compressor surge or something else?

Pages: 1 [2]

« previous next »

Author

Topic: compressor surge or something else? (Read 14021 times)

rnagy86

Sr. Member

Karma: +6/-11
Offline

Offline

Posts: 367

	Re: compressor surge or something else? « Reply #15 on: May 17, 2016, 10:47:18 AM »

Quote from: nyet on May 17, 2016, 10:13:02 AM

Hmm. In one of your logs, your battery voltage seems super low... 13.3 v... maybe alternator/battery/electrical?

Bad things seems to coincide with crossing 13.5 volts

I actually have a brand new alternator, i was only getting 12.7 v -ish charge previously.
I think 13.5V is acceptable with all the electrical stuff on and two walbro 450lph e85 pumps
going. I don't see how voltage could relate to this.


	Logged

nyet

Administrator
Hero Member

Karma: +604/-166
Offline

Offline

Posts: 12233

	Re: compressor surge or something else? « Reply #16 on: May 17, 2016, 10:48:38 AM »

Quote from: rnagy86 on May 17, 2016, 10:47:18 AM

How old is the battery? Can't hurt to try a new one. It isn't as if you have any other clues right now... 13.3 is pretty low


	Logged

ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.

rnagy86

Sr. Member

Karma: +6/-11
Offline

Offline

Posts: 367

	Re: compressor surge or something else? « Reply #17 on: May 17, 2016, 10:50:25 AM »

Quote from: nyet on May 17, 2016, 10:48:38 AM

How old is the battery? Can't hurt to try a new one. It isn't as if you have any other clues right now... 13.3 is pretty low

1.5 years old maybe. but sure i can try a new one, it only costs $150, will try tomorrow Wink


	Logged

nyet

Administrator
Hero Member

Karma: +604/-166
Offline

Offline

Posts: 12233

	Re: compressor surge or something else? « Reply #18 on: May 17, 2016, 10:56:34 AM »

Quote from: rnagy86 on May 17, 2016, 10:50:25 AM

1.5 years old maybe. but sure i can try a new one, it only costs $150, will try tomorrow Wink

Wish I had better advice for you Sad


	Logged

rnagy86

Sr. Member

Karma: +6/-11
Offline

Offline

Posts: 367

	Re: compressor surge or something else? « Reply #19 on: May 17, 2016, 11:02:44 AM »

Quote from: nyet on May 17, 2016, 10:56:34 AM

Wish I had better advice for you Sad

Could you check some other car's logs in case you have them handy?
I wonder about the voltage there.


	Logged

nyet

Administrator
Hero Member

Karma: +604/-166
Offline

Offline

Posts: 12233

	Re: compressor surge or something else? « Reply #20 on: May 17, 2016, 11:07:22 AM »

Quote from: rnagy86 on May 17, 2016, 11:02:44 AM

Could you check some other car's logs in case you have them handy?
I wonder about the voltage there.

im generally seeing 13.7 ish at the lowest

But very few of my logs have ub, so I don't have a good representation.


	Logged

jmont23

Jr. Member

Karma: +4/-0
Offline

Offline

Posts: 45

	Re: compressor surge or something else? « Reply #21 on: May 17, 2016, 01:22:40 PM »

My battery voltage drops between 12v and 13v at full boost. No issues here.


	Logged

rnagy86

Sr. Member

Karma: +6/-11
Offline

Offline

Posts: 367

	Re: compressor surge or something else? « Reply #22 on: May 18, 2016, 09:52:51 AM »

So I went crazy today and did two things.

#1 run the car without intercoolers, quickly bypassed them (no pictures sorry, i forgot to take 'em)

I saw a sudden overshoot of boost on ramp up, so I had to fix wgdc to 50% to see what's up and I noticed
that there is basically no surge at all at 1.6bar of boost, I stopped at 6k rpm because I knew IATs will be super high, well for sure
they were. 100C at 5.5k RPM and ECU pulling timing down to 2 degrees... thank you E85. Wink

Then I figured I have to try something else. I remembered from Flyboy's testing that the OEM RS4 intercoolers
flow better than the ERs, well the only problem is that I only have one handy, the driver side.
... but hey I have a set of C5 RS6 intercoolers which are GIGANTISCH (ref.: https://www.youtube.com/watch?v=5WSkKUjizxU).
Since I did not have enough silicone couplers for doing both sides with the RS6 coolers,
I did the driver side with the RS4 and the passenger side with the RS6 cooler.
I think I could not fit both RS6 anyway, they are really huge.... I mean it.
Don't laugh at me, this is eastern european style.

http://i.imgur.com/qSdP061.jpg

http://i.imgur.com/NtB2lkc.jpg

I also did a reference run with the ER coolers an hour before I installed these here are the results.
First is the ER then the RS6-RS4 combo.

What do you guys think?


« Last Edit: May 18, 2016, 09:56:59 AM by rnagy86 »	Logged

rnagy86

Sr. Member

Karma: +6/-11
Offline

Offline

Posts: 367

	Re: compressor surge or something else? « Reply #23 on: May 18, 2016, 09:55:39 AM »

And here are the files.


	Logged

Pages: 1 [2]

« previous next »

Jump to:

Navigation

Personal Tools

April 28, 2024, 02:08:14 AM

Welcome, Guest. Please login or register.
Did you miss your activation email?

Navigation

Personal Tools

Search