Not always the case that bespoke maps are better than oem in my view.
Depends on the mapper of course ,but to gain the last few bhp could mean the ignition is run too far advanced for comfort .
I’m sticking with OEM Lotus map in my S2 for instance.
…
I realise that an S1 is a different case to mine,but all I’m saying is if it were me having mapping done I’d ask the chappie to err on the side of caution .
I’ve heard a few tales of detonation on the way home from the dyno …
[quote=jfk]Not always the case that bespoke maps are better than oem in my view.
Depends on the mapper of course ,but to gain the last few bhp could mean the ignition is run too far advanced for comfort .
I’m sticking with OEM Lotus map in my S2 for instance.
…
I realise that an S1 is a different case to mine,but all I’m saying is if it were me having mapping done I’d ask the chappie to err on the side of caution . [/quote]
I wouldn’t say bespoke maps are better either, just that a lot of custom maps are not brilliant.
The map in my car is not bad, just not great - Runs a little rough when cold, bogs down at very low rpm (too rich), can be jerky under partial throttle and a bit of over-run at low rpm. Great when WOT on the dyno though!
I’m hopefully going standalone with the syvecs ecu over winter. Not particulary for the power, but for the drivabality with the mapping and also the engine safety features. Also going to try the 1000cc injector dynamics -hopefully to sort the fueling out at eitehr end of the rev range.
You can’t beat a bespoke map, by an expert - fullstop!
Azrael - I thought you used an Omex ECU in your race car?
[quote=Mr Pesky]You can’t beat a bespoke map, by an expert - fullstop!
Azrael - I thought you used an Omex ECU in your race car? [/quote]
Yep I did in 2003-2004
[quote=Mr Pesky]You can’t beat a bespoke map, by an expert - fullstop!
[/quote]
Really?
What for ? safety or power ?.. there has to be compromise somewhere …
Saying a bespoke map is a fix all panacea don’t work for me …
Then I would say that cos the bespoke maps fall short of my oem 260!!!
Fullstop !
This is the S1 VHPD forum section, not the Elise Coupe forum section - comprendo? 
This much is true. The real advantage with Emerald is there’s a tonne of basemaps out there that should cover 99% of Ks out there and will be 90% optimised for any given engine… pretty much a plug-and-play solution.
Given how badly-mapped the Lotus OEM ECU is, I’d wager that an emerald with a basemap on it is PROBABLY going to be better than the stock ECU. With some dyno time, further gains can be made and then things really pay dividends… but here is where lots of time AND MONEY need to be spent with the right people… a bad tuner will result in a bad map (or a blown engine!), a good tuner will make the car as easy to drive as a family hatchback with bags of power and without removing the “grumpy bitch” character of the car.
Here’s mine on the dyno getting some initial break-in and mapping work done:
[video:youtube]SEXIGE Dyno Runs - YouTube[/video]
Really it’s a shame we can’t map the stock ECU as it’s actually a VERY smart piece of kit from what I understand. If they could be better tailored to the VHPDs (which seem to be very variable in themselves) then I’m sure the stock ECU would be good enough for 90% of Exige S1 owners.
You could spend �10,000 on fitting a top-end MoTeC to your car and wiring it in like I’ve done with mine and end up with an unreliable piece of rubbish that doesn’t run right if you don’t invest the time in getting the right person to tune it.
To put this into perspective, here’s the cold-start and idle on my car, which is a 220+bhp K… still nice and angry, but without the histrionics that many people seem to suffer:
[video:youtube]SEXIGE returns home - YouTube[/video]
And here’s the same engine warm-starting and track-driving while on the run-in tune (so limited to 6500RPM and not tuned for maximum power)… you can see how well-behaved the thing is when just cruising around the track on light throttle.
[video:youtube]SEXIGE's first track outing (Take two!) - YouTube[/video]
The engine management and wiring cost me a packet… but I’m glad I spent the money and time here in retrospect.
Oh, and just to add… the way my engine works with the stock Rover K crank trigger but with sequential injection, the engine needs to complete 540 degrees of cranking before it’ll put fuel and spark in. This is to allow time for the crank and cam signals to sync up. I could improve this by using an aftermarket chopper wheel on the crankshaft, but I wanted to keep it as OEM as possible (tidier).
Lalalala …not listening
Easy there cheeky 
How have you got the wheel sensor problem related to the ECU itself?
I occasionally get the issue but have always thought it was due to the connector at the hub not being properly waterproof and so allowing water ingress - evidenced by the state of the connectors when disassembled.
I’ve also wondered why the Emerald ECU has not been sold with a converter cable to make it truely plug & play?
If you have not guessed I’m in the luddite camp on this one - but know when we have discussed it previously the issue of cost has always been mentioned. Adding it all up, including dyno time, it’s notone of the most cost-effective of Exige mods.
How have you got the wheel sensor problem related to the ECU itself?
I occasionally get the issue but have always thought it was due to the connector at the hub not being properly waterproof and so allowing water ingress - evidenced by the state of the connectors when disassembled.
I’ve also wondered why the Emerald ECU has not been sold with a converter cable to make it truely plug & play?
If you have not guessed I’m in the luddite camp on this one - but know when we have discussed it previously the issue of cost has always been mentioned. Adding it all up, including dyno time, it’s notone of the most cost-effective of Exige mods.
[/quote]
No I think the issue was with the wheel sensor or wiring, but the Emerald does away with this feeding into the ECU.
I guess the relatively small production run for the Exige maybe the factor against the conversion loom being productionised.
To be fair Steve, what mods to a car truly are ‘cost effective’
You will start harping on about driver training next!
Now be fair…that’s really a cue for Pesky
Its Tuesday morning mate. You need to change ‘cue’ for ‘queue’ as Pesky will be standing in one at the post office collecting his weekly gravy tokens.