Firstly, what Cossies had closed loop as standard? Did late Saffs have it?

Also once closed loop is added, does it matter if the spec is then changed? From my understanding it is only for off-boost driving therefore changing the spec/parts after it is added will not affect the way in which it works? I.e. Its not like a live map as such that is spec dependant.

Cheers

 

AFAIK, closed loop came std on greentop saffs ( due to the introduction of cats), BT and ST Escorts. Worked fine on std engine/management, but due to lack of knowledge/skill/ 99% of aftermarket chips simply binned the feature as it was not needed to make power, hence a lot of people still think anything bigger than greens cause borewash, and you have to run a tuned cossie at 8% CO ...

and again, AFAIK, stu can run closed loop on 1000cc injectors and still get it to almost an MOT pass on emissions WITHOUT a cat , the main things that cause the closed loop not to work is huge ports in the head and lairy cams, belive ( and someone correct me if I am wrong) that closed loop is unavaliable on cams bigger than BD10's? Still a great mod though Also, the closed loop can only "trim" the fuelling within a certain percentage of it's base figure, so say the injector duration is 0.30 millisecs, the closed loop system can only alter this by 15% either side of that figure, so any big mods and the ECU won't be able to move the injector duration far enough to compensate for big changes....

 

Excellent info cheers.

Does that mean properly set up stage 3 4x4 Saffs would still normally have working closed loop?

 

no....most tuners dont enable the closed loop.....k plate onwards were closed loop.....as std,but if the chip was changed for a non closed loop one it wouldnt work obviously

 

Nope, only MSD have this facility

 

stus old taxi
T34.63 Hybrid Turbocharger with Garrett -34 Actuator
Siemens 55lbph BLACK injectors
Closed loop fuel control on genuine FORD lambda sensor
Wasted Spark conversion the full spec is a flying machine
HKS EVC V Boost control system on the dash. 3 levels of boost(14/24/34)

 

There are masses of tuned cossie out there with working closed loop, a lot do closed loop with EGT combined for the ultimate, but then they don't use the antiquated std ecu, whose only place these days of tighter emissions is in the bin.
tabetha

 

ohhhhhhh quick everyone throw there L8 in the bin cos tabetha says its shite......

its a dam good ecu if the right person is using it,and id put money on a closed loop live mapped L8 being able to meet any emissions regulation in the world if it was mapped to do so.....

even your golden aftermarket ecu is only as good as the mapper.

 

really dont get what tabetha's issue is, every mention of a webber ecu and he says go aftermarket.

 

FPMSL

 

Ahmed can enable it as well .

 

Good time for block button then Ryan?

 

Exactly. Everyone waffles on about how MSD are like the 'closed-loop gods' but other tuner(s) have been doing it since 1992! This is in no way disrespecting MSD but I think some peoples views are a tad skewed on this.

 

For the disbeleivers, ask yourself why a perfectly good ecu has been replaced FOUR TIMES.
My "ISSUE" is by the time you have done all the mods to get a half decent functioning ecu, you have still spent more than aftermarket one, that has LOADS more features, bit like paying £100 for cheng shin tyres , instead of £50 for eagle f1's.
Some on here have to realise this is a PUBLIC forum, and stop this the sun shines out of MSD's arse all the time.
Oh and jtech next time you are on the phone to MSD ask stu why he reads what is written by my "favourite tuner", and why he has bought his book, the answer will surprise you, stu does not know everything, no one does, we can all learn from each other, especially on a public forum.
Stu is a immensley clever man, if I knew a fraction of what he and certain others have forgotten that would be lots more than I know now.
tabetha

 

So if Stu has forgotton more than you know, whos opinion should the masses trust

Stus Obviously

 

How the fook did this simple question somewhow descend into a kill stu topic?

 

Im not moaning i pulled 38mpg last year stuck at 70mph to fordfair on a T34.55 Blacks on a Off the shelf Stu Chip

So use whatever you lot like, but closed and wasted on my P8 is cock on, (until my P8 Breaks)

 

As above 38 mpg with t34.63 blacks and off shelf chip om my saph.

 

That and the other examples sound very good. Iam going to start looking for a Saff I think

Thanks for the info

 

FACT most cossies run L8s as the 4x4 saff was the most produced cossie...over 12k produced iirc.

FACT to get an L8 to run closed loop its a chip and a lambda sensor.....how is that comparable in price to an aftermarket ecu? you still need to buy a lambda sensor,loom,ecu,mapping, labour time etc etc ...how can you possibly even try to compare costs?



we can all learn from each other....mmmm, i wonder what the guy learnt from you on the national bb site, when you told him to bin his std ecu and go aftermarkt because he asked.......what his fuel pressure should behttp://bbs.rsownersclub.co.uk/showthread.php?t=143544





and what has any of what youve said had to do with the question asked at the top of this page?

 

It does high light some areas though, I was under the impression closed loop was expensive? Not so if its just a plug in chip?

If it is in the region of the £600 I have heard then perhaps another ECU would be worth considering but then I was always led to beleive the transient fuelling was very good on L8's?

Not trying to start/continue an argument just like to know, thanks.