Anthony - you are one saint of a guy! (I am joking)

In any event, a few items to point out to you

#1 - it is normal for Evos to have some occassional low knock counts as tank to tank octane variance may easily explain some degregation in fuel quality. Particularly on 91 octane CA cars there is a very narrow window between knocking and having a weak car with no power. There is not a huge margin of saftey like on 93 octane tuning so the car is likely to pick up slight knock counts particularly if you pick up weaker fuel. Also, note that stock cars have continual knock counts.

# 2 - small knock counts of 1 - 2 are of no significance. It is normal for the stock ecu to be regulating knock and adjusting the timing. Although in most cases I like to set up my tunes underneath the knock threshold - on 91 octane CA cars these becomes very difficult if not impossible. Small incidents of knock are not a problem.

#3 - Evo Scan is not a reliable data logger and should only be used in conjunction with other known instrujments and an experienced user as a reference.

#3 - STOCK cars get large knock counts on 91 octane fuiel.

#4 - As for your a/f - the a/f on a EVO varys depending on gear, load, coolant temps and also depending on your 02 sesnor and sensor location. The a/f you are reporting is not out of the ordinary but means little depending on the supporting data.

 

I would have to disagree. I believe evoscan is one of the best tools available to datalog knock counts if the computer is fast enough. In this case the sampling rate of his computer is too slow.

Evoscan will not lie, it will provide accurate knock counts. On the same token 1-3 knock counts on 91oct should not be a concern.

The log however needs more samples in order to ascertain how long and what the peak knock sums number reaches.

 

I am glad to hear your comments on these points - although I do not feel that my vendor section is your place to comment

I disagree and have noted significant problems with Evo Scan recording many data items

It is a great $15 tool but not a replacement for other devices

Please going forward refrain from posting in my vendor section as this is a place for my customers to ask tech questions and for myself to provide tech support

 

Al,

I am wondering if at some point it would be reasonable to do some flow/pressure testing at the fuel rail location. I am specifically referring to installing a fuel gauge and do some before and after testing on the fuel line flow/pressure.

I am up for it. What do you guys think?

Carlos

 

The moment your vendor section ceases to roll through the "Latest Discussions" ticker on the mainpage is the minute we would lo longer be inclined to comment. It is your section, you are welcome to DELETE our input if it conflicts with your degradation of Evoscan. It's a great tool for end users to interpret and review the data from the custom tunes reflash clients pay for, whether your or someone elses. You should be happy about this.

 

I am asking you again in a polite manner to kindly refrain from posting on my vendor section as your input and comments are not appreciated

I do not want this matter to escalate into yet another vendor pissing contest

 

Carlos - this R & D is nearly 3 1/2 years old

One of thefirst things that I do when I start working on a turbo vehicle is to install a fuel pressure gauge so I can monitor the fuel pressure

Back when the evos first came out I was perhaps the first one to try out a walbro fuel pump after discovering that the stock pump was loosing pressure up on top with a few basic performance upgrades such as a intake, exhaust and MBC

At this point it is a 100% certainty that ANYONE who is considering upgrading ANY EVO should include a $90 walbro 255 LPH fuel pump as part of their upgrade path as the stock pump is too unstable and unreliable

I would have thought that by this point the value of upgrading the fuel pump on modified evos would be something that was universally accepted - however - it seems that some people are quite resistant to this concept

 

regarding the fuel pump debate

what was the differences in AF readings before and after
I ask because when i got my evo9 tuned
i was told my pump was maxed out with the typical intake and tbe setup
on the stock pump
if i was to add the 255 liter
how bad of a tune will it now be
what data was gotten by your datalogs on af reading
did it go pig rich?
what did you find out

 

I posted the a/f logs in this post on page 1

 

so verall AF's didnt change by much maybe a bit richer by .5except up top where it went to 9.xx
i guess a reflash is necessary
which is what i was trying to verify

 

This is an important point to realize

IF the stock pump is working properly you will NOT see much of a difference with a walbro

It is only where the stock pump is failing and overheating that a huge variation is observed

 

One of my first mods was the Walbro 255 pump. Its Cheap and easy. My car only had 1100 miles on it. Here is a Link to my Evoscan .Hex from last nite, it showed no KR. peaked at 22 psi, 93 octane

https://www.evolutionm.net/forums/sh...d.php?t=221974

 

thanks Al
when I was dynoed
I was told my stock pump was maxed out
and was also told my car didnt like any timing done
so in all
I did make some good power but felt like something wasnt right still in my car
time for a new pump for peace of mind

btw PM me pricing on a flash
it was already a ecutek ecu from my first flash
and how far are you from Etown since i live about 30 mins away from there

 

I am about 1.5 hours from etown

A retune on the dyno is $350 with the dyno time included

 

AL what I did say that was so bad?? that you had to PM me!! I was just checkiing my AF and knock sum because you told me when it's colder outside that I should turn down the boost!! Remeber?? So I just wanted to see how lean I woukd be VS hot and cold night and day!!! And I don't have a issue bro....
And if I wanted to be a a$$ I can just post your PM you sent me!!!
And I don't have a problem If I did I would have sent you a PM !! Just sharing my loging info!! And my AF readings where done before the cat with a ZEITRONIX....