Fuel Pressure Damper Delete???? - Page 2 - Rennlist - Porsche Discussion Forums

Notices

Fuel Pressure Damper Delete????

 
Old 08-30-2018, 03:36 AM
  #16  
superloaf
User
Thread Starter
 
superloaf's Avatar
 
Join Date: Aug 2004
Location: Los Angeles, Nashville
Posts: 781
Default

I think the compression fittings are nice and less maintenance than a hose clamp. Many industrial assemblies use them. Of course, I suppose many industrial assemblies use hose clamps too.... But the compression fittings just seem more durable and more OEM.

I still feel the best and most durable line to use would be PTFE with SS braiding and then covered with fireproof sheathing. Of course, that's not what i'm using. But next time....

Also, one idea that I used and think is beneficial is the routing of the lines to the back of the engine and then along the fuel rail, thus avoiding the direct heat over the exhaust manifold.

Hey Droops, how's that GTV6? I have a Milano and an Alfetta sedan. Love those cars! And soooo easy to work on compared to the 951! Well, most of the time....
superloaf is offline  
Old 08-30-2018, 07:27 PM
  #17  
V2Rocket
Rainman
Rennlist Member
 
V2Rocket's Avatar
 
Join Date: Jan 2007
Location: Rancho Cucamonga, CA
Posts: 42,460
Default

Weirdly, lots (most?) cars that come with a fuel damper do NOT have a vacuum reference on them.

Anyone know if dampers are pressure-specific?
Could you use a damper originally designed for say 65 psi with a 45psi regulator?
V2Rocket is offline  
Old 09-02-2018, 10:46 PM
  #18  
superloaf
User
Thread Starter
 
superloaf's Avatar
 
Join Date: Aug 2004
Location: Los Angeles, Nashville
Posts: 781
Default

Got a used damper and installed it so now the car is up and running with the damper. I got curious about the inner workings of the damper so I disassembled my dead one. Pics can be seen here:

https://rennlist.com/forums/924-931-...l#post15262014
superloaf is offline  
Old 09-02-2018, 11:18 PM
  #19  
Droops83
User
 
Droops83's Avatar
 
Join Date: Feb 2003
Location: Santa Barbara, CA
Posts: 1,180
Default

Originally Posted by V2Rocket View Post
Weirdly, lots (most?) cars that come with a fuel damper do NOT have a vacuum reference on them.

Anyone know if dampers are pressure-specific?
Could you use a damper originally designed for say 65 psi with a 45psi regulator?
The vacuum line connected to the pulsation damper in some Bosch Motronic applications is simply to allow a safe path for raw fuel in case of a ruptured diaphragm (into the intake manifold); there is no change in its operation with negative or positive manifold pressure.

While it is possible that there are different spring rates and diaphragm surface areas to account for different rated fuel pressures, I suspect that the primary difference between most contemporary Bosch applications is the location/configuration and type of fuel inlet and outlet fittings.
Droops83 is offline  
Old 09-02-2018, 11:49 PM
  #20  
V2Rocket
Rainman
Rennlist Member
 
V2Rocket's Avatar
 
Join Date: Jan 2007
Location: Rancho Cucamonga, CA
Posts: 42,460
Default

well that's very good to know, thank you.
that opens the door to experimentation...
V2Rocket is offline  
Old 09-23-2018, 01:54 PM
  #21  
V2Rocket
Rainman
Rennlist Member
 
V2Rocket's Avatar
 
Join Date: Jan 2007
Location: Rancho Cucamonga, CA
Posts: 42,460
Default

bump, this might work, off of 70s/80s Mercedes. they are still available.
these MB had 2-2.5 bar fuel pressure so should be OK for a stock-FPR 944/T
does not appear to have a vac connection though.

http://ecatalog.smpcorp.com/STD/#/ve...m/FPD50?type=s
V2Rocket is offline  
Old 09-23-2018, 03:54 PM
  #22  
Dave951
User
 
Dave951's Avatar
 
Join Date: Apr 2005
Location: Princeton, NJ
Posts: 833
Default

Originally Posted by V2Rocket View Post
bump, this might work, off of 70s/80s Mercedes. they are still available.
these MB had 2-2.5 bar fuel pressure so should be OK for a stock-FPR 944/T
does not appear to have a vac connection though.

http://ecatalog.smpcorp.com/STD/#/ve...m/FPD50?type=s
Is that a Bosch 0 280 161 007?
Dave951 is offline  
Old 09-23-2018, 04:28 PM
  #23  
Tom M'Guinn
Addict
Rennlist Member

 
Tom M'Guinn's Avatar
 
Join Date: Jan 2002
Location: Just CA Now :)
Posts: 10,639
Default

Originally Posted by V2Rocket View Post
bump, this might work, off of 70s/80s Mercedes. they are still available.
these MB had 2-2.5 bar fuel pressure so should be OK for a stock-FPR 944/T
does not appear to have a vac connection though.

http://ecatalog.smpcorp.com/STD/#/ve...m/FPD50?type=s
I have a '79 450SL so can check to see how close it is. It's at the upholstery shop for a while though, so will be a while. Looks like the primary difference is that it lacks the mounting bracket of the 951 unit. The Mercedes is a CIS car too, so seems odd that it would have the same style damper (but the appearance and similar Bosch numbers say otherwise)
.
Tom M'Guinn is offline  
Old 10-15-2018, 11:15 AM
  #24  
Michael Mclennan
New User
 
Join Date: Oct 2018
Posts: 1
Default

The Damper PART NUMBER 0280161007 90USD looks identical apart from the tab,,,

Can anbody confirm?????????

https://www.ebay.com/itm/Mercedes-W1...5:pf:0&vxp=mtr

Struggling with same issue everything is 400USD cheapest I can find on the net is from the UK for around $250USD. CRAZY for a part that 6 months ago was $80 !!!!!!!!!!
Michael Mclennan is offline  

Thread Tools
Search this Thread

Contact Us About Us Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: