CheshireCat Posted April 30, 2015 Share Posted April 30, 2015 Looking for some feedback / recommendation for the HiSpec 232mm Ultralite 4 calipers with Standard solid discs at the front (Mintex M1144 pads) with standard rear calipers /pads.Currently have standard front calipers with M1144 and standard rear calipers/pads and l am looking at changing the front calipers. I have read historical threads about rattling pads, dust covers, flexing but does anyone have any recent experience of this set up they could share ? Link to comment Share on other sites More sharing options...
stuart147 Posted April 30, 2015 Share Posted April 30, 2015 I have just completed this upgrade. I have opted for the 260mm discs and standard E.B.C pads. I also wanted to do something about the routing of the flexible hoses. The standard calipers have the entry for the banjo on the top, but the Hi Spec calipers have them on the side meaning that the route looks compromised (to me any way). I specified some 90 deg ends on the hoses to allow a better entry for the pipe.I have had none of the problems you mention. BM me if you need more details. There are some, but sorted by Hi spec.Stuart Link to comment Share on other sites More sharing options...
Mankee Posted April 30, 2015 Share Posted April 30, 2015 I run cheapo £12 232mm discs on Hi Spec Ultralite 2-pots on the front of my track car. I've used them with the standard Sierra calipers and now with matching Ultralite 2-pots on the back. All with various different pads and DOT 4 as well as DOT 5.1 fluid and a 13/16" master cylinder. No issues to note. I absolutely loved DS3000s in the front. May be a little overkill for road use though. Link to comment Share on other sites More sharing options...
SM25T Posted April 30, 2015 Share Posted April 30, 2015 I use the ultralite 4-pot alloy calipers from HiSpec with M1144 Mintex pads .... but with 260mm solid discs and blue dot rear pads. Had them a few years with no problems Link to comment Share on other sites More sharing options...
Area Representative Richard Price Posted April 30, 2015 Area Representative Share Posted April 30, 2015 HiSpec 232mm Ultralite 4's with 1144's work fine for me.Unless you're racing or doing track days, and using your brakes hard and often with sticky tyres, I don't see the need for anything more. Infact, I only swapped from standard calipers for the saving in unsprung weigh, and going bigger or ventilated would reduce that benefit.Actually, going to bigger discs on the front is likely to reduce the overall stopping power, unless the rears are upgraded by the same factor.Don't underestimate how much of your stopping power comes from the rear brakes. All but the heaviest engined 7's have a rearward weight bias, and even with weight transfer under braking, theres a lot of rear grip available to be used for braking. Link to comment Share on other sites More sharing options...
CheshireCat Posted May 1, 2015 Author Share Posted May 1, 2015 Stuart, Mankee, SM25T and Richard thanks for the positive and quick feedback, just what i wanted. And thanks Stuart for the phonecall. Link to comment Share on other sites More sharing options...
TomB Posted August 30, 2017 Share Posted August 30, 2017 Thread resurrection if anyone is still about. I was looking into this last night thinking about unsprung weight. The standard Girling callipers weigh 3.2kg each and the Ultralite 4 1kg apparently.http://www.hispeccalipers.co.uk/ul4m16.htmlWhen using with the 232mm disc, do you mean one provided by HiSpec ( grooved or drilled), or literally the standard plain disc and you simply attached the calliper to the upright? I'm running the standard brakes with Mintex 1144 pads on the front and the uprated big master cylinder. All things remaining the same, what what would be the effect of a) reducing unsprung weight by 2kg each side and b) brake feel or stopping power? As an aside, what other ways can unsprung weight be reduced? Do the uprated alloy front hubs reduce weight? Link to comment Share on other sites More sharing options...
SM25T Posted August 30, 2017 Share Posted August 30, 2017 You can just use the standard plain 232mm Caterham (Triumph) solid disc. Link to comment Share on other sites More sharing options...
TomB Posted August 30, 2017 Share Posted August 30, 2017 So I could simply buy the calipers, hoses and pads. My discs are fairly new with no significant lip on the edge. I think I need to speak to Richard Price as he seems to have what I'm thinking about. Link to comment Share on other sites More sharing options...
Area Representative Richard Price Posted August 30, 2017 Area Representative Share Posted August 30, 2017 Tom,You should have blatmail. Link to comment Share on other sites More sharing options...
OliverSedlacek Posted August 30, 2017 Share Posted August 30, 2017 Reduced unsprung weight is always a bonus, and much cheaper than carbon fiber wings. I went for billet Dynalites on stock Triumph disks. IMO the feel of the brakes is significantly improved. Link to comment Share on other sites More sharing options...
Chris- Posted August 31, 2017 Share Posted August 31, 2017 Oliver,Can I ask where you got them and the part number? 120-6807?thank you Link to comment Share on other sites More sharing options...
SM25T Posted August 31, 2017 Share Posted August 31, 2017 Hi-Spec in Dartford. Just up the road from us. Link to comment Share on other sites More sharing options...
Ian R Posted September 10, 2017 Share Posted September 10, 2017 I've got the 260mm solid disks and 4 pots. I made my own hoses and ends to get good routing. I did get pad rattle but simply used some stick on backing pads for the pads and then all sorted. Link to comment Share on other sites More sharing options...
OliverSedlacek Posted September 10, 2017 Share Posted September 10, 2017 Crickey, it was so many years ago I can't remember where I got the calipers from. I got a local machine shop to mill some adapters to match the mounting lugs to the uprights. Link to comment Share on other sites More sharing options...
Area Representative Richard Price Posted September 11, 2017 Area Representative Share Posted September 11, 2017 Oliver's Dynalites are Wilwood calipers.....http://www.wilwood.com/Calipers/CaliperProd.aspx?itemno=120-6807 Link to comment Share on other sites More sharing options...
TomB Posted September 11, 2017 Share Posted September 11, 2017 Suggesting the Dynalites are not a direct fit to the Triumph upright? They look nice though. Link to comment Share on other sites More sharing options...
OliverSedlacek Posted September 12, 2017 Share Posted September 12, 2017 No, not a direct fit, but pretty straightforward once you come to terms with having to make an adapter block. Link to comment Share on other sites More sharing options...
TomB Posted November 16, 2017 Share Posted November 16, 2017 Richard, YHM Link to comment Share on other sites More sharing options...
TomB Posted February 7, 2018 Share Posted February 7, 2018 Last night I made a start fitting the HiSpec UL4 that Richard kindly sold to me. Fairly straightforward really. I needed to file the paint of the top of the pads backing to get them to slide into the calliper, but that's not too unusual.However, as the pad area is slightly larger than the standard pads, the pad does seem to cross into the rougher sand cast centre of the existing disc. There isn’t a significant lip, just the difference between the smooth machined part of the disc and the un-machined centre. Will this cause a problem? (see yellow highlighting on picture below).Do I need to consider new discs, or taking them off and getting them skimmed to make a larger pad wearing area? Or should I just file a couple of mm off the edge of the pad?Or am I worrying over nothing and it will all clean up when they are used in anger? /sites/default/files/images/users/10463/xlarge_Disc%20snip.JPG Link to comment Share on other sites More sharing options...
elie boone Posted February 7, 2018 Share Posted February 7, 2018 I would replace the disc's, looks there is some scoring on the surface, BTW new disc's are really cheap Link to comment Share on other sites More sharing options...
TomB Posted February 7, 2018 Share Posted February 7, 2018 Thanks for your thoughts. Although they look grubby, it’s just the usual winter brake disc surface rust. They’re not scored, just look that way after fitting the new tight pads and turning the wheel by hand. Link to comment Share on other sites More sharing options...
Speedtrip Posted February 8, 2018 Share Posted February 8, 2018 Assuming the area of disc you're talking about isn't the hub shoulder then the pads will take the form of the disc, which arguably reduces longevity. As heavy rust deposits are harder than the pads it can/will contaminate the pads.Personally I'd change the disc for nice new shiny items. Link to comment Share on other sites More sharing options...
TomB Posted February 8, 2018 Share Posted February 8, 2018 Hmm, thats two of you who have said that now, look like I better had! Richard included the discs he ran with the callipers so Ive got a pair matched to the larger pads so shouldn't be too bad to swop them. Link to comment Share on other sites More sharing options...
Area Representative Nick Bassett Posted February 8, 2018 Area Representative Share Posted February 8, 2018 Could the offending rust (which doesn't look too bad in the pic) not been removed with a bit of emery cloth on a sanding pad to keep everything flat? Link to comment Share on other sites More sharing options...
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