Finished my first time tuning, I think
I don't think you have to worry about doing any blocking. But, the comment about leaning out a tad and different loads are relevant. You don't need to dip in the 10.x AFR range.
What I would suggest is to trace through your maps for your various runs, some that are knock free and some that are knocking. Plot the points of load vs rpm and look at the curves and how they travel through the maps. If the knocking runs are hitting different cells, remove a degree of timing and try again.
f you are hitting the same cells with and without knock, it can simply be that you are on the threshold of knock. If that's the case, simply remove a degree or two of timing in that cell or area and go do several more pulls until it's clean on all runs.
If you still get some knock here or there, then it can be something causing it such as a downpipe hitting, etc.
What I would suggest is to trace through your maps for your various runs, some that are knock free and some that are knocking. Plot the points of load vs rpm and look at the curves and how they travel through the maps. If the knocking runs are hitting different cells, remove a degree of timing and try again.
f you are hitting the same cells with and without knock, it can simply be that you are on the threshold of knock. If that's the case, simply remove a degree or two of timing in that cell or area and go do several more pulls until it's clean on all runs.
If you still get some knock here or there, then it can be something causing it such as a downpipe hitting, etc.
So I figured out what happened.....
Originally when I was tuning my intake temp were around 11 degree C. Now in chicago whe started to get nice weather and my intake temp are now around 45
I have an IC but I'm sure that big of a change effects the manifold air temp by alot. I finally got my car to run without knocking but unfortiently it doesnt feel as powerful anymore.
The temperature change leads me to couple finds though. Please chime in if I understand this correclty.
1. I see it effected my A/F ratio by about .5. Before I was close to 11.5-11.7 now I was barely getting 11 -11.1
2. Timing, well, if I was knocking almost everywhere, I pulled it about 1 - 2 dagree everywhere.
3. MY BOOST!!!!! First of all, I was spiking at 27 and holding good boost around 25psi. Now, barely getting past 22 psi
Do all these sound right? I mean we went from having 30 degree (F) weather to about 70, and all these were effected so drastically?
If I had my boost perfectly setup in cold degree weather, could I just up the Boost Adder (psia) to gain back the couple PSI? I went from 14.8 to 15.0 psi and didn't see much difference in boost
Originally when I was tuning my intake temp were around 11 degree C. Now in chicago whe started to get nice weather and my intake temp are now around 45
I have an IC but I'm sure that big of a change effects the manifold air temp by alot. I finally got my car to run without knocking but unfortiently it doesnt feel as powerful anymore.
The temperature change leads me to couple finds though. Please chime in if I understand this correclty.
1. I see it effected my A/F ratio by about .5. Before I was close to 11.5-11.7 now I was barely getting 11 -11.1
2. Timing, well, if I was knocking almost everywhere, I pulled it about 1 - 2 dagree everywhere.
3. MY BOOST!!!!! First of all, I was spiking at 27 and holding good boost around 25psi. Now, barely getting past 22 psi
Do all these sound right? I mean we went from having 30 degree (F) weather to about 70, and all these were effected so drastically?
If I had my boost perfectly setup in cold degree weather, could I just up the Boost Adder (psia) to gain back the couple PSI? I went from 14.8 to 15.0 psi and didn't see much difference in boost
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Joined: Nov 2007
Posts: 1,507
Likes: 2
From: Trinidad
hey bro, thanks for mentioning me in the first post 
i have had much time recently and its not looking good in the future either, i hate work!
so i am guessinng your temp changed gradually. in Trinidad we have 30 degrees celcius all day everyday.
your timing looks good, what are ur spark plugs like? have u ever done a boost leak test? i think you could squeeze out more boost (my opinion).
in terms of the weather conditions, i recommend a full retune.
hope that helps.
i have had much time recently and its not looking good in the future either, i hate work!
so i am guessinng your temp changed gradually. in Trinidad we have 30 degrees celcius all day everyday.
your timing looks good, what are ur spark plugs like? have u ever done a boost leak test? i think you could squeeze out more boost (my opinion).
in terms of the weather conditions, i recommend a full retune.
1. I see it effected my A/F ratio by about .5. Before I was close to 11.5-11.7 now I was barely getting 11 -11.1 - less air is entering now so because of air density changing with temp.
2. Timing, well, if I was knocking almost everywhere, I pulled it about 1 - 2 dagree everywhere. - i guess your load changes and air temp changes.
3. MY BOOST!!!!! First of all, I was spiking at 27 and holding good boost around 25psi. Now, barely getting past 22 psi - Leak? 5 psi is a big loss.
i never had to deal with temp changes so someone has to "certify" my advice
2. Timing, well, if I was knocking almost everywhere, I pulled it about 1 - 2 dagree everywhere. - i guess your load changes and air temp changes.
3. MY BOOST!!!!! First of all, I was spiking at 27 and holding good boost around 25psi. Now, barely getting past 22 psi - Leak? 5 psi is a big loss.
i never had to deal with temp changes so someone has to "certify" my advice
hope that helps.
I wouldn't call them jagged. but the numbers in the map fluctuate within a point up and down and the all of it interpolated as the car requires. Unfortunately i lost most of my logs so i could show you a map to a placid fuel curve. I have found the evo only reacts in extremes - too rich or too lean. as long as the curve looks good driveability isnt typically affected.
So the other day I put in the s1 cams. Here is a before and after dyno. I thought I would get couple more ponies, but it is what it is. The dyno is weather corrected. Meaning the MAF sensor temp were used in Virtual dyno. (btw, why is Virtual dyno temps in fahrenheit and EvoScan is in celsius? )
So the other day I put in the s1 cams. Here is a before and after dyno. I thought I would get couple more ponies, but it is what it is. The dyno is weather corrected. Meaning the MAF sensor temp were used in Virtual dyno. (btw, why is Virtual dyno temps in fahrenheit and EvoScan is in celsius? )
Next, you need to tune your MIVEC and return your AFR & timing to get all the power out of the new cams.
Last edited by Boosted Tuning; Apr 7, 2010 at 09:27 PM. Reason: grammer
^ Well I can do that but going from 30 degrees of the last pull to about 70 on the next one would show no gain with cams. I can disable the weather temp off when I get home later.
As for tuning, I already adjusted MIVEC and AFR and had to pull back timing. I'm in the 11.6 - 11.9 AFR range, boosting to 25-26 psi and the car just HATES timing.
As for tuning, I already adjusted MIVEC and AFR and had to pull back timing. I'm in the 11.6 - 11.9 AFR range, boosting to 25-26 psi and the car just HATES timing.
Registered User
Joined: Nov 2007
Posts: 1,507
Likes: 2
From: Trinidad
^ Well I can do that but going from 30 degrees of the last pull to about 70 on the next one would show no gain with cams. I can disable the weather temp off when I get home later.
As for tuning, I already adjusted MIVEC and AFR and had to pull back timing. I'm in the 11.6 - 11.9 AFR range, boosting to 25-26 psi and the car just HATES timing.
As for tuning, I already adjusted MIVEC and AFR and had to pull back timing. I'm in the 11.6 - 11.9 AFR range, boosting to 25-26 psi and the car just HATES timing.
what kinda of timing u hitting? spark plugs?
Hi Rolly,
After that last dyno, my car developed some nasty knock the next day. Not sure why. But at 6k I was hitting 13-15 counts all the time. I had to richen her up a bit, pull back timing, and then even pull back some boost to get it back to normal. At this point I think I'm around 11 degree of timing at red line. Not too impressive.
So far after the s1 cams, I don't see too much of a power difference as of right now. for the last 2 days I had to pull even more timing in the mid range so the dyno graph looks like before the cams (if not couple hp less).
I will be getting new plugs this week to see if it helps. Also I might need to redo my tuning style. Before my car being lean and alot of boost (25-27 psi). Defiently doesnt like that anymore. Maybe add a bit more fuel (currently at 11.7-11.9) pull back boost to about 24-23 psi and add more timing to see what happens
After that last dyno, my car developed some nasty knock the next day. Not sure why. But at 6k I was hitting 13-15 counts all the time. I had to richen her up a bit, pull back timing, and then even pull back some boost to get it back to normal.
At this point I think I'm around 11 degree of timing at red line. Not too impressive. So far after the s1 cams, I don't see too much of a power difference as of right now. for the last 2 days I had to pull even more timing in the mid range so the dyno graph looks like before the cams (if not couple hp less).
I will be getting new plugs this week to see if it helps. Also I might need to redo my tuning style. Before my car being lean and alot of boost (25-27 psi). Defiently doesnt like that anymore. Maybe add a bit more fuel (currently at 11.7-11.9) pull back boost to about 24-23 psi and add more timing to see what happens
