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Unichip or similar for the turbo?

1K views 29 replies 10 participants last post by  muppet 
#1 ·
Does anyone have usable info about installing a piggyback chip for the LET?
We're talking dyno-mappable stuff here.
I'm sick and tired of getting my ignition and fuelling knackered every time I make a change (and I intend to change a few things in the future)

cheers, guys...
 
#6 ·
If you dont mind paying a RR do re-map it then UniChip is best compromise between cost and use.

The Unichip will control the fuelling and ignition in a 3D map using 17 RPM sites between 500 and 8000RPM and 12 load sites between zero and WOT for each of these 17 RPM sites.


The extra module you can get contains a built in MAP sensor for boost monitoring. It works with the UniChip to give you spot on fuelling and timing throught the rev range.

The boost module can also be mapped to your needs with the ability to program the amount of boost you want every 400RPM or so e.g. you can have it allow 20psi upto 4800RPM then have it only allow 16psi after that etc.

The boost module has an 2.5bar absolute MAP sensor so will allow you to run up to 22psi constant boost which, as you know, will be good for 350-375BHP easy on a uprated turbo (K26 etc)


You could go for an MBE but its a LOT of cash for what you need. The Unichip has full 3D mapping and wastegate control (thru the boost module)


They are ready to release the new model of Unichip which allows you to store 2 complete maps on the unichip so you could effectively run a low boost map and a high boost map if you like.

Give Gerry at Storm a call (UK Distributor), tell him what you want to do and he will explain it all in GREAT detail (pen and paper is very hand ;) )

Oh, you could mention my name as well as this all helps to build it up a bit ;)
 
#11 ·
Have a chat with Dave Walker at Emerald, their M3D provides for turbo and supercharger mapping, its economically priced and the mapping software comes free. Boost boy has one he is just putting on his C20LET. The ECU is fully user mappable and comes with free software and cable. It's used by Turbo Technics of their supercharged and turbocharged conversions, I've used the M3D on over 50 conversions and use it on my own Cosworth YB.

It has 16 load sites and 32 speed sites.

Dave
 
#20 ·
Not totaly informed on either system really but,

Doesn't the unichip still allow you to keep many of the extra features of the standard ECU. ie, out of control boost cut, limp home mode, fault code system etc.
You could loose some of these features changing to a dedicated ECU.

Something to think about maybe.
 
#22 ·
ChrisB said:
Not totaly informed on either system really but,

Doesn't the unichip still allow you to keep many of the extra features of the standard ECU. ie, out of control boost cut, limp home mode, fault code system etc.
You could loose some of these features changing to a dedicated ECU.

Something to think about maybe.
Aha!
You've hit something here - a fully mappable system from scratch is NOT what I'm after.
The stock ECU is pretty good and I don't think I could better it after spending some hours on the dyno.
No chip expert, either. I'd like to extend and amend specific maps, not re-invent the wheel. I'm not creating a 1000bhp LET here...
 
#23 ·
I remember someone mentioning that there are about 4 types of unichip and the loom is just slightly different for each car?
Is this true?

I'd be interested in one if the type for my current car was the same for the LET so that i could remove it and keep it when i change cars.
 
#25 ·
but John - I'd say you're the sort of chap who would like to be able to have full control over the ECU anytime, anywhere - not being restricted in the sense of having to go back to the guy with the dongle in order to get changes made has a lot going for it - only systems like M3D and MBE let you do that in the comfort of you're own garage..

I'm a complete novice as well, but learning fast - just so long as you can learn the basics and get an initial map & setup that works it all comes together quite fast :)
 
#26 ·
Chris - the different types are there for the different MAKES of cars as they hvae different crank signals.

As far as I can make out, Vauxhall use the same signal so it should be ok but give Gerry a call to find out anyways - 0845 345 4045


Gary - no offence meant but I think you can do a hell of a lot more damage to a turbo car when "learning" than a N/A car so its not something I would wanna try without prior knowledge.

If your not interested in complete ECU change John then the Unichip is the best you can get. The extra boost module runs the boost but still allows the ECU to see the it as well. What you do is program the boost module to the cut limit you want and when it reaches this then the standard ECU takes over and cuts the boost as it normally would if it was over the limits.
 
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