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MG MGB Technical - Moss EFI

I searched the archives and didn't find much,has anyone put on the Moss EFI for the MGB?
Since this #$^%^% state is going to make me smog my '79B every year I'm thinking of putting on the EFI.
Any pros and cons about it?
Thanks pat
patrick bailey

Patrick

Move to WA(USA) - no smog test ... in fact no safety tabs either! That way you dont have to pfaff about with an EFI either!

Paul

Paul Barrow

Paul I sent you an email, but for all those who read this I had a 77 B and I installed this, I had looked at a super charger as it was either or, you could not fit the EFI with the super charger, I made the choice to go with the EFI and I was certainly not wrong in doing this there were only pros to this the car started right away no choke, I felt that there was increased performance of more than 10% and the most important was the car became enjoyable to drive I loved to get into it on the weekend and DRIVE it, it was smooth and I had the feeling of a classic but the drivability of a modern car, with out damaging the engine or the looks.
If anybody would like any more info on this please do not hesitate to contact me, on my last thought, I would also recomend having the EFI profesionally installed.
Thanks.
Lawrence Sher

If I am correct, one of the reasons MOSS did the EFI was to help the CA cars pass smog.

I know they did get it approved for CA. How does that work as far as when they look under the hood? Do you have some paperwork that shows the system is accepted for CA?

BEC Cunha

BEC is correct. According to Kelvin Dodd with Moss the system was developed solely to help pass California emmisions tests and was not expected to give any performance improvement over a well tuned ZS. I'm not surprised that Lawrence noted improvement in performance as well as driveablitiy though. Kelvin didn't say about the inspection, but I would think that there is probably a plate or sticker on the unit that shows it is CARB approved. Check the Moss Pub bullentin board site http://www.mossmotors.com/Forum/ there was a thread about this last month and Kelvin reguarly posts there.
Bill Young

Bill correct there is a sticker that is put on as well as when they had completed the install the technician then went ahead and had the car smog tested, the car past with flying colors, as I said I was not sorry that I installed it and if any one was thinking of using the EFI I would highly recomend it as I stated earlier it was the BEST improvement I ever did.
Thanks.
Lawrence Sher

Ok now im curious if any of you who have EFI have fitted are thinking about fitting EDIS or currently have both installed...
James

I installed a Moss EFI system on my 76 MGB. I would not have done it, but I live in California. It does run OK - Moss has definitely solved a cold start problem. It is expensive though. My other alternative was to put in a Weber and headers and change to stock at smog check time - but that is a hassle. One problem I had was I installed it on an engine which had been running without the smog equipment. When I installed the smog equipment I had a lot of problems as they were not functional. I had to change the gulp value, check value and catalytic converter as they were all non functional.
r. LEARY

> over a well tuned ZS.

When was the last time you saw one of those! ;-)
Rob Edwards

It would make an interesting tech session at MG 2008 if someone coule arrange to have a smog test set up. I would love to know how my 67 GT does.
BEC Cunha

FWIW, the 79 with a "clip in" cat ( a 17 inch section of tailpipe just after rear axle was cut for the yearly "clip" on of the cat piece) passed Nevada smog with no adjustments except a loosening of the valve lash-to 20k. The car features a purpose built sc long block including a Burgess flowed sc spec head, rollers, and a P 270 cam. Because the efficiency is high it easily met the CO and NOX required. Although Nevada, as does California, does have a "visual inspection" aspect to the smog, I make sure the shop I go to understands my need. Finally, last year I converted to Classic Plates which allows me to pass on the yearly smog!
This is the first high praise I've heard from those trying the Moss EFI. This is all good news!
A young new company, Extrudabody.com, is prototyping a performance EFI for the siamese MG head, and I'm continuing my quest on the EDIS for same. Cheers, Vic
vem myers

Moss EFI is CARB approved and smog legal for 74 1/2 to 79 MGB (not sure why 1980 is not covered). With the CARB sticker you will need to go to a "test & repair" station as "test only" can't do modified cars.
If your old ZS was running rich and "glowing" the Cat. you should budjet for a new cat as well.

M Mallaby

It's amazing to me the state of California rolled back it's exemption for classic cars, drawing the line at 1974 I think. I mean come on, what are these cars driven in one year, on an average, 2-3k miles, max! The contribution to global warming and smog level is so negligible. Further, our cars are generally in top mechanical condition, not like the 77 Falcon, running 4 of 6 cylinders down the hiway spewing the blue at a prodigeous rate! Vic
vem myers

It's the 77 falcon that is giving us more trouble than the well kept 74. After the 25 year oops then 30 rollover stated the state knew if they ever did exempt any smog conrolled cars the jienie would be out of the bottle and they would be stuck with how to deal with these "newly exempt" cars. I think they never intended to exempt post 74 cars and were just putting off the enevitble to get the legislation passed. However I do live in SoCal and do like clean air so I have a huge catalyst under my EFI V8 MGB.
M Mallaby

I wonnder if there's a black market for those "CARB stickers"? You could do one of cutting edge EFI setups ( Jenvey, TWN, Extrudibody), slap the CARB on and forget about the yearly struggle to pass smog!
vem myers

You don't understand.

Legislators have to APPEAR to be accomplishing something. Preferrably a small voting block.



Dan Robinson

Here's the text of the actual Executive Order for the moss efi:

http://arb.ca.gov/msprog/aftermkt/devices/eo/D-453-4.pdf

Should give you some idea what the mechanic will actually see. He has a list of what to look for and what's removed but he doesn't have a serious technical drawing. They just sort of assume that he can figure it out.

Fake CARB EO stickers used to work - I once had a mechanic steal the EO tag off of the weber carb on my Volvo - but today we have an Internet, so the mechanic will likely just look up the eo itself. Just telling him the number is as good as having the sticker, so there's no point in trying to steal a sticker.

If your intent in getting the sticker is to pass your non-moss efi as a moss, well, it might or might not work, and it might or might not get you in trouble. Really depends on the mechanic.

What I'm hoping is that Moss or whomever turns out an updated FI kit that allows the use of headers, still smoggable but not using the dreaded late model exhaust manifold... just a dream for now. A fuelie supercharger? Hmmm... I can feel my wallet getting lighter already :)
Sam

This thread was discussed between 19/07/2007 and 07/08/2007

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