Has anybody tried a 62 psi fuel pressure regulator ? I see Horse Power Inc. Has them. Is it worth the money ?
tia,
Pop

 

A Delphi regulator is 4 bar (58psi) and costs much less than $115. Is there a special need you have?

 

No special need, just seems that the higher psi would atomize the fuel better. Spent a lot of years working with diesels. Higher psi on injectors atomizes fuel better, giving better (more complete) burn of the diesel fuel. Better burn = more power from fuel used. Figured it would be the same with a gasoline system.

 

hummmm????
on efi, more pressure would reduce dwell time which can be +/- .
mechanical diesel or electronic injectors?
also, remember that the two are diff animals and inject differently during the stroke one being more or less a mixing vs flame thrower lacking better words.
in early days, increase pressure could add hp per given injector but that was in a all out situation when computers were stupid. today, computers are way smarter and can adjust dwell on the fly.

 

I have used one on a bike that had injectors at borderline of being tapped out. It worked for the application but doesn't make as big of a difference as one might think. We are talking 4 psi. Not much more fuel volume is added and the upped psi does raise dead times. End result was a dropped of about 4-5% in duty cycle. Which worked for the application but other mods where planned and bigger injectors were apart of it.

IMO getting injectors with correct spray patterns for our HD's is more important for fuel atomization, but people seem to go with stream injectors when building. So......

 

The specification on the stock regulator is 58 - 62 psi to start with, so how much are you really gaining if you go to a 62 psi regulator? I am sure it has a specification as well so until you know what it is I would keep my money in my pocket.

 

Thanks for the info and comments. Bike is '03 rk w/103, so I have a stupid computer, compared to the new bikes. CR575 gear cams, Heads ported, 10.5:1 comp, tts tuner. Probably forgot something. 107 hp, 128 tq

 

You sure you don't have a typo on that torque number?

 

since when did hd use a smart computer?
the only thing i can think of is parade mode to help cool the machine but that is dumb to begin with, just fix the issue. americans, we always use band-aides.

 

No, it's not a typo. If you want, and if I can figure it out, I'll post the dyno sheet. I thought it high on the torque as well, but my dyno guy said it is correct.
As far as dumb ecm, it doesn't use O2 sensors, is what I was meaning.
Thanks,
Pop