I had just put together my motor and was wondering what size injector I can use

383 stroker
Callies crank
Je pistons
Crower rods
237/242- 595/598 110 lsa
Advanced induction 200 cc heads with geometry corrected intake
1.6 pro mags

I was goin to go with a set of 42lbs

Like to have some insite please thanks

 

42 #/HR injectors will support up to 600HP normally aspirated. You would appear to be within that limit.

 

Thank you cause I see some guys running 30lbs in some h/c/I cars so now I know I need 42's

thank you

 

To get the minimum recommended size for an NA engine, multiply the flywheel HP by 0.07

That assumes an 0.476 BSFC and 85% DC.

Example: 500 HP x 0.07 = 35#/HR

 

So I am thinking I'll have 425 to the wheels so I think 30lb would be good 425x.007 =29.75

 

duty cycle on injectors go by the power at the crank before drivetrain loss. Going by 15% loss you'd want to go by 500 fwhp if you expect 425 at the wheels. In which case i'd go with the 42's.

 

I see now thank you for the input

 

I posted above that you need to multiply the FLYWHEEL HP. The injectors have to make the power at the flywheel. They have no way of knowing whether you are loosing 13% through a T56 or 25% through a loose TH400.