Questions about turbo IAT's, meth, and other fun stuff!
#1
Questions about turbo IAT's, meth, and other fun stuff!
Combo is Lq9, s475 (t6), 26x12x4" intercooler, 12psi, 10:1, 93 octane, 80lb (@3bar) injectors.
Running around in 60* weather my iat's sit around 80* and will go up to about 110* during a pass @ 12psi. Since this is Texas, this car will not have the luxury of seeing these cool ambient temps all year, so I suspect that when it is 100+* outside my IAT's are going to be very high.
My meth kit is "homemade" and already installed (although I have never used it) I am using the Shurflo diaphram pump, a alkyinjection check valve, and a 14gal/hr nozzle installed a few inches in front of my fast acting IAT sensor (right before the throttle blade), and a pressure switch from alkyinjection.
So my first question is what is an appropriate IAT range, at what temp do you start having problems? I have it start pulling 1* at 122*, 3 @ 131, 5* @ 140, etc.
With that said, I doubt I'll be able to stay under 122* when it's 100* outside without meth/alcohol injection. So would it be smart to hold off on the injection until the ambient temps get to a point that it is required? I see that a lot of the kits are "progressive", mine will not be, just based on the pressure switch, is this an okay way to do it? I understand that some kits feature fail safes, but I was thinking I could just be aggressive with pulling timing via the IAT table as a failsafe. Any opinion here?
Thanks!
Running around in 60* weather my iat's sit around 80* and will go up to about 110* during a pass @ 12psi. Since this is Texas, this car will not have the luxury of seeing these cool ambient temps all year, so I suspect that when it is 100+* outside my IAT's are going to be very high.
My meth kit is "homemade" and already installed (although I have never used it) I am using the Shurflo diaphram pump, a alkyinjection check valve, and a 14gal/hr nozzle installed a few inches in front of my fast acting IAT sensor (right before the throttle blade), and a pressure switch from alkyinjection.
So my first question is what is an appropriate IAT range, at what temp do you start having problems? I have it start pulling 1* at 122*, 3 @ 131, 5* @ 140, etc.
With that said, I doubt I'll be able to stay under 122* when it's 100* outside without meth/alcohol injection. So would it be smart to hold off on the injection until the ambient temps get to a point that it is required? I see that a lot of the kits are "progressive", mine will not be, just based on the pressure switch, is this an okay way to do it? I understand that some kits feature fail safes, but I was thinking I could just be aggressive with pulling timing via the IAT table as a failsafe. Any opinion here?
Thanks!
#2
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What did you come up with for total timing? And plan on tuning for the summer not right now, but right now the weather gives you room for error.
Get a good base and adjust as things get hotter
Get a good base and adjust as things get hotter
#3
seems like 12 psi on pump gas can take ~11 degrees total advance safely, might try to taper in a couple of degrees towards the top of the rpm band, but for now i have it taper down to 11 degree @ full boost and stay there.
if i add the meth injection or run race gas i guess i'll put some timing back into it.
if i add the meth injection or run race gas i guess i'll put some timing back into it.
#4
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Bro you think its crazy now wait until you get some timing into it.hit it with the meth and add some timing. I even pulled some fuel on my car but if you do that you better have your ducks in a.row. With the meth I tuned it on the dyno and add 4degs and picked up 50rwhp total of 16 degs this was on my stock ls1,317 heads, ZO6 cam
#5
Bro you think its crazy now wait until you get some timing into it.hit it with the meth and add some timing. I even pulled some fuel on my car but if you do that you better have your ducks in a.row. With the meth I tuned it on the dyno and add 4degs and picked up 50rwhp total of 16 degs this was on my stock ls1,317 heads, ZO6 cam
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#8
FormerVendor
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For instance-
I typically see the same as you, +20 ambient start of dyno pull, and typically see a 60-80* delta in temp.
With the meth, Ill see as cold as 40-50* pre pull, and 100 post pull. In this case, I would pull 2* @ 100, 4*@110 6*@120 and totally neuter it @ 10* for 130*.
this way, it will surely fall on its face.
When it falls on its face, its alive still, and you are wondering why its falling on its face?
Meth isnt working.
Oh, I fogot to add meth to the tank Or the pumps broken, or the line fell off. This is MUCH better than saying, well, **** the motor is toast.
Louis
I typically see the same as you, +20 ambient start of dyno pull, and typically see a 60-80* delta in temp.
With the meth, Ill see as cold as 40-50* pre pull, and 100 post pull. In this case, I would pull 2* @ 100, 4*@110 6*@120 and totally neuter it @ 10* for 130*.
this way, it will surely fall on its face.
When it falls on its face, its alive still, and you are wondering why its falling on its face?
Meth isnt working.
Oh, I fogot to add meth to the tank Or the pumps broken, or the line fell off. This is MUCH better than saying, well, **** the motor is toast.
Louis
#12
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In combination with what Louis has said I also add fuel at the same temps the IAT pulls timing. It dumps a ton of fuel and pulls timing in case of a meth failure. I do this on all boosted meth setups and it saved my friends old GTO mutiple times when his meth controller was being flakey. Not sure what operating system you're running but I recommend installing the 01-02 operating system as it has it's advantages.
#13
In combination with what Louis has said I also add fuel at the same temps the IAT pulls timing. It dumps a ton of fuel and pulls timing in case of a meth failure. I do this on all boosted meth setups and it saved my friends old GTO mutiple times when his meth controller was being flakey. Not sure what operating system you're running but I recommend installing the 01-02 operating system as it has it's advantages.
#16
FormerVendor
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Yes, 5* I would consider no timing. Again, depends on the boost and the setup though.
If you use the bi-directional controls in the scanner, you can pull 10* on the dyno or street and really see/feel the difference. itll knock off 200+ hp. Very much an indicator that the meth has broken
If you use the bi-directional controls in the scanner, you can pull 10* on the dyno or street and really see/feel the difference. itll knock off 200+ hp. Very much an indicator that the meth has broken
#17
Yes, 5* I would consider no timing. Again, depends on the boost and the setup though.
If you use the bi-directional controls in the scanner, you can pull 10* on the dyno or street and really see/feel the difference. itll knock off 200+ hp. Very much an indicator that the meth has broken
If you use the bi-directional controls in the scanner, you can pull 10* on the dyno or street and really see/feel the difference. itll knock off 200+ hp. Very much an indicator that the meth has broken
#19
9 Second Club
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Yes I was refering to the PE vs IAT table. Low timing + rich for a split second won't hurt anything in a 1/2 second while you realize something is up. I prefer the 01-02 operating system over the 04 as it has a much higher resolution in the VE tables. I always run 100% meth and don't mess around with washers fluids that might be 30% meth. Go pour some -30 degree washer fluid on the ground and light it on fire, it's plenty flamable.