to T3 or not to T3
Turbo Mini Forums

Been playing with turbo ideas again and foudn this site:

http://www.squirrelpf.com/turbocalc/

So for the lastest engine I am building I plumbed in the data and chose two turbos...





Not alot in it from the compressor maps it would seem!

Alex

AlexF

interesting, threw in a few figs for an optimistic 150 banana 998 and got these:

http://www.squirrelpf.com/turbocalc/graph....7&product_id=19

http://www.squirrelpf.com/turbocalc/graph....7&product_id=20

http://www.squirrelpf.com/turbocalc/graph....7&product_id=75


looks like the old T3 isnt too bad a choice

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

I'm struggling to get any sensible answers from that calculator.

Just like Joeys 150hp 998 from 0.8 Bar boost !

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."

The compressor map isnt the be all and end all - its just suitability if you like.

Would be intresting to run the same engine up on both turbos and see!

Alex

AlexF

Are the racer or glitter car making a come back?

i need to use a bsfc of 0.5 on that site to get the numbers anywhere near right :) so have a play wiht some known results and your own engine then play from there :)
good site !

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

This round of turbo selection is for a customers mini - the glittery runs a t3 with a 0.63 housing and the racer hasnt got an engine!

AlexF

Yes the T3 looks perfect for the 998, and it made good power when we used one. But the inertia was massive, which killed drivability. fine for a drag car, rubbish for anything else.

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

AlexF

Ok found a gt20 turbine map


So now I need one for a t3 and the calcualtions for what exh flow an a-series might produce.

Alex

AlexF

All you need to know is on TM:

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 found that after my previous post...

Good reading.

I still need to know what real world EGTs people see on an A-series and a turbine map for a t3 with a 0.25 exh AR.

Then we can look at what will boost when etc

AlexF

hows the racer coming along then? you still pushing ahead with this?

Team Racing

I measured EGT at 700 Deg C on the outers and 800 Deg C on the inners, so that is why i used those figures in my calcs.

I doubt that you will find a turbine curve for the original T3 turbine.

I'm not sure why you are pursuing the T3, other than it is a simple fix.

Just look at the cars with the highest State of Tune at the RR day. They were running GT turbos.

I think that I can safely say that anyone who has upgraded to a GT from the T3 has not regretted it.

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 have ports to measure EGTs by have never got round to it on my mini. So around 700-800 at the turbo?

Well I currently have 2 different GT turbos and 2 T3s to play with...

On my car I don't mind trail and error - on a customers car I perfer to know what will and wont work first. Or at least to have a good idea!

The other reason for still bothering with a T3 is that if you look towards 300bhp then you will struggle to find a compressor map that isnt going to surge its tits off - not that I have a 300bhp engine in the wings or anything, just as a theory exercise lol

Alex

AlexF

AlexF

Edited by Paul S on 9th Dec, 2009.

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."

um ,chaps , surge is on the left side of the map, overheating and overspeed choke is on the right .

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

On 9th Dec, 2009 robert said:
um ,chaps , surge is on the left side of the map, overheating and overspeed choke is on the right .

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."

Thats what I thought too Paul.

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

ah my mistake , i thought he was saying that as it got towards 300 bhp power output it would start to surge .. i must have misread it .
in reality , you would only get surge from a 300 bhp map , if you sized the a/r of the turbine housing too small to avoid it .

Edited by robert on 9th Dec, 2009.

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