Was ITB size for 2270 motor Now Single plenum 2270 Options

[cgnj]

I have been running 45 dells on 2270 with 34mm vents. Not sure if it was the cam choice (163/86b0, but it was much easier to drive with than with the 38/39 vents.

I was going to gut my spare dells for this project, but I think they are worth more in the box.

So, for street 2270 what size motorcycle from wich bike tb should I be looking at for a first build?

Thanks in advance,
Carlos

[cgnj]

I decided to back burner ITBs. I did a little bit of math, went through my boxes and this is my plan. Based on this math.

My cam is all in @7200 rpm. displacement=2270cc ( 138.52 ci)+10%
Math says (((7200/2)*138.52)/1728)*1.1=318 cfm. That puts me in the 944 throttle body range and I have a box of 4. (Good thig I paid 130k for the BSCE @ private college for my son. How is that for ROI?)

The advantage is that it is much easier to bore the plenum out more if I'm not making the required air. If that is still not enough, it will be time to fab a custom plenum and runners.


2.1 liter waterboxer plenum( in the mail), 944 tb in hand. Stock intake runners. MS in hand, trigger wheel in hand. I dropped my motor over the weekend and and expect to have this ready for MS Sunday night. I have a shot at having it ready to go for Hershey, otherwise would it be OK for me to park a 928 in the 914 area?

Even if it is not perfect, I think I'm on the right track. I think that all of these tb sizies are overblown. My personal experenice with dellorttos is that I had to swap vwnts from 38 to 34. My other experience is the long a project sits, the less likely it ever get finished.

If I'm wrong it won't be the first time. Ask my ex.


Carlos