Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Jul 2006
Location: S. Florida
Posts: 7,274
That ignition delay relay is only annoying if the car it's in has leaky CIS injectors. Otherwise you'd never know it's there.

A 930 with healthy CIS injectors does not run on, or stumble on one tiny bit after shutting off the ignition.

The factory felt it was a good idea and it's a good feature for diagnosing injectors that leak down fuel pressure stored in the accumulator after the pumps are shut off.
Old 12-02-2009, 01:02 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #41 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,563
Garage
Yes it can be a diagnostic tool of sorts but it's also one more thing to have a problem with. If your car is in proper tune you don't need it 'cause there is no excess fuel to burn off.
__________________
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 12-02-2009, 02:41 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #42 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,563
Garage
I've had a few emails asking me how this story ended so I thought I would post it.

Turns out I created several problems at once.
> When I pulled the injectors and cleaned them the fuel lines to 3 of the injectors began to leak. I had a devil of a time getting them to all seal. Once they stopped leaking the engine ran better but still not good.
> Injector #3 was dribbling and flunked the pressure test when we re-tested all the injectors after the 2nd engine pull. No idea why this happened. Replaced the injector. Engine ran a little better nothing great.
> After all the leaks and dribbles were fixed the engine would respond to fuel mixture tuning. I set the idle screw high enough to keep the engine running and then began adjusting the fuel mixture. After about 1/4 turn (90*) the engine smoothed out. I ran the enrichment up until it started to hunt, backed it off a smidge and set the idle to 1000rpm.
It runs very well now.

Took the car for a few long drives to get a feel for the new headers and all I can say is WOW what a difference. The range from off idle to boost is much more responsive and the engine more powerful. Where the tires used to haze or spin in second gear they now simply fry. I can be traveling down the road at 45mpg, stomp the throttle and light 'em up. Yes!

I got the AFR meter working after relocating the O2 sensor and all looked OK for the boost run. Now I need to get the LM-1 hooked up and see if the WUR needs a tweek before going to the dyno. Hope to do that this weekend.
__________________
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 02-03-2010, 05:34 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #43 (permalink)
Registered User
 
wjfk32's Avatar
 
Join Date: May 2008
Posts: 1,257
Congrats!!!!!!

Happy to see it work out. R u going to raise boost?


Walt
Old 02-04-2010, 08:27 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #44 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,563
Garage
Thank you Walt.
No, it is imparative for testing purposes that the boost remain the same. I hope to dyno very soon. It feels like more power was picked up than anticipated.
If anyone has a spare boost pressure sending unit I need one so I can add boost signal to the LM-1 readout.
__________________
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 02-04-2010, 08:55 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #45 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 04:56 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.