www.imoc.co.uk Forum Index
 AlbumAlbum CalendarCalendar FAQFAQ SearchSearch MemberlistMemberlist Legal NoticeLegal Notice IMOC 1/4 Mile1/4 Mile Table Knowledge BaseKnowledge Base   RegisterRegister 
 GarageCommittee GarageGarage  SubscriptionPremium Membership  ProfileProfile   Log in to check private messagesLog in to check private messages   Log inLog in 
Calendar 
mk2 brake master cylinder upgrade

 
Post new topic   Reply to topic       www.imoc.co.uk Forum Index -> MR2 MK1 1984-1989 NA & SC
View previous topic :: View next topic  
Author Message
SuperRedMR2




Joined: 16 May 2005
Posts: 5486
Location: Wickford, Essex
Feedback Score: 8

1990 Toyota MR2 Mk1b

PostPosted: Fri Mar 02, 2012 2:20 pm    Post subject: mk2 brake master cylinder upgrade Reply with quote Reply with quote including images

Does it matter if I buy a master cylinder that is off of the ABS model?
Back to top
User is offline 
tommundy
Premium Member



Joined: 10 Oct 2008
Posts: 136
Location: East Yorkshire, UK
Feedback Score: 11

1988 Toyota MR2 Mk1.5 Turbo

PostPosted: Fri Mar 02, 2012 7:08 pm    Post subject: Reply with quote Reply with quote including images

You want a non-ABS one afaik. [thumleft]

You'll also need to bend the brake pipes to fit the new cylinder.
Back to top
User is offline 
Steve Horrocks




Joined: 16 Dec 2004
Posts: 7172
Location: Oldham
Feedback Score: 26

1994 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Fri Mar 02, 2012 8:12 pm    Post subject: Reply with quote Reply with quote including images

It's a non ABS one & rev2 onwards as well (15/16's) early mk2 was 7/8's same as a mk1.
Back to top
User is offline 
SuperRedMR2




Joined: 16 May 2005
Posts: 5486
Location: Wickford, Essex
Feedback Score: 8

1990 Toyota MR2 Mk1b

PostPosted: Sat Mar 03, 2012 12:41 pm    Post subject: Reply with quote Reply with quote including images

tommundy wrote:
You want a non-ABS one afaik. [thumleft]

You'll also need to bend the brake pipes to fit the new cylinder.


Thanks Tommy, was unaware of that...Don't really want to be bending pipes in case they snap...May not get this after all.
Back to top
User is offline 
Steve Horrocks




Joined: 16 Dec 2004
Posts: 7172
Location: Oldham
Feedback Score: 26

1994 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Sun Mar 04, 2012 5:13 pm    Post subject: Reply with quote Reply with quote including images

The bending is really just a case of gently manipulating it by hand to be a touch lower. No big deal really.
Back to top
User is offline 
Neil_turbo




Joined: 23 Aug 2005
Posts: 2878
Location: Congleton
Feedback Score: 67

1987 Toyota MR2 Mk1.5 Turbo

PostPosted: Mon Mar 05, 2012 4:54 pm    Post subject: Reply with quote Reply with quote including images

was barely any bending needed for mine, really no big deal [thumleft]
Back to top
User is offline 
aw11rally




Joined: 31 Dec 2008
Posts: 763

Feedback Score: 5

1984 Toyota MR2 Mk1a

PostPosted: Mon Mar 05, 2012 5:35 pm    Post subject: Reply with quote Reply with quote including images

Neil_turbo wrote:
was barely any bending needed for mine, really no big deal [thumleft]


Is it worth doing Neil? Noticeable difference? Theoretically you need to press harder but less travel in the pedal, is that what happens in practice though?
Back to top
User is offline 
Neil_turbo




Joined: 23 Aug 2005
Posts: 2878
Location: Congleton
Feedback Score: 67

1987 Toyota MR2 Mk1.5 Turbo

PostPosted: Mon Mar 05, 2012 5:41 pm    Post subject: Reply with quote Reply with quote including images

I did this as i have changed my calipers to a rev3 turbo set up, so the standard mk1 MC just didnt shift enough fluid (these have twin piston fronts)

I never really had any issues on standard brakes, so for me i wouldnt change it, if running standard calipers. I guess if just doing this it will decrease feel

I am effectively now running a standard late spec mk2 set up, as even my discs are off a mk2 now!

At the weekend we gutted the bias valve, so will see what happens at the first sprint a week on sunday!
Back to top
User is offline 
aw11rally




Joined: 31 Dec 2008
Posts: 763

Feedback Score: 5

1984 Toyota MR2 Mk1a

PostPosted: Mon Mar 05, 2012 7:11 pm    Post subject: Reply with quote Reply with quote including images

I see, so you shouldn't notice any difference as I guess the ratio of MC to piston size is unchanged i.e. As Toyota intended.

We're running huge bremsport 4pots (over 300mm disc) up front and mk1a fronts on the back. The MC is the standard mk1a jobbie, we've got a very long pedal but it requires very little pressure. Occasionally it goes straight to the floor which can be unnerving at high speed. At present I'm not sure whether this is pad knock off after high G corners, the lack of fluid volume moved by the standard MC or the poor vacuum from the ITBs.

I think a mk2 15/16 MC will be the first thing to try.

We currently just drive around the problem with a little left foot braking on the straights at full throttle, this seems to solve the problem. Can cause stained boxers when it catches you out though.
Back to top
User is offline 
Lauren
IMOC Committee



Joined: 13 Dec 2004
Posts: 38620
Location: Greater Manchester
Feedback Score: 0



PostPosted: Mon Mar 05, 2012 7:49 pm    Post subject: Reply with quote Reply with quote including images

Doh thought the post was about the servo rather than the master cylinder(!).
_________________
2013 GT86 Injen Induction. Volks Racing TE37s & TRD Aero Fins, Mega sounds. TEIN Street Flex 5/6kg, TEIN EDFC Active Pro. Tuning Developments Remap 4-1 Manifold, TD resonated exhaust, decat/overpipe, AP Racing 4 Pot front brakes. [lover]
Back to top
User is offline 
[email protected]
IMOC Affiliated Company



Joined: 14 Dec 2004
Posts: 7640
Location: durham
Feedback Score: 30



PostPosted: Mon Mar 05, 2012 7:54 pm    Post subject: Reply with quote Reply with quote including images

Quote:
I would say putting a MK2 master cylinder on is a downgrade


Well you're wrong, it moves more fluid at a slightly lesser pressure, reducing the Mk1's tendancy to lock the fronts, resulting in better stopping power and a reduced overall stopping distance over stock.

Coupled with the twinpot Celica calipers and a gutted bias valve it's one of the best brake upgrades you can do to a Mk1.

The above is proven fact over ten years of doing this.
_________________
Back to top
User is offline 
Lauren
IMOC Committee



Joined: 13 Dec 2004
Posts: 38620
Location: Greater Manchester
Feedback Score: 0



PostPosted: Mon Mar 05, 2012 8:23 pm    Post subject: Reply with quote Reply with quote including images

As I said in my previous post I misunderstood and thought the topic was about the servo, not the master cylinder.
Back to top
User is offline 
IanParkhouse




Joined: 29 Mar 2007
Posts: 147

Feedback Score: 1



PostPosted: Thu Apr 12, 2018 7:03 pm    Post subject: Reply with quote Reply with quote including images

Oh no! I'm slowly losing brake fluid!

I've ordered this:
https://www.ebay.co.uk/itm/Toyota-MR2-MK2-Gen2-Revision2-to-Revision5-Brake-Master-Cylinder-none-abs/273152208869?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908103841%26meid%3D0dd0e678ca634132be54cb6b426fb7ed%26pid%3D100227%26rk%3D1%26rkt%3D11%26sd%3D273152208869%26itm%3D273152208869&_trksid=p2054502.c100227.m3827

Which I think is the appropriate Mk2 version.

Was thinking I'll throw a seal kit in when it comes, does this look like the right kit: https://www.sparepartstore24.co.uk/7799197-abs
Back to top
User is offline 
Display posts from previous:   
Post new topic   Reply to topic       www.imoc.co.uk Forum Index -> MR2 MK1 1984-1989 NA & SC All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group