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Home > General Chat > t3 on a 998???

masterchief

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Devon

well basically as title will it work? i have a few bits kicing about such as a 12g295, plenham and a complete t3 but would it be worth putting it on such a small engine?

any input welcome


John

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Mongo

Barnsley, South Flatcapshire

It will work, but an educated guess tells me that it may as well be N/A until you hit over 5000rpm.

I guess you could always keep the compression high and the boost low to give it a bit of a power hike at high rpm's?

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


Carl S
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1927 Posts
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Stalker

Bristol

Unless your hillclimbing or sprinting it, don't bother with a T3.


masterchief

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Devon

see thats what im thinking, anyone know what revs it may kick in at for sure then?


John

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Mongo

Barnsley, South Flatcapshire

I believe the best qualified people to comment with be wil & ben. I'm not certain but I think they used a T3 on their hillclimber.

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


Ben H

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Melton Mowbray, Pie Country

We did use a T3 on the hillclimber and I would not advise it on a road car. The power came in with such a bang and at such high revs that it was not great.

I am sure Wil has a print of the power graph somwhere, but not much below 4k and then all done by 6k. This could be improved, but we decided that a different turbo was a better place to start development.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.


GaryOS

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Formally spanner181187

Dublin, Ireland

Here is a RR comparison of the T3, T2 and GT1752 on the twins hillclimber

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=164482

On 12th Nov, 2009 Paul S said:

I think Gary OS has taken over my role as the forum smart arse *happy*


On 30th Apr, 2010 Rod S said:
Gary's description is best


wil_h

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Betwix Harrogate and York

It actually looks on that graph that the T3 and GT17 are comparable in boost threshold, but the T3 was a lot worse to drive.

Also the T2 on that graph was improved massively by modofing the exhaust elbow and manifold.

I would not recommend fitting a T3 or a GT17 for roaduse on a 998 other than for a laugh.

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



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.


sturgeo

857 Posts
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Northants

Hmm we were considering putting the gt17 on the efi 998 to replace the t2.

I guess we won't know what it's like on a road going car until we try...


dan187

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Wootton Bassett

Wil..


On 6th Apr, 2010 wil_h said:


Also the T2 on that graph was improved massively by modofing the exhaust elbow and manifold.


and it says in the linked thread you changed the adapter plate.

Could you explain what the mods were that gave you better output?

Cheers

1275 N/A Sprite, 998 T2 Turbo Mayfair
1275 EFi Turbo


wil_h

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Betwix Harrogate and York

I had blended the adapter plate to the shape of the Metro manifold, but this leaves it very narrow on the two outside bores.

I basically took a grinder to the seperators in the manifold to open it all out.

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



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.


Paul S

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Formerly Axel

Podland


On 6th Apr, 2010 sturgeo said:
Hmm we were considering putting the gt17 on the efi 998 to replace the t2.

I guess we won't know what it's like on a road going car until we try...


That's not right. We are going to fit a GT1752 on the 998 at the next build. Better head and piston buttons so that we can run higher revs get more power, but keep the torque at 105 curleys so that we don't destroy the helical box or verto clutch.

It will make aninteresting comparison.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


robert

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uranus

i think i ran around 115 to 125 lb/ft for ages with no probs paul.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM


Paul S

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Formerly Axel

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On 7th Apr, 2010 robert said:
i think i ran around 115 to 125 lb/ft for ages with no probs paul.


True, I would need to uprate the clutch though.

I think that I may have to find a hybrid or try a GT1548. Looking at the RR graphs for the TT2, it comes on full boost at 4500rpm, whereas we are currently seeing full boost by 4000rpm with the T2. Even if I push the rev limit to 7000rpm, I will only get another 500 useable rpm on full boost.

I could do with the GT1752 compressor on a T2 turbine.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


wil_h

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Betwix Harrogate and York

I have a feeling that if you stuck the T2 turbine on the 17 comp then you'd run into surge.

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



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.

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