Reddtarga - there is an awesome item to reproduce and sell :)
 

TwoDogs you want awesome braking, purchase from DVS_MR2 has two brake upgrade packages from his cars, gen 3 turbo (around $550 from memory) or full deltaV upgrade (around $1400 from memory), complete with all components.
 

That is definitely spare time well spent.

TonyMR2
Reddtarga - there is an awesome item to reproduce and sell :)
 

Yes I suppose it would be, but I have no interest in doing that because of the huge amount of time needed to make them. I think these are more for do it yourselfers with plenty of time to spare.
 
They were are made from 1 mm aluminum 'coaxed' into a rough shape, then overlaid with fiberglass tape and resin making them surprisingly stiff. They also have a rear support bracket.
Quite apart from the time it took to get the design right without fouling anything on hard lock, the finished articles took a lot of shaping, sanding, and filling needed to get them right not to mention getting the LH side one a mirror image of the RH.
 
Do they actually work?
When I first started this project I did some tests with a rough scoop only on one side. see pic.
I did a series of tests with 4 consecutive hard braking stop from 100 kph, then again quickly accelerated to 100 kph and coasted to a stop to allow the scoop to work if it was going to. I stopped the car and quickly compared rotor temps on each side using an infrared tester, finding that the side with the scoop was cooler, so I then went ahead and made the finished scoops for both sides.
Doing the same tests later with the finished scoops first fitted only on one side then only on the other side indicated the rotor with the scoop was about 15% cooler. Of course tests of this type are only a rough indication, but I think the project was worth the effort.  
 

 

Nice, simple yet effective mod. I like very much. Good work mate!

Sent from my SM-J320ZN using Tapatalk

Redd, Falcon, 
thanks for the responses. 
I have ABS and don't like it. It can activate miles before lock-up. Almost sent me out onto a busy road due to lumps of dried concrete in the braking area. Not sure if I will deactivate it or remove it totally, but it is bad.
I am most confused that Redd says, going to 15/16" MC (which I have already) AND a later booster is too powerful.
Then wouldn't 15/16" with my early booster be close ?
I think I need to check the boost is working properly.
For some reason our booster units seem to cost a fortune where other cars cost $200 ! Are there other Toyota boosters (non-MR2) that might be suitable ?
  
 

TwoDogs
I am most confused that Redd says, going to 15/16" MC (which I have already) AND a later booster is too powerful.
Then wouldn't 15/16" M/C with my early booster be close ?

Well I didn't necessarily say that combination would be too powerful without ABS.
However with my early ABS connected it would have activated too easily with heavy braking, even on smooth dry bitumen, but it is fine with the 1" M/C. 
 
I once tried a 15/16" M/C with my early booster, and it was sorta OK.
The travel was reduced but actual stopping power wasn't that impressive, and it needed a lot of pedal pressure. 

Ok now I think I've got it. When you said you were getting lockups very easily, you meant your ABS activated.
This clears my confusion,  and only supports my opinion of the early ABS trials.
 thanks for the clarification.

Ian. Regarding those front brake air scoops you showed me in Adelaide. Engineers mind and artists hands.
Really very well done. Way too flash for me though. But I'll take two sets if you make em !!
And I like the way you tested them. Real world, sensible. No BS.

I'd like to talk about the boosters for a minute ? 
As I see it, there are only 2 pressures involved, your engine’s vacuum, and atmospheric, it seems the only way to increase the power of the booster, is with a larger diaphragm. I see the later MR2 versions are called “thinner” and I can only imagine that reducing the volumes of the 2 chambers would make a small change to the speed they react. Bite? Otherwise I don’t think thinner means more powerful.
I haven’t been able to find specs (eg diaphragm diam.) on the various boosters Toyota has used or whether a Rav4 or Corolla unit fits….     Hoping someone can confirm or correct my “understandings” above…. Thanks.