Hi peeps,

just been looking at a MR2 Tubby on ebay :slap: and the guy who

is selling it says its got 33 bhp water inj ,flowed heads, induction,etc,etc

nice kit on it,but its got a little problem, he says "the boost wont kick in"

he reckons a tune up on a rolling road would sort it! any ideas why it wont boost,maybe boost leak,shot tub,?? Its on the parts by brand bit under mr2 turbo .Would post the link but im crap on a pc

cheers

bubbles

um? does he mean 0% boost or not as much boost as it used to have?

the guy who

is selling it says its got 33 bhp water inj ,flowed heads,

 

WTF???

Water injection doesnt add bhp, its just there to prevent detonation...

Also, just one head on a 3sgte engine. ;)

Guy sounds like he doesnt know what he's talking about - always a worry on a modded car. If I were you I'd walk away.

"the boost wont kick in"

 

i wouldnt bother reading any further past that TBH

i wouldnt walk away TBH......................I'd run very fast.

water injection adds water to the intake air so that it cools the combustion process - normally by about 100 degrees C. It means you can run a higher than recommended boost and primarily it stops the pistons melting. Problem is that if the jets get blocked (often in hard water areas) then the pistons melt. I used to run a Group 4 Sabb 99 Turbo with water injection many years ago - things may have changed by now.

 

The boost did used to come in 2 stages - 1st stage up to the normal max boost then you'd get an extra surge beyond the normal max.

 

If the water injection has stopped working, this would explain his 'boost won't kick-in'' statement.

 

But, beware, if he's been running a higher boost without the cooling water in the cylinders he could have done a lot of damage - normally holed piston(s).

 

Only real way to find out is drive the car - a holed piston can't be hidden.

 

Good luck

 

Jack