(G) Safe psi on uno turbo

Whats a safe psi to run on my mk1 uno turbo?

Its standard apart from a 2nd intercooler, filter, full stainless and dumpvalve.

Thanks in advance

Rob

0.6 Bar till you have sorted out the fuelling. At higher boost it will run lean.

The engines (1.3 and 1.4) were both designed to run 1.0Bar (14.7 Psi) but were turned down to 0.75 (Hence the 0.75BAR overboost switch) due to the press crashing them when launched!
or so i heard anyway!

thats interesting, i knew the mk2 was blueprinted for 1bar

There are lots of rumors, but they are just that, rumors not facts.

Uno turbos will run safely up to 1.0 bar boost. The boost will drop off at high rpm if using a normal style boost controller.

If it's a MK2 just disconnect the overboost sensor located at the top left hand side of the engine it's just two wires tape them up and away you go..

EDIT: Just read it's a MK1 not sure if they are the same

Well i know that on my old mk2 turbo, when i used to put a NAIL (This was when i bought it and i knew **** all about uno turbos) in the vacuum pipe to the ECU.

This somehow made the turbo spin to 2.1-BAR but i think it might have been todo with the bleed-valve.

But ****ing hell did it go!!!!!!
But it made a 1.5inch crack from the wastegate!
So only run 0.4BAR again but bought a new housing (£80) then out it on but never boosted up properly again, got fired from my job so couldnt afford it so i stripped it down to a bare shell!

But somehow the engine NEVER EVER missed a beat.
I cant wait to get my new one!

Yeah they use the same system

Cheers for confirming that i'll whack a picture up for reference later..

Where do you put a boost tap on a Mrk1 UT?

I wanna wind the boost up a bit on my UT but only now and then for a little fun, but leave it down low or perhaps practically off boost for daily driving.

oh dear
fueling needs sorting or you will either under fuel or overfuel which is not good for the health of the engine
and thats only to 1.0 bar. after that the head gasket will not tolerate high boost long. it needs modifying

On the actuator line.

Hmmmmmmm mixed messages. Some people say it's safe to 1.0bar beofre fuel and some say it's not. Make up your mind people!!!!!!!

My one has an aftermarket fuel pump of some sort on it anyways, cause it don't fit the original bracket very well and is partially cable tied to the body

Standard fuel pump is fine for a lot more power.

Up to 1.0 bar is fine on standard turbo

I think those fuel-pump cable ties are a safety 'feature' fitted by The Italian Job (Auckland FIAT service centre) since my car had them too, even though the mounts were fine.

I turned up the boost on my Mk1 some time ago, it runs absolutely great at 1bar. Steve is right of course, the ECU is mapped that far (take a look at the graphs in a Haynes Uno manual). I'm not sure what is happening beyond 1 bar, though.

I think if increasing the boost, the recirculating air valve become crucial - if it leaks, you lose some of the 'extra'. Also, cleaning my intercooler seems to have made a difference - probably in the re-tightening of the various hose connections. I'm going to try water-spray on the intercooler next.

-Alex