Taking the mystery out of tuning the 1.4

[Brad Ferrell]

I'm working with this power/speed shop in Houston and their website has some great articles about engine management and tuning. They use HPTuners and the "articles" link can be found at the top of this page, Dyno tuning done on accurate correctly calibrated Eddy Current dynos

 

['12Eco]

Stew or anyone still watching/experimenting,

Has anyone messed with the WOT camshaft phasing yet? HPtuners forums has the VVT guide which suggests retarding the cams to improve higher rpm power.

Looking at the High baro table in the cruise ranges and low load there are EGR areas of large camshaft separation. However I was unable to figure out are higher numbers more advanced? eg for EGR do they advance the intake and retard the exhaust or advance the exhaust and retard the intake?

I attempted some lower numbers but didn't really get consistent results. Would love a share session here if anyone has some results.

 

[Stew]

I have not touched that area. I think MPFab did spend a little time in that area although I don't recall which of his threads I was reading that.

 

['12Eco]

Thanks, Found the thread.

I also found a thread on HPtuners that indicates the intake cam is advanced and the exhaust cam is retarded during low load cruising to lower dynamic compression for better gas mileage. This leads me to believe that higher numbers are advance and lower numbers are retard.

From HPtuners forum (taken from somewhere else):
Guide for VVT Tuning:

Advance intake and exhaust => more low-RPM power, less high-RPM power
Retard intake and exhaust => more high-RPM power, less low-RPM power
Less overlap => lower EGTs, faster turbo spool, less fuel
More overlap => higher EGTs, slower turbo spool, more fuel

MPFabs thread summary: (hope he doesn't mind me sharing his results here)
Was attempting to adjust the cam to combat compressor surge with a larger turbo so these may not be applicable.

Found loss of power retarding exhaust cam
Seemed to run better with the intake cam retarded a "good bit" over stock above 4000 rpm
Advanced the exhaust cam above 6000k

Currently running with stock exhaust cam and intake cam retarded... will update if I get something groundbreaking but right now doesn't seem like a huge difference.

 

[cndctrdj]

Free bump. Any new stuff? Any new findings? I just got a 15 rs. Can't wait to mess around with it

 

[Stew]

The tune posted here has run its course, I don't anticipate making any updates to it. It does work pretty well, and fueling/timing is safe as confirmed from my dyno run with this tune but there are probably a little bit better ways to tune.

It's one of those things, there are several ways to reach your goals and this is simply one of many.

 

[cndctrdj]

Thanks. I was just wondering if anyone has done anything differently on the cars. I have been bouncing around on hptunwrs and reading a lot. Waiting for the engine to break In a bit then ill be playing around some more

 

[BNRacing]

If any of you guys don't want to learn HPTuners, BNR can do HPTuners, EFILive, and Diablo custom tunes. For those that own the software already, it's a cheap way to get a good tune!

 

[cndctrdj]

I didn't know you guys sent tunes for hptuners

 

[mitdr774]

I have been running a BNR HPT file on my 1.8 for a while.

 

[kevjam79]

I have been running a BNR HPT file on my 1.8 for a while.

What improvements have you seen over stock? MPGs?

Thanks.


Sent from my iPhone using Tapatalk

 

[mitdr774]

well its a 1.8 so it doesnt exactly pertain to what improvements the 1.4 will see. Just stating that they do HPT as well.

Compared to the previous company whos tune I was running, and what I came up with on my own, BNR has left me with a much better program in my ECM.

 

[kevjam79]

I have the 1.8 as well... just curious..

 

[BNRacing]

We can do HPTuners, EFILive, and DiabloSport on our own, and then we also sell Trifecta, but can't edit their files

 

[Flyer]

I'm not sure how linking to other forums is looked around here, but I hope it's not terrible.

I posted some info here about a frustrating problem I've had and would really appreciate if some of the greater minds on here would help me out.

I need help with p0238

Thanks in advance.

 

[Flyer]

BTW, This thread is still very awesome and good for reference.

 

[cndctrdj]

i heard the 15 ecu is different than the others. more restrictive. has anyone ran into this

 

[$ub$onic]

i heard the 15 ecu is different than the others. more restrictive. has anyone ran into this

Nope, my 15 turbo is a e78 ecu.
Programming could be different but the ecu is the same.

 

[nickalltogether]

Does anyone know if fully writing the stock tune back to the ecm (the one pulled before any tuning was started) will also set the flash counter back to an unaltered state? I have read on some cars that it does.

 

[cndctrdj]

Has anyone messed around with hptuners 3.0? I downloaded it but have not played with it on the car yet.