Mr.kidD

I've been searching for this but i haven't found anything besides explanations of failures. Does anyone have a good write up or step by step pictures on the banjo bolt pulsation damper mod for an s4 turbo?

1SWEET7

iTrader: (1)

A step by step shouldn't be necessary. You unscrew the pulsation damper and put a new one back on (or a bolt) with new crush washers... I took the rail completely off the engine and put it in a vise. If you search you should easily find some answers if you need them.

87 t-66

iTrader: (133)

write up:

1. remove PD
2. install banjo bolt w/ crush washers

SirCygnus

iTrader: (1)

you guys are forgetting the most important part of the write up.

remove the upper intake manifold.

RotaryEvolution

iTrader: (30)

i haven't seen a writeup on how to disassemble the upper end on a TII, so that would explain it.

Mr.kidD

thats actually what i was getting at. I wanna know if theres anything i need a heads up on while trying to get to the damper. I think i read somewhere its easier to take off the hood. These are the kinda things i wanna know so i dont get surprised half way through or take too long and have to leave it in pieces over night. im trying to finish it in one organized attempt. so anything annoying i should know about or any methods to make the job as painless as possible?

Black Knight RX7 FC3S

iTrader: (7)

its nothing major
as long as you remember where everything you take off is connected to, should be a piece of cake. No need to take the hood off.

When you do install the new PD, make sure you prime the fuel pump before bolting the upper intake manifold back on. It sucks to have a leak after you bolted the upper intake back on since you will have to take it back off to fix what ever the leak is.

SpeedOfLife

iTrader: (16)

biggest thing here: DO NOT DROP ANYTHING DOWN YOUR INTAKE RUNNERS. as soon as they're exposed, plug them with clean rags.

nycgps

iTrader: (4)

We need a write up for "how to read FSM for dummies"

sharingan 19

iTrader: (16)

Wouldn't it be cool if the forum could host the fsm and its pages were pulled up when people used the search function.........although that would require that people use the search function...

TheAbsence

iTrader: (19)

I thought there was one in the Archive but I'm not sure.

https://www.rx7club.com/forum/showth...ght=banjo+bolt

https://www.rx7club.com/2nd-gen-archive-72/skeptic-banjo-bolt-pd-elimination-mod-395021/

Mr.kidD

That would be cool if there was a function for you to Stfu. No body asked u directly for help or commenting. some people dont feel like searching through bs when they can get a email alerted response to their own personalized question. Thanks 0__0

Mr.kidD

Thanks. I just read that the banjo bolt mod can in danger the engine. I didn't know i was basically disabling the pulsation damper i just want to prevent a fire.

One of those threads said that the fuel would basically lose sync and could make the engine run lean. they said it was mostly dangerous in high hp power set ups which is what i have especially since i planned to do this mod and tune my car.

wth do i do now? look for an s5 fuel rail? is this true that the banjo bolt is not a good way to prevent pulsation damper damage?

jerd_hambone

If you don't want to use the search feature then you are going to really dislike this forum.

You don't want to search through bullshit for hours, yet this is exactly the reason that there is so much of it. People won't use search and just continually post the same questions over and over and over again.

With that said, the banjo bolt removes the pulsation damper, so the risk of engine fire is eliminated. But there is a risk that your fuel injectors can be damaged and possibility of the car running lean. Both of which are based off theory.

I've not heard of damage from the banjo bolt mod, but it is possible.

Derekcat

iTrader: (8)

Ditto on Bunnybunny's post.

Also, if you're really worried about it, you can install a line into the rail and remote mount the PD. [Found a thread about it once.... While searching XD]

rx7freak13v

I used a banjo bolt on my 88 na for about 4 months (I was out of work and couldn't afford the $90 for a new one). the injectors sends shockwaves through the fuel line, the pd removes these. After installing tge banjo bolt, my fuel IN line would split somewhere between tge filter and the primary fuel hose. I wouldn't catch it immediately so I would lose a 1/4-1/2 a tank of gas everytime the hose split. It was horrible, I lost more than $90 worth of gas. Just spend the $90 on the new one now so u don't want to shoot urself like I did when ur on a date and ur fuel line spluts sending gas everywhere. Promise, no girl wants to go out with a guy that always smells like raw gas lol. Seriously though, just buy a new one.

sharingan 19

iTrader: (16)

First, if you are too lazy to search for the answer to a question that had been asked and answered over 100 times, you are probably too lazy to maintain a "high hp" setup.

Now, more on topic...a banjo bolt will not make a fuel line split. Using the wrong sized fuel hose, using a hose not meant for fuel, or installing the hose wrong, those are things that will make your fuel line split.

As stated previously, all banjo bolt "complications" are theatrical in nature, to the best of my knowledge there is not one documented case of a banjo bolt (or lack of a pd) causing any fuel related problems.

esjoson1126

http://www.rotaryresurrection.com/2n..._dampener.html

SirCygnus

iTrader: (1)

i highly doubt this.

jerd_hambone

+1 It would take some pretty extreme psi to do that.

rx7freak13v

I have 6 friends at least that could vouge for my fuel line issue back when I was running the banjo bolt. I was running a bosch oem replacement fuel pump, so no extra psi. I use only high pressure fuel injection fuel hose that I pay 6.99 a foot for at my local advance auto parts. Fuel hose and gas adds up after a few weeks. The replacement pd is only $90. Not like its ultimatly expensive. After putting the new pd on my car and replacing the fuel line the problem stopped and hadnt had any more problems from it. Now days though I'm running side draft dellorto's. Still only use efi fuel hose though. 7/10 ppl who's used a banjo bolt will tell u not to use it. If u search, this topic has been covered many times. Just trying to save the OP the hassls that I went through.

Mr.kidD

Ok so if I wanna say screw the banjo bolt and get an s5 fuel rail is it as simple as replacing that too? which fuel rail is it and what else should I know about replacing the old fuel rail and installing the new one?

RotaryEvolution

iTrader: (30)

the 25+ year old lines will have cracked by now, that wasn't the PDs fault that they started leaking from shitty old lines that should have been replaced by a cheap ***.

where did you come up with this figure? you are obviously biased so only looked for what you wanted to see which was people who claimed that omitting the FPD was a bad idea. many people have run without one for many years with 0 issues with the EXCEPTION that we use new fuel lines when dealing with crappy old original fuel lines that have 100k miles on them.

you wonder why the fuel line split, it doesn't take more than 2 brain cells rubbed together to look at the fuel line and feel how hard and brittle it is and decide that just maybe the line wasn't in the best of condition to start with. which cost you less in the end, spending the $10 for new fuel lines or the wasted fuel, potential fire hazard and wasted time redoing the job.

sharingan 19

iTrader: (16)

I'm sure your friends "vouge" very well, shame that does nothing to add credibility to your biased and inaccurate claims. If you wish to actually help the OP why don't you post some links to the threads which support your "7/10" figure.

The S5 fuel rail PD can still fail too (albeit not quite as often as the s4) keep in mind that even the newest s5 rail (and PD) is still 20 years old, not something I would trust considering an engine fire will likely result if it fails. Additionally if you choose to upgrade your fuel setup for "high hp" an s4 rail will facilitate that as then ends are threaded and can easily accept -AN fittings.

If you decide you still want to install an s5 rail it is as simple as removing the old one and installing the new one. I have read that depending on what kind of injectors you are running you may have to use spacers for proper fitment with the s5 rails. Other than that , just make sure you depressurize the fuel system and disconnect the battery.

rx7freak13v

Before using the banjo bolt I did replace my fuel lines. Starting at the gas tank and all forward. Including a rats nest delete. If all new fuel lines on an efi car costs u less than $10 then YOUR not using high pressure efi fuel hose. It costes me $60 to relace all my fuel hose using efi rated fuel hose at $6.99 a foot. Have any of you that's defending the banjo bolt used it long term? I did. And my brand new fuel hose kept splitting and I had to keep replacing it. That meant at least once a week I had to remove my uim, pay for more fuel line ahain, pay for another uim gasket and replace the fuel hose, reinstall the uim just because I didn't want to pay the $90 after tax at the only local part store that stocked it (carquest). If you haven't used it, don't defend it. Any credited rotary mechanic will tell you not to use long. Only a temperaru fix to get the car home or to the shop to have the leaky pd replaced. Yes a new pd will fail and be a potential fire hazard again....in another 8-10 years. Our cars are over 20 years old with over 100,000 miles on them. Of course something will fail. If ur fpr fails, are u going to banjo bolt that too? The fpr uses a diaphram that will fail eventualy also. Might as well use banjo bolts on the tires that went bald from too many miles as well, because no point in replacing them when they're just going to go bald again. Brake pads too I guess. Use the search button. I did my research. I'm trying to save the op from making the same mistake I did. I lost a lot more than $90 by using the banjo bolt.

My friends were the ones helping me pull my intake every week to replace my fuel lines. If u baby the car, the lines should b okay. But as soon as I hit 4500 or more rpm the line would split. That becomes a fire hazard all over again.

I'm working off a shitty lg optimus android phone. Its a pita to try to post links. My phone is defective and freezes a lot while trying to multitask on it.

I'm not trying to argue or put anyone down. This was my experience, it was shitty. I wouldn't want anyone else to go through it like I did. I'm not a cheap ***, if was I wouldn't own a 7.

Take it as u want but when your fuel lines split, at least u kno why. everyone has to make their mistakes I guess and everyone that doesn't have ecperience still has an oppinion.