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 
6 speed LSD Mk1 gearbox build
Goto page Previous  1, 2, 3, 4, 5, 6  Next
 
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
[email protected]
IMOC Affiliated Company



Joined: 14 Dec 2004
Posts: 7611
Location: durham
Feedback Score: 30



PostPosted: Mon Jan 14, 2013 7:41 am    Post subject: Reply with quote Reply with quote including images

Interestingly the new 4.312 FD ratio for the 6 speed takes the theoretical top end speed up to 144mph v 128mph on the 5 speed, assuming the 4a-ge has the power to get it there.
_________________
Back to top
User is offline 
gon




Joined: 31 Jan 2008
Posts: 78

Feedback Score: 3



PostPosted: Mon Jan 14, 2013 7:41 pm    Post subject: Reply with quote Reply with quote including images

no prob, thank you Paul for all your contribution, including this thread.

I have pictures of the crown and pinion of the c52 and of the c64 (celica T sport) if anybody fancies counting teeth I can put them up.

The C64 (celica and corolla T sport) does have a 4.53 final ratio

I am attempting to put the gear ratios of the C64 inside a C52, and keeping the mk1b driveshafts, for that I am trying to swap the spider gears inside the open diff... let us see how that goes ....
Back to top
User is offline 
[email protected]
IMOC Affiliated Company



Joined: 14 Dec 2004
Posts: 7611
Location: durham
Feedback Score: 30



PostPosted: Mon Jan 14, 2013 7:59 pm    Post subject: Reply with quote Reply with quote including images

Interesting idea swapping the spiders, wouldn't it just be easier for you to run a pair of Mk2 shafts though?

That really is job done and they are stronger than Mk1 shafts.
Back to top
User is offline 
gon




Joined: 31 Jan 2008
Posts: 78

Feedback Score: 3



PostPosted: Mon Jan 14, 2013 8:06 pm    Post subject: Reply with quote Reply with quote including images

It would be, but budget is reallyyyy tight now...

I will see if I can get the clearances right, if not I will have to spend another 100 quid on them shafts ... but then if I already have the shaft I would probably get the mk3 lsd .... and the missus will not be happy at all [Mr. Green]
Back to top
User is offline 
[email protected]
IMOC Affiliated Company



Joined: 14 Dec 2004
Posts: 7611
Location: durham
Feedback Score: 30



PostPosted: Tue Jan 15, 2013 7:42 am    Post subject: Reply with quote Reply with quote including images

Who is in charge of the Mk1 knowledge base these days?
Back to top
User is offline 
Peter Gidden - SBITS
IMOC Affiliated Company



Joined: 25 Jan 2005
Posts: 10505
Location: South Yorkshire - 07710 648257
Feedback Score: 18

2002 Noble M500

PostPosted: Tue Jan 15, 2013 8:45 am    Post subject: Reply with quote Reply with quote including images

[email protected] wrote:
Who is in charge


wassat?

[Mr. Green]
_________________
Engine Builder to Simon Hicks - 555bhp 532ftlbs
Brighton National Speed Trials Class Winner 2011
Brighton National Speed Trials Class Winner 2010
Brighton National Speed Trials Class Record Holder 2010 on
Back to top
User is offline 
The Silver Fox
Premium Member



Joined: 23 Oct 2007
Posts: 63
Location: Tadcaster
Feedback Score: 0

1985 Toyota MR2 Mk1a

PostPosted: Tue Jan 15, 2013 1:19 pm    Post subject: Reply with quote Reply with quote including images

Paul,

I have no technical knowledge of gearboxes but given that your long fifth gear mod also has a ratio of 0.725, what are the differences in performance between the boxes? Am I correct in assuming the six speed box will give better acceleration?
Back to top
User is offline 
jimi




Joined: 14 Dec 2004
Posts: 2062
Location: Kingdom of Fife
Feedback Score: 0

1988 Toyota MR2 Mk1b

PostPosted: Tue Jan 15, 2013 3:20 pm    Post subject: Reply with quote Reply with quote including images

Excellent write up Paul [thumleft] Do you mind if I copy it it for KY2 ? Credited to you of course [Smile]
Back to top
User is offline 
stenky




Joined: 23 Mar 2011
Posts: 356
Location: Slovakia
Feedback Score: 2

1989 Toyota MR2 Mk1b

PostPosted: Tue Jan 15, 2013 3:26 pm    Post subject: Reply with quote Reply with quote including images

The Silver Fox wrote:
Paul,

I have no technical knowledge of gearboxes but given that your long fifth gear mod also has a ratio of 0.725, what are the differences in performance between the boxes? Am I correct in assuming the six speed box will give better acceleration?
The contribution of this gearbox is twofold. Gears 2,3,4,5 provide better performance due to slightly shorter gearing. Namely its +7,7%(2nd) +13,1%(3rd) +20,3%(4th) and +12,4%(5th) torque to wheels increase over C52.
6th retains highway cruising efficiency as the fifth 0.725x4.312 mod.
Basically a win-win situation. Performance without compromising fuel consumption (not that I cared about this much).
Back to top
User is offline 
[email protected]
IMOC Affiliated Company



Joined: 14 Dec 2004
Posts: 7611
Location: durham
Feedback Score: 30



PostPosted: Tue Jan 15, 2013 4:55 pm    Post subject: Reply with quote Reply with quote including images

jimi wrote:
Excellent write up Paul [thumleft] Do you mind if I copy it it for KY2 ? Credited to you of course [Smile]


Yes by all means Jimi fire away mate, i'm trying to get it added to the Imoc KB but not much response yet..... Imoc seems to be a ghost ship with nobody at the helm these days! [Very Happy]

Thankyou for clarifying Stenky.
Back to top
User is offline 
jimi




Joined: 14 Dec 2004
Posts: 2062
Location: Kingdom of Fife
Feedback Score: 0

1988 Toyota MR2 Mk1b

PostPosted: Tue Jan 15, 2013 6:11 pm    Post subject: Reply with quote Reply with quote including images

[email protected] wrote:
jimi wrote:
Excellent write up Paul [thumleft] Do you mind if I copy it it for KY2 ? Credited to you of course [Smile]


Yes by all means Jimi fire away mate

Cheers Paul, it's done http://www.mr2oc.co.uk/know-your-2-knowledge-base/mr2-mk1.html?catid=3&prodid=2&kbartid=272 [Cool]
Back to top
User is offline 
stenky




Joined: 23 Mar 2011
Posts: 356
Location: Slovakia
Feedback Score: 2

1989 Toyota MR2 Mk1b

PostPosted: Tue Jan 15, 2013 6:24 pm    Post subject: Reply with quote Reply with quote including images

jimi wrote:
[email protected] wrote:
jimi wrote:
Excellent write up Paul [thumleft] Do you mind if I copy it it for KY2 ? Credited to you of course [Smile]


Yes by all means Jimi fire away mate

Cheers Paul, it's done http://www.mr2oc.co.uk/know-your-2-knowledge-base/mr2-mk1.html?catid=3&prodid=2&kbartid=272 [Cool]
yay, my gearbox is going to be famous [Very Happy]
Back to top
User is offline 
coanda




Joined: 15 Apr 2009
Posts: 512

Feedback Score: 3

1988 Toyota MR2 Mk1 SC

PostPosted: Tue Jan 15, 2013 10:27 pm    Post subject: Reply with quote Reply with quote including images

Thanks for taking the time to share this with us Paul - will come in handy in the future considering how far away I am from Woodsport.

Any problems with the 4agze?
Back to top
User is offline 
[email protected]
IMOC Affiliated Company



Joined: 14 Dec 2004
Posts: 7611
Location: durham
Feedback Score: 30



PostPosted: Wed Jan 16, 2013 6:59 am    Post subject: Reply with quote Reply with quote including images

I've been asked that a few times, in terms of fitting the gearbox to the engine it will fit, the SC shafts won't work though, they would need to be Mk1 for non LSD or Mk2NA for LSD.

What isn't clear is wether a SC has the same gearbox mounting position, i always presumed they were the same but when i came to put a SC engine into a Mk1 NA one time i had to modify the mounts.... so i'll have to say yes it will fit but might need torque mount mods.
Back to top
User is offline 
MartG




Joined: 07 Apr 2005
Posts: 6028
Location: Poulton le Fylde, Blackpool
Feedback Score: 4



PostPosted: Wed Jan 16, 2013 12:45 pm    Post subject: Reply with quote Reply with quote including images

IIRC The rear torque mount on an SC has, in addition to the two bolts that go vertically up from below, two bolts that go horizontally through the crossmember [Think]
Back to top
User is offline 
[email protected]
IMOC Affiliated Company



Joined: 14 Dec 2004
Posts: 7611
Location: durham
Feedback Score: 30



PostPosted: Wed Jan 16, 2013 4:30 pm    Post subject: Reply with quote Reply with quote including images

Thanks Mart, i knew about the extra bolts, but i also think the torque mount relative position to the gearbox is also different, i think it's because the SC box is E series based and Mk1 NA box is C series.
Back to top
User is offline 
[email protected]
IMOC Affiliated Company



Joined: 14 Dec 2004
Posts: 7611
Location: durham
Feedback Score: 30



PostPosted: Sun Jan 20, 2013 6:58 pm    Post subject: Reply with quote Reply with quote including images

Back to my question earlier last week, who is in charge or has access to the Mk1 Knowledge base? I think this article has enough merit to be added instead of it disappearing off list into the archives.
Back to top
User is offline 
stenky




Joined: 23 Mar 2011
Posts: 356
Location: Slovakia
Feedback Score: 2

1989 Toyota MR2 Mk1b

PostPosted: Sun Jan 20, 2013 8:18 pm    Post subject: Reply with quote Reply with quote including images

Looks like censorship>>expanding KB
I am sooo getting punished for this, but phuket [blackeye]
Back to top
User is offline 
elbon50




Joined: 12 Sep 2009
Posts: 3598
Location: Stafford
Feedback Score: 7



PostPosted: Sun Jan 20, 2013 8:30 pm    Post subject: Reply with quote Reply with quote including images

[email protected] wrote:
Back to my question earlier last week, who is in charge or has access to the Mk1 Knowledge base? I think this article has enough merit to be added instead of it disappearing off list into the archives.


I would suggest PMing Lauren or Chris (Limey) about that Paul
Back to top
User is offline 
cartledge_uk




Joined: 13 Nov 2005
Posts: 7608
Location: Newbury
Feedback Score: 6

1986 Toyota MR2 Mk1 SC

PostPosted: Mon Jan 21, 2013 9:04 pm    Post subject: Reply with quote Reply with quote including images

You can add it yourself paul

see this thread

http://www.imoc.co.uk/forums/viewtopic.php?t=76755

Or I can for you if you want [thumleft]
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
Goto page Previous  1, 2, 3, 4, 5, 6  Next
Page 2 of 6

 
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