Rear discs and calipers - upgrade or refresh?
Discussion
Hi all, I've got my diff out to sort the end float on the output shafts and renew the oil seals.
I will be refreshing all the brake parts, as it is easy whilst the diff is out but I was considering an upgrade to ventilated discs. Has anyone done it, does it fit as there seems to be very little spare space and, probably the most important question, is it worth doing?
This is what I was considering:-
Vented Rear Brake Conversion suitable for E-Type series 1,2 & 3 and all other IRS Inboard Disc Models.
Heat dissipation on IRS inboard discs has always been a problem ever since they were first famously fitted to the 3.8 E-TYPE.
Our new vented disc conversion tremendously reduces rear brake fade & uses XJS pads on all IRS inboard disc cars. Output shaft oil seals are subjected to less heat damage and will have a longer life. Used on 6-cylinder E-Types in conjunction with our front vented disc conversion the transformation is extraordinary.
Conversion Kit Includes: 2 VENTED BRAKE DISCS; 2 ADAPTER PLATES; 2 MODIFIED RECONDITIONED CALIPERS; 10 METALOCK DISC NUTS; 2 HANDBRAKE ADJUSTER SCREWS & BRONZE FORKS; FITTING INSTRUCTIONS
full detail on their website
http://www.derek-watson.co.uk/brakes.htm
Thanks, Phil.
I will be refreshing all the brake parts, as it is easy whilst the diff is out but I was considering an upgrade to ventilated discs. Has anyone done it, does it fit as there seems to be very little spare space and, probably the most important question, is it worth doing?
This is what I was considering:-
Vented Rear Brake Conversion suitable for E-Type series 1,2 & 3 and all other IRS Inboard Disc Models.
Heat dissipation on IRS inboard discs has always been a problem ever since they were first famously fitted to the 3.8 E-TYPE.
Our new vented disc conversion tremendously reduces rear brake fade & uses XJS pads on all IRS inboard disc cars. Output shaft oil seals are subjected to less heat damage and will have a longer life. Used on 6-cylinder E-Types in conjunction with our front vented disc conversion the transformation is extraordinary.
Conversion Kit Includes: 2 VENTED BRAKE DISCS; 2 ADAPTER PLATES; 2 MODIFIED RECONDITIONED CALIPERS; 10 METALOCK DISC NUTS; 2 HANDBRAKE ADJUSTER SCREWS & BRONZE FORKS; FITTING INSTRUCTIONS
full detail on their website
http://www.derek-watson.co.uk/brakes.htm
Thanks, Phil.
Kit looks great.. shame you will never see it on the car. I wonder how much better they are..
I remember smoke pouring out of both rear wheels on a track day at Oulton. It got to the stage where the fluid was boiling after just a lap...foot to the floor.. back to the pits....
I put that down to rubbish pads and old/tired fluid and the lack of air back there..
Maybe some air vented somehow into the diff area would have just as much effect?
I remember smoke pouring out of both rear wheels on a track day at Oulton. It got to the stage where the fluid was boiling after just a lap...foot to the floor.. back to the pits....
I put that down to rubbish pads and old/tired fluid and the lack of air back there..
Maybe some air vented somehow into the diff area would have just as much effect?
Edited by mike.williams on Monday 18th April 19:25
mike.williams said:
Kit looks great.. shame you will never see it on the car. I wonder how much better they are..
I remember smoke pouring out of both rear wheels on a track day at Oulton. It got to the stage where the fluid was boiling after just a lap...foot to the floor.. back to the pits....
I put that down to rubbish pads and old/tired fluid and the lack of air back there..
Maybe some air vented somehow into the diff area would have just as much effect?
I've done a few track days in the 400SE all standard, and only once over heated the rears, but not too the point on complete failure, and that was a quite long season.I remember smoke pouring out of both rear wheels on a track day at Oulton. It got to the stage where the fluid was boiling after just a lap...foot to the floor.. back to the pits....
I put that down to rubbish pads and old/tired fluid and the lack of air back there..
Maybe some air vented somehow into the diff area would have just as much effect?
As said on the racers they all have air vent kits, from the side windows, I know there was somone making at some point some under car scoops to vent more air to the brakes (so maybe better for a road car)
Most/maybe All the racers run a brake bias to move more of the breaking to the front.
My last race at Oulton the rear of the car did get very hot and was smoking when I can in after the 20 mins race, but it was the hardest I've ever pushed the car (I'm going to adjust the bias a little more to the front for this year).
So if everything is working correctly you will have to push very hard for quite a while before you start getting problems.
Just get what you have 100% right and some good fluid and pads, and metal locking nuts (nylocks can melt (but can be a good early warning sign))
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