2kdrift

tried searching but could not find anyhthing
goal will be less then 300 HP maybe 280 at the MOST
MY setup:

D16z6
Walbro 255
450 DSM injectors


how much is the stock FPR good for with stock fuel system?
just curious because i kinda wanna buy the adjustable FPR but maybe its not necessary at all thanks

EDIT: i am also getting some info that i need to LOWER my fuel pressure to help the idle on the 450 DSM's

dpetro1

stock fpr is fine. i run one on my 400whp setup. never heard of lowering the pressure on the 450's. im sure your tuner can get them to idle just fine on stock honda fuel pressure.

0Deatschwerks

Agreed,

You should be able to dial in a good idle and cruise at stock fuel pressure on just 450cc injectors.

rev-speed

If you run race gas and target a/f at 12.5 you can do it/ it won t make it at lower 11 a/f

2k.civic.si

You dont need an adjustable fuel pressure regulator. Dont need to lower fuel pressure to get it to idle correctly. If your tuner told you that the fuel pressure needs to be lowered to idle 450's run away as fast as you can. Ive had no problem getting getting 750cc up to 1000+cc injectors to idle.