View Single Post
16Volt 16Volt is offline
Registered User
16Volt's Avatar
Join Date: Oct 2013
Location: Seattle, WA
Posts: 982
Originally Posted by bpu699 View Post
Why the damage? Sounds like you had low boost?

How does one add knock sensors? Can't find anyone selling this for a 930?
The 3LDZ gave up the ghost initially, but before proceeding a leakdown showed a pretty bad cyl (there is a thread here somewhere I started).

I believe that the car was running more than 1.2bar in most street situations. I think this for a couple reasons -

1. The car usually would bang off overboost switch. When it was on the dyno the IATs were so high I think that that's why it was only seeing 12psi.
2. The TiAL the PO was running had two red springs, while that should equate to 1bar it does not account for the headers. TiAL wants you to run .2 or so lower than your target boost level if running running headers/free flowing exhaust.

There are a few different options for adding knock sensing. Now this is my opinion, but if you want to be safe and run higher boost levels, go to stand-alone. Do not pass go.

Now you can also go the route I chose (which I am already regretting and the car hasnt even started for the first time) and thats an XDI-2 system to handle ignition.

JS also I believe also makes a add-on system which can be used on a 930.
- 86 Porsche 930 - Mr.Hyde
- 86 BMW 635CSi - Dr.Jeykell
- 2006 Infiniti M45 Sport
Old 08-07-2017, 03:22 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #27 (permalink)