New front brakes finally fitted!
Discussion
domV8 said:
Looking at these myself - but have 2 questions...
1. Does the brake biasing require changing, now the front brakes are bigger..?
2. Once the new front brakes are fitted, can the old brakes (just removed) be fitted to the rears to give larger rear brakes as well..?
???
Dom
If you have the later vented rear discs i think you can just change the calipers and carriers .1. Does the brake biasing require changing, now the front brakes are bigger..?
2. Once the new front brakes are fitted, can the old brakes (just removed) be fitted to the rears to give larger rear brakes as well..?
???
Dom
Richard 858 said:
If anyone knows of a decent rear brake upgrade I'd be seriously interested , having already done my fronts as well.
Posted this before, but Martin Reyland does a 300mm or 320mm rear disc conversion using the standard calipers with larger discs and brackets to suit, so a greater swept braking area, scroll down the page to the bottom.http://www.reyland.co.uk/tvr/
Richard 858 said:
Thanks Rigga, I'm really looking for more efficient calipers though (and lighter !) this seems to be the stumbling block. I may be just being a bit pedantic but I like to do the job right if I possibly can.
You sound like you know what you are talking about ! can you give us the run down ?Not really Daren but more than happy to share the little knowledge I have. All I'm really doing is applying a bit of what I think is common sense mixed with a bit of basic engineering understanding (I have some experience in heavy mobile plant & quarry engineering). I've gone down the route of the WMS 4 pot & 300mm disc upgrade which I found really straightforward to fit, I didn't do any real brake efficiency calculations though, just worked on the basis that they seemed to be a decent improvement / £ spent.
As mentioned I have briefly discussed with Keri at WMS about putting together a 2 pot rear caliper inc. handbrake or may have to fit a separate handbrake caliper (getting a bit expensive then though !). I did do some calcs on contact areas though as brake effort is one thing but I think it needs to relate to tyre / road surface contact area. As I wanted to keep original look I kept the imolas but went to 16" front with 225/45 Toyos (although will probably drop to a 40 profile to improve front/ rear pitch (245/45 rear) without mucking about too much with suspension geometry as this seems good to me the way I inherited it (Racing Red Nitrons all round). I gambled a bit on the 16" rear imolas taking a 245 tyre but have done some airfield testing and all seems ok.
Regarding the rear brakes, although they don't work anything like as hard as the fronts, I'm not keen on the floating / sliding caliper design and strongly recommend anyone with this original set-up to inspect regularly & (if confident enough) to strip, clean & lubricate (copper grease)the sliders fairly regularly (at least once a year (M.O.T. time is a good idea), hence I'm trying to find a decent rear brake set-up.
Sorry for being a bit long winded (that's me) but I'll keep you posted with any developments & will get some pics up with what I managed so far (since beginning my TVR experience in December last). Always appreciate any help & advice I can get.
As mentioned I have briefly discussed with Keri at WMS about putting together a 2 pot rear caliper inc. handbrake or may have to fit a separate handbrake caliper (getting a bit expensive then though !). I did do some calcs on contact areas though as brake effort is one thing but I think it needs to relate to tyre / road surface contact area. As I wanted to keep original look I kept the imolas but went to 16" front with 225/45 Toyos (although will probably drop to a 40 profile to improve front/ rear pitch (245/45 rear) without mucking about too much with suspension geometry as this seems good to me the way I inherited it (Racing Red Nitrons all round). I gambled a bit on the 16" rear imolas taking a 245 tyre but have done some airfield testing and all seems ok.
Regarding the rear brakes, although they don't work anything like as hard as the fronts, I'm not keen on the floating / sliding caliper design and strongly recommend anyone with this original set-up to inspect regularly & (if confident enough) to strip, clean & lubricate (copper grease)the sliders fairly regularly (at least once a year (M.O.T. time is a good idea), hence I'm trying to find a decent rear brake set-up.
Sorry for being a bit long winded (that's me) but I'll keep you posted with any developments & will get some pics up with what I managed so far (since beginning my TVR experience in December last). Always appreciate any help & advice I can get.
Richard 858 said:
All I'm really doing is applying a bit of what I think is common sense mixed with a bit of basic engineering understanding
.
Your not going to fit in at all well with these lot with thinking like that .
Only kidding,interesting ideas but over complicated regarding the rears and the weight of the car involved.
rigga said:
Your not going to fit in at all well with these lot with thinking like that
Only kidding,interesting ideas but over complicated regarding the rears and the weight of the car involved.
You're probably quite right but as I've said before sometimes I'm a bit pedantic ! and I'm known amongst friends as being under simplified ! Only kidding,interesting ideas but over complicated regarding the rears and the weight of the car involved.
I believe increasing the braking efficiency of the rears isn't necessary.
I have the later vented discs with sound working calipers.
Taking it to an extreme, on a wet track day earlier this year, braking hard from about 120, weight transfers to the front as you'd expect, the rear becomes light and even with the standard set up, the rears were locking up giving an interesting slight wagging of the tail, (I'm sure Anthony, QBee was in the car on one of these occasions
)
So, increased efficiency of the rears will really upset the braking causing early lock up of the rears, instability and "look out hedge, here I come"!
All in my opinion of course.
I have the later vented discs with sound working calipers.
Taking it to an extreme, on a wet track day earlier this year, braking hard from about 120, weight transfers to the front as you'd expect, the rear becomes light and even with the standard set up, the rears were locking up giving an interesting slight wagging of the tail, (I'm sure Anthony, QBee was in the car on one of these occasions
)So, increased efficiency of the rears will really upset the braking causing early lock up of the rears, instability and "look out hedge, here I come"!
All in my opinion of course.
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