SC, stock pulley, stock timing
Methanol Injection: What Are The True Performance Gains? (1 Viewer)
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I know a lot of you guys have a scan gauge or similar so this isn't so hard. Set it to display ign. timing and post up what it is.
I think it's time for everyone to start understanding what is going on instead of guessing.
Personally I think a water/meth injection system on an OBDII truck is a waste of money and only adds cost to operating the vehicle. And with your data I can explain why or proved wrong.
I think it's time for everyone to start understanding what is going on instead of guessing.
Personally I think a water/meth injection system on an OBDII truck is a waste of money and only adds cost to operating the vehicle. And with your data I can explain why or proved wrong.
inkpot
SILVER Star
I have a stock SC setup on my 97, and I have a Scanguage II. When I get into if hard, the timing DROPS way down, like 7 or so. Anybody else seeing this?
anybody who takes the time to look
yes it is. It's a programmed response within the ECU. The program range for the MAF sensor is from 1.1v~3.9v. If the MAF voltage exceeds the 3.9v mark timing is pulled.
On a NA truck I was able to get the MAF voltage up to 3.89v and the timing would never pull. So basically as soon as you flow more air than stock it reacts.
On a NA truck I was able to get the MAF voltage up to 3.89v and the timing would never pull. So basically as soon as you flow more air than stock it reacts.
inkpot
SILVER Star
Ok. So how do we, should we modify the system to get more advance? It always feels like there is more potential power there, but it just doesn't use it all
You shouldn't. You are supposed to pull 1.5-2 degrees of timing for every pound of boost.
inkpot
SILVER Star
So that would be around 12 degrees to pull back at maximum on a stock TRD SC setup. What is Max timing advance on a stock N/A rig at WOT?
inkpot
SILVER Star
So if Landtank is getting 40 degrees advance at 4800 rpm then I should be seeing 28 degrees instead of 7 ??
If you want that go standalone 
Someone has been saying for quite a while now that the TRD system is not ideal and was just a patchwork system. You are just giving the truck enough extra air to put it in open loop around the right time, and you are just relying on the MAF load tables to pull some timing to keep it all together. It was not "engineered" in any way shape or form.
Someone has been saying for quite a while now that the TRD system is not ideal and was just a patchwork system. You are just giving the truck enough extra air to put it in open loop around the right time, and you are just relying on the MAF load tables to pull some timing to keep it all together. It was not "engineered" in any way shape or form.
I've modyfied my truck to avaiod the pull .I'm running 87 octane and am not worried about it
I would wait until summer temps before you make that claim. I have heard stock TRD setups rattle like a tin can filled with marbles in Texas summer heat on 87.
what claim did I make? I just made a statement.
Implied claim is that your modification has eliminated all knocking associated with low octane.
What did you do?
What did you do?
no, I claimed that I removed the timing pull. The timing pull, in this case, is a programmed response when the MAF voltage exceeds 3.90volts.
My reference to the 87 octane was that I have no detonation with this pull removed even with 87 octane.
And to the subject of this thread, our trucks run an AFR of 10:1 during boost and with this inherent timing pull I don't see any value in adding methanol injection even for added safety.
My reference to the 87 octane was that I have no detonation with this pull removed even with 87 octane.
And to the subject of this thread, our trucks run an AFR of 10:1 during boost and with this inherent timing pull I don't see any value in adding methanol injection even for added safety.
And all I meant was if you haven't run your setup in the summer heat, I would wait until you have before you make your final decision. I have seen 80's with the stock TRD system, detonate heavily with the timing pull in hot summer conditions when they run 87 octane. Right now you are in about the best conditions possible for FI. You have very cold air. Once that intake air is hot and you don't pull any timing and your not running a fuel that resists knock, I would not be so sure you would want to remove the timing pull.
inkpot
SILVER Star
In the summer heat in the Phoenix area, and running 92 octane cause that's what we get here, and my timing set up to 7 degrees, , I do get knock around 4200-4600 rpm when I am pushing it in 2nd or 3rd gear. With the timing set at 3 or 4 degrees, I do not get it. Also, it does not seem to be a problem in cooler temperatures of winter time. I am interested in how much timing the ECU can pull. I am also interested in how to reduce/remove that "PULL", and then I can adjust my timing down, or my octane up, to resolve the issue. Water/meth injection may be another tool in the effort to gain more power. So, is this a kit that Joey is going to offer in the future??
NLXTACY
Wits' End
So, is this a kit that Joey is going to offer in the future??
The Snow Peak Stage 2 MAF kit isn't the way to go? Not sure how I can improve on it.
