Pure meth, IAT's and 2 step
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR
The PCM has a truck OS from 2002. 3 bar of course.
I'll check this evening
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR
I'm curious why your IAT numbers are so much higher than mine. I'd be freaking out if I were seeing them as high as yours on the truck. Can you get the methanol to come on later like 10psi or so so when you stand on the 2-step you've got some margin in there with it off? I'm still for having the nozzles before the sensor, but as you previously mentioned, the best spot for the IAT is in the manifold, hands down, then you wouldn't use the complex method.
This
Is how a daily driver should be set, such that if the meth runs dry, you are still in a safe region. Very good way to setup a reliable combination for daily service.
The only con is that the tune is typically "too safe", when the meth is actually on, you are leaving some power on the table, there is a trade off between safety and output. That is how we distinguish a competition vehicle vs daily drivers: competition calls for every trick to be used, we will push the meth to it's limit, and the engine will not be safe all else being equal without it.
In both cases, F@(#* the IAT sensor. Sure, if its there, look at it. But don't use it to tune anything except cold weather/cold start conditions. When IAT climbs the OEM solution is to pull fuel. Funny, because when Coolant temps rise too high we typically add fuel. Its like they cant decide which way to go with it.
The only con is that the tune is typically "too safe", when the meth is actually on, you are leaving some power on the table, there is a trade off between safety and output. That is how we distinguish a competition vehicle vs daily drivers: competition calls for every trick to be used, we will push the meth to it's limit, and the engine will not be safe all else being equal without it.
In both cases, F@(#* the IAT sensor. Sure, if its there, look at it. But don't use it to tune anything except cold weather/cold start conditions. When IAT climbs the OEM solution is to pull fuel. Funny, because when Coolant temps rise too high we typically add fuel. Its like they cant decide which way to go with it.
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR
I'm curious why your IAT numbers are so much higher than mine. I'd be freaking out if I were seeing them as high as yours on the truck. Can you get the methanol to come on later like 10psi or so so when you stand on the 2-step you've got some margin in there with it off? I'm still for having the nozzles before the sensor, but as you previously mentioned, the best spot for the IAT is in the manifold, hands down, then you wouldn't use the complex method.
At any rate, you won't see a huge temp rise on short blasts while driving around. Remember, we are running laps and going 1/4 miles at a time at 23psi.
The IC gets heat soaked.
Next test we need to figure out how to measure temps on the inlet side of the IC.
And yes, we will reset the meth so it starts at a higher boost level.
I'm definitely interested in hearing what change(s) you make to get this resolved man, that's got to be frustrating. You're right, I'm on city streets so doing much over 100 for short bursts is really sketch. You're also right that 23psi is a whole different ball game. =( I hope you can get this ironed out man, I really like your setup.
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9 Second Club
Joined: Nov 2003
Posts: 13,616
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From: Norn Iron
If your pre IC charge temps really are that bad, just slap a few thermocouples in them, if you get the ones with the small tip they're pretty fast acting.
Innovate TC-4 is fairly cheap and will let you run 4 thermocouples.
http://www.innovatemotorsports.com/products/tc_4.php
Although still a fairly expensive test excersize.
Innovate TC-4 is fairly cheap and will let you run 4 thermocouples.
http://www.innovatemotorsports.com/products/tc_4.php
Although still a fairly expensive test excersize.
Do not spray methanol on the 2-step. It will kill spool and may even bog you off the line. Best way to setup the meth is to turn it off during 2-step operation. The Alkycontrol kit has a purple wire, that when grounded, kills the pump. If I remember correctly. Add this to your 2-step switch/button and it should cut the alky when building. Once you let off the 2-step, the alky will trigger as per usual. Moving the trigger pressure up will just make it take longer for methanol to ramp in. IMO, I would want alky firing as soon as boost hits off the 2-step.
Didnt read the whole thread so someone may have said this already....but you could throw a T-Type (blue - read up to 872 deg F) thermocouple with a swagelok fitting in the intake manifold downstream of the METH nozzle, and temporarily read it with a cheap multimeter that has a thermocouple input. Then you will know where your actually at.
I spray my stock MAP sensor in the manifold on my ecoboost and have no issues. I like it that way so I can monitor and tune for real intake manifold charge temps and will see if the nozzle gets clogged or the system fails based on IAT's.
I spray my stock MAP sensor in the manifold on my ecoboost and have no issues. I like it that way so I can monitor and tune for real intake manifold charge temps and will see if the nozzle gets clogged or the system fails based on IAT's.
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR
I'm definitely interested in hearing what change(s) you make to get this resolved man, that's got to be frustrating. You're right, I'm on city streets so doing much over 100 for short bursts is really sketch. You're also right that 23psi is a whole different ball game. =( I hope you can get this ironed out man, I really like your setup.
I'm just the tuner.
Sadly he doesn't live close, so I'm not hands on with it.
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR
Do not spray methanol on the 2-step. It will kill spool and may even bog you off the line. Best way to setup the meth is to turn it off during 2-step operation. The Alkycontrol kit has a purple wire, that when grounded, kills the pump. If I remember correctly. Add this to your 2-step switch/button and it should cut the alky when building. Once you let off the 2-step, the alky will trigger as per usual. Moving the trigger pressure up will just make it take longer for methanol to ramp in. IMO, I would want alky firing as soon as boost hits off the 2-step.
Ron
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR