What should someone expect to pay to get the Evo III rotors redrilled to 4X100?
I posted it above but I'll post it again here.
The Mitsubishi parts catalog only lists 1 part number for the lancer coupe and the mirage which is MB699641 and 1 part number for the sedan which is MB699551.
The Mitsubishi parts catalog lists 4 part numbers for the fto which are assigned to the following model types
Small Brakes No ABS MR129300
Small Brakes ABS MR129301
Big Brakes No ABS MB699641
Big Brakes ABS MB699553
Of these MB699641 is the only one of interest and is the same part number as the lancer.
Your theory isn't supported as you don't know Mitsubishi's chosen ratio and didn't test with a swapped valve. How do you know the ideal split is 70/30? Plus a proportioning valve reduces rear brake pressure in proportion to front pressure and so the split would change once the split point is reached and continue to change.
Edited to correct wrong part numbers
Another edit. The sedan proportioning valve (MB699551) is the same as evo 3 (also MB699551)
I think you just need to accept that Mitsubishi knew what they were doing when they picked the proportioning valve to use. But you could try rebuilding your rear calipers.70/30 from what I've read is a starting point for brake bias. Different cars will require different brake bias granted, but I think 91/9 isn't quite right.
What else, if not the brake prop valve could attribute to this?
There are a fair few people on Colt UK and mivec.co.nz who have had some kind of issue with the brake prop valve and have been trying to source ones from a Cyborg etc
For the price of pads that will give good bite on stock brakes, you could afford a big brake upgrade which will work better than just better pads. Yellowstuff, Greenstuff, Project Mu etc are the go-to's.Brake pad upgrade on std brakes?
1.5L mirage stockish not really requiring a full brake upgrade just good quality pads. Quite a few brands on the market do i spend the extra on bendix etc or go for a cheaper brand.