I amost have all of the parts needed to get started, I just need alittle help getting the details worked out.

The main components to my setup:

H22A1, 100% stock block
Type-S cams
Euro-R intake manifold
SMSP header, 2.5" exhaust
Air intake of some kind (I have the type-s airbox/k&n filter right now)
Mild port job on the head

I know that the stock injectors are 345cc peak and hold. RC makes either 370 or 550's p&h. Is upgrading to the 370's worth my time, or should I just get the 550's? I will be tuning on hondata s200/p28. I'm not going to use an FPR and will modulate injector pulsing with hondata. Are 550's too big?

I have an ITR throttle body for the intake manifold which is 66mm tapered to 62mm. It appears that the euro-R IM has a 64mm opening. I'm thinking of sending them to maxbore to have the tb bored to a 70mm opening, tapering to 65mm port matched to the IM. Does this sound too aggressive for my setup?

Any informed help would be great, thanks guys.

 

doesnt sound too aggressive at all actually. I'd opt for a 70mm throttle plate tho and get a better intake solution. I really like my BPi intake. The h22 craves some intake so IMO about the throttle, go big or go home.

550's are huge. 345cc should be plenty big for such a mild build.