26 replies to this topic

[f1karting]

I've driven an Esprit (89SE and 91 X180-R) with and without LSD on street and track (back to back) and I can tell you the LSD makes a big difference. So much so that I bought an LSD from GTO for my 89SE.

Travis.. Was that an ATB or ZF type diff you tested?

I am in the process of ordering a complete upgraded UN1 from GTO Racing and was discussing the ZF or ATB diff option. Each type seems to have its advantages and disadvantages. I was concerned that the ATB would go into open mode if one wheel broke ground, upsetting the car. The ZF on the other hand could create added understeer on power-on lock-up. If you can shed more light, that would be helpful.

Lee and Kevin at GTO seem like upstanding sorts to deal with. Any feedback on their product and service?

Edited by f1karting, 28 October 2010 - 11:08 PM.

[Vulcan Grey]

Travis.. Was that an ATB or ZF type diff you tested?

I am in the process of ordering a complete upgraded UN1 from GTO Racing and was discussing the ZF or ATB diff option. Each type seems to have its advantages and disadvantages. I was concerned that the ATB would go into open mode if one wheel broke ground, upsetting the car. The ZF on the other hand could create added understeer on power-on lock-up. If you can shed more light, that would be helpful.

Lee and Kevin at GTO seem like upstanding sorts to deal with. Any feedback on their product and service?

The X180-R uses a ZF limited slip differential. The Quaife is of course an ATB.

The ZF will be better for racing or super competitive track driving, but the Quaife will be 99% as good for all purposes except when one wheel is off the ground as you said. And it does seem to add some understeer. My car has almost none.

Kinda like my car here recently


The Quaife also acts primarily as an open diff at high speeds where no differential wheel speed is happening.
The ZF will act as a locked diff until friction makes it slip.

both feel great in the Esprit, and I would not go back to an open diff!

GTO was great to deal with even from overseas via email and the phone (though the Welsh are difficult to understand).
I paid via a bank transfer.

You can see my install here
http://picasaweb.google.com/lotusse/LotusQuaifeLSD#

I was able to seal the oil from leaking, just fine. Some complain that the Quaife is difficult to seal, since it does not have the o-ring grooves.

Edited by Vulcan Grey, 29 October 2010 - 11:42 PM.

[FastZilla]

Awesome post!!!

A few questions from a noobey

No LSD in the 2004 UN1?

Anybody upgraded to the 6sp GTO solution?

Does the stock 2 disc clutch handle 500hp (RW Hp)?

What point do the axles need to be upgraded (Hp)?

Would like to take the car to the 500 Hp figure it was intended to be...

Thanks!

[mike_sekinger]

Hello,

To answer those questions:

- no, there is no LSD fitted as standard in any of the V8 variants

- there are a few on here: RobC has the GTO 6-speed (email: Rob Carrier)

- the stock AP twin plate is specified to handle 400Nm, but has been proven to handle over 450Nm.
Both GTO and AP can supply the 1" 23T friction plates.

- the next weakest link is the CWP in the gearbox. This is also rated to 400Nm, but has been proven to handle over 450Nm.
Running high engine outputs will run the risk of CWP failure.

There are plenty of chargecooled V8 projects on here to give you some ideas for increased power.

Good hunting

Cheers,
Mike S

[FastZilla]

Mike replied to your PM - thx!

Then what starts breaking at 500hp?
I've got the following understood:
- Transmission
- Clutch

What about axles, motor mounts, wheel studs, etc.?

- Edited to keep on topic of thread.

Edited by FastZilla, 09 December 2010 - 06:53 PM.

[Che]

I bought mine from GTO - they fit for sure. Transmission upgrade + quaife atb is much cheaper to Kevin (GTO)....good person to talk to.
http://img248.images...8417/gtokit.jpg
I agree, the AP clutch for Esprit is a zhyte box. Kevin sold me a stronger pressure plate, I sent my twin disc to re-line (Clutchnet), they are working pretty darn good.
Here is the picture and part #. I did not use the paddle disc, I'm scared about judder.
If you want to experiment....here you go. YES, it works!!
http://img264.images...04242008064.jpg

[WEllison]

Che,

I tried to send you a PM about your latest posting, but you can't receive ant PMs?

You can e-mail me at wellison@sbcglobal.net

Wayne