injector sizing...
 

hi people

im currently having a 2.1 stroker built which i would like to see around 380 what would be a good size injector to use?

many thanks

550`s or bigger

brilliant thankyou would 550's be sufficient?

Depends on if you ever want to use meth in the future.

Hi there

Personally I would go with 650cc if you are planning later on bit more power,with 550's you should be able reach that power,but not at stock fuel pressure,you will need to raise fuel pressure later

Hope this helps

Thanks,Jura

It is a crude rule of thumb.
But a useful table to give you an idea of what injectors to use

Injector Size.................BHP @3bar fuel press............BHP @3.5bar fuel press

380............................276................ ......................299
440............................320................ ......................346
550............................400................ ......................432
650............................473................ ......................511
740............................538................ ......................581
800............................582................ ......................628
850............................618................ ......................668
880............................640................ ......................691
960............................698................ ......................754
1000...........................727................ ......................786
1200...........................873................ ......................943
1600...........................1164............... ......................1257

Also go for something with a good spray pattern