Suffering from Long pedal?
SSC Australia has developed an improved brake master cylinder for race and track day cars that have 4 pot front callipers.
More info here:
nope never had a problem since I fitted the old 2 pots on the back 
Good to know someone is making these bits if you do need them though
Interested in Ade’s feedback.
One of he winter projects is to fit 2 pots to the rear. I’ve heard that the brake travel maybe slightly longer, but still acceptable.
Of more concern is balance. Going through my mind is Sean’s 315 conversion to the front and using my present 308s on the back with the 2pots (worrying about handbrake at a later stage).
Do you think that would give me too much rear braking? Presently I have PF01’s in the front 4 pots and 97s in the standard rear. I guess I’ll go 01 in the rear 2 pots. Whatever, John, you’ve got a purchase coming your way so feel free to chip in.
Slightly back on thread, I have SSC stuff in my car and it is tip top.
I never had any problem with the brakes on my S2 and that had 4 pot fronts and standard rears. Brakes were always spot on. Is this just a problem on earlier cars?
I went 315’s because they were cheaper than 308’s and bigger is always better, obviously!
Brake bias adjustment is a great thing to have. It is amazing how much more rear bias a Lotus can take, but like suspension, its something that needs adjustment if you are going to get the best out of it.
Obviously Gav and Jonny have both gone to sleep now at the thought of adjusting something. 
Look at the F1 boys, they adjust brake bias several times per lap!! Now I know we are all at a bit of a different level to that, but the principles of getting the most out of what you have got, still apply.
Believe me, being a short, balding, ginger bloke, that has always been a philosophy I have lived by!!
The old rear calipers are made of cheese and flex dreadfully you only need to look at the uneven pad and disc wear on a track car. This is one reason why I changed, also John suggested you could add bucket loads of rear braking and he was correct, the car does not dive in the same way it did.
I have also considered moving my 308mm discs to the back and going 315mm on the front but I’m not sure the effect on the brake balance and if you would then add too much to the rear.
Sadly it is hard to run a hydraulic handbrake or bias valve on the S2 as the rear brakes are dual circuit due to the ABS.
I would be interested in a spot caliper conversion but have not been in a position to fund the first one but I was considering it this winter if I went 308mm on the rear, I do need new rear discs as mine seem to have run out of grooves but I still need a handbrake for MOT 
I’m looking into the rear spot thing, but some of the spots are not much lighter than the brembo, so perhaps a spacing bracket is needed for the brembo. However, as said, I’m on the job.
Is John alive? Do his 315’s fit nitron’s floating bell?
[quote=SeanB]I never had any problem with the brakes on my S2 and that had 4 pot fronts and standard rears. Brakes were always spot on. Is this just a problem on earlier cars?
4 pot fronts, standard rears, RS14’s all round. Brakes always spot on too.
But see this re rear brakes and bias…(brake discussion is near the end)
<LINK_TEXT text=“YouTube … _INdbXMqsw”>YouTube</LINK_TEXT>
There are two 315mm AP discs available
One to fit the Lotus /AP bell with a pcg of 190.5mm and the same with a pcd of 177.8mm to fit the ‘Nitron’ bells.
They are about the same price, I have the 315/177.8mm discs on the shelf
[quote=661]I’m looking into the rear spot thing, but some of the spots are not much lighter than the brembo, so perhaps a spacing bracket is needed for the brembo. However, as said, I’m on the job.
Is John alive? Do his 315’s fit nitron’s floating bell? [/quote]
A spacer bracket would be good, I think I could live without a handbrake apart from MOT time.
Can i be the first to mention drver training?*
Adjusting your technique may provide the biggest gains of all 
Won’t look good on the cars spec sheet though.
\
- I am no expert btw, just a driving numpty like most of us on here
[quote=seriouslylotus]There are two 315mm AP discs available
One to fit the Lotus /AP bell with a pcg of 190.5mm and the same with a pcd of 177.8mm to fit the ‘Nitron’ bells.
They are about the same price, I have the 315/177.8mm discs on the shelf [/quote]
Presumably the 190.5 PCG disc is lighter as it has a bigger bell?
I have Alcon 308’s on the front with Nitron bells, these seem to work well. I’ve been impressed by the wear rates. Do PF or Alcon make discs to fit either of these bells?
Talking brackets, the 2pot brackets arrived from Steffen in Italy. Bloody nice pieces of engineering. 200 notes. Can’t knock that. He’s trying to fabricate a solution for the handbrake. watch this space.
I got the calipers from Junks as the guy on ebay selling them had gone quiet. Turns out he was a Lotus employee who liked collecting shiney things.
Yes Tim, driver training is key, but less fun.
Steffen’s supplied brackets are nice if a little heavy and just fit and work.
Now lining up all the other bits for the 308mm rear brake conversion.
[quote=661][quote=seriouslylotus]There are two 315mm AP discs available
One to fit the Lotus /AP bell with a pcg of 190.5mm and the same with a pcd of 177.8mm to fit the ‘Nitron’ bells.
They are about the same price, I have the 315/177.8mm discs on the shelf [/quote]
Presumably the 190.5 PCG disc is lighter as it has a bigger bell?
I have Alcon 308’s on the front with Nitron bells, these seem to work well. I’ve been impressed by the wear rates. Do PF or Alcon make discs to fit either of these bells?
[/quote]
The Alcon discs are actually lighter than the AP discs,due to material thickness etc.
Alcons not currenly available in the AP sizing, but could be with enough interest, However if going that route a 315mm disc could be made to fit the AP sized bells. Anyone???
According to Sean there is an affordable 315 disc already. Was that a solid disc or rota for fitting to a bell?
In answer to your question Dave, yes I’m interested in a 315 rota, but if AP already do one for the larger bell and Alcon do (a lighter) one for the smaller bell, there seems enough choice.
To my mind there’s little advantage of a larger bell if the attached rota is heavier?
Gotta say … and I’m no racing driver…
That the last thing I think needs improving on my S2 is brakes …
… yea … before anyone comments , mine is currently sorned due to gearbox issues
[quote=jfk]Gotta say … and I’m no racing driver…
That the last thing I think needs improving on my S2 is brakes …
… yea … before anyone comments , mine is currently sorned due to gearbox issues [/quote]
with 4 pots up front I have to agree
[quote=scoob][quote=jfk]Gotta say … and I’m no racing driver…
That the last thing I think needs improving on my S2 is brakes …
… yea … before anyone comments , mine is currently sorned due to gearbox issues [/quote]
with 4 pots up front I have to agree [/quote]
x3 Bias valve would be interesting for wet weather TD’s but not imperative.
I just installed my old stock fronts on the rear and installed an AP bias control no ABS, so what’s the proper procedure to adjust the rears to the 4 pot AP’s up front on the road ?
Even lock up ? Of all the shit I’ve done with cars over the years this is a first for me.
Yeah Frank, its a balance thing. You really want the fronts to lock up marginally before the rears in the dry.
Get yourself to a deserted open space and just have a play. I have found that what you have it set to in a straight line in the dry, you normally want a tad more to the front, as if you trail brake into a corner, you can lock a lightly loaded inside rear.
I guess we dont have to talk about the wet, as your new car will never go out in it.
I’m back in Simi Valley in mid January, my turn to buy the burgers!!