Fuel injector refurbishment
07-19-2008 | 10:15 PM
#1
Thread Starter
Nordschleife Master
Joined: Dec 2006
Posts: 5,405
Likes: 74
From: S.E. VA
Fuel injector refurbishment
Just got my injectors back from Witchhunter along with their before/after report, below.
Thought some would find this stuff interesting.
I was a little surprised at the variances. (The numbers guy in me is excited by now having 'balanced' injector flows. It's a guy thing, I know.)
They went out USPS on Monday. Got them back today (Sat). All the removed guts and pieces are returned in a separate bag.
I believe the injectors are originals, and had most of their gas from CA & WA gas stations, the car's been DE'd, and it's now 100k miles & 15 years old.
If wanted, I can post before and after pictures, but they're pretty much exactly what you see at the Witchhunter site. (Your injectors look like the "Bosch top feed" pictured top of the web page, on that link, above.)
They bead blast off the black paint on the injector body during the refurb, so now I'll respray it -- silver!
Thought some would find this stuff interesting.
I was a little surprised at the variances. (The numbers guy in me is excited by now having 'balanced' injector flows. It's a guy thing, I know.)
They went out USPS on Monday. Got them back today (Sat). All the removed guts and pieces are returned in a separate bag.
I believe the injectors are originals, and had most of their gas from CA & WA gas stations, the car's been DE'd, and it's now 100k miles & 15 years old.
If wanted, I can post before and after pictures, but they're pretty much exactly what you see at the Witchhunter site. (Your injectors look like the "Bosch top feed" pictured top of the web page, on that link, above.)
They bead blast off the black paint on the injector body during the refurb, so now I'll respray it -- silver!
07-20-2008 | 12:58 AM
#2
Drifting
Joined: Jul 2005
Posts: 3,363
Likes: 24
From: NY, USA
I agree, the numbers are interesting. Here are mine at just shy of 17 yrs and 60k miles for comparative purposes.
https://rennlist.com/forums/showthre...ay#post4377464
https://rennlist.com/forums/showthre...ay#post4377464
07-20-2008 | 01:19 AM
#3
RL Community Team
Rennlist Member
Rennlist Member
Joined: Oct 2003
Posts: 7,474
Likes: 631
And mine a year or so ago...
https://rennlist.com/forums/showpost...6&postcount=25
I think everyone with a 964 ought to do this service considering how old our cars are, and how crucial proper fuel delivery is to performance.
https://rennlist.com/forums/showpost...6&postcount=25
I think everyone with a 964 ought to do this service considering how old our cars are, and how crucial proper fuel delivery is to performance.
07-20-2008 | 01:23 AM
#4
RL Community Team
Rennlist Member
Rennlist Member
Joined: Oct 2003
Posts: 7,474
Likes: 631
I just noticed I repeated myself from post #10 of this:
https://rennlist.com/forums/showthre...ay#post4377464
... oh well
https://rennlist.com/forums/showthre...ay#post4377464
... oh well
07-20-2008 | 09:00 AM
#6
Thread Starter
Nordschleife Master
Joined: Dec 2006
Posts: 5,405
Likes: 74
From: S.E. VA
Geoffrey, they say they bead blast on this page.
But I get your gist.
They probably blast 'em purely for cosmetic reasons: ultrasonic may do such a number on the original paint -- that sending back injectors w/ a tattered, beat up paint job ain't the best way to make a happy customer!
Garrett, finn -- Where do think I got this idea? -- You guys!
Thanks for your past postings on this for lighting a slow fire under my ***...ignment.
But I get your gist.
They probably blast 'em purely for cosmetic reasons: ultrasonic may do such a number on the original paint -- that sending back injectors w/ a tattered, beat up paint job ain't the best way to make a happy customer!
Garrett, finn -- Where do think I got this idea? -- You guys!
Thanks for your past postings on this for lighting a slow fire under my ***...ignment.
Last edited by elbeee964; 07-20-2008 at 09:18 AM.
07-20-2008 | 01:05 PM
#7
Drifting
Joined: Jul 2005
Posts: 3,363
Likes: 24
From: NY, USA
Attached is an xls spreadsheet with the numbers. A bit more work than it's worth, actually!
If you save the file with the name Injectors.xls you'll be able to open it in Excel and see two sheets. Sheet 1: results as posted. Sheet 2: column format for easier comparison. With averages.
Cheers,
Dave
If you save the file with the name Injectors.xls you'll be able to open it in Excel and see two sheets. Sheet 1: results as posted. Sheet 2: column format for easier comparison. With averages.
Cheers,
Dave
Last edited by dfinnegan; 07-20-2008 at 03:22 PM. Reason: Added some averages on sheet 2
