Jump to content
Sign in to follow this  

CDI+ Features

Recommended Posts


I recently purchased a CDI+ unit for my 1974 911 Targa from the folks at Pelican Parts.  I have been chasing a small exhaust backfire and low RPM bucking/stumbling issue for several months and bought the CDI+ hoping that it would cure my issue.  My original Bosch CDI unit was putting out about 150v at idle (measured with a direct voltage adapter) so I figured it was time for a replacement.  Unfortunately, it did not cure my issue, however, the engine has a different tune to it at idle (sounds stronger) and under high load and WOT it absolutely screams!  It feels like a completely different engine with the CDI+.  I couldn't be happier.  I finally bit the bullet and pulled my CIS and found a severely cracked and leaky air box.   A replacement box (and other bits) are in the mail, and I can't wait to finally get my issues resolved.  Thanks for putting together such a modern and elegant product!

I am curious to find out more about some of the features available in the CDI+ software such as: tachometer smoothing, adaptive multi-spark and distributor input smoothing.  I recently had my tachometer rebuilt by NHS but it still swings around more than I care for especially with high RPM shifts.  I'm told this is normal and due to the large dial and the design of the internal movement.  I am going to hook up the CDI+ to drive my tach and I'm wondering if the tachometer smoothing feature might settle my tachometer down a bit.  Any details on these features would be greatly appreciated.

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

About Classic Retrofit

Classic Retrofit designs and manufactures direct-replacement modern electronic upgrades for classic cars. The Classic Retrofit forum supports our products and the community installing and enjoying our classic car upgrades!

  • Create New...