Dan, Dan, DAN!
We'll get that Estoril to go like mad.
Don't listen to Zack (he's a friend, so I can hate on him a bit....tough love, you know)...he's just a primo high end snob.
Simo this, n8p's that. Yeah, yeah....blah blah.....
For the money -110.00 you simply can't beat the overall performance of the Estoril. Simo will kill your low end unless you've got an 80cc kit. Estoril has the widest powerband with great torque.
I had my Magnum with it on there, 15x38 gearing, and it would pull close to 50 on a 15mm Bing.
Your big deal here really could be the porting on that Polini. But if not...I think you'll be right around an 88 or 90 jet. The humidity here is unreal. Lowers jet range by 2 steps I've found.
But don't worry, man.....believe me....that piece of SHIT Biturbo can't hold a candle to the Estoril. My brother just swapped out his nice Proma GP which is supposed to have great low end and good power for an Estoril on his Metra 65. He says there's literally no comparision. Esotril gives him higher top end and better acceleration.