Apart from Taps and a couple of others here, wot a load of sh1t you know nuffinks talk....

The reason V6 Vectra injectors work better in these engines is because they have a better spray pattern, giving better fuel atomisation. They will flow more fuel if the lambdas tell the ecu to hold 'em open longer, but more fuel is not the issue here.

Also, fit BOA heads to a BOB block and get 9:1 compression....that's clever, cos a stock BOB is 9.7:1 lololol

And as for getting more power from a weedy little 4 pot YB don't even get me started on that one, they cost a fortune to build right and don't last long over about 330 BHP....
If you really want to know, a BOB has the strongest bottom end and is easy to get big power without spending loads if you know how.....

Exhaust headers are good, BOB cams ARE better than BOA, Decent Intake with cold air, (not a crap Halfrauds one), and after that turbo it up to about 12 psi on stock cr, and run Emerald or Megasquirt Management.

Will eat YB's for breakfast and last 10 times longer if you've built it right.

Right thats my 10p worth, I'm off to continue building rally cars.

Dave