T3 turbo, R-tech go it going at 300bhp with 1bar of boost on stock internals on a seat 1.8T with actuator on board.http://www.ebay.co.uk/itm/Volkswagen-Golf-1-8T-T3-T4-TURBOCHARGER-TURBO-MANIFOLD-KIT-/190582904701?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2c5fa0577dHave a think
Surely better off with the gt28rs if you can afford it, dont have the lag like from the t3 and make just as good power.
Was talking to one of usa boys running 28rs, 415cc inj, 4bar reg, 3" maf, d/p, 2.5" exh, with standard smic with vented arch with no internal work making 306bhp.
generally with a agu you should be fine at the 300 bhp mark but do you want to spend that much money get it all up and running for it to throw a rod through the block cause it at its limits?
Birchy runs 325bhp with one in a polo, AGU engine no internal work. Agu are good for 340ish he told me.