Did you get PRO map or did you use the RACE program and make your own?

 

I had custom tune done in Plano. I do not know enough about tuning to do it myself.

 

i logged the cobb stage 1 for 91 octane using 93 octane today and i am knocking the same way as with the other tunes. normal driving. i knocked backing out of the driveway and then again starting out down the road. i have a 34 miles commute and didn't have issues with it on wide open throttle on the highway.

it seems that i have a knock with the cobb stage 1 for 91 and 93 octane and the perrin stage 1 for 93 octane with normal driving only (i am excluding little events like .35 here and there on pulls).

this weekend i am going to log the stock tune with normal driving and pulls. i won't be surprised if i find the same things with stock. and if there is no knock when stock then i will be totally turned off to off-the-shelf tunes.

 

^

Please keep us informed.

If this knocking issue isn't resolved, I'm going to return the AccessPort I just bought once it comes in the mail and get a custom tune instead.

Lifes too short to put up with crap.

 

well if nothing gets worked out then i will consider a custom tune with my AP.

Also i remember someone on here who was dyno tuning who noticed a significant difference in afr richness with a full tank of gas versus a half or less tank. i always have the worst knocks right after fills ups and it sounds like scottatyamaha does to. i wonder if this has something to do with it.

 

so perrin got back to me. the tuner looked at it and said that knock retard values of 2 or lower is considered normal. it is when you're getting 4-5s that it becomes a problem. he offered to modify the map for me. i will see what the outcome of that is.

i flashed back to perrin's map today and logged normal driving. i logged some knock retards in the 2s not significantly higher. and it was only when starting out from a stop under normal driving.

i haven't been getting many bigger numbers with all the maps if you look at it as 2 being considered normal.

 

I'm going to be a little blunt here, but I can't believe that you have made such a big deal about this and have been pretty much trashing their maps and you have yet to see what kind of knock values you get on your stock map. At least do that! In addition to that you don't know what they even mean. You said you are getting knock when you back out of your driveway....do you think these guys were out tuning these maps in those cells? Go log the stock map and see what you get.

The log that was posted shows low knock counts at peak load. It is pretty damn cold out right now and the car WILL see more boost and higher load than when it is warmer. On top of that someone that was seeing knock values said they were using Shell 93 and it is pretty well known that while this gas is "clean", it has no alcohol in it like the "junk" gas and cars with even slightly aggressive timing see preignition on the stuff. From back to back tests I can tell you that winter BP and Shell suck!

If it is turning people away, I will say this...I logged my 10 minute drive to work this morning. Perrin Stage 2, 18 deg F outside temp, Speedway 92...I didn't get a single knock value the entire drive and I did put my foot in it. On a 1-4 pull I might see 1 or 2 cells show a .35 value or something like that. That is completely normal and nothing to worry about. You are putting too much faith in that cheap *** knock sensor. If the motor isn't happy...you will know it

Best of luck. Log the stock map and lets see how she does. Also...maybe try some different fuel.

 

I have to go with DRAG on that one. I looked the world over to find a tuning/parts company that I liked and respected. After seeing Jeff Perrin at the Oregon Trail Rally last year (not long after I bought my EvoX) and the fact that the owner is out there showing off his business impressed me. I decided to go with them for other reasons as well. The amount of time and research that he puts into his products. (Other tuners were throwing out parts that were not well made, i.e. intakes that caused problems like stalling at idle, just to start making money in the EvoX maket) Perrin takes their time to make sure you get a quality product at a fair price. Plus as an Oregon company, I like to support my fellow Oregonians and their shop is like 5 miles from my house. Plus Jeff put the parts on my car himself, and when I had problems with the Manual Boost Controller, He was out there himself in my car with his laptop going over tunes, driving the car doing all he could to make it right. How many guys who have their name on the side of the building are actually working on your cars? I know for a fact that he is, and the way tuning can be sometimes that gives me confidence. If Perrin tells you not to worry about a knock at 2 then don't worry about it and enjoy the ride.
Perrin is awesome and I always eagerly await their new products.
P.S. if you go to their website and see the dual gauge pack for the EvoX. That is my Evo. Im not bragging I just think its cool. (I know, I know, pretty nerdy)

 

well drag, i've been waiting for someone else to chime in here to say what they've learned from some experience. i don't claim to know about all this and never posted like i did. that aside i've also posted several times that i wouldn't be surprised if the stock tune didn't produce the same knock retard values. that was my next step and my own way of problem solving through this since no one else has provided input (logging stock).

i made sure to not trash these guy's maps. it is a discussion board and like i said this is how i problem solve and have learned up until this point. just so happens it ends up being pages of posts of people who aren't clear on what they're talking about either. my conclusion was coming after i logged stock.

btw i wasn't ranting and raving about values of .35. i was looking at 2s and higher. yesterday i logged a 3.87 pulling out of the gas station on another off the shelf map.

i like to know as much as possible about the things i put on/in my car.

again we're all just trying to learn. i've come a long way since posts about first oil changes and alignments, don't you think?

 

I understand and I didn't mean to come across as agressive I just think you should learn more about it before discrediting these guys so openly. I'm just giving feedback that I have tried the same maps and I have no knock, or very small values. This morning I had a single knock count while warming the car and not a single one the whole drive her...that is false and nothing to worry about.

The 2 and 3 counts you are seeing are significant, and I think it is your gas. I logged stock and I saw the same sparatic knock values. Do a few datalogs and see if you see a pattern in where the knock values are occuring. Since you have the Cobb maps, you can go into APR and modify them...or send them to me and I will fix those areas and send them back and see if you get the same knock still.

 

Hey Guys,

Knock is a fact of life for a motor, it's going to happen. The question is, when is it harmful? The quick answer is, when the cylinder pressures are highest, e.i. a full throttle pull. When there is repeatable knock during high cylinder pressure the tune most likely could be adjusted.

Knock events while idling or cruising present little to no issue for the motor. Something to not really worry about.

Thanks,

 

It is all good. I still don't believe I was discrediting anyone. I and another member were trying to find out if others were having the same occurances. There was never any mention of "Cobb is crap" or "Perrin sucks," ect. I wanted to know is this normal and should i continue with this map. my past posts have asked that several times without answers.

i will be interested to see how the logs look once the weather is warm. will there be less 1s and 2s or more?

 

thanks, Rob. That is what i've been looking for. Not that i didn't believe Chris at Perrin either.

 

Just got all the info I was needing.

 

So what is your take on this log??
[/QUOTE