the SCF Alpine from the 60's. They document the gear setup for every almost every track in the East and even Riverside. However, when you read these gear setups they will seem lower than what you'd assume. Sometimes the gear selction would be driven by the next event, too. If the schedule didn't permit changing the gears then they made the decision which comprimised one of the tracks.
Steve
sunbeam74
Silver Level Sponsor
Here's some of the rear end choices Don Sesslar made for 1964.
Keep in mind he was running Overdrive but I am surprised by the 4:86 setups....
Marlborough 4:22
VIR 4:22
Cumberland 4:86
Stuttgart 4:44
Bridgehampton 4:44
Road America 4:44
Lime Rock 4:44
Lake Garnett 4:44
Milwaulkee 4:44
Thompson 4:86
Steve
Keep in mind he was running Overdrive but I am surprised by the 4:86 setups....
Marlborough 4:22
VIR 4:22
Cumberland 4:86
Stuttgart 4:44
Bridgehampton 4:44
Road America 4:44
Lime Rock 4:44
Lake Garnett 4:44
Milwaulkee 4:44
Thompson 4:86
Steve
MikeH
Diamond Level Sponsor
Thanks much.
Hi Rocco,
Unfortunately, the Mustang II rear end, or any Mustang rear end for that matter, will be too wide for your Alpine. You will need to have it cut down to the size of your Alpine rear end. If you have one cut down, I would recommend putting the pinion in the middle of the car, not offset to one side like the Alpine unit does.
Jose
Unfortunately, the Mustang II rear end, or any Mustang rear end for that matter, will be too wide for your Alpine. You will need to have it cut down to the size of your Alpine rear end. If you have one cut down, I would recommend putting the pinion in the middle of the car, not offset to one side like the Alpine unit does.
Jose