20v help needed

[bens_cab]

Hi guys set up as follows

mk1 golf gti 20v turbo engine
240cc injectors
ko3 turbo
250kpa map sensor
redlines at about 8000rpm
engine standard

msns-extra v3 board 029q

i have had the car running but its very lump
the timing is spot on but fueling is a mile out has anyone got a fuel&spark tables that may run this engine im waiting for my wideband but its still here and probally wont be for about a month

so if theres anyone that can help or give me advice on how to get it driveable id be well happy

its frustrating cos it runs and ticks over ok but gets lumpy when to try to rev gently or hard

Ben

[jsmcortina]

(I moved this post to this forum)

Have you read the tuning section of the Megamanual? You should be able to get a reasonable tune even without a wideband.

James

[bens_cab]

Found these maps there for a 16vt golf gti would they be a good starting point for my 20vt or are to rich to lean?? what do you guys think






i dont have a wideband or lambda sensor so doing this a bit blind ive read the tuning page till my eyes popped out but just cant figure it out

[fscott]

Found these maps there for a 16vt golf gti would they be a good starting point for my 20vt or are to rich to lean?? what do you guys think

Well, without any O2 sensor at all, you're going back to tuning the old way, by reading plugs and listening to the sound of the engine and smelling the exhaust. This can take a long time to get right on a carburated engine, where you only have a few jets to change out. Using this method to tune 144 different points on a table is going to take a long time.

It would take less time to work a bit of overtime, save up for a wideband O2 system, install it and let autotune do its thing. Unless you like doing things the hard way.

Nobody's going to be able to tell you if a map will work for your car just by looking at it. The best answer you'll get is "maybe." If I were you, I'd install a wideband, plug in the maps for that 16v golf and start autotuning to adjust the mixture.