1.9TDi Bolt on upgrades - Chip Tuning?

[Fat Audi 80]

Reposted on behalf of David from Dublin:

Earlier this afternoon a friend of mine and myself bought a '93 B4 Avant TDI as a daily driver for himself, apart from all the small tidy up and service items he needs to do and any upgrades he might consider, I can advise him on these, but as I do not have experience of one of these TDI's, is there a shrewd mod like a chip for an S2 to carry out to this type of TDI to give a small bit of extra power without any black smoke?

Are these cars chippable?

Apologies if this is covered elesewhere on this forum?

Thanks.

David

[Fat Audi 80]

From Jason's lighting thread:

Three options I've read about.

1/ Dawes device, basically a bleed valve to up the 1.05bar max the turbo should put out standard. Pitfall = blown turbo etc.
2/ Tuning box, dumps more fuel in than standard. Pitfall = lots of black smoke and increased fuel consumption.
3/ ECU remap. Pitfall, not sure if available to the earlier ECU used before 1994.

Jase..

[Acidburn]

bolt on upgrades:

there is a chip box (think it might be the same as mentioned above) that bolts in the wiring and takes about 2 mins to do and gives another 30bhp, better mpg etc. I know someone running one atm just waiting for it to be on for a while to hear the feedback.

you could blank off the egv valve as that will help a bit.

boost gauge is a very easy fit to find out if its actually running right.

[anton]

had a mate with a tuning box and results were imressive, although i think it also uped the boost, as stated tho LOTS of smoke and horrible fuel efficiency, on these cars you cant increase fuel pressure and the ammount of fuel is purely limited by the size of the nosel. these boxes just make the car inject for longer so effectively retarding the injection at the same time so the extra fuel injected is not very efficient.

MRC do a chip and remp for these cars, look under golf mk3, same engine, ben s2avant had an MRC remap on his b4 tdiand got 135bhp out of it with some bigger injectors aswell, unprated injectors can be found standard on the 110bhp tdi (just make sure its not PD) and also the biggest ones are on the 150bhp 5 pot tdi take a lookon the FAQ on clubtdi.

Ant

[S2central.net]

There are definitely good chips available for SOME variants of that engine - many ECU variants. I'd call MRC first - they will have a tried and trusted solution. I don't like any of the piggyback boxes and eBay chips are a complete lottery.

[s2driveruk]

hmmm odd, been thinking about this for my a6 bus but its the 115bhp pd tdi

[Acidburn]

you can get something for your a6 david no sweat, just check ebay, think they are around 20-30

easy to plug/unplug so usefull for if you want some fun.

[shark_90]

hmmm odd, been thinking about this for my a6 bus but its the 115bhp pd tdi

If it's a PD then you want a proper remap. The "tuning boxes" on fleabay that go for £40ish are just resistors that fool the fuel temperature sender into thinking that the fuel is hot and therefore less dense which makes the ECU inject more fuel. Does work but it's very crude and produces a lot of smoke.

If you want a proper remap then let me know, special offer for forum members and all that

[Acidburn]

Do you do the 1.9 tdi?

[shark_90]

What year? I can do PD onwards, not sure my gear supports the older stuff.

[Acidburn]

L reg, same engine as what jas has put pictures up in his sooty thread.

[shark_90]

A bit too early for my gear I'm afraid.. I'm surprised if S2central can't do something with it but as he mentioned MRC have done them in the past.

Bleed valve with some bigger injectors could be interesting I've heard of 150-160bhp with the right tweaks, look over on audifans or tdiclub

[Acidburn]

yeah i've been looking on them sites, not sure about the bleed valve yet, i've heard of 250bhp out of one tho.

[robo]

i've heard of 250bhp out of one tho.

I want one

[shark_90]

yeah i've been looking on them sites, not sure about the bleed valve yet, i've heard of 250bhp out of one tho.

250bhp?! Not seen that one.. imagine the lump or torque, they only rev to 4k!