BlackLine Vs Quaife

[IamScotticus]

On the Matt Lewis site, and possibly elsewhere,  is a line of differentials, the BlackLine, which appear to be very similar to the QUAIFE torque biasing diffs.  These run a few hundred cheaper than the Quaifes.

 

Does anyone have experience with these?

https://www.mattlewisracing.co.uk/product.php/2860/0/limited_slip_differential__triumph_herald_spitfire_tr7

https://vi.raptor.ebaydesc.com/ws/eBayISAPI.dll?ViewItemDescV4&item=233036752837&category=180406&pm=1&ds=0&t=1633017026000&ver=0&cspheader=1

The Quaife:

https://shop.quaife.co.uk/shop/differentials/quaife-atb-differentials/qdf8k/

 

I am tempted to "uprate" my Ital axle with a Backline HLF080.

I don't have any plans to track so Im wondering if the tradeoffs are reasonable?

 

Edited March 28, 2022 by IamScotticus

[TheDingo8MyBaby]

From what I understand, Blackline helical is a chinese copy of the quiafe "ATB". I have heard that the perform as expected. 

 

My only experience is a Quaife ATB on an Ford "english" axle. It works well on the street; low maintenance and noise, but I found it not aggressive enough for tight/twisty hillclimb-like roads for my driving style. If anyone happens to be in the market for an quaife ATB for an english axle, let me know!

[IamScotticus]

Edumacate me....

the "English" axle is not the Escort, right?  Definitely not the Morris Ital/Marina.

What street cars got English axles?

Is it the same as an Atlas axle?

[7Westfield]

according to the Burton catalog:

"english" axle was in anglias  cortina mk1/2  escort mk1/2   base model capris

"atlas" axle was in capris and cortina 3/4/5

 

on an english axle, the gears come out the front  it's a "pumpkin", like a ford 9 inch

atlas has a cover on the back, like a chevy

 

[IamScotticus]

is Atlas a brand like Dana?

[7Westfield]

no idea

[TheDingo8MyBaby]

As far as I know, Atlas is just a name of the axle type. There is a lot more information here. There is also a Koln axle which is from the same era. I don't believe caterham ever used Koln or Atlas axles. 

 

 

 

 

[speedmodel]

I realize this thread is a bit dated, but I am thinking about getting an ATB style differential for my Elan (street use). I have a Salisbury LSD for an English Ford differential on my shelf, but I'm hesitant to install it because I read LSD is better suited for track use or highly spirited driving.  I'd appreciate hearing from anyone that has experience with both types. I am trying to decide whether to keep the LSD or sell it and get an ATB. 

[TheDingo8MyBaby]

My experience is from a LHD live axle seven with which had an atb, but now has a Salisbury and I recently acquired an Elan with a Salisbury. 

 

On a live axle seven, a lsd is really important for putting the power down. The atb works ok for a big, open track, but in really tight right hand corners it wants to lift the inside wheel and the atb is ineffective. In my seven, the right rear has almost no weight on it. It’s also really important how the lsd is set up - you don’t want to have a lot of preload in a light car or you will essentially have a locked diff. Ramp angles are also important. 

 

On my elan, I feel it’s less important to have a lsd. The Elan puts the power down better than the seven, but I do feel it working from time to time on very tight corners. 

LSD’s do tend to make nasty noises in parking lots, but this isn’t always the case - it depends on the lsd, the use of friction modifier, how it is setup, etc. 

 

The ATB is very user friendly - no adjustments and no noise, but it also has limited effectiveness. YMMV

[speedmodel]

Helpful insights. Thank you