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Answeredrobk's MR2 Turbo

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stuka
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Re: robk's MR2 Turbo 2017/10/03 11:37:49 (permalink)
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looks like great fun Rob!
Nik_Lee
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Re: robk's MR2 Turbo 2017/10/03 12:56:55 (permalink)
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robk
The roll racing on Friday night was really fun!
I won 8 races in a row, before finally losing to the 'Koval' Evo which is one of the big guns in the regular roll racing events. After Koval beat me, he then lost to the BYP700 Honda K24 turbo powered white SW20, which ended up finishing in 2nd place overall.
I also plan on joining some mates at Sydney Dragway on Oct 11, to try and set a new 1/4 mile PB.
I'm going to try to source a clutch switch and set up flat-shift before then, so I can save a few tenths on each gear change.




BYP's car is going well but I am also looking forward to seeing what Lockie's latest iteration performs like, from what he has said he has done I think it will be one to watch in the role racing and at Coota.

Current ride, 2010 TT RS
Previous ride, 1994 JDM MR2 Turbo hardtop
http://www.mr2australia.c..r2play/tm.aspx?m=105959
 
robk
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Re: robk's MR2 Turbo 2017/10/03 13:17:38 (permalink)
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Nik_Lee
robk
The roll racing on Friday night was really fun!
I won 8 races in a row, before finally losing to the 'Koval' Evo which is one of the big guns in the regular roll racing events. After Koval beat me, he then lost to the BYP700 Honda K24 turbo powered white SW20, which ended up finishing in 2nd place overall.
I also plan on joining some mates at Sydney Dragway on Oct 11, to try and set a new 1/4 mile PB.
I'm going to try to source a clutch switch and set up flat-shift before then, so I can save a few tenths on each gear change.



BYP's car is going well but I am also looking forward to seeing what Lockie's latest iteration performs like, from what he has said he has done I think it will be one to watch in the role racing and at Coota.

Yeah I'm keen to see Lockie's car out there again too!

There is an extensive build thread for my car here: http://www.mr2australia.com/mr2play/tm.aspx?m=18316

robk
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Re: robk's MR2 Turbo 2017/10/06 09:43:59 (permalink)
+1 (1)
I finished installing a clutch switch last night, so flat-shift is ready to go!
I actually used another brake light switch (they have the same thread to screw into the bracket on the pedal).
 
If you don't know how flat-shift works, it's a feature in aftermarket ECUs whereby fuel and/or spark is cut whenever the clutch is depressed while at wide-open throttle at high RPM.
It means that you can change gears by using the clutch only, with the accelerator pedal held flat to the floor the whole time. This also means that you can't stuff up the timing of depressing and releasing the clutch and accelerator pedals when trying to shift as quickly as possible.
The main benefit is that in a turbo car, flat-shifting eliminates the issue of the turbo compressor wheel getting slowed down when the throttle snaps shut during a normal gear change, so after the gear change you can be back on full boost with virtually no delay.
The downside is that it puts more stress on the synchros in the transmission.
post edited by robk - 2017/10/06 09:50:41

There is an extensive build thread for my car here: http://www.mr2australia.com/mr2play/tm.aspx?m=18316
Eric
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Re: robk's MR2 Turbo 2017/10/06 11:26:43 (permalink)
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the other benefit is that it sounds fantastic!

1990 SW20 Hardtop - Supercharged 2GR-FZE
EssDub
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Re: robk's MR2 Turbo 2017/10/06 14:00:06 (permalink)
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A missed shift will ruin your transmission.  As strong as they are, even an E-series box doesn't deal with ham-fisted changes well at all...
 
 

Currently...
'03 Spyder 6MT - T28 inc...
------------------------------
Previously...
'00 FD3S
'94 SW20 Bathurst R
'88 AW11
'92 SW20 G-Limited
'90 SW20 G
'91 SW20 Mongrel
'94 G Limited T-Bar
'92 GT-S Turbo 
 
 

robk
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Re: robk's MR2 Turbo 2017/10/06 14:32:00 (permalink)
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My transmission is already very worn out from lots of track days and drag racing, so it doesn't feel very good on the street anymore, but I've got to a point where I'm used to it so I don't stress about it as much now. I was going to rebuild or replace the transmission ages ago, but I decided to hold off for now because it'll just get worn out again anyway (at least while I'm still attending track days and drags). If it does happen to fail in a more serious way, then that'll be an excuse to rebuild or replace it immediately.

There is an extensive build thread for my car here: http://www.mr2australia.com/mr2play/tm.aspx?m=18316
Nik_Lee
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Re: robk's MR2 Turbo 2017/10/09 14:28:07 (permalink)
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Maybe follow in Lockies footsteps with what he has now done transmission wise.

Current ride, 2010 TT RS
Previous ride, 1994 JDM MR2 Turbo hardtop
http://www.mr2australia.c..r2play/tm.aspx?m=105959
 
robk
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Re: robk's MR2 Turbo 2017/10/18 17:03:49 (permalink)
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Well, sure enough, my gearbox did fail at the drags!
To avoid paying for a tow truck, I drove almost 30km from Sydney Dragway to Advance Motor Mechanics with only 1st and 2nd gear working.
As annoying as it is, it was really only a matter of time (I could tell because the gearbox had felt really crap for ages), and apart from the repair cost I'm actually really excited to finally have a gearbox that feels good again.
Lockie had a spare gearbox in really good condition, and he's a good friend of the guys at Advance Motor Mechanics, so I decided to get them to swap that complete box into my car (with my Quaife LSD swapped into it first).
 
Nik_Lee
Maybe follow in Lockies footsteps with what he has now done transmission wise.

I had a good chat to him when I picked up his spare gearbox, and when I found out the enormous amount that he spent on his new gearbox setup, it then became apparent that something similar would be completely out of the question for me at this stage haha.
Since my car is still a street car first and foremost, I've always been against the idea of having straight-cut gears (due to the loud whining noise), or dog engagement instead of synchros (due to the abruptness and loud clunking noise on each gear change).
After my gearbox failed this time, I did start to seriously reconsider, because a dog engagement gearbox would eliminate the synchro issues. I was starting to become OK with the idea of an aftermarket gear set for this reason, but in the end I decided that I didn't want to spend that much right now, and I knew that it would result in having my car off the road for much longer than I'm willing to accept at the moment.
If I can come to accept the cost of an aftermarket gear set, then I could maybe look at doing that with my broken gearbox, while I continue driving around with the replacement OEM gearbox for now.
Yesterday I was made aware (via the Hux Racing fb page) that 'Liberty Gears' (in the US) are able to modify the stock gears to convert them to suit dog engagement instead of synchro engagement. As far as I understand, they chop off part of the stock gears and weld a new part onto each gear for dog engagement, and they provide their own sleeves and forks to complete the conversion. That could be another option, but I would have to do some research to see if anyone has had any reliability issues with them.

There is an extensive build thread for my car here: http://www.mr2australia.com/mr2play/tm.aspx?m=18316
Falcon
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Re: robk's MR2 Turbo 2017/10/19 13:35:29 (permalink)
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Rob. Have you looked into the possibility of buying a brand new E153?
Mandalay did this a few years ago and I don't think it was all that expensive.
Problem we all face is that these old cars are worth bugger all compared to the cost of maintaining them.
I doubt any of us has ever driven a brand new one and they have certainly proved to be robust in handling a bloody lot of torque even when old and buggered.  You could only justify doing this if you were intending to keep the car long term.
Mrskylighter
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Re: robk's MR2 Turbo 2017/10/19 13:43:26 (permalink)
robk
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Re: robk's MR2 Turbo 2017/10/19 15:11:40 (permalink)
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The idea of buying a brand new OEM e153 was already thrown around in this thread when I started complaining about my gearbox a few years ago, and back then I gave it some serious consideration, but it's no longer an option that I'll ever re-consider.
The used box that is going into my car now, appears to be in very good condition, and when I get the car back I'm confident that I'm going to be very happy with how it feels for regular driving.
However, I've come to realise that if I want to retain an OEM e153, then I either have to shift slower than I'd like to at high RPM, or accept a lot of synchro wear.

There is an extensive build thread for my car here: http://www.mr2australia.com/mr2play/tm.aspx?m=18316
Admin
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Re: robk's MR2 Turbo 2017/10/19 17:14:22 (permalink)
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I have a stock E153 and I shift VERY fast, so you don't need anything fancy. I have upgraded joints at the shifter end and brass bushes at the gearbox end. The shifter is an ebay short shifter.
My clutch plate is 4 Puck and the pressure plate is upgraded stock. The clutch feels like a stock road clutch I.e not button

Mr Glengineering.
Please visit my other forums - 
www.celica.org.au
www.classic-ford.org
 
 
My build thread - https://www.mr2australia..m/mr2play/FindPost/47893
Phiz
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Re: robk's MR2 Turbo 2017/10/21 09:58:51 (permalink)
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Rob, adavanced motor mechanics at yenora?
robk
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Re: robk's MR2 Turbo 2017/10/21 16:50:28 (permalink)
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Phiz
Rob, adavanced motor mechanics at yenora?

Nah, different place.
Advance Motor Mechanics in Strathfield South.

There is an extensive build thread for my car here: http://www.mr2australia.com/mr2play/tm.aspx?m=18316
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