Project84

How many people have replaced the pulsation damper with a banjo bolt?

scathcart

I have. No adverse affects to any running conditions, AFR's, or fuel pressures under any load. I have done this on several cars.

nik

I replaced it with a brand new pulsation damper. Also no apparent ill effects .

slow87turbo

banjo bolt i think it runs better. but that could have been from removing half the crap in the vacume system. or the harness re wire.


ej

Pinfield357

banjo bolt here

13bpower

PD, I need to do that.

SnowmanSteiner

Just get rid of it all together, run parallel fuel rails, and you can eliminate the PD and have one less worry on your mind.

- Steiner

edomund

New motor with new PD here it's there for a reason.

j200pruf

iTrader: (4)

I just spent the big $$$ to replace my PD, shouldn't have done it since I am switching to a different manifold and what not, but what the hell it's only money right.

Rpeck

I'm running the Earls banjo bolt fix, no problems thus far.

Kai

I have an Earl's banjo bolt waiting to go in sometime next week.

Impreza2RX7

Im personally buying the K2RD secondary fuel rail and I'm going to run a parallel fuel system on my car, thus eliminating the PD dampener, when I took the fuel rail out, the PD was rattling, that cant be good

banzaitoyota

Currently I have a NEW S4 PD on the car.

jreynish

iTrader: (2)

would someone care to explain the banjo bolt fix?

scathcart

Unscrew the PD (S4 fuel rails only, on S5's its welded to the fuel rail), and screw in a banjo bolt.

For you to do so would require a swap to an S4 pirmary fuel rail.

JohnWohl

im doing the banjo bolt as a temporary fix, cuz i poor right now, but later i plan to do something 'better'.

NZConvertible

The PD absorbs pressure fluctuations caused by the injectors opening and closing, which would normally result is varying pressure (and hence fuel flow) at each injector. This ensures accurate injection amounts every time.

I don't know why you wouldn't want one. A new one will last 15+ years just like the original one, so replacing it with a banjo bolt because you think a new one is a fire risk is flawed thinking.

Rpeck

I hear what your saying NZ, but... I have seen the screws back out in those things also... it's not just the tearing that causes the fires. I see 0 impact on a steady idle or jumpy injectors period. And a PD could fail, when is a questions ... but a Banjo bolt will NOT fail. that piece of mind to me is worth the pulses in the injectors that no dyno, or butt dyno could ever see or notice.


A interesting thought to me was what did they do to eliminate the PD in FD's and RX8's and why don't other fuel injected cars need these things? .. a fuel injector is a fuel injector no matter what the car is.

-Robert

NZConvertible

Both the screw and the diaphram have to fail for the PD to leak.
True, but replacing the PD with a new one means the chances of it failing in the next 15 years is slim to none. I believe they've been changed anyway, so the chance of failure is negligible. There's also the S5 fuel rail option. I'd just rather my engine had a working PD like it's supposed to.
Nearly all EFI cars (including FD's and probably FE's) have pulsation dampers. You'd have a hard time finding one without one.

Kai

Yeah, every EFI Honda (gasp!) I have ever worked on has a pulsation damper. You never hear about other car's PD's because they don't fail nearly as often as ours.

I've never heard of a Honda pulsation damper failing, ever.

edomund

Most EFI cars do have pulsation dampers most are in other places like in line on the pump or after the filter.
The owner of the shop I used to work at, (used to tune Skylines for Prince and Nissan in Japan) explained it like the pulses can not only interupt fuel but also damage injectors, the pulses can slam against the injectors instead of slaming against a diaphram that takes out the impact.

So you might not see the ill effects of no pd but it is there for a reason. He is the reason I went against the banjo bolt and bought a new PD for my new motor.

Those things last for a long time and a big fuel leak like those give when broken is very easy to smell. If your car burns from pd fire you neglected that strong *** fuel smells for days.

j200pruf

iTrader: (4)

How does using parallel fuel rails eliminate the the use of a PD?

oregano

iTrader: (1)

"im doing the banjo bolt as a temporary fix, cuz i poor right now, but later i plan to do something 'better'."

yeah, me too john. this car is burning my money.

Oh, right now my fuel lines are leaking cuz i live in canada

hIGGI

iTrader: (7)

every car we work on we put banjo bolt on, already over 10 cars easy...

Icemark

I have seen more than a hand full of Hondas with Denso PDs have their PD's leak. There is even a informal factory recall if you bring a mid-eighties Honda Accord in with it leaking and complain about it.

Honda and Toyota both used the same Denso screw in PD that was on the S4.