What are the differences between the AF Clubmans?

[johnnyXS]

You could easily use a soft pad on an angle grinder to clean up the excess a little, then run a tig or oxy/acetylene torch over the welds to get a little more adhesion and a smoother looking weld.

I think Original box exhaust brackets were spot welded into place prior to assembling the body of the exhaust, spot welding is usually more reliable.

But that's a decent looking exhaust you have there, let me know how it runs on the big block engine it's going onto.

Cheers, Mark.

yes it sure is a good looking exhaust . I'd like it better if it had a chromed tail pipe but then I'm a retro kinda guy.

oxy Acetylene and brazing could be a good option when initially constructed provided the bracket joint isn't subject to a lot of vibration and under stress when mounted.

Tig with a micro torch is the way to go and you have to wonder what sort of back street garage operation these exhausts were constructed in if they haven't got access to professional welders and equipment. my feeling is that the brackets are welded onto the exhausts at a different place to where the boxes are constructed.

[Dimitrios_231]

always liked the gori pipes and the new one looks good, but have been put off by the lack of the extra mounting underneath, seems a retrograde step. anybody confirm that they hold up well?

OOpps, sorry,I missed this,
they hold up really well,
never experienced any broken bracket,especially with the muffler fitted,they are very strong.
The only thing that can go wrong, as with all the standard looking exhausts,is a loose baffle plate.

More bird poo welds they don't look nice but they do their job.

Stratos with Gori 50mm Race



Gori 50GP with early Avanti



A German

[Dimitrios_231]

One of the best looking exhausts for a S2.

[dickie]

Dean from RLC sent me this graph showing bgm clubman, gori gp50 clubman, franspeed 3 and some other pipe, but I don't know what! They're all on a ss225. No idea what carb, crank etc.

Anyway, it's very interesting. Rather peaky, but I'm amazed by the performance regardless.

[Dimitrios_231]

Thanks for sharing.
SS225 has around 190 degrees of exhaust duration,it suits the revvy Gori GP50,
can you ask Dean to send you the dyno graphs for BGM 225 kit?

[bike grim]

Great info on the GP50 Dimitrios. Wish i had followed this post earlier.

[Dimitrios_231]

and some other pipe, but I don't know what!

The other one is a Barone exhaust.

Great info on the GP50 Dimitrios. Wish i had followed this post earlier.

The GP50 performs like an expansion chamber hidden in a box type exhaust,
it is quite revvy and works best with long port durations (it will suit Imola).

I have the dyno from the BGM 225 kits,



BGM,Gori 50mm and Gori 50GP,
I don't know the port durations of the tested kit,
I have done two BGM kits,both had around 175 degrees exhaust timing,very good for a touring setup,
the GP50 gives higher power but for a shorter time,it has a peaky curve not the typical flat curve that most clubmans have,
judging from the graphs,it works better for racing than touring.

The difference with the BGM exhaust on the SS225 kits is simply amazing !!!

[dickie]

Does anyone know the timings on the ss225?

[Dimitrios_231]

With standard 58/107 crank,
ex close to 188,
tr close to 130.

[dickie]

So how do you think this would compare to a ts1 225 with 186 exhaust and 128 transfer? I suspect the shape of the curve would be almost the same but with everything happening maybe 500rpm earlier and say 3 or 4bhp less.

What do you reckon?

[Dimitrios_231]

I can't tell,sorry,
duration might be similar but port time area will be different,
ss225 has different port layout including Boyesen inlet ports and a bridged exhaust,
Scooter Center* says that the transfer port duration is 124 degrees,exhaust port is 190,this gives a massive 33 degrees blowdown which moves the power high/up in the rev range,
if I had to guess,TS1 will be closer to SS225 than BGM225,
but I can't tell for sure,transfer port roof and side angle,duct shape,boost port shape and angle,and many other factors alter the power and torque characteristics.

*188 ex and 130 tr are from some GSF members.

[Dimitrios_231]

The lovely sound of a fresh TV175 engine.
The S2 Casa Clubman is a must for every S1/S2,it is not noisy.

[Scooter Paul]

I'm trying to get hold of a S2 clubman. Patch from Scooter Surgery has promised me one. I like your test rig.
Paul

[HxPaul]

I'm trying to get hold of a S2 clubman. Patch from Scooter Surgery has promised me one. I like your test rig.
Paul

Rimini Lambrettas sell a series 1 or 2 Casa 42mm clubman exhaust.

[Dimitrios_231]

I buy all the Casa stuff locally,I'm lucky for having an official Casa dealer close to me.
Casa 185 kit also works good with the S2 Clubman.



Few revs with the TV175 cylinder while I was strobing.



I hadn't posted the S3 Casa Clubman.



Tino's Ancillotti.

[Dimitrios_231]

MMMMmmmmmmmmmmmmmm,monamour

[bike grim]

Ooohhh....nice.

[Captain Pugwash]

Very nice.....
More info please

[bike grim]

It's the Gori GP50 from earlier in the thread I think.

[Dimitrios_231]

I hope to ride it this weekend,
at the moment,I don't have a chain,
I thought that 15X47 sprockets could work with a worn 80 links chain, but sadly all my used chains were good and tight,
first time that I got dissapointed for not having a worn Lambretta part

I've done high racing porting to this,just for fun I went for 185+ degrees of exhaust timing,
I hope to get something close to 25-30 Bhps

Two Gori GP50 u-bends on the left next to a 50mm Gori race.



Τhe u-bend starts from 41.5mm O/D and goes up to 55.5mm O/D (52.25mm I/D)



It will also be the premiere of the DC Casatronic.
Earlier I lapped the 62/100 JB crank with the 2Kg flywheel.







I also marked the timing to 23.5 degrees for tickover