GT12
Turbo Mini Forums

I've been recommended GT15's for my 998cc turbo build. But has anyone seen/tried a GT12? It is advertised as being from a Smart Car - .

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...ssPageName=WDVW

*edit* Ah I found it on the TurboMaster site, it appears to be for a 600 cc engine - too small is my guess (?)

Edited by snowfruit on 27th Jun, 2005.

http://mini.twisted-design.net/blog/

Excellent for motorcycles or small engines. GT12 supports up to 130 HP. GT15 supports up to 220 HP. Comes internally wastegated.
As taken from: http://turbocalculator.com/sale-garrett-gt.php

http://mini.twisted-design.net/blog/

The GT12 is a bit small for us. It only flows up to about 12 lbs/min.

Plus it does not have the T2/T3 flange.

GT 15 looks OK but a bit big for a 998.

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."

Thanks Axel.
The other option that was recommended is an IHI RHB5 (or possibly the 32?) any opinions on that?

btw. If a turbo doesn't have a T2/3 flange can;t it be adapted?

Edited by snowfruit on 28th Jun, 2005.

http://mini.twisted-design.net/blog/

The IHI seems to be popular, but I cannot find a compressor map for it, neither the T2 for that matter.

I think they fit the IHI to the Diahatsu Charade.

I'm still very much at the theory stage, although I think the wife will let me put a Turbo engine in her 35!

I am collection as much technical infomation as I can before I start spending money.

Have you done you air flow calcs yet?

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."

I'm trying to figure out what/how the hell to perform any of these calculations to best match my engine :p
Any helpful links in your search?

http://mini.twisted-design.net/blog/

Try this:

http://www.turbofast.com.au/tfcalc.html

Have you read the Hugh McInnes book? All the formulea used by Ray Hall are in the book.

I have developed a spreadsheet that gives the same answers if you are interested.

PM me you email address and I can send you a copy.

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."

Is there any reason no one here appears to have used a KKK turbo? some of them seem to be small enough to use on a mini i.e. 1.4 / 1.6 cc applications

http://mini.twisted-design.net/blog/

Because rather than trawl through internet turbo sites for hours, we use what we know works from other people using it, e.g. T3 as it bolts straight on but it a tad large, or T2 as its a fairly straightforward conversion not requiring a great deal of hard work to do, and it gives less turbo lag. That is on a 1275cc engine. As for some reason you are intent on using a 998 engine as a base, look at what other people with 998 turbo minis are using. And that is people WITH 998 turbominis, not those people planning 998 turbominis, as plenty of good plans heard on this forum never come to fruition. That is not having a go at anyone, but I am sure there are plenty of people using this forum who have seen various peoples plans to do this that and the other exotic conversion in the past, and then after asking us endless questions, they disappear never to be seen again.

WilH has the most developed 998cc turbomini on this board, producing power to rival many of the 1300cc turbominis. He uses a T2 to great effect. Take the hint and learn from other peoples experience and make your life easy, by allowing you to use a stock T3 exhaust manifold and an adaptor plate available from Jimster, and an oil feed pipe available from Iain.

wise words there tom

I didn't know wil ran a t2, I though he was using a t3?

Team Racing

I could well be wrong then, I thought it was a T2 but could well be a T3.

But the point I was trying to make is still the same!

yea, 100% right tom

Team Racing

Yep we do use a T3, but mainly because it was easy and cheap. The next engine will run a T2. Can't tell you how well that is going to work on a 998, but looking at how it improves the drivability of 1300s it seems like a better option.

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.

Yep, T3 too big for 998.

Personally I thought for a long time that it was ok, but our low gearing and only-ever-flat-out-use hid the real boost threshold of 4000rpm which we rarely drop below.

Fine for us but useless for the road.

In any case, as above we're changing to a T2.

Any one got one for sale?

Wil

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

go with a T2, i got a turbo from an RX7 for free so i decided to use it, to be honest......... i regret it, i'v had to make all sort's of adapting plates and bracket's as well as an exhaust manifold from scratch, i'v still got a dump pipe and a custom turbo box for the firewall to go :( Once it's all finished it "should" work....... it might not, go with what work's.

998 turbo