t3 vs t2
Turbo Mini Forums

Hey team!

Im comming round to the idea of cutting a builkhead box and so I want to know the advantages/disadvantages of running a t2 instead of a t3.

Cheers

Craig

In very simple terms, less lag on a T2.

on the right manifold you wont have to cut the bulkhead for the T2.

one day boost will be mine!

so less lag on the t2, does the t3 give more power or does the t2? will I get higher bhp from the t2 on this particualr engine or will the t3 give better results?

Cheers

Again, in basic terms.. the idea of a turbo is to run the smallest you can get away with. You won't see a difference in power until one or the other runs out of puff, which neither a t3 or t2 will on the sensible side of 160hp, maybe more.

ive spent the last 5 months on here searching and reading about all the various options, and ive still not read no where near all of it lol. have a search you'll find every answer you need as your asking basic questions at the mo.

one day boost will be mine!

everytime I tried searching nothing comes up =/

I presume that you are talking Metro T3 V. R5 T2?

I would choose the T2 every time. But in reality there are far better turbos than either readily available.

If possible I would advise that you spend money having a manifold made to fit the turbo without affecting the bulkhead.

Read my sig for Fabs favorite quote.

Edited by wil_h on 25th May, 2011.

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

what do you want to do with the car if you want a car that anything over 2.5k rpm you are on boost then t2 is your best bet.
this lets you pull out of corner and have zero turbo lag. i have driven other cars with bigger turbos and the lag can be a right killer on the back roads i have always used a t2 on my mini and love it

defiantly makes for a very forgiving car if you’re not quite in the right gear for the corner.



as for searching search with key words not sentences

search things like

"t2 or t3"
"which turbo"

"Tuning should be a compromise between what is possible and what is necessary"

10)Thou shalt always quest for more power

I have no trouble pulling out of corners with my T3, I start to see bost at 3000rpm, but reach full boost at about 3,750rpm, , start to give it some boost just as your about to leave the corner, by the time you've straightened up, it spools up and get a kick in your arse.

Audi s4 b5 - 470bhp & 486ft lbs

On 30th Apr, 2012 Brett said:
yeah stick the bit in and give it a wobble

the t2

me and james used to have a play down country lanes, me in my td04 hybrid turbo running 240wbhp

and james running 120wbhp in his mini.

my starlet weighed 860kg, and had 250lb/ft torque

james would absolutely rinse me driving round town and through the lanes, not because of the mini handling, as i got the starlet to be not far off the mini for handling,

but the td04 wouldnt give me full boost till almost 4k, would have been closer to 3.5k if i had a decent map on it, and the cr wasnt 7.8:1

although on a straight or round a race track the starlet would have been the quicker,

so my advice would be to choose wisely, think about where your car will be spending most of it's time and tune it according to that

Edited by sx_turbo1 on 25th May, 2011.

The thing is that the T2 was a good, simple alternative 10 years ago. Now it as out of date as the T3. They are not easy to find in good repair either.

My advice, along with others in this thread, would be to look into a more modern turbo where the spool time and the potential power are better then the old T series turbos.

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.

What I think we need is 'sticky' of possible turbos that can be used with a Mini, so that everybody can use it as a reference

I myself would love to find out more about the modern turbos that could be used

Something like this (all hypothetical figures as I'm only guessing what the figures may be)

Model - Garrett T3
Vehicle - MG Metro Turbo
Possible PSI - 25
Approx RPM at start of boost - 3000
Approx RPM when full boost achieved - 4000
Possible BHP - up to 250
Manifolds available - Std MG Metro Turbo
Bulkhead modifications - Yes
Oil Cooled - Yes
Water Cooled - No
Internal or External Wastegate - Internal
Disadvantages - can be 'laggy' due to the old design and being a bit large
Advantages - after the bulk head modification the parts are readily available and fairly easy to fit

I'm sure you can see what I'm getting at

Perhaps one of the mods could administer it, while everybody else just PM'ed them with the details - this way it would save the thread becoming pages and pages long - it could be a permanently locked thread, so that it is kept to one post

Edited by ntm1275 on 25th May, 2011.

Unfortunatly there are far too many parameters that change the out come of the "turbo results" ; cc, compression ratio, cam used, runner lengths, engine timing etc etc etc.

We would all love a table like that but it's just not possible...

However, it might be nice to have a turbo guide with turbos potential bhp figures and suitability with certain cc's. That might make peoples choices a lot easier??

i totally agree there are and must be more modern turbos out there that would work as well if not better.

but this specific thread asked t3 v t2 and thats what i no as iv used a t2 for years.

for me its got to be t2 hands down up to the sort of power ur looking (150ish) it will make for a cracking town/twisties car with the right other bits done.

my latest turbo combines the best bits of t2 and t3 giving low kickin and lots of boost(thanks to kean and ct turbo who gave it a once over) as im going to be hopefully pushing to the 200 mark but should keep the lag none existent


if other turbos are on the cards quite a few people seem to be togin to the gt17(even mirage are making manifolds)

"Tuning should be a compromise between what is possible and what is necessary"

10)Thou shalt always quest for more power

Little question, what sort of boost does a standard t2 run out of puff? And what sort of power does it make compared to a t3 or the same boost?

Audi s4 b5 - 470bhp & 486ft lbs

On 30th Apr, 2012 Brett said:
yeah stick the bit in and give it a wobble

i was running a 8:1cr with 12psi at 120bhp at the wheels. as far as i no it runs out at about a bar so 15 ish but i never took it that far as i was running on a standard gearbox(x-pin of cause).

the hybred t2 one i now have should be good for 21+ and still kicking in at pritty much the same point.

"Tuning should be a compromise between what is possible and what is necessary"

10)Thou shalt always quest for more power

t2 is at its max at 15psi,

i'm also certain they run out of puff at about 6k

although the t2 can be hybridised into various specs,

when companies like cr turbo's hybrid turbo's they generally try and cram as much of the latest turbo innovations as they can into them,

Edited by sx_turbo1 on 26th May, 2011.

thats fantastic - thanks for all the replies guys

I don't want huge power out of the mini about 120-130bhp is enough, the reason I asked about t2 vs t3 was that I wanted to know which would be better for a general all round fast road car - i think I'll spend the extra money and go t2 with mirage manifolds - I have a friend who has a decent t2 spare anyway so its not much of a problem for me.

thank you for all your replies :)

Craig

This is a bit of a generalisation.

My experience is that much above 12psi and charge temps shoot up. But this was on a 998 and you may gain efficiency with slightly more flow.

Either way, good for 160 on a largebore, and 120 on a smallbore (roughly speaking). Perfect for what you want anyway.

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

how true is this!!!!! god dam it.

"Tuning should be a compromise between what is possible and what is necessary"

10)Thou shalt always quest for more power

aha yeah I know it is, when I want more power im going b18c4 vtec then turbo that :)