PD 100 tuning help

[Gavin NI]

Hi all,

I'm after some expert advise on tuning my ATD 100 PD engine.

This is the car

I have fitted the following to get 159.6 bhp and 259.6 lb/ft with graphs that are all over the place


PD 130 injectors
PD 150 turbo
PD 140 pressure converter
PD 130 maf housing, maf and all metal intake pipes and airbox lid
MK V Golf R32 DSG intake piping to air box
Custom made EGR deletion
Miltek cat back exhaust
Chipped UK custom mapping running 19-21 psi according to my boost gauge

Mod's on way or in garage...
150 PD ECU
Miltek Downpipe
Entire MKIV Golf 150 PD FMIC and map sensor
Uprated clutch


We can't seem to be able to get the car to run right. There's zero smoke and the boost is all over the place. I'm trying to go down this OEM route first before I go for up-rated turbos, FMIC's, etc etc.

Can any of the experts shed any light on why we can only achieve 160 bhp from these mods so far and what would be causing the boost problems. Is it down to the mapping or a the OEM ATD ECU which will be replaced very soon by the 150 PD item.

Thanks for any help...

Gavin

 

[devonutopia]

surprised to see a pd140 pressure convertor. Is this the "thrust sensor" ? Perhaps you should get a pd130 one instead? It would make sense to keep all the bits as close to the original spec as possible, and the pd140 is for a 2.0 TDI so might be different in some way.

boost levels sound about right. Actually just read below it says you're getting pd150 FMIC and map sensor. Is this what you mean by "pressure convertor" ?? Not heard it called that.

My car's a pd100 TDI, and she's ran 260bhp. But I've not got an ATD engine in it anymore.

 

[Gavin NI]

Pressure converter (boost controller) is what most would call the N75. They don't make them anymore for the ASZ or ARL but the new 2.0 TDI one is exactly the same apart from the part number beginning with 1KO.

I picked up an ARL ECU today so that will be coded in next Sunday and my current map altered for it.

I also have an ASZ bottom end that I'll put in with the new clutch in a few months time...

Just really trying to sort out the boost issues ATM and hoping the ARL ECU will help with this or so i've been told. It didn't cost very much anyway so if it doesn't work i can make my money back on it.

 

[devonutopia]

Hmm, if you're using a 2.0l TDI n75 box, that could be the issue. I would look to find a pd130/pd150 n75 box from a scrapped car - must be a few about.

Not sure the ECU will help as the ECU merely tells the car what to do, and 2 different ecus will just tell the car to produce same boost / same fuelling etc. I would stick with the pd100 one to be honest.

 

[john2017]

Hi,
I don't think you will get a lot more power (10bhp+) without larger turbo. The current turbo is at max boost and if you push any moreit will overspeed.
What you are getting is a more robust engine and without the fmic you were gambling a bit on failure.
Re mods on way:

150 PD ECU - why as the pd100 ecu can be adapted
Miltek Downpipe - cool
Entire MKIV Golf 150 PD FMIC and maf sensor - excellent, sure it will fit?
Uprated clutch -excellent -

How about a vnt17a turbo? Cost around 200 quid 2nd hand poss new.

 

[Gavin NI]

I already have a GT-1749vb (PD 150) turbo fitted and the fmic will fit no probs there the same car after all.

I've been told by a few tuners that some ecu's are more prone to messing the boost up and there are a few ARL one's that make life alot easier when it comes to the custom mapping. For £50 I couldn't let it go by me and if this doesn't cure the problem then I can sell it on at no loss.

@Devonutopia I only changed the N75 after the RR day. It's made the car alot more pleasant to drive and it feels more torquey lower down if that's possible. The PD140 N75 is exactly the same as an ASZ/ARL item it's just that they don't manufacture them anymore.

 

[john2017]

160bhp

Hi,


Okay I didn't understand you had 1749 turbo. If you have the turbo, injectors and fmic and take it to allards you will get 200bhp from a remap of your current ecu. I think the va turbo runs well up to 1.6 bar and the vb up to 1.8 bar which is approx. 26 psi.
Yes, n75 and mass air flow sesnsor can become an issue.
Take it to the experts!

Cheers

I already have a GT-1749vb (PD 150) turbo fitted and the fmic will fit no probs there the same car after all.

I've been told by a few tuners that some ecu's are more prone to messing the boost up and there are a few ARL one's that make life alot easier when it comes to the custom mapping. For £50 I couldn't let it go by me and if this doesn't cure the problem then I can sell it on at no loss.

@Devonutopia I only changed the N75 after the RR day. It's made the car alot more pleasant to drive and it feels more torquey lower down if that's possible. The PD140 N75 is exactly the same as an ASZ/ARL item it's just that they don't manufacture them anymore.

 

[devonutopia]

Allard took a pd100 fabia and just stuck 2nd hand vnt17, pd130 injectors, and an FMIC of their own design, and mapped it to 185bhp. On standard pd100 running gear elsewhere - brakes, N75, ECU, gearbox, etc.

When I got my VT5 hybrid, Jabba had the same issues of not being able to control the boost and it was spiking to 2.5bar+ - Now it's rock steady at 1.8 bar on full throttle.

 

[4ndyLeon]

who are these Allard ?

 

[john2017]

www.allardmotorcompany.co.uk
they successfully raced a golf tdi in the vw cup