15 replies to this topic

[blister]

recently getting my mini back on the road after a incident i have managed to swap the old 998 for a 1275 and have now begun to turbo it just mocking up the intercooler pipes etc and it should be done

just thought i would share my experience with anyone else hoping to do the conversion!

so far the hardest part i have found was trying to get the turbo oil return pipe on! but its done now,

only things left to do is run the fuel pipes, plumb in the fuel regulator and finish off the IC pipes, oh and fit the oil cooler, and bleed valve, aswell as doing a little bit of tidyin up and painting


http://www.facebook....p;id=1470302398

[mini_mad69]

recently getting my mini back on the road after a incident i have managed to swap the old 998 for a 1275 and have now begun to turbo it just mocking up the intercooler pipes etc and it should be done

just thought i would share my experience with anyone else hoping to do the conversion!

so far the hardest part i have found was trying to get the turbo oil return pipe on! but its done now,

only things left to do is run the fuel pipes, plumb in the fuel regulator and finish off the IC pipes, oh and fit the oil cooler, and bleed valve, aswell as doing a little bit of tidyin up and painting


http://www.facebook....p;id=1470302398

Sounds good matey, but that link just brings up one picture of a centre speedo, and no other pictures. Do you have a link to the album?



Edit: I found it by looking at your profile, and found an album about your car. I see alot of pictures of a 16v head, are you turboing that?

Edited by mini_mad69, 05 February 2010 - 06:07 PM.

[blister]

http://www.facebook....mp;l=59103b3600 sorry try that link

i sold the 16v head long time ago

[In-a-mini]

looks tidy i see nos in there too. what you got inside the lump and gearbox?

[blister]

nos might be going on it all depends if the weight that it adds is does not out balance the power it gives as i want to only give a 50hp shot before things start going wrong as i have been instructed by the nytrex suppliers

the lump is a standard metro N/A engine! with a standard gearbox as when i decided what i want to do with the engine i can start from basics i.e 1293 avonbar engine or a promotive conversion

[rick.spi]

dont be turning the boost up too high if its a NA engine then. from what ive learnt the turbo's had different pistons to lower the comperession to let it boost safely.

tuning a turbo is a little oposite to a normal NA engine as you actually lower the compression rather than making it higher so that you can run more boost usually.

[Sam Walters]

Never worry about the engine block. the gearbox will go well before that.

[In-a-mini]

nah the turbo and n/a engines in standard form (same age) have the same compression ratios. if all is good and healthy with the engine 120bhp intercooled is reasonable.

[rick.spi]

nah the turbo and n/a engines in standard form (same age) have the same compression ratios. if all is good and healthy with the engine 120bhp intercooled is reasonable.

ah ok...

ill take your work on it haha

found this on turbomini's

So the next question, can I turbocharge my standard Metro 1300cc engine?

Well this is more tricky, yes and no.
The main point of concern is the pistons. The standard normally-aspirated pistons are not up to the spec of the turbo pistons. Therefore if retaining them for use in a turbo engine, boost levels must strictly be kept down, or else holed pistons are likely.
The cylinder head can be reused, although it is prefered to fit the turbo exhaust valves and guides with the larger stems. A number of people also use stainless race exhaust valves to good effect.
The other problem is that of Compression Ratio (CR). The CR of the Metro Turbo engine is 9.4:1. Although this is not large in normal terms, for a forced induction engine this is very high. Therefore it is desirable to reduce the CR where possible. Many people run a CR as low as 8.0:1 or less. CR can be lowered effectively by either enlarging the cylinder head chamber volume, or increasing the piston dish size. Of the two options, increasing head volume is easier, and can be done on your existing head.

so you may blow some holes in your pistons if the boost is not kept down...

Edited by rick.spi, 08 February 2010 - 07:43 PM.

[blister]

well i got a compression ratio of 9.3:1 using a modified turbo head from minispeed so i was only lookin to run about 10 psi does any one know how many bar this is?

[rick.spi]

best asking all this on turbominis.co.uk youll get some exellent turbo advice on there

[Turbo Phil]

10psi isn't even one bar, one bar is 14.7psi.

[blister]

10psi is limit for NA pistons as i learnt from the turbo mini forum

[Wil_h]

10psi is a suggested maximum rather than an absolute limit. No-one knows as they haven't tried using these pistons. It's not really boost that kills pistons mor the addition heat. they may well melt at 10psi, but I'm confident that they won't if a decent IC and ignition system is used.

[blister]

oh thats put my mind at rest think i will invest in a front mount radiator as my radiator atm is a standard 1275 and its going to get hot in there