Supercharged/Turbocharged The increase in air/fuel pressure above atmospheric pressure in the intake system caused by the action of a supercharger or turbocharger attached to an engine.

Water/Methanol Injection

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Old 02-13-2005, 08:02 PM
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Water/Methanol Injection

I am looking to get this in the next week or two and i have a couple of questions.

1) Is there boost loss when using this(i read a thread about water injection that mentioned this)

2) Are there gains in power? If so how much?

3) Is this the most effective way of cooling in respect to boost loss ?
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Old 02-13-2005, 08:14 PM
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go with it! water/meth decreases detonation, especially with you being in Louisiana
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Old 02-14-2005, 06:54 AM
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how is their boost loss?
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Old 02-14-2005, 07:37 AM
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i read a post about water injection y2kevse where he put this on his car and noticed a 2psi drop in boost
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Old 02-14-2005, 09:06 AM
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Chris - Get a dyno and get it tuned man~! You're throwing some serious **** at your car and you haven't even tuned it?

Don't worry about the drop in gauge pressure. That's a direct result of the cooler air taking up less volume, however colder/denser air means you'll make more power, if you *TUNE* your AFR to account for the leaner ratios you can run without detonation. The pressure drop is NOT the same as what people talk about with intercoolers.

Get the Aquamist system, it's worth it for non-intercooled SCs especially those in hot climates with 91-craptane fuel.
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Old 02-14-2005, 10:34 AM
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Originally Posted by IceY2K1
Chris - Get a dyno and get it tuned man~! You're throwing some serious **** at your car and you haven't even tuned it?

Don't worry about the drop in gauge pressure. That's a direct result of the cooler air taking up less volume, however colder/denser air means you'll make more power, if you *TUNE* your AFR to account for the leaner ratios you can run without detonation. The pressure drop is NOT the same as what people talk about with intercoolers.

Get the Aquamist system, it's worth it for non-intercooled SCs especially those in hot climates with 91-craptane fuel.

As soon as the headers are on this week i can get it tuned. + we have 93 octane down here bro for $1.94
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Old 02-14-2005, 10:57 AM
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Did you put in your injectors yet?

If not, I'd do that and get it tuned all at once.
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Old 02-14-2005, 12:27 PM
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Originally Posted by IceY2K1
Did you put in your injectors yet?

If not, I'd do that and get it tuned all at once.

No i forgot to tell you what happened. I had to bring them back for a refund because my books for school ended up costing more than i originally thought they would . I am going to get them this summer when i drop down to the 2.87 pulley.
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Old 02-15-2005, 07:59 PM
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water injection does work great for aiding in the prevention of detonation. It doesn't help all that much in helping to be able to turn up the boost. It works great on my busa.
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Old 02-16-2005, 10:54 PM
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Louisiana has good gas here. I went up to Colorado for a Ski/Snowboard trip over Mardi Gras week and wow 90 octane SH*T gas + high elevation = no power. Luckily I didn't bring my car but Frosty's 96 had fun going through the snow and highway 287. We do have a lot of heat and humidity but for performance I will take that over 90 octane and no air pressure.

Water/meth sounds like a really good idea but there are other things your need to get for your car first.

BTW It is too late so don't call me 2 minutes after I post this.
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Old 02-17-2005, 04:52 AM
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Originally Posted by fstbusa
water injection does work great for aiding in the prevention of detonation. It doesn't help all that much in helping to be able to turn up the boost. It works great on my busa.
But the point is to be able to turn up the boost. It reduce the threshold for onset of pre-ignition and detonation which usually are caused by high cylinder temps. It lowers the cylinder temps so you can up the boost and or dial some ignition advance.
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Old 02-17-2005, 04:54 AM
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http://www.turbomirage.com/water.html

I use this style of a DIY set up and it works just fine.
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Old 02-17-2005, 05:22 AM
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Water/methanol injection does lower cylinder temps, but it also slows down the burn rate of the fuel in the same way that higher octane fuel does. Slower burn rate means peak cylinder pressure occurs later and is not as high. This is just as important in preventing detonation as the lower cylinder temps. If detonation is suppressed, then boost can be increased.
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Old 02-17-2005, 06:12 AM
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This is some very informative stuff, this sounds like it is very beneficial. I think i am going to have to get this
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Old 02-17-2005, 06:31 AM
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i love this for some reason.

http://www.turbomirage.com/waterpix/waterinjection.gif
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Old 02-17-2005, 07:51 AM
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If you search, this has been discussed a few times before.

Originally Posted by chris'smax
This is some very informative stuff, this sounds like it is very beneficial. I think i am going to have to get this
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Old 02-17-2005, 08:26 AM
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Originally Posted by IceY2K1
If you search, this has been discussed a few times before.

Yea i have searched this topic. I went through almost every page in this forum but all the topics seemed to be on water injection only. I didn't know if methanol brought about any key importance in the setup
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Old 02-17-2005, 08:31 AM
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Methanol or any of the others you mix with the water just bump the effective octane rating.

I'd search the net for that info, but there is so much it's way more then you can absorb.

Originally Posted by chris'smax
Yea i have searched this topic. I went through almost every page in this forum but all the topics seemed to be on water injection only. I didn't know if methanol brought about any key importance in the setup
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Old 02-17-2005, 08:50 AM
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it kind of hard for him just to increase the boost because he would have to change pullies.
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Old 02-17-2005, 09:09 AM
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Originally Posted by IceY2K1
Methanol or any of the others you mix with the water just bump the effective octane rating.

I'd search the net for that info, but there is so much it's way more then you can absorb.

What the hell is that supposed to mean
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Old 02-17-2005, 09:11 AM
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Originally Posted by spanishrice
it kind of hard for him just to increase the boost because he would have to change pullies.

Yea i am already changing pullies anyways since i am taking the blower of and changing the belt due to a oil leak
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