The V8 Owners Forum -

Thanks for the info guys but being a Westfield with custom built exhausts there is no boss in the exhausts to screw in the sensor.

Simeon wrote:Thanks for the info guys but being a Westfield with custom built exhausts there is no boss in the exhausts to screw in the sensor.

Easily rectified

Simeon wrote:Thanks for the info guys but being a Westfield with custom built exhausts there is no boss in the exhausts to screw in the sensor.

A half decent exhaust specialist will fit one in situ. It can have a screw in blanking plug until needed.

I agree that an exhaust gas analiser is the way to go but it is possible to set the cruise AFR up without one, basically you just keep leaning the mixture of by using various primary jet and rod combo's until the engine response goes bad, you then just go one stage richer. Of course this still leaves the acceleration and WOT circuits to be sorted out!


First thing to find out would be what is the setup of your carb now, if its as per the factory setup then it will be very rich on cruise on a 3.5 lump.

I have found that most 3.5 engines can be leaned off around 8 percent on the cruise setup. This would be done using 86 primary jets (standard) and 67-55 rods. I'm not saying 100% that this is what your engine needs!

Your mixture needs to be right for the health of your engine, your ignition needs to be right (needs to suite the Eddy 500) also for the health of the engine and to give good MPG.

kiwicar wrote: Post the results on here and there are several chaps on here (muscle manta, sidecar & spend for instance) who are very knowlagible on setting up 4 barrel carbs and can help you with recommended set ups based on the information you get from the lambda sensor. Mike

Hi Mike,

Just spotted the above...Cheers!

To the OP, this may sound really bad but your statement of 'my tuning knowledge is nil' put me off a bit! I don't want to encourage you to pull your carb apart if you really don't have a clue, it would not be fair on you!

Anyway, these carbs are easy to work on really, I actually do think that 'most' rolling roads are a waste of time and money, they don't have the jets and rods required and they don't know how the carb works. (I said 'most' there could be a RR operator that does know!).
The other thing with a RR operator is that they usually only are interested in the acceleration mode and WOT mode which is only half the story anyway. Lets face it with all the traffic most of us end up running on cruise for 90% of the time.

Have a read of this gumph on carbs (The bit under the fuel pump stuff). I have changed my mind over one or two bits in the article but I still think that it explains how one of these carbs works pretty well.....

http://how-to-build-a-pilgrim-sumo.wiki ... ing-system

Also have a read of this on ignition (The bit on Lucas dizzies)....

http://how-to-build-a-pilgrim-sumo.wiki ... by-members

DaveEFI wrote:It could be because they are the market leader, but I see lots of reports of problems with the LC1.

Just wondering what sort of problems as I'm thinking of buying one for my Megasquirt MS2 system (instead of using the standard NB LandRover sensor.

richardpope50 wrote:

DaveEFI wrote:It could be because they are the market leader, but I see lots of reports of problems with the LC1.

Just wondering what sort of problems as I'm thinking of buying one for my Megasquirt MS2 system (instead of using the standard NB LandRover sensor.

They don't like being located near anything that generates strong EMF such as the HT coil or HT leads that's for sure. I've blown one unit because of this.

I would go with Techedge, Zeitronix, Dynojet etc (all reliable products) I have an Innovate LM2 full kit myself and although I am happy with I had problems initially with it until a firmware update cured it from freezing(I hate products that are released that don't work from the off) if you look at the forums they don't deal with peoples problems promptly in my opinion or post's just get ignored lots of failed units & unhappy punters ("-") I would not buy another Innovate product to be honest.

I went for TechEdge because they do a DIY assembly unit (rather Like MS) so the circuits and software etc are available. The sort of thing most other makes try to keep close to their chest.

As usual, many thanks.

As usual, pays your money and get what you paid for, I guess.

I also went Techedge DIY. Works fine for me. - Also gave me an LCD read out of AFR
The sensor placement is important with a WB sensor. Normally the bung from a NB sensor will be too close as NB sensors aren't heated. Have a look on techedge's website at the document about sensor placement.
Also WB sensors must always be powered up when they are fitted in the exhaust and the engine is running.

Tom.

SuperV8 wrote:I also went Techedge DIY. Works fine for me. - Also gave me an LCD read out of AFR
The sensor placement is important with a WB sensor. Normally the bung from a NB sensor will be too close as NB sensors aren't heated. Have a look on techedge's website at the document about sensor placement.
Also WB sensors must always be powered up when they are fitted in the exhaust and the engine is running.

Tom.

Most NB oxygen sensors even the old school Lucas Hotwire one's are heated probes, just a heads up really , the WB probe should never be located at the bottom of the exhaust where condensation/water can build up they don't like that

Anyone using MSDs new Sema award winning self learning Atomic EFI throttle body kit?

Supposed to be extremely simple and easy to fit with only a few sensors.

www.msdignition.com/default.aspx?id=12884902184&blogid

Robrover wrote:Anyone using MSDs new Sema award winning self learning Atomic EFI throttle body kit?

Supposed to be extremely simple and easy to fit with only a few sensors.

www.msdignition.com/default.aspx?id=12884902184&blogid

Wouldn't a better name be carburettor?

I've spotted the AEM Inline wideband controller (30-2310) at http://www.efi-parts.co.uk/index.php?productID=257 and just wondered if there are any general comments on this one as it is a good price (to connect to my Megasquirt MS2).