Dyno Results B20VTEC

[ex96vtec]

"after the installation of the FPR and we cranked up the pressure as best we could"

FPR?

FPR= Fuel Pressure Regulator. John

 

[Shogun]

Thats a little low for a B20vtec but its still nice. My bro is planning on putting a b20vtec in a 4th gen hatch sometime

 

[Billy.]

ill be getting a fuel pump very soon. also forgot to mention that the cat's O2 sensor is shot and giving bad signals to the ecu so the CEL is lit up like a christmas tree, but what honda owners CEL isnt lit?? haha

 

[Revolver]

A new fuel pump isn't what you need. Some bigger injectors and a good way to control them (hondata, uberdata, etc) is what you need.

 

[Billy.]

A new fuel pump isn't what you need. Some bigger injectors and a good way to control them (hondata, uberdata, etc) is what you need.

actually no. the injectors are handling the pressure fine. if they were giving out it would start running super lean in the upper rpm's. it needs a pump...

 

[Revolver]

actually no. the injectors are handling the pressure fine. if they were giving out it would start running super lean in the upper rpm's. it needs a pump...

The stock B16 pump can handle 300hp so it is fine. Upping fuel pressure to increase flow puts strain on your injectors and is just a lousy way to increase fuel flow when compaired to duty cycle manipulation. Your ecu also doesn't know you added an extra 400cc's of displacement so its not giving you enough fuel and the VAFC obviously isn't compensating enough.

 

[ruff_ridaz99]

might just be me or what...but did you lose hp/tq in the second run? isn't that after the VAFC tuning?

 

[Mr.Luder]

so wut fuel pump are u gonna get than?

 

[Billy.]

might just be me or what...but did you lose hp/tq in the second run? isn't that after the VAFC tuning?

the "first run" was actually done a couple weeks ago when the weather was much cooler, notice its labeled run_006 and the second run is labeled run_016. also we didnt take the revs as high so we didnt get the same MAX power.

i still have to back up the fact that when a car is dynoed that needs injectors, the air/fuel curve rapidly goes lean as in a very sharp curve upwards. ive seen it. this doesnt go to say that im not replacing the injectors, in fact ill be replacing the injectors, pump, rail, and filter in the next few weeks.

 

[bizoneoeh]

I wish I would've kept my dyno sheet

 

[silver booolet]

those numbers seem low IMO for a b20/vtec. the torque is up there, but the hp is low. b20/vtec crex around here runnin stock everything from honda put 175 at the wheels. what are you using for tuning, just a hack?


btw, i think u need to retune when ur vtec kicks in