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Home > Show Us Yours! > OMS CF09 TT4

Tom Fenton
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15231 Posts
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Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

&

TM legend.

Rotherham South Yorkshire

Interested to see your progress Wil, it must be really hard with so many variables to dial it in so it works for your driving style.


On 29th Nov, 2016 madmk1 said:


On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else


Like fuel 😂😂


jamestar

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488 Posts
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Senior Member

Devon

Nice work, I bet she goes some!


wil_h

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9240 Posts
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Betwix Harrogate and York

My driving style has always been brake late and chuck it in. Which works well with the monoshock at the front.

The difficult thing is realising how fast the thing can corner. Lots of variables yes, but like the mini you just take your time and make lots of notes.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


evolotion

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2907 Posts
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Glasgow, Scotland

I stripped a cheap ebay gt17 core down t'other day and it had a 180 degree thrust bearing!!!! in it. I know some cheapy stuff is fine and some junk just letting you know to keep an eye on it. the core it was replacing had foreign object damage on the compressor, so I reused the old thrust and journal bearings and the cars been fine. I didnt want to risk it with the shitty thrust bearing.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.


evolotion

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Glasgow, Scotland

p.s. keep us up to date, beautiful machine.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.


wil_h

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Betwix Harrogate and York

Finally getting somewhere with the OMS. It's now lighter, has new less draggy wings and a nice power graph.

This was running at 10psi according to the RR MAP sensor which we callibrated after as I thought it was wrong. Unfortunately, just as we were about to strat mapping the boost the turbo-return scavange pump shat the bed. The magic 200 bananas seems easily achievable with a couple more psi.



Next thing is a test day, if the terminal speeds are where I wnat them the boost will stay as it ism if not it'll get a tweak:)

Edited by wil_h on 7th Apr, 2017.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Hoops

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Huddersfield

Nice piece of kit 🚗


Rob Gavin

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Glasgow

very achievable given what you've still got to play with


wil_h

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Betwix Harrogate and York

Here's a cool video 360 of the test day. works really well on a phone.

https://www.youtube.com/watch?v=0Z9Gz2pb3UI

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Yo-Han

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North of the Netherlands

That is very cool!
What did you use for filming?

Nice run too

Dazed and Confused....


wil_h

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Betwix Harrogate and York

It's a Ricoh Theta S. Easy to use but a bugger to edit and process to make it work.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


fastcarl

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6954 Posts
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Fastest A Series Mini in the World

leeds/wakefield.

Honestly will, I can see why you're struggling with the car, looking at that vid the rear wheel have far to much neg camber and are toeing out a fuck load,

also there appears to be two people driving which won't help.

carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE


minimole23

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Bristol

That looks seriously rapid

On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding


wil_h

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9240 Posts
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Betwix Harrogate and York

Very good.

I had to explain to my Dad that the video wouldn't work if using Microsoft IE.


On 9th Apr, 2017 fastcarl said:
Honestly will, I can see why you're struggling with the car, looking at that vid the rear wheel have far to much neg camber and are toeing out a fuck load,

also there appears to be two people driving which won't help.

carl

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


apbellamy

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16537 Posts
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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

Nice idea, but I've got a stiff neck from whatching the vide over my left shoulder so I could see where you are going. *wink*

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


wil_h

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Betwix Harrogate and York

A small update just for fun.

I got the car back on the RR last week. The idea was to finish the mapping we started and then play with the boost.

With the boost now increased to 1.25bar it's making over 200 bananas ATW. The RR I use is frequented by lots of my competitors, so it's a comparable figure to the 1100cc bike engines making 190.

It also has over 110 toques, again comparable to the 85 the 1100s make.

Unfortunately, an accidental overboost bust the ringlands on No4. No other damage. Worth noting that the power run was taken with the bust ringlands and only to 10,000 rpm, 1000 below max rpm.

Her's some 360 videos from Doune - A fantastic hill.

me
https://www.youtube.com/watch?v=fEn4ZHZw5r4

Ben
https://www.youtube.com/watch?v=SmIKKdQU8cw


Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Mr Joshua

2299 Posts
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Post Whore

Luton Bedfordshire

Totally wicked😃

Own the day


gr4h4m

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Chester

man that looks scary...

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


wil_h

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9240 Posts
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Betwix Harrogate and York



On 29th Jun, 2018 gr4h4m said:
man that looks scary...


It sort of is scary. But I urge you all to go and drive it. It's the most rewarding hill to drive in the country.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


AlexB
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6224 Posts
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The boring bloke who runs this place.

Tadley, Hampshire

I like the 360 videos!

Shame about the piston damage. hope it was easy to sort.

Currently mini-less :(


wil_h

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9240 Posts
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Betwix Harrogate and York

Car is all back and running now. So we'll be back out next weekend.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


graemec

917 Posts
Member #: 1424
Post Whore

Carnforth, Lancs

Looking forward to seeing it at Barbon


wil_h

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9240 Posts
Member #: 123
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Betwix Harrogate and York

Work progresses on the OMS. Over the winter we have made it lighter, reduced the drag, lowered the engine 32mm and put a new manifold on; plus lots of other minor changes.

Hopefully this will all translate to better times, we were really making progress last year.

Now looks like this, just needs some decals adding.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


wil_h

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9240 Posts
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Post Whore

Betwix Harrogate and York

The problem we have is the power. We changed from a really bodged up 'log' type manifold to a nice equal length jobbie. Like below



and the power changed like this - Black is with the new manifold, Red with the old (note this is transposed from a print-out, so not no comments on some odd bits)



What I'm after is thoughts on why the power seems to suddenly drop off at 9500 rpm. It's clearly spooling the turbo up earlier and making more low down torque, but not sure why it suddenly falls away. Thinking about manifold header lengths having a similar effect to a cam change????

For information, following this session at a test day the engine lunched itsself. The failure was cased by a sticking exhaust valve. Could a sticky/leaky exhaust valve cause such a drop?

Feel free to think out loud........

Edited by wil_h on 26th Mar, 2019.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


John

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Topping Geezer

Barnsley, South Flatcapshire

Looking good Wil! Was just thinking about this other day as was talking about the TT3! Do you still compete in that too?

If something is worth doing, it's worth doing half of.

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