turbo large bore engines
Turbo Mini Forums

this question my come up lots of time so im sorry im asking but, i have a 1340 stage 3 engine, which is quick but, a friend of mine has a standerd metro turbo mini and his is quicker! so i was wondering if its possible to fit a turbo to my 1340? i would geuss i would need to lower the compression ratio but im not sure by how much? also would i be better doing the work and fitting a T2 tubro or just bang on the T3 on the metro tubro manifold? what other mods would be needed to be made to the engine other than some head work? thanks Alex1340, just joined.

Hello and welcome....

your current engine is unlikly to a good base for turbocharging... it will be high CR with a long duration cam, the oppsite of what you need!

It would probably be best to get a turbo engine and start with that! There not much difference in price between buying the turbo parts and a whole turbo engine.

T3's work well as do t2's... it depends on what you want from the engine as to which you should use.

As std. the metro engine is 94bhp when new.

Alex

AlexF

hi again, what problem would i come across if i cut the bulk head out? does the heater need to be moved? whats the best tool for the job? whats the advange of using a T2 over the T3, i've look at the mirrage kit is it any good? or does the bluck head still need to be cut really? thanks Alex 1340

Ok with the mirage kit no mods are required to the bulk head in order to accomidate the turbo.

If you cut the bulkhead you will need to add the heater brackets to the back of the bulk head box once fitted. If you want to keep the heater

I can say for sure that you don't have to chop your bulkhead with our manifold kit.

Do you have a better break down of your engine spec, it may be ok to turbo.

yeah the full engine spec is,
bore out to 1340cc, fully lighten and balance flywheel and crank, the crank is a turbo crank which has also been cross drilled wedge and all the rest,heoplite pistons, kent 286 cam and a phase 3 MED head. brand new gearbox with a metro turbo 4 pin diff and central oil pick up, i think thats most of it. im not sure on the commpression ratio, i was though on a large bore engine the commpresstion from the tubro should be lower, i was think about running it at about 8psi max. thanks Alex1340.

hi again, whats the mirage web site address? thanks alex1340.

Edited by Jimster on 16th Dec, 2003.

Team Racing

cheers

Few more questions,

what are the pistons ? dished ? dish volume ?? i'm presuming it's a standard stroke with 73.5mm bores.

IF you keep the boost levels down and don't thrash it to death you should be ok. Bottom end, crank etc will be fine.

I'd say a C/R of around 8.5 would be ok if you intend to go no more than the 8lbs. One problem with larger displacement motors is getting the C/R low enough due to the larger swept volume. This means that you have to have a larger combustion chamber volume, either in head or pistons. Depending on your pistons you may need a new set. To be honest if you do, i'd get hold of a block and go for a smaller bore. Then build it up with all the bits swapped from your other engine.

You should be able to get the combustion chambers on your MED head enlarged to lower compression.

Rich.

the pistons are slitly dish but not buy much, i would preffer to have the head work done to changing the bore size. what cars had the t2 turbo on? or is it better to fine a turbo recon compainy and buy one from them? thanks alex1340

T2s are on Renualt 5 GTTs, Fiesta RSTs and a few other odd applications like volvo and saab.

Rich,

if the bore size is 73.5 and a std crank, it'll be a 1380... won't it?

with 8.8:1 you should be able to run more than 8psi... the std setup allows 7psi. I'd of thought more like 10-12 psi depending on intercooler etc.


Alex

AlexF

would a metro turbo engine, with the mirage kit and a t2 turbo fit in to a mini marcos engine bay? or does the blulk head need cutting? im looking to buy a marcos and i would like to fit a turbo engine to give it some mega kick, but becasue it is fiber glass i don't want to loss any strenght from the shell. any one here got a marcos? thanks Alex1340

I know someone whos got a macros with a turbo engine (t3) it's a tight fit, and he had to cut the bulkhead

Team Racing

I agree Intercooler design is VERY important...

Its all that controls ACTs unless you get into the relms of hybrid turbos :p


alex

AlexF

Hi all again, right disaster has hit my 1340 has blown another head gasket, I have been to MED and there is a worry that the block mite be crack.. eekk. If it is I would like to build an engine with the idea of fitting the mirage kit with a t2 turbo what sort of spec should I go for do you think? I want to use the crank I have because of all the work that was done to it. thanks Alex

Hey alex its arron
if ya gunna be buildin a new engine ill buy ya head off ya??
cheers m8

Just think twice about buying an engine from MED, I had one, it was a bag of shit!

Team Racing

what spec is your crank?

alex

AlexF