Ferdl

One guy in Germany drove his 280hp CSR 170000 miles in 20 years: https://www.seven-ig.de/phpBB3/viewtopic.php?t=26292

Probably 360kg max load on front and 500kg on rear axle

The steering box seems to be from a Ford Escort MK2, built from 1974-1980. But for the Birkin the middle tube was shortened on the right side. That's why the tie rod boot on the left is standard Ford Escort MK2 but on the right side one from Renault was used (Part number 7701469497).

Has it ever been clarified which manufacturer (model/year/part number) the steering rack is from?

It seems the engine is a modified Duratec: https://www.totalkitcar.com/2025/09/18/new-engine-range-from-prodev-engineering/

I have a Fidanza flywheel in my Zetec and I had to get it balanced because of the heavy vibrations. My recommendation after 20 years Seven ownership: When using „performance“ parts the chances are great to get overprized crap, and that even happens when dealing with a company with a good reputation. So always check and measure the stuff you get, do NOT assume it is „ok“!

Thanks for the offer, but I already tried this. To have it under the tonneau changes the situation completely. I guess the distance and viewing angle also has a great influence. Next step will be to try different mounting positions.

I have this gauge in my Birkin and it is really nice - except that you can hardly read it in daylight, not even with a gauge visor.

As far as I can remember this was not checked at all. But this was 20 years ago…

When I had my new Superformance S1 inspected at the Ohio DMV in 2004 they only inspected the receipts and attached the assigned chassis number plates to the car. It was no problem at all, I even drove to and from the DMV with the car.

Papak were you able to find out from which car these CV joints came from?

900kg https://www.auto-motor-und-sport.de/fahrbericht/irmscher-7-selectra-immer-mit-der-ruhe/

http://fancytuning.com/2011/03/irmscher-7-selectra-electric-concept/

http://www.birkinperformancecars.com/

I run a JMT HJT12 with a high compression Zetec for 3 years now. No problems so far.