AK 1106 rework ...

[REV]

Uwe,
   
   Beautifully done, you've even got a nice "AC" tool roll.
   
   :-)

[French Frie]

beautiful job, Uwe [:p] !
   
   I'm very interested in your PU bushings research, as I plan to overhaul my drivetrain this winter...provided we have the same set-up !

[westcott]

Gentlemen, good too see that you like the result, thanks.
   
   I hope it is still a MK IV even with the modifications i worked out.
   
   Is it O.K. for you  if i go ahead posting updates and keep you informed  or is it just an additional  rework story?

[cobham cobra]

I’m finding your thread interesting and would be happy if you continue to post updates and photos. I am particularly interested in how you progress with the PU bushes and overhaul of the rear suspension.
   John.

[westcott]

The first 400 Km trip is done without any problem.
   The engine made me smile even with a rev max of 3000 rpm I try not to overrun or the first 1000 Km. We had a cobra meeting (yes, 99% resin body kit cars) last weekend and it was fun to push the car through the small winding roads.
   
   It handles very well but feels like it needs just a bit more toe in at the front. I will check it after the bushings all around are replaced by my PU kit.
   
   The Atomic EFI is so easy to install and prepare, it is unbelievable. The thing is learning all the time by itself and the car has a lot of punch out from 1000-1200 rpm or just above even in 4th gear at low speed.
   
   The valuation report requested by my insurance company is finished by Classic Data. The car is rated as a "1" and the value starts with the same number :-)
   
   As a conclusion after all the work: I can't get this grin out of my face.
   
   Uwe

[MkIV Lux]

Super job, Uwe. Congratulations!

[AKL 1333]

Yes bloody well done hope to see the car at one of the internationals or sometime in Germany
   Jürgen

[French Frie]

congratulations, Uwe ! and your feedback regarding the Atomic system is very interesting...would you see any drawback (apart from its cost) ?
   and remember, I'm interested in your PU bushings research [] ...

[westcott]

Olivier,
   
   if you have a EFI fuel setup with fuel pump, return line and adjustable pressure regulator in the engine bay  you can buy the base kit for about 1900 USD.  If you order via Gooze Garage in the Netherlands the delivery will be fast and easy to your home adress without any customs problems.
   
   But if you dont modify your engine hardware wise it makes no sence to change to a atomic.
   
   Only if someone plans to upgrade or modify the engine for more output it will be a very easy way to add EFI without the needs to program new chips or EFI updates and to switch to the  clean look of a carburetted engine.
   
   The price or the base setup will be more or less the same amount in Euro I assume.
   
   Ups, I forgot that we normally NEVER assume !!
   
   Uwe

[REV]

I have to say that I love the look of the carburettor efi. You would seriously struggle to know that its efi at all.
   
   Mine has a TMS weber style kit on. My last car was carburettors and was no where near as easy to start or fuel efficient as this one. The power output was probably similar as well but from a larger engine and an extremely thirsty one as well. The current car on the run to Stonor Park achieved 25mpg, amazing to my mind!
   
   Where the Atomic scores though is by self calibrating. According to the gumph it monitors your engine and your driving and adjusts the efi to suit the car and you. Thats seriously clever if it does what it says on the tin. My car needed to be calibrated on the dyno and then again after installation by rolling road. Thats an expensive day out when you have specialist engineers and rolling road owners to pay! This appears very easy to fit and a simple solution to making your car a lot more user friendly. I suspect a lot of people will be asking for updates on this unit and it's performance.
   
   Definitely worth looking at if you have any issues with your carburattion, want more power or just an easier life.
   
   Heres a pic of my efi, pretty, but an awful lot more trouble to set up. You also need a return feed back to the tank.
   
   
   

[westcott]

Definitely agree to Nick's statement.
   
   Just one thing, in theory the MSD works returnless, until today i does in my car but I'm expecting more troubles when I will be in heavy traffic on a hot summer day in the future. My experiance is based on late summer and early autumn days.
   
   The engine bay of the MK IV is quite tight and the headers apply a lot of heat into it. Maybe the fuel will heat up earlier and quicker as it does in larger US vehicles it was tested in.
   
   I will report in the future if i need a return line or not, anyway my tank is prepared for one.
   
   The atomic A/F ratio is not based on a existing fuel map as it is with other systems.
   The EFI tries to create the correct A/F ratio according your basic adjustments and sensor inputs in "real time". Those real time measurements are stored in the ECU. So more and more different situations are collected allways, you feel it after a long trip. The engines reaction to the pedal feels smoother and better the more you drive.
   
   My experience up to day, I'll keep you updated.
   
   One drawback: The limitation for the camshaft character, real hot cams don't work with it. It is limited to a max cam duration of 250° at .050 lift.

[westcott]

We had a perfect weekend the week before and I used it to get some last pictures from the very short 2012 season.
   
   
   
   
   
   
   
   

[westcott]

I have some small update for the Atomic EFI as promised. The Atomic was installed in two cars the same time for the first time.
My one goes with a returnless fuel system. Until now i have more or less 1000 Km with the Atomic with no hassle, fast throttle response and without any variance from the default settings for A/F ratios.
   
The other car uses a given EFI line installation used with a mass flow setup before.
This car came back from a trip to northern Italy where it went up and down the mountains. The highest point was 2500 Meters, the hole mileage with the Atomic setup is now close to 3000 Km.
   
This engine is equipped with a cam close to the highest limit MSD allows for this system.
The owner is very enthusiastic about the self learning functions and has absolutely no problems up today. He was playing with the handheld, connected to the extension cable which came with the kit, the whole trip and found out that the setup has a lot of experimental potential even if you can't influence the base fuel maps.
   
From today's point of view we both don't regret the purchase.
   
We will keep you updated. If you have specific questions, just ask.
   
I couldn't resist to post this picture, the "snake" was lying in the trunk as I bought the car, it will stay with it..
   
The picture was taken during the last Cobra IG event this year. The Cobra IG is the German Cobra Club, the MK IV was not shy to meet all the plastic snakes and some Kirkham cousins.
   
Uwe
   
   

[westcott]

A late happy new year to you all.
   
   I'm going to rework my front and rear suspension bushes where needed and need some support
   
   First thing I want to get rid off is the noisy, squeeky, rear end. I'm shure that I have read some posts about this noise problem and how to solve it here in the forum but can't find the posts anymore.
   
   What causes the squeek noise at the rear suspension?
   
   Uwe

[westcott]

Today was my first "Garage"day this year and i started  to disassemble the rear suspension. All rubber bushings will be replaced by PU inserts and all rubber covers for the uniballs and damper mounts need to be replaced.
   
   But first i have to dig myself through the thick grease covering everything....
   
   The upper a-arm is out and cleaned, the PU inserts fit quite nice just the inner tubes have to be shortened.