turbo modification

[alan pritchard]

I found a turbo in the scrapyard today, seems in good condition,  it has an integral wastegate and it is a garret.  it came off of a mg metro turbo (1275cc)  so im hoping it will be the basis for my lightly blown coupe gt(t).

I have a few questions though, obviously this turbo assembly is designed to produce approx 5-7 psi at peak revs ,  i guess 4500 ish from a 1275 cc engine.  Obviously this turbo will spin up quicker as my engine is 2144cc, and the wastgate will also open earlier, so what effect will running the turbo with the wastegate open from lower revs have?  will it be possible to run the turbo too fast and cause damage?  also the cfm for the turbo will be much lower than an equivalent factory fitted turbo, therefore i will have lower boost, but will this cause the engine to suffocate???
hopefully with this amount of low boost i will not require an intercooler, but will have to stop the airbox from inflating/ leaking, fabricate a manifold and downpipe adaptor, also do something with the pipe that goes from the manifold to the metering head,  but will my current fuel regulator compensate for positive manifold pressure (ke engine , k jet) or would i be best to make a pcb to drive the 6th injector?
whats everyones opinion on not doing it the audi way?
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