Removing fuel damper, good or bad?
- Thread starter destrux
- Start date
A possible 3000 rpm breakup. But I'm in the middle of putting the DM line on with an adapter to intergrate the fuel dampener In the line. My stock line was kinked to all he'll.
Moral of the story is I reccomend the DM line. But I reccomend the dampner too.
Moral of the story is I reccomend the DM line. But I reccomend the dampner too.
That 3000 RPM break up has been happening since early 2000. I called Aaron and that is what he told me. I researched it, which he said to do, and it is true. It is really a hit or miss. The lines are meant for a upgraded fuel system and above stock HP ratings.
with my setup and that line i was running way too rich and getting a 2500 sputter, i put the damper back in and its running flawlessly now. I say do it, if not you can always find a stock damper for 20-50 bux, i got mine for 25, i still kept the line so i can integrate the DM line & damper one day
Ah, I see. I know what the damper does... it smooths out the pulses from the fuel pump rotor so that you have smooth fuel pressure. I was just going to say that it must be something specific to toyota, but I remember seeing a damper in the tank on my mitsubishi and on several other kinds of cars too.
I guess I'd rather just keep it there then. The hose that goes from the damper to the rail was kinked and I wanted to replace it as a precaution. I have a bunch of banjo fittings around, I could just make one up I guess.
I guess I'd rather just keep it there then. The hose that goes from the damper to the rail was kinked and I wanted to replace it as a precaution. I have a bunch of banjo fittings around, I could just make one up I guess.
Yea i have an AFPR, anything under 43 PSI w/no vac on it it would sputter and misfire like HELL, 45/50PSI w/o vac line on it would run better but still be pig rich.
i figured out my issues with the misfire it was the DM bypass line... Now i'm @ 35 PSI and i'm running leaner then because 9.3 @ full throttle vs under 8.6 lol
Like most mechanical systems, the fuel system has resonances related to the length of the components and the speed which the pressure waves travel in the lines. The injector fuel rail is particularly susceptible because it has two closed ends forming a nice resonator (standing waves with high and low pressure along the rail), and a bunch of vibrating injectors to excite the resonance. The dampener de-Q's the resonator, it reduces the ratio of stored energy to energy dissipated. Any mechanical system of this nature needs to have it resonances managed, which is why all the auto manufacturers use them. Its been said many times on this site, if you don't understand why something is there, don't remove it.
Well said.
On a related note... I found out that the oil fitting banjo bolt from the 7MGTE oil cooler return pipe is the same thread as the fuel hose banjo bolts, but has a larger passageway inside. It should flow quite a bit more than the stock fuel bolts.
The 7MGTE oil cooler return pipe could also be used if you wanted a cheap way to hook 3/8" fuel hose to the fuel rail.
I cut the outer rubber cover off the kinked fuel hose only to find out that it was not kinked after all. ::happy claus:: So I'll just be putting that back on and moving on to the rest of my list.
On a related note... I found out that the oil fitting banjo bolt from the 7MGTE oil cooler return pipe is the same thread as the fuel hose banjo bolts, but has a larger passageway inside. It should flow quite a bit more than the stock fuel bolts.
The 7MGTE oil cooler return pipe could also be used if you wanted a cheap way to hook 3/8" fuel hose to the fuel rail.
I cut the outer rubber cover off the kinked fuel hose only to find out that it was not kinked after all. ::happy claus:: So I'll just be putting that back on and moving on to the rest of my list.
OneJSupra;1634489 said:
Same here. Running a walbro pump, mkiv 550's, afpr and the bypass line. No issues.
Aaron said he was working on solution to still have the SS lines but using the FPD. I don't know what the timing is of this though.
^Yea he's going to have fittings that go into the damper then split the current line into 2.... i think...