Direct port or not ?
 

Hi

I need to order a HFS-3 system for a Subaru 4cyl, going for 700-750hp at max boost,
this is with pump EU 100octane and the meth/water injection

is it bettter to run direct port + 1 or 2 jets after IC,
or will 2jets after ic be enought ?

What would be the best setup for this ?

Advice needed before making a order

Thanks

Re: Direct port or not ?
 

Direct port is good on engines where the distribution is problematic, that is the main way I select it for different customers applications. Manifolds typically for EFI are only considered for air mass flow, not fuel flow as in carburetor designs. So that probably would influence which way could be preferable in your case?

Re: Direct port or not ?
 

Thanks,

I dont consider the distribution is a problem on a subaru, so it migt just be best to run jets after IC on this
I have seen some subaru´s that runs big power with 2 jets after IC and not direct port , so it must be working great that way