Lacking enthusiasm....please help.......

[mrzigazaga]

What would you go for Martin...MS2?....I think for what it cost's then its probably the way to go...At the moment my efi system is being pretty reliable but in the future if it starts to fail which is pretty much a dot on the card then i wouldn't want to step backwards to carbs but forward to a better ignition and fuelling system..Programmable ECU and tweak able maps for optimum running...I would of thought this would be the route for most Supercharged cars as well...Ziga

[RCK974X]

adam quantrill said:

It's only a pain because the 4CU doesn't have a diagnostic facility and it runs dynamically, so it's quite difficult to diagnose the root cause of faults.....

Thanks - so apart from the 4CU, it's pretty much like all the other TVR issues with bad earths, wear and tear, and some pretty dodgy wiring practices !! Good to know....and just like my 2.8 !!

[RCK974X]

The Hatter said:

RCK, I'm not sure that the flapper system is truly 'bad' but for me it's the economics that are driving thoughts of megasquirt. I have a 27 year old car that defies all attempts to make it reliable; I have suspicions that both the ECU and the flapper unit are past their best, the wiring is dodgy and the ignition system has out of calibration advance springs and a very tenuous connection to the crankshaft position via a chain drive and bevel gears. I could attempt to replace all of the above with new/reconditioned items but I feel I'd be chasing my tail in an expensive and time consuming manner. That's pretty much what I have been doing for the last few years!

An MS system that replaces the flapper,ECU, distributer etc, that controls the fueling via a Lambda sensor and has fully programable ignition seems a very attractive proposition.

Come to think of it, the flapper system is 'open loop' and later systems that use Lambda sensors are closed loop control, so surely must be a huge improvement?

Yeah, I agree, as per my posts further up.
I was in the space of keeping the sensors and injectors if doable.

Note that the early Ford EEC_IV systems also ran open loop, bank fired, and fixed dizzy (so still slightly vulnerable to gear wear, but solid state trigger) with Bosch Vane/flapper(s) and they seemed pretty good, so having an EGO feedback isn't compulsory.

I guess it's all down to best reliable solution for the dosh spent, even including carbs.

There's quite a lot of stuff on Web about doing this kind of stuff, so good luck !

[c pryor]

adam quantrill said:

So... a wedge at 140 feels quicker than a Bugatti Veyron then??? ;^)

In July I was on an Airbus doing about 500MPH but it still did not feel as quick as my 350i at 60 (apart from runway acceleration of course!!).