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 
Best clutch for racing

 
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
El colonel




Joined: 25 Sep 2017
Posts: 4

Feedback Score: 0



PostPosted: Mon Sep 25, 2017 10:59 am    Post subject: Best clutch for racing Reply with quote Reply with quote including images

I race a 1989 mk1b used for racing and I ride the clutch at the start for an average of 5 secs.
I have used Blue Print but they fall apart after 20 to 25 race starts so I'm looking for a clutch that will last longer. Any suggestions except don't ride the clutch cos it gains me places at the start.
Thanks


Last edited by El colonel on Tue Sep 26, 2017 9:37 am; edited 1 time in total
Back to top
User is offline 
PW@Woodsport
IMOC Affiliated Company



Joined: 14 Dec 2004
Posts: 7586
Location: durham
Feedback Score: 30



PostPosted: Tue Sep 26, 2017 6:06 am    Post subject: Reply with quote Reply with quote including images

An 89 Mk2 you say.... this is the Mk1 section, I don't think an 89 Mk2 even exists! [Very Happy]

To help you further can you clarify exactly what car you have?
_________________
Back to top
User is offline 
Gazza_DJ
Premium Member



Joined: 29 Nov 2010
Posts: 3031

Feedback Score: 11

1997 Toyota MR2 Mk2 NA Rev4

PostPosted: Tue Sep 26, 2017 9:55 am    Post subject: Reply with quote Reply with quote including images

Dec 1989 SW20's do exist Paul!
Back to top
User is online now 
El colonel




Joined: 25 Sep 2017
Posts: 4

Feedback Score: 0



PostPosted: Tue Sep 26, 2017 10:02 am    Post subject: Clutch for racing Reply with quote Reply with quote including images

Sorry guys its a typo I race a Mk1b
Looking forward to your advise [Embarassed]
Back to top
User is offline 
kaiowas




Joined: 07 Jun 2005
Posts: 1942
Location: Norfolk
Feedback Score: 10

1985 Toyota MR2 Mk1a

PostPosted: Tue Sep 26, 2017 10:39 am    Post subject: Reply with quote Reply with quote including images

I've been sprinting my mk1 for years, mostly with a 4A-GZE (n/a clutch and gearbox type though so still relevant to you)

I fitted a brand new blueprint clutch in 2008 and it still had life in it when I replaced it after 7 years, 50 or so events and well over 500 sprint starts.

I turbo charged my engine at the start of the 2016 season (Currently putting out 260 odd HP) and at the same time fitted an Exedy Stage 2 Cerametallic paddle clutch have since done another 10+ sprint events (with at least 6-8 starts per event) with no clutch issues.
Back to top
User is offline 
PW@Woodsport
IMOC Affiliated Company



Joined: 14 Dec 2004
Posts: 7586
Location: durham
Feedback Score: 30



PostPosted: Tue Sep 26, 2017 1:38 pm    Post subject: Reply with quote Reply with quote including images

Gazza_DJ wrote:
Dec 1989 SW20's do exist Paul!


Well I've learnt something there, always thought they began in 90.
Back to top
User is offline 
Gazza_DJ
Premium Member



Joined: 29 Nov 2010
Posts: 3031

Feedback Score: 11

1997 Toyota MR2 Mk2 NA Rev4

PostPosted: Tue Sep 26, 2017 1:53 pm    Post subject: Reply with quote Reply with quote including images

PW@Woodsport wrote:
Gazza_DJ wrote:
Dec 1989 SW20's do exist Paul!


Well I've learnt something there, always thought they began in 90.


They might as well do really, December 1989 cars are very uncommon. I've seen just 1 in several years!
Back to top
User is online now 
El colonel




Joined: 25 Sep 2017
Posts: 4

Feedback Score: 0



PostPosted: Wed Sep 27, 2017 9:41 am    Post subject: Best clutch for racing Reply with quote Reply with quote including images

Wot about my clutch guys cos thats twice its broken up with me on start line?
Back to top
User is offline 
jimi




Joined: 14 Dec 2004
Posts: 2047
Location: Kingdom of Fife
Feedback Score: 0

1988 Toyota MR2 Mk1b

PostPosted: Fri Oct 06, 2017 2:10 am    Post subject: Reply with quote Reply with quote including images

Perhaps you need to rethink the way you start ?
Phil managed over 500 sprint starts out of a standard blueprint clutch with more power available than you have and still had life left in the clutch (he also suggests a possible uprated replacement)
kaiowas wrote:
I've been sprinting my mk1 for years, mostly with a 4A-GZE (n/a clutch and gearbox type though so still relevant to you)

I fitted a brand new blueprint clutch in 2008 and it still had life in it when I replaced it after 7 years, 50 or so events and well over 500 sprint starts.

I turbo charged my engine at the start of the 2016 season (Currently putting out 260 odd HP) and at the same time fitted an Exedy Stage 2 Cerametallic paddle clutch have since done another 10+ sprint events (with at least 6-8 starts per event) with no clutch issues.
Back to top
User is offline 
El colonel




Joined: 25 Sep 2017
Posts: 4

Feedback Score: 0



PostPosted: Fri Oct 06, 2017 9:31 am    Post subject: Best clutch for racing Reply with quote Reply with quote including images

I start races by, once the red lights go on, i pull on the flyoff handbrake lift revs to say 5k slowly engage the clutch til its straining against the handbrake and revs fall back to say 4k then up to a max of 10 secs later (average 5secs) when lights out I'm off the line like a shot.
So all I want is the toughest clutch available to withstand the wear at the start for more than 20 races. I presume you guys are not holding at 4k revs with the handbrake for up to 10 secs and lihts out, but that gives me a really advantageous start.
Racing next weekend and need a new clutch NOW.. [Evil or Very Mad] [/b]
Back to top
User is offline 
kaiowas




Joined: 07 Jun 2005
Posts: 1942
Location: Norfolk
Feedback Score: 10

1985 Toyota MR2 Mk1a

PostPosted: Fri Oct 06, 2017 9:31 am    Post subject: Reply with quote Reply with quote including images

To be fair a race start is probably different to a sprint start.

I don't need to worry about reaction times (timing only starts when I break the timing beam) so I don't need to hold the bite point for very long before launching whereas in a race start I'd imagine it's normal to hold the bite point at high rpm for several seconds waiting for the lights to change.

Also having more power works in my favour slightly, when I was sprinting the car as an n/a I would launch it from 6000 RPM on a warm day and it'd just go, if I tried that with the s/c or turbo I'd get nothing but wheelspin so I'm launching from much lower rpm these days.
Back to top
User is offline 
Lauren
IMOC Committee



Joined: 13 Dec 2004
Posts: 38548
Location: Greater Manchester
Feedback Score: 0



PostPosted: Fri Oct 06, 2017 4:55 pm    Post subject: Reply with quote Reply with quote including images

What you are doing is burning the clutch out. I think given your launch style you just have to accept that you keep changing clutches frequently, or give it an easier time at the start. I would never hold the clutch slipping with the handbrake on.

When I used to race MK1s I always had trouble with wheelspin, but I don't slip the clutch. As it was a 20 minute race I had time even with a bad start (which happened most times) to make it up.
_________________
1985 AE86 Sprinter Trueno GT-Apex [lover]
2013 GT86 Miltek Exhaust, decat/overpipe Injen Induction. Volks Racing TE37s & TRD Aero Fins, Mega sounds. TEIN Street Flex 5/6kg, TEIN EDFC Active Pro. Tuning Developments Remap [lover]
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