Adam West

Is it neccessary to change all the fuels lines even the one from the fuel pump to the fuel filter when lookin for more fuel delivery????? how many lph are stock honda fuel lines good for???? thisis for a h swap

IHateJDM

i don't know how many lph they are good for, but they can handle a lot more than a stock H.

Adam West

so I wouldnt have to change the lines under thecar to the fp then right????

IHateJDM

nope, i know from experience that you can run rich as hell with an H22 on those stock lines.

Adam West

thank you sir help is greatly appreciated... reason I asked is cause I was ready a build up and they mentione stock fuel systems need to be upgraded completly when more fuel delivery is needed... I guess I will stick with a fuel filter and red lines to dress it up....

IHateJDM

right now i'm running a stock civic dx fuel pump, stock lines, inline fuel filter (fittings didn't match up during my swap since whoever pulled the motor cut the line from the fuel rail to the filter), stock H fuel rail, and 345 cc stock injectors. The only aftermarket piece I have on my fuel system is a b&m fpr, which I did need to crank up the fuel pressure about 10 psi to get to 40 at wot. If anything I'm running slightly rich right now, but the motor runs well.

Adam West

and u would crank the pressure from the regulator right???????

IHateJDM

yeah, the b&m fuel pressure regulator is designed to replace half of the stock unit. it really just gives it a stiffer spring and the ability to raise your fuel pressure. the stock fuel pump only gave me about 29 psi of pressure at wot (make sure you pull the vacuum line off the fpr to simulate wot), so I had to crank it up to around 40. 4th gen h22's (345cc injectors) are supposed to have 35-42 psi @ wot and 5th gen motors (290 cc injectors) should run 45-50 psi.

skunked

unless you have a motor that demands allot of fuel there is no need to replace the factory hardlines. Aftermarket fuel pump, FPR and injectors are a more common upgrade/requirement.

Adam West

ok so I should just get a fpr (in case) a good filter and a fuel rail???? I already have a walboro fuel pump

skunked

the rail won't do **** for ya. If you get a new fpr make sure you get a fuel psi gauge so you can make sure its set after the install. Fuel filters can get clogged easily from bad fuel or particles in your tank so I would suggest changing them often.

Adam West

perfecto. I was just looking for an excuse to buy ****.... I guess Im good with what I have.. only thing I have to do now is get the right fittings for the filter....