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PostPosted: Mon May 20, 2013 9:25 pm 
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Late bump for this thread - I've been doing a lot of R&D for my own project recently and naturally Jonny's ST205 Sprint is a wealth of inspiration and technical development, so whilst hunting around the Internet for articles about it I found that it had been featured in Redline's October 2008 issue. I then dug some more and found a full 45MB PDF of that issue. I did try to order a back issue, but Redline being dead and gone now means that you can apparently no longer do that. A PDF is even better for adding info to the technical forum here anyway - I'm only posting the article relevant to this thread but if anyone wants the full issue I'll upload it to my own server and post the download link to it as well.

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Hope this is helpful for someone in the future :)

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Currently planning an ST205 track & weekend build


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PostPosted: Mon May 20, 2013 9:55 pm 
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Yep definitely interested in having a read of this, if you could UL and supply a link?

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www.GT4-Play.co.uk


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PostPosted: Mon May 20, 2013 10:59 pm 
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I would love to be able to afford a MakTrak transmission for my track toy!

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1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2012 Van Diemen JL12 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp


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PostPosted: Mon May 20, 2013 11:08 pm 
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No problem Steve, here's the link, right click and "save as" to download it. I'm uploading it to my own server because the sharing service I downloaded it from earlier was restriced to a very slow speed. This server should be faster. There are a couple of other good articles in this issue - a very brief one on twin charging and a write up on a nice V8 S14 :)

http://unicornsystems.co.uk/magazines/r ... 011-10.pdf

TrackToyFour wrote:
I would love to be able to afford a MakTrak transmission for my track toy!


Same here, although what a paddle shifted sequential would be like on public roads I have no idea...

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Matt
Currently planning an ST205 track & weekend build


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PostPosted: Tue May 21, 2013 7:12 am 
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Location: Wellington, New Zealand
Car Model: ST185
Thanks for the magazine link. Looking forward to reading the article :)

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PostPosted: Mon Jun 10, 2013 8:56 pm 
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What is the modified group A rear subframe? How is it different? Also how comes this block despite bored 1mm oversized can still handle so much power?


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PostPosted: Mon Jun 10, 2013 9:23 pm 
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Car Model: ST205
Quote:
Also how comes this block despite bored 1mm oversized can still handle so much power

TTE block?

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95 ST205 - slept for 10 years, now waking up...
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Turbocharging - the replacement for displacement


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PostPosted: Mon Jun 10, 2013 10:08 pm 
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Location: Camberley, Surrey
Car Model: ST205
Corolla WRC Block looking back at the earlier posts.

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PostPosted: Tue Jun 11, 2013 12:32 am 
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yellowchinaman wrote:
What is the modified group A rear subframe? How is it different?
The Group A subframe is a tubular steel item.

TTE ST185 rear subframe shown below

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Don
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1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2012 Van Diemen JL12 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp


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PostPosted: Wed Jun 12, 2013 10:09 am 
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So what are the benefits of having a tubular rear sub frame? Just weight reduction?
Also how does the Corolla WRC block compare to the Rev 4 3SGTE block from a Caldina?


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PostPosted: Wed Jun 12, 2013 1:01 pm 
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Car Model: ST205
At a guess in descending order

Correct mounting points for xtrac diff
Correction of rear roll center
Additional stiffness
Removal of rubber subframe mountings
Correct mountings for rose jointed suspension arms
Weight reduction


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PostPosted: Wed Jun 12, 2013 4:49 pm 
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yellowchinaman wrote:
....Also how does the Corolla WRC block compare to the Rev 4 3SGTE block from a Caldina?

The Corolla WRC used two different types of engine. The early versions used the TTE block which allegedly has thicker cylinder walls and a reduced deck height. The TTE con rods are the same length as the production 3S-GTE rods. The shorter deck was accomodated by bespoke Mahle forged pistons. The later Corolla WRC's used a Lexus based engine with BEAMS/VVTI. They don't relate directly to any road car engine.

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GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2012 Van Diemen JL12 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp


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PostPosted: Wed Jun 12, 2013 6:08 pm 
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I see. So when you say correction of diffs and rose joints, how so? I didnt think they needed correcting? So the TTE block was never a production block so we really dont know how the rev4 compares to it in terms of strength?


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PostPosted: Wed Jun 12, 2013 8:29 pm 
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The cars ran a different drivetrain and suspension setup to stock which would have required different mounting points

Block wise I don't expect there is much in it. I would expect that Caldina blocks might be a bit weedier but this could easily be offset by improved quality


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PostPosted: Thu Jun 13, 2013 10:30 am 
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Now looking at the xtrac rally diffs. Do we know which model JM had?


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