Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Suplex suspension upgrade .

You are correct - the two arms do indeed need to remain parallel, but because the pivot/hinge points on the chassis are not in line, they may start parallel when parked but they don't stay parallel when the suspension moves. Hence the bumpsteer. But this will help a lot, as right now, mine are a long way out.

For what it's worth, your picture shows a heap more daylight between your shock and header than mine. Maybe I will try to hoik my header out of the way if possible.....

The SUPLEX suspension kit for the M3W has adjustable damping front and rear in monotube dampers, so a far more sophisticated way of adjusting damping than on a basic twintube design like Spax.
The unique SUPLEX front dampers also contain an integral rebound spring to significantly reduce roll angle (like on the 4 wheeler RS kit)and a 'Spring Assist' (like the Rate Riser on the 4 wheeler RS kit) on the damper rod to increase spring rate to give a comfortable compliant ride but with better absorption of bigger bumps.
The rear dampers are again adjustable monotubes but with a rising rate progressive spring so that the rate increases in bump and also include an integral rebound spring to control the rear end after a bump.
Both front and rear ride heights are adjustable; the front to get the integral rebound spring to be just in contact at the defined ride height and the rear to cope with different loads and luggage.
The Spax springs are only linear front and rear.

So the SUPLEX units are far more sophisticated than the Spax units but of course cost more. The SUPLEX units are developments of the original successful SUPLEX units fitted on the initial production of the M3W before Morgan went to Spax for volume production. So SUPLEX have been working on this since the M3W prototype stage. I hope this helps.
Regards PJB

Anybody been able to get any information on Koni coil overs for the M3W?

Yeah I'm a little bummed I was fast on the trigger on the Spax if something better is soon available. I haven't opened up the Spax package yet, so maybe I can find a local (San Fran Area) who might want them.

Where can we get the Suplex information and ordering from, if anyone wants to go that route?

I'm still going with the Empire front end upgrade but still looking for an adjustable ride height and rebound shock with a progressive spring!

The SUPLEX suspension upgrade for the M3W will be available from AeroRacing through the Morgan dealers worldwide. Deliveries are about to start, contact AeroRacing or SUPLEX UK Ltd. Any problems contact me and I'll pas them onto SUPLEX/Morgan. Cheers PJB Peter J Ballard.

Ref Koni, I am not aware that Koni have done any suspension tuning on the M3W to date, I might be wrong but Morgan have not said they have. SUPLEX have done a lot of development work since the very first M3W prototypes. The SUPLEX upgrade uses springs, 'spring assists' and dampers that are tuned for the M3W and are thus unique to the M3W. They are not std dampers and are not std springs. That is why they cost more, there is more technology in them. Cheers PJB

Thanks for all that information Peter .
I was wondering if the front shocks have been developed in conjunction with the comfort kit and/or are they also designed to go with the revised 2014 front suspension improvements ? Or does the adjustability mean they will cope with all setups ?

Hugh

Hugh, the SUPLEX kit for the M3W will work very well with and without the adjustment to the height of the trackrod to radius arm pivot - the "Morgan Comfort Kit". SUPLEX and Morgan (& I)have tested both arrangements, the original and the modified condition, and are very satisfied that the SUPLEX suspension works well with both arrangements.

One of the advantages is that with the front spring characteristic reduces the amount of suspension travel, this is achieved thus:
1. There is very little rebound travel as there is a rebound spring inside the damper to control that. So this restricts total suspension travel so reduces bump steer and increases roll stiffness(NB Merc and BMW are now about to fit dampers on their cars with similar). Spax does not have this.
2. The bump travel is also better controlled as although the initial spring rate is soft for good ride, it soon stiffens up to limit and control bump travel so again reducing bump steer. Spax does not have this.

It is worth recalling that on the first M3Ws that were produced there was no or very little bump steer; OK kickback due to the large scrub radius, as now. I have driven those and of course SPAX and the latest SUPLEX. The first SUPLEX units in the early days also had internal rebound springs and a rising spring rate but were superceeded by SPAX with no rebound spring and no rising rate.

The adjustability in damping rate has been added to give a wider range of ride settings, from comfortable to quite firm for trackdays etc. The front ride height adjustment is needed in the same way as it is needed on the SUPLEX RS for the 4 wheelers to get the rebound spring set, the rear ride height is useful as the initial spring rate is quite soft for good ride so in conjunction with the rising rate spring the rear ride height can be adjusted to cope with two big guys and luggage as well as a single light driver.

SUPLEX considered it was worth building in all the sophistication it could within reason, afterall this is a sports car and should handle like one.

I hope that this helps - regards PJB.

Thanks again , that makes it all very clear ,

Cheers Hugh