CraigJ
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| posted on 3/1/10 at 09:11 PM |
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VAG 1.8T on megasquirt ??
Has anyone run a VAG 1.8T engine on mega squirt?
What would be needed to run the engine in a kit car? can any of the original VW sensors be used or will every need to be changed?
Any help will be great.
Craig.
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austin man
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| posted on 3/1/10 at 09:15 PM |
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Why not run the VAG ECU? in an Audi TT the 1.8 is 220bhp in the golf its 150 but mappable to 210 in the Skoda Octavia its 180BHP.
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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martyn_16v
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| posted on 3/1/10 at 09:24 PM |
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Unless you do some funky fiddling with the VAG ECU you need to also run the instrument panel and half of the components from the donor car to get it
to run without chucking a wobbly and some error codes. DIfferences in power between the various 1.8T's are to do with much more than the
ECU's, there are several different turbochargers on the different variants.
Megasquirt on 1.8T has been done several times now. Have a trawl around on the clubgti, edition38 and vwvortex forums, you'll turn something up
fairly quickly 
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martyn_16v
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| posted on 3/1/10 at 09:27 PM |
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Oh, you'll also need to fit it to a gearbox. There aren't any suitable RWD cars in the VAG range so no bolt on gearbox options,
you'll have to make something else fit. Adapter plates for type 9/MT-75 are available but aren't cheap.
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tomgregory2000
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| posted on 3/1/10 at 09:29 PM |
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only 2 different turbos used
one is the K03
and the other is the K04
The early blocks had better heads
the later blocks were much stronger
the higher horsepower cars had 2 intercoolers
the difference in horsepower IS down to the ecu!!
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CraigJ
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| posted on 3/1/10 at 09:36 PM |
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Engine will be mid-mounted so gearbox is no issue, the engine is the AEB big port head from the Passat. I will have a look on the forums suggested see
what i can find, cheers guys.
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Russell
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| posted on 3/1/10 at 09:52 PM |
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I'm going this route and I had the immobiliser taken off the ECU so it doesn't need the VW key or instruments any more. Cost about £50
quid for that. I've done loads of trawling round the various forums for info on Megasquirt, VEMS, QPENG etc. ECUs and on balance I've
decided to stick with the OEM ECU (with a +45hp remap  ) because I think it's easier that way.
I'm a bilingual illiterate. I can't read in two languages.
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CraigJ
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| posted on 3/1/10 at 09:55 PM |
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have thought about the OEM ECU but wont it always be throwing up fault codes due to a lot of things no longer being attached?
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Russell
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| posted on 3/1/10 at 10:10 PM |
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You can remove a lot of sensors and fool the ECU with resistors (info on other forums for doing this). I had the engine running fine in the donor car
with all non-engine bay wiring disconnected except the fuel pump. VAG-COM showed some fault codes but I'll be able to eliminate or ignore those
- most of them aren't engine related anyway.
Many others have transplanted this engine into all sorts of VW vehicles like MK1 GTIs etc. and they report the engine runs best on the OEM ECU.
I've been warned off the QPENG ECU (and I think early versions of Megasquirt - correct me if I'm mistaken) because of the lack of facility
for knock sensors. VEMS looks good and worth a go if you can find some base maps to get you running.
I'm a bilingual illiterate. I can't read in two languages.
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beaver34
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| posted on 3/1/10 at 10:26 PM |
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quote:
Originally posted by Russell
I'm going this route and I had the immobiliser taken off the ECU so it doesn't need the VW key or instruments any more. Cost about £50
quid for that. I've done loads of trawling round the various forums for info on Megasquirt, VEMS, QPENG etc. ECUs and on balance I've
decided to stick with the OEM ECU (with a +45hp remap ) because I think it's easier that way.
i agree totally, manufactures spend thousands on mapping there cars, not £400,
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mgmiller
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| posted on 3/1/10 at 10:44 PM |
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I'm running with the original Siemens ECU in mine. Pain in the arse to get to run properly but once I got all the information it was relatively
easy.
Be careful who you get to do the immobiliser defeat, as not all defeats are the same, when they do the defeat they can remove a lot of the fault codes
from showing.
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austin man
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| posted on 3/1/10 at 10:56 PM |
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3 turbos fitted the K03, K03's and the K04 I believe
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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martyn_16v
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| posted on 5/1/10 at 10:10 PM |
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quote:
Originally posted by beaver34
i agree totally, manufactures spend thousands on mapping there cars, not £400,
While that is true, manufacturers also have quite different goals when they are creating a map than we might. An OEM's primary goals will be
NVH, pootling-around-town driveability and fuel economy/emissions. Then they'll knock it all back on the safe side a wee bit to account for
variations in a massive production run of engines. Getting the absolute maximum amount of torque at all points in the engines operating range will be
fairly low on their list.
Don't get me wrong, you'll struggle to get an engine to behave as well on a cold winters morning as the OEM did, but that doesn't
mean there isn't room for improvement in the areas we might be interested in.
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