Boost Cooler?
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From: Huntington Beach, CA
Originally Posted by GDM S2K,Aug 12 2008, 05:04 PM
93 fuel is already at about 4 bucks spend the extra buck and get some vp 100 if its not going to be your daily
and it's garbage 91 too.
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Originally Posted by brilliant,Aug 13 2008, 12:25 PM
those of us in cali get 91.
and it's garbage 91 too.
and it's garbage 91 too.
whats the price of 91 anyway?
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From: Hong Kong/California
Originally Posted by GDM S2K,Aug 13 2008, 10:19 AM
I can only imagine what 91 fuel quality is with the "up to 10% ethanol" in it....
whats the price of 91 anyway?
whats the price of 91 anyway?
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From: Phillips Ranch 909!
Originally Posted by GDM S2K,Aug 13 2008, 10:49 AM
Ouch, now I see why so many people on the west coast go with meth, 4 bucks and change for garbage
Thats why i'm going to put a kit on also...
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From: PDX west
Originally Posted by jwa4378,Aug 11 2008, 05:12 PM
My main question would be if there are fail-safe measures to prevent detonation if the unit fails, are the adjustments (pulling timing, etc.) based on intake temp readings, or the output of the meth unit (unit sends signal to EMS, telling it that it is on and functioning)? If it does it based on whether the unit is "on" or "off" as opposed to threshold parameters on a result (intake temp) . . . .
S2Kart - How did your AFR go down with the meth working? I would think it would be the opposite (cooler air, plus water = more oxygen. More oxygen + same injector duty cycle + more timing = more lean mixture). I know it is injecting some methanol, but I did not think it was that much when compared to the water component (% wise) of the mixture. Assuming your ECU is pulling timing when the meth is not running, that would result in less fuel being burned, and a more rich mixture being pulled out the exhaust... This is just thinking about theory.... I have very little experience with meth injection, personally...
John
S2Kart - How did your AFR go down with the meth working? I would think it would be the opposite (cooler air, plus water = more oxygen. More oxygen + same injector duty cycle + more timing = more lean mixture). I know it is injecting some methanol, but I did not think it was that much when compared to the water component (% wise) of the mixture. Assuming your ECU is pulling timing when the meth is not running, that would result in less fuel being burned, and a more rich mixture being pulled out the exhaust... This is just thinking about theory.... I have very little experience with meth injection, personally...
John
Right now I'm changing my Shurflo pump out for an Ulka 200psi unit ($62).
I'm no expert on this stuff, but from what I've read the methanol is the extra fuel that accounts for the richer AFR. The additional oxygen is proportionally small, since only 21% of air is oxygen. The main benefit of meth/water injection is the "latent heat" function during combustion. The auto ignition point is lower, letting you up the compression and/or get some timing back. Anyways theres tons of info on the net.
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From: Tallahassee, FL
Thanks guys. I may consider it now, as temps down here in FL get really crazy in the summer (the armpit of the south... no wind, just stagnant humid heat).
I think the methanol has an octane rating of around 113, I believe (if I remember chemistry class all those years back 
). This would boost the octane rating, but you are not spraying just methanol. 
I believe the mixture is mostly water. And water is 66% oxygen... the water coupled with the extra air due to denser intake charge should result in a good bit more oxygen added than methanol...
then again, I am no scientist either. It "seems" backwards to me, but I am sure there are physics behind it... it makes sense that since meth allows you to run more timing, it would result in a richer mixture if you added it without adding the timing... I am just 
.
John
I'm no expert on this stuff, but from what I've read the methanol is the extra fuel that accounts for the richer AFR. The additional oxygen is proportionally small, since only 21% of air is oxygen. The main benefit of meth/water injection is the "latent heat" function during combustion. The auto ignition point is lower, letting you up the compression and/or get some timing back. Anyways theres tons of info on the net.
). This would boost the octane rating, but you are not spraying just methanol. I believe the mixture is mostly water. And water is 66% oxygen... the water coupled with the extra air due to denser intake charge should result in a good bit more oxygen added than methanol... then again, I am no scientist either.
It "seems" backwards to me, but I am sure there are physics behind it... it makes sense that since meth allows you to run more timing, it would result in a richer mixture if you added it without adding the timing... I am just .John
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From: PDX west
Originally Posted by jwa4378,Aug 13 2008, 04:29 PM
Thanks guys. I may consider it now, as temps down here in FL get really crazy in the summer (the armpit of the south... no wind, just stagnant humid heat).
I think the methanol has an octane rating of around 113, I believe (if I remember chemistry class all those years back ). This would boost the octane rating, but you are not spraying just methanol. I believe the mixture is mostly water. And water is 66% oxygen... the water coupled with the extra air due to denser intake charge should result in a good bit more oxygen added than methanol...
then again, I am no scientist either.
John
I think the methanol has an octane rating of around 113, I believe (if I remember chemistry class all those years back
). This would boost the octane rating, but you are not spraying just methanol. I believe the mixture is mostly water. And water is 66% oxygen... the water coupled with the extra air due to denser intake charge should result in a good bit more oxygen added than methanol... then again, I am no scientist either.
John
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From: Raleigh, NC
The water doesn't get cracked. It just flashes to steam and takes the heat with it. The main benefit is its temperature difference. The finely atomized droplets soak up heat in the air charge and lower its temp.