[Tigers] Tiger Differential

[twotigers at verizon.net]

I have 2:88 with 205/60-13 tires- runs 3000 rpms at 70 mph.  Kirk

 

From: Tigers <tigers-bounces at autox.team.net> On Behalf Of Joel Martin via Tigers
Sent: Saturday, November 16, 2019 8:03 AM
To: Tiger List Serve <tigers at autox.team.net>
Subject: [Tigers] Tiger Differential

 

The manual shows that Tiger rear ends are:  Salisbury hypoid ‘4.HA’ with a 2.88 to 1 ratio.  What does the 4.HA stand for?

My understanding is these are posi traction meaning both wheels are applying power.

Those of you with 2.88 rear ratio gears, wide ratio 4 speed top loader transmissions, what is your RPM’s in fourth at 50, 60,70 & 80 MPH?  

Those of you running other rear end rations, other factors the same, what are your RPM’s at the same speed and what ratio?

I like to drive my cars and just got back from a 1,263 mile 6 day trip in my original owner 1973 MGB with 229,000 miles on the car.  

Things to consider:  1966 MK1A with 289 HiPo motor with about 300 HP and estimated 9.4.1 compression

600 cfm 4 barrel Holley carburetor

Headers with 2.25” exhaust

15” wheels running 205\50 x 15 tires

Wide ratio top loader 4 speed transmission

Believe Salisbury posi rear end 

Closed, open, locked, posi, ratios – the list is endless.  What I am looking for is a very streetable around town and on the highway posi rear end ratio that will work well with a good balance between acceleration for fun and highway cruising.  I am not there yet.  I have the acceleration for fun part in place but not the highway cruising (of course - avoid highways\interstate).

Data means a lot regarding RPM’s at speeds between 50 to 80 mph.  Those of you who have switched ratios, please share your pros and cons.

Thank you for your input.

Regards

Joel Martin

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/tigers/attachments/20191116/e2686e0b/attachment-0001.htm>