Yes, of course, mapping the timing is next step to increased performance. This test was the baseline.

It would be lovely to have the luxury of an engine permanently at our disposal, but unfortunately this is never going to happen. Neil is building and testing customer engines constantly. We get on the dyno when we can and then the engine is gone in a few hours to be installed in the customer's car. You'll see from the report that Neil gave up his Sunday for us for which I am very grateful.

Having said that, the next one that comes along we will endeavour to get on to timing adjustments and performance comparisons.


No, we didn't do that test on that particular unit. Neil would have detected any degradation of the Bosch unit on the dyno run. He knows these engines inside out having built hundreds of them.

Our 'butt dyno' feedback from 25 or so customers/evaluators tells us that statistically it is unlikely that all their original Bosch units have reduced output. If they have, it is a good enough reason to promote the CDI+ as a replacement unit anyway!

Jonny, Have you received any feedback from Dave at TRE Motorsports? He's our local Porsche hot rod shop here in Southern California.

Joe, I mailed him last night as he's had a unit for a few weeks now. Not heard back, perhaps you could chase him up for me!

I've been reading about the CDI+ unit for some time now, and was getting excited at the prospect of improving the ignition on the 1969 911S that I have owned for 27 years.
The car has been running well lately, and I have always loved driving it, but I have to say that the 160 mile round trip I made yesterday after having it fitted the day before is possibly the most enjoyable I have ever had in a total of 98,000 miles. The CDI+ just makes my engine sing! It is more tractable, feels more powerful and seems to run more smoothly. I have yet to have it properly dialled-in with a laptop on a rolling road, but it has already made an amazing difference. Nearly all of the mid-range 'fluffiness' has gone already, and it doesn't seem to matter anyway as the car pulls so much better. Perhaps owners of 'torque-lite' 2litre cars will feel it the most, but I'm sure that any car will be improved by the CDI+.

Every owner of a suitable 911 should seriously consider this unit. Just as we all know how great SSI heat exchangers are, I believe that we will come to consider the CDI+ to be just as essential an upgrade.

I hope this feedback is helpful to those considering buying it.

Chris


http://forums.pelicanparts.com/uploa...1458605019.jpg

Your car looks great Chris.my engine won't be ready until the summer.my cars a 1975 euro spec 2.7 with cis.Im very tempted to buy the Cdi+ has anyone out there had this fitted to a 75 cis.thanks.......Mike fitz.....

Thanks, Mike.

I'm sure Jonny Hart will be able to let you know if there are any 2.7s running the CDI+ as yet. Good luck with yours.

ATB,

Chris

Hi Mike,

Here is a list of all the model years we have run our units on so far:

1968 912 / 6 'T', carbs
1969 2.0T race car
1969 T stock
1970 ST
1970 2.2S
1973 2.7 RS
1973.5 2.5, E cams, PMOs
1973.5 Stock
1982 3.0 SC Race Car
1982 SC with webcams
1982 SC + 964 cams
1983 SC Stock
1984 Turbo
1986 Turbo

The two 73.5 CIS cars responded well to the CDI+. Cured some 'parking lot' speed shunting. More responsive.

My own car (and test mule) is a 1982 SC with CIS. Seat of pants feedback at the moment. Better throttle response and more 'grunt' in the mid range.

We are aiming to do a 'rolling road' dyno with a 2.7 later this week. Will post the results after Easter.

Thanks Jonny. I'm away for another two weeks.ill get in contact with you when I arrive back in the uk...Mike fitz

Hey Jonny, you forgot my '83 SC!

Still running strong with unit "001".

Mark

How could I forget test mule number 1!?

I'm curious about how the CDI+ would effect the performance of our torquey 78-79 SC's.
I believe the distributor rotor spins in a counter clockwise rotation and they have slightly larger intakes. Oh, and I just so happen to have a 78!

Hang in there Joe, we're going racing this season with a couple of SCs at Parr in the UK. Dyno runs once the cars are put back together!

All the latest photos / reports etc we put on FB.

www.facebook.com/ClassicRetrofit

Anyone got as US spec 2.7?

Dyno run today. Almost 10 ft-lbs more torque up to 4000 RPM. No timing changes.

https://t.co/NU0Nr8Q9Ci

SuperChips! Is Peter Wales still active there?

PS: Imporessive results! I have a 2.7 needing a rebuild. Hrmmm..

Here's some video from the dyno day with the US Spec 2.7

<iframe width="420" height="315" src="https://www.youtube.com/embed/uOFBeWa0eRg?rel=0" frameborder="0" allowfullscreen></iframe>

That tach needle bounced a lot but that was the only thing i wondered about. Looks great Jonny!!

Yes, the tach in that car needs some attention! It was even worse before the CDI+ went on. We can drive the tacho direct from our units so we can filter out some of the bounce but that one is beyond help!

The tachometer is mechanically dampened by a viscous oil filling in the seat for the needle axle. Typically these dry out over the years and then the tach becomes bouncy. Not much you can do about it other than getting it to a rebuilder.

Interesting info, had no idea it was oil filled. Is it possible to refill or does it need a new part?