Just re run the learning mode on my evc IV as I was having problems with the calibration. Seems a lot better now..

Question: My high boost is set to 1.15bar under acceleration it peaks to 1.23 drops to around the 1.15 mark, it then pops back up to 1.23ish then down to 1.15 and so on.. Constantly fluctuates. Does this sound right? Don't want to cook my engine.

If any evc experienced people could reply would be very much appreciated.

Thanks

Scoobs
(MY00 UK)

[This message has been edited by scoobs (edited 01 May 2001).]

 

Sounds like you're hitting overboost (happens at about 17-18psi, 1.2bar) whereby it will lower the pressure for a bit. Don't know enough about the EVC kit to help more, sorry...

Richard

 

With the EVC IV you don't get the normal overboost spike you see with a standard scoob.

It will fluctuate slightly (as it is closed loop it is constantly correcting and adjusting to maintain your pre-set level of boost). Remember too that the fluctuations you see on the EVC are only there for a split second and that if you have an accurate auxiliary boost gauge it will be showing a fairly constant reading without the alarming peaks.

Have you tried adjusting the offset as a last resort? This allows you to adjust the boost curve.

Rich.

 

Rich:

Thanks for the reply. My offset is currently 1.00, if I adjust it up it does reduce the peak boost bellow 1.2 (in 4th/5th gear) however I only hit about 1.03bar in 3rd. Would like to be hiting 1.15 in 3rd. If the 1.2 spikes are safe then I am happy with that. What's the highest constant boost you would recommend as being safe on a uk spec turbo with samco intercooler hoses?

Thanks again

scoobs

 

I can't really advise you on what level of boost you should be running safely on a standard car. If it was mine I would not go higher than 1.15 in 4th/5th. That said I know of people running higher boost with the EVC & their stock ECU

I am running 1.2 bar on a UK MY00 with Unichip and water injection and I will be fitting a hybrid turbo in the next few weeks.

Did you play around with the offset whilst in learning mode? What gear did you use for the learning run? The other point worth mentioning is that the EVC learns over a period after set up to improve its accuracy.

I think you will find that you will always get slightly higher boost in 4th/5th due to load.

One of the advantages (or disadvantages, depending on how safety minded you are) is that the EVC holds the boost all the way to the red line, where as with a standard car the boost will tail off before.

Rich.

 

Rich

I too have a unichip, but allass no water injection. I did the learning run in third gear, as per the instructions. As for the offset only touched it after the learning run was completed. I will keep an eye on the boost and see if it does settle down.

Does the water injection make a big difference?

Thanks

Scoobs

 

Ive had the EVC for quite some time and it was a pig to set up. I would recommend you get yourself down to a rolling road to make sure the fuelling is holding up correctly at different boost settings. It will show boost fluctuating as loads vary constantly second to second. You shouldnt have to touch the offset according to HKS guy who helped me out with the set up. I have been running 1.3 bar on STI5 - all ok so far!
Phil