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fpr and fuel dampener on a 85 911
im replacing my fpr and dampener on my 1985. both parts are well over 1000. 00 dollars. i did some research and ordered the smp pr71 fpr. way cheaper. hope it works well. would there be a cheaper version of the dampener? it wasnt the hard to get to all the parts. i did take off a lot of the stuff on the top of the motor. im sure all the fuel and vacuum lines are original. i was thinking of doing all new fuel and vacuum lines . while im in there. any thoughts?
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07-07-2022, 03:39 PM
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Join Date: Jul 2022
Posts: 1
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Problem Description. A faulty fuel damper can produce a ticking noise, which can be heard inside the cabin when the engine is idling. Replacement of the failed dampener should correct this problem.
DNA HRBlock Sign in Last edited by Emily69; 07-08-2022 at 09:04 PM.. |
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07-08-2022, 01:56 AM
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i had this same issue in my 90 944 s2. it was burning so rich. plugs were black. then the idle starting going up to around 1500 then dropping back dow to where the car would almost stalling. back and forth for a while. i pulled the vacuum off the fpr and fuel what jump coming out. i replaced the the fpr. and still wasnt running right. then pulled the vacuum line off the dampener. and same thing. fuel was coming out. then replaced the dampener, and car runs great!!
so in the 911, i pulled the vacuum line off the fpr, same thing fuel was coming out. plugs are all black and running rich. all the trouble i had pulling the fpr out of the 911, i thought maybe just start replacving vacuum lines and fuel lines too and the dampener. i had the car since 2003, so im pretty sure everything is probably original. |
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07-08-2022, 10:16 AM
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83 911SC Cab
Join Date: May 2012
Location: CT
Posts: 954
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Adapt Motorsports makes beautiful replacements for both FPR & Damper. An adjustable regulator is a valuable tool, fwiw. I purchased both for less than a single damper, shipped! Below are pics of my 3.2 rebuild, no affiliation other than a very satisfied customer!
   
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07-08-2022, 01:12 PM
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83 911SC Cab
Join Date: May 2012
Location: CT
Posts: 954
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There is also 928 afpr, that is nice as well, but, does not solve damper on its own. Be aware that aftermarket regulators may require more pressure than factory, by design. I'm around 44psi static. No ill effects other than better atomization.
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07-08-2022, 01:16 PM
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83 911SC Cab
Join Date: May 2012
Location: CT
Posts: 954
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928's adjustable fuel pressure regulator
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07-08-2022, 01:19 PM
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Registered
Join Date: May 2008
Location: Grapevine, TX
Posts: 1,104
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Precision MotorwerksPrecision Motorwerks makes replacement FPR and Dampers that should work on the 911 as they are the same for the 928. One thing to keep in mind with the aftermarket dampers is that most modern cars are sequential injection instead of batch fire like our older Porsches. Batch fire requires a larger damper volume then sequential. most of the drop in units do not have the volume capacity to support it. the ones from Precision were specifically designed for our batch fire systems. You may have to call or email to get the details as his website is very limited. rennlist post discussing.
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07-08-2022, 02:25 PM
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