Skeptic of Banjo Bolt/PD Elimination Mod
#1
Mechanical Engineering
Thread Starter
Skeptic of Banjo bolt mod
Moderators Note: This is an excellant discussion regarding the conequences of replacing the pulsation damper with a banjo bolt. Anyone thinking of doing this mod should read this thread completely and make their own decisions. This thread contains some mild arguing, so be patient and read it to th end. Lots of good info.
Hey all
i have pretty much everything required to do that bonjo bolt swap. but im a bit skeptical of the procedure. like why am i removing a "shock" where there should be one? i mean when i think about it its like if my car had no suspension it would shake itself to death and eventually fall all to pieces. so can someone give me some rational or PROOF that it actually works and why the PD isnt needed if its put on ALL the fuel injected rotarys.
i just want to be sure im not going to get another fuel leak and loose my 10th AE
Hey all
i have pretty much everything required to do that bonjo bolt swap. but im a bit skeptical of the procedure. like why am i removing a "shock" where there should be one? i mean when i think about it its like if my car had no suspension it would shake itself to death and eventually fall all to pieces. so can someone give me some rational or PROOF that it actually works and why the PD isnt needed if its put on ALL the fuel injected rotarys.
i just want to be sure im not going to get another fuel leak and loose my 10th AE
Last edited by Aaron Cake; 06-01-05 at 10:11 AM.
#2
Rotorhead
Join Date: Feb 2001
Location: Charlottesville, Virginia, USA
Posts: 9,136
Likes: 0
Received 39 Likes
on
33 Posts
The banjo bolt mod requires an aftermarket FPR with a built-in pulsation dampener if you want to keep the pulsation dampening properties. Otherwise, yes, I would be worried about killing the fuel injectors and/or improper fuel metering without a pulsation dampener.
#3
Mechanical Engineering
Thread Starter
ok thats one thing i never really found in the banjo bolt mods. but what is a good fpr to buy i wanna do it soon so something locally available (pepboys or autozone)
#7
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally Posted by capn
im more scared of having my 10th ae catch on fire due to the pd
Trending Topics
#9
Engine, Not Motor
iTrader: (1)
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 109 Likes
on
92 Posts
NZ pretty much covered what I was going to say. The PD is there for a reason, to absorb the "shockwaves" formed when the injectors snap open/closed. Nearly every EFI system on the planet is equipped with a PD, for good reason.
As for the part leaking, yes, like any part, they will eventually fail. But the vast majority of RX-7s out there are still driving on their original PD without issues. There will always be some initial failure, it can happen with any part.
Maybe I'm just weird, but I don't drive around in fear waiting for my PD to fail.
As for the part leaking, yes, like any part, they will eventually fail. But the vast majority of RX-7s out there are still driving on their original PD without issues. There will always be some initial failure, it can happen with any part.
Maybe I'm just weird, but I don't drive around in fear waiting for my PD to fail.
#10
Mechanical Engineering
Thread Starter
Originally Posted by RotaryResurrection
Ive done it for years with no issues. IF you're a whiner, or a purist type, make your way to the local dealership and place an order for a new $125 PD and be happy while waiting for *it* to fail in a few years' time.
#11
Rotorhead
Join Date: Feb 2001
Location: Charlottesville, Virginia, USA
Posts: 9,136
Likes: 0
Received 39 Likes
on
33 Posts
Originally Posted by capn
but what is a good fpr to buy i wanna do it soon so something locally available (pepboys or autozone)
http://www.rx7store.net/index.asp?Pa...S&Category=262
http://www.essexind.com/sx_frame.htm
#12
i am legendary
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 8,478
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by capn
is it really $125??? if it is im just going to buy an aftermarket one. like the marren one and be done with it thats rediculous.
#14
Ga-nome liberator
Join Date: Jul 2002
Location: Hell
Posts: 1,990
Likes: 0
Received 0 Likes
on
0 Posts
The PD is a neccessary part of the fuel system. If you are worried about it failing and don't want to spend the 125 on a new one from mazda, get a marren. They are $115 and they don't have the problem of the nut working itself loose. Sounds like a win win situation to me, but then again I'm one of those freak guys who chooses to buy things that work rather than eliminating an essential part of the fuel system.
http://www.injector.com/fueldampers.php
- Steiner
http://www.injector.com/fueldampers.php
- Steiner
#15
i am legendary
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 8,478
Likes: 0
Received 0 Likes
on
0 Posts
I actually have a question that kind of goes along with all this. RETed's parallel fuel mod on his site has interested me, and I know it doesn't use a PD. Because of the FPR and the fact it's parallel does that mean it no longer needs it at all? Or is it another one of those "not that big of a deal" things like many people call the banjo bolt mod?
#16
Banned. I got OWNED!!!
Join Date: Sep 2004
Location: .
Posts: 160
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by SnowmanSteiner
The PD is a neccessary part of the fuel system. If you are worried about it failing and don't want to spend the 125 on a new one from mazda, get a marren. They are $115 and they don't have the problem of the nut working itself loose. Sounds like a win win situation to me, but then again I'm one of those freak guys who chooses to buy things that work rather than eliminating an essential part of the fuel system.
http://www.injector.com/fueldampers.php
- Steiner
http://www.injector.com/fueldampers.php
- Steiner
#18
Mechanical Engineering
Thread Starter
Originally Posted by gingenhagen
archive has a marren FPD retrofit for N/As
but i have a turbo so i could do a write up with pics for turbo models
#20
Eat Rice Don't Drive it.
iTrader: (3)
Originally Posted by capn
Hey all
i have pretty much everything required to do that bonjo bolt swap. but im a bit skeptical of the procedure. like why am i removing a "shock" where there should be one? i mean when i think about it its like if my car had no suspension it would shake itself to death and eventually fall all to pieces. so can someone give me some rational or PROOF that it actually works and why the PD isnt needed if its put on ALL the fuel injected rotarys.
i just want to be sure im not going to get another fuel leak and loose my 10th AE
i have pretty much everything required to do that bonjo bolt swap. but im a bit skeptical of the procedure. like why am i removing a "shock" where there should be one? i mean when i think about it its like if my car had no suspension it would shake itself to death and eventually fall all to pieces. so can someone give me some rational or PROOF that it actually works and why the PD isnt needed if its put on ALL the fuel injected rotarys.
i just want to be sure im not going to get another fuel leak and loose my 10th AE
#21
I am 2Furious
Join Date: Sep 2004
Location: NJ / Philly
Posts: 846
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by capn
yeah i checked that out
but i have a turbo so i could do a write up with pics for turbo models
but i have a turbo so i could do a write up with pics for turbo models
#22
Mechanical Engineering
Thread Starter
Originally Posted by gingenhagen
Yeah, just needs more -6AN line and somewhere to stick that massive FPD.
#23
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally Posted by dDuB
RETed's parallel fuel mod on his site has interested me, and I know it doesn't use a PD. Because of the FPR and the fact it's parallel does that mean it no longer needs it at all?
#24
i am legendary
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 8,478
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by NZConvertible
Some aftermarket FPR's have a buit-in PD. That fact that the rails are in parallel doesn't mean a PD is no longer required.