@Calvin@COBB : Any update on this?

Someone explain this screeching squirrel to me (please) when you have the chance. (I understand it is the compressor blade making contact, but how loud and when does it occur?)

i.e. my car loses vacuum because I don't drive it often, and when it does finally achieve vacuum, I get a quick squeal.

Nothing @ wot though, or part throttle boost.

Wait until you see BW newest addition to the EFR family... It will be THE turbo for these platforms. ;)

Do tell.


Like, now.

I'd love to, but I've gotta let Geoff break the news once it's been publically released... I can only http://img.photobucket.com/albums/v3...es/secret2.gif

Haha! Sorry man. Just wait and you'll see. :)

I'm guessing here as I've never dealt with it personally: it's probably the bearings on the turbo going bad. If it squeaks when you get vacuum it might be that the engine starves the turbo of oil for a second as the vacuum pulls all the oil out the the turbo housing.


Tapadatass

In my case, it was a very loud (prob >90dB) shriek coming from the center console area just after the onset of boost (3-5 PSI). I had this happen 4 times repeatably on the same drive home and lifted within 1 second each time.

I interpreted this as the compressor spinning at ~50,000 RPM making contact with the compressor housing.

I have no similar loss of vacuum.

belt squeal maybe? :Eyecrazy:

Btw, E85 fixed my sticking/dirty EGR. This didn't need a new thread.
Just thought I'd toss that in there... 3 gallons/tank over four tanks > taking off your EGR to clean it.

Continue on with your squirrels.

Way higher pitched and louder. Definitely a different noise.

Autocrossed the car today for the first time this year. Car is absolutely monstrous, and not really suited for autocross anymore, hahahaha. It was a TON of fun, though, to be in third gear and not worry about downshifting in some of the sections. The car is going to be ridonculous on an open road course.

My car is running good on 25% E85... not sure if I should continue to add timing on 25% or move up to 50% and add more timing. My virtual dyno plots haven't show that much in the way of gains, but I doubt I am past MBT as I only hit 12.5 to 13 degrees at redline and am only 2-2.5 degrees above OTS 2+ values. Any advice? I haven't really seen the kind of gains that others have, maybe I'm just an uber noob at tuning? VD attached

Your timing is ssssuuuuuuppppppeeeeerrrrrrrr LOW lol.

My advice would be to start adding some immediately. At MINIMUM, you should be at 16* peak with 25% e85... and that is pretty conservative

Considering that I was running about 20*@6500 with only 2 gallons of e85 to a tank, I'd say that there's plenty of power still in that 25% mix for you.

Care to post your High OL no knock timing table from when you were on 2 gallons?

I set it the same as my max tables from 1.25 load @2500+. I posted timing from 2500-6500 in cld12pk2go's BT build thread. I can't get to my computer right now. It was 19psi and 11.94 AFR from 3k+. The power gain was very noticeable.

http://www.mazdaspeedforums.org/foru...ml#post1105773
Here's a link, post 136.

Yah, I saw your post from his build thread. I want to see all the other areas of your timing...at lower loads. I'm trying to collect different timing for lower loads to see what has worked for others, to try to make normal cruising more responsive.

Thanks :)

Seafoam and a full tank of 93 cleared up my initial drop at WOT. Back on that 50/50 until snow/freezing temps.

And on that issue, has 100% e85 been tested in very cold temperatures? Even flex fuel vehicles have starting issues from what i've read.

Cold starting issues are exactly why E85 drips down to E70 during the winter...

I already have cold starting issues with ambient temps down in the 50's now.

I'm going to switch from ITV-22's back to the hotter ITV-20's and see if that helps.

My one-tank run was more of an experiment to see what I could get out of the car with the 2 gallons. All that I messed with was WOT settings, and I haven't gotten any e85 since then, so I haven't been able to fine tune any part throttle settings.

It takes my car a little longer to start in the morning, it's noticable but not a major issue and it's been down into the 30's here in the morning.

I added 1.5* and am at 14* at redline. Increased butt dyno and VD shows a marked improvement. I need to smooth out my timing curve because it holds at 6.5* in the middle of the power band. What's a safe way to do this? I don't want to retard timing a bunch in one area and then increase it a bunch in another. Or is this how it should be?

Smooth curves :) Refer back to my timing numbers I found on the dyno. You shouldn't approach within 3° or so of those without being on a dyno, but it should give you a good idea of how much you can run ;) [And it's a good bit more than you're currently running.]

Check your max timing table and bump it up if it's limiting you....I believe the table you want to lok at is "Ign Table - Max A" iirc

If you have plenty of room just keep making 1* changes till your timing curve starts looking like an actual curve.

Remember, the Max timing table is for pump gas also. I and many others have run higher lower load max tables with good success on E85 blends.

I am using Phate's excel spreadsheet to make the changes, so all tables are accounted for.

current VD proven gains on E35

first 3 runs on my above timing and E35, last two runs on the below timing.

I was concentrating on removing the dip in power around 4500 in the 1st 3 runs which I did. You can see the dip on both HP and TQ was smoothed. Next I'll bump up the lower portion and see how things react...trying to get a smooth power curve overall.

http://mail.netsecurenow.com/img/dyno/v115k-v115k1.jpg

another plot from this morning on the above timing...looks like more needed at 5K now......boost a lil wonky on this one but power curve is getting smoother :)

need to scale my maf around spoolup to remove the rich spike when meth starts to spray.

http://mail.netsecurenow.com/img/dyno/v115k1.jpg

Thanks Dano, I sometimes forget that I run that much timing and I consider my redline to be 6k, hahaha. Probably shouldn't come within 5° of those top end timing figures without getting on a dyno.

6k redline is healthy for the platform; especially for stock turbo and when considering injector flow.

Hah. Yeah I bet I am close to max and once I find it with VD I'll pull a degree across the board.

No 24* for me. Lol.


Tappin

50/50 mix....the final map with those timing values definately was the hardest pulling timing values.

I wasn't on a dyno with those...I was on the dyno with 2 degrees less from 4k to RL.

I made 288/340 on the 2 degrees less in quite possibly the worst ever dyno weather possible.

Thanks for the data, Dano. I too am trying to smooth out the power curve. I'll use the general shape of your numbers as a guide to use, but don't see myself getting anywhere close to the same values.

Still boost tuned dano, correct?

The timing down low is what will bring the curve up of course finding the proper advance from 4k on is how you make it smooth as a babys ass.

yessir! I am actually back to liking it lol

ABM temps have dropped 20* and boost is holding target with the same values. I was fully expecting it to over boost. running in 3 port did require BEC to be modified. you would think with lower values but to get the PID loop to "wake up" I increased the underrun values yet had to decrease the overrun. can't explain it but it works :)

v 200 OTS:

my current:

@bewsted, @Dano, @phate ...congrats on the power your making now go to the fucking track!

why...so I could fail miserably :)

I will be installing in the next few weeks. I intend to go right back to corn juice and have this turd Ready for the track this coming season

I am not one to give up easily but I am throwing the towel on my E85 attempts till I decide what route to go for Turbo hardware. My ATP3071 just does not seem to like it. All my dreams of high timing advance are just a unicorn at this point. I've gone through 4 tanks of 4/8 E85 twisting AFR and trying to increase timing but I am just not getting anywhere. Over 30 pulls and map revisions. All I can do is flow 10 miserable g's more than on straight 93 and add 1 degree of timing. Anything more and knock comes knocking like a crack whore wanting child support money.

Last log from today.
I am saying bye to E85 for now. If I could groan myself I would.