ITB 45 vs 48mm

[prodriv3r84]

Hi, what is the maximum power that I can get from a 45mm itbs and 48mm the engine (F4R 730) Iam building will run at 7800 rpm maximum. Thanks

 

[NorthloopCup]

What cams you going to be running? Any head work done?

 

[bloke]

do you mean what ones should you buy?

 

[Kev@KAM]

You should match the throttlebodies to the engine spec. What cams, compression, headwork, exhaust etc etc. Its not a bolt-on-gain-x-bhp type of modification.

 

[prodriv3r84]

What cams you going to be running? Any head work done?

423 Cams, Little work on the head and 12.2 CR
Thanks

 

[NorthloopCup]

423 Cams, Little work on the head and 12.2 CR
Thanks

Go with the 48’s then. The 45’s will restrict it.

 

[bloke]

I'd say would be fine with 45s with running standard comp but if you want to throw 48s on then not like it would be an issue with them.

 

[prodriv3r84]

Thanks for your feedback, I will assembly with a borrowed 45mm jenvey inlet to start. After I will decide which one to go. I will post the dyno graph ASAP

Cheers