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| How much water is used with water injection? https://www.slantsix.org/forum/viewtopic.php?t=67706 |
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| Author: | Tim Keith [ Tue Apr 09, 2024 1:07 pm ] |
| Post subject: | How much water is used with water injection? |
Water-methanol injection can help prevent knocking. Here in South Texas freezing is only possible a few nights a year so that straight water could be used. I'm only considering 9 ish CR. How much water is typically used? |
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| Author: | Dart270 [ Tue Apr 09, 2024 5:03 pm ] |
| Post subject: | Re: How much water is used with water injection? |
It depends on how much you are on the throttle. Mid to WOT will be where it gets used. I assume you want to run 87 octane and a small or stock cam? When I drive around normally in my turbo/supercharged Dart I don't use much unless I am having lots of fun. I think of it roughly as needing about a gallon of WW fluid per tank of gas, with some fun bursts here and there. Note that if you run high CR with low octane, it also may diesel when you shut it off or run a bit hotter. Thoughtful tuning of the timing curve will be needed. Lou |
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| Author: | Tim Keith [ Tue Apr 09, 2024 11:59 pm ] |
| Post subject: | Re: How much water is used with water injection? |
Thanks for the response. I had just watched a YT video on water injection of a turbo motor. The diesel people use it too. - helps clean the injectors . For me, it's not a fail when the reservoir runs dry. I think it falls into the "can't hurt" category, unless too much is used. With the warm days in South Texas, the motor can ping. |
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| Author: | Dart270 [ Wed Apr 10, 2024 3:23 am ] |
| Post subject: | Re: How much water is used with water injection? |
Pinging/knocking won't hurt unless you hold down the throttle a while (several seconds or more). If your exhaust is quiet, you can hear it. Lou |
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| Author: | Jase [ Wed Apr 10, 2024 7:13 am ] |
| Post subject: | Re: How much water is used with water injection? |
What brand of water injection system is the best to use? |
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| Author: | Dart270 [ Wed Apr 10, 2024 11:16 am ] |
| Post subject: | Re: How much water is used with water injection? |
I have used the AEM system (for boost) and it works well. So then I have never bothered with an intercooler... Lou |
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| Author: | Jase [ Thu Apr 11, 2024 7:05 am ] |
| Post subject: | Re: How much water is used with water injection? |
Thanks Lou, I did not even know they were in the water injection business... I will look them up. |
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| Author: | Dart270 [ Thu Apr 11, 2024 10:51 am ] |
| Post subject: | Re: How much water is used with water injection? |
They have a non-boost and a boost version. I bet the directions for the non-boost version talk about strategies for tuning. AEM products have been amazingly good to me. Lou |
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| Author: | Jase [ Thu Apr 11, 2024 6:39 pm ] |
| Post subject: | Re: How much water is used with water injection? |
There is a big disclaimer about race car only installation... I can understand that for emissions relevant vehicles, but for non emissions pre 1966 vehicles.. it would seem that they are exempt? |
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| Author: | Dart270 [ Fri Apr 12, 2024 5:12 am ] |
| Post subject: | Re: How much water is used with water injection? |
Almost all aftermarket parts say that. Liability and letters of some laws... Lou |
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| Author: | lgu32 [ Fri Apr 12, 2024 9:20 am ] |
| Post subject: | Re: How much water is used with water injection? |
Do you have E85 available? I use it for both fueling and intercooling. Compared to water its benefit is that it burns. |
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| Author: | Tim Keith [ Mon Jul 29, 2024 12:51 am ] |
| Post subject: | Re: How much water is used with water injection? |
The application would be a '85 D150 with 904. Under moderate load and 9:1 CR, would water injection be of benefit? What's a safe maximum CR for a truck that might occasionally tow 3,500 pounds? The truck is not rated to tow that much weight, I assume it's a limitation of the transmission. In this thread I'm concerned with fuel and spark timing. It's often 100F here in South Texas Tim |
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| Author: | MadScientistMatt [ Sat Aug 24, 2024 11:42 am ] |
| Post subject: | Re: How much water is used with water injection? |
Unless you're trying to do some sort of lean burn tuning while passing emissions, I don't think water injection would be that much benefit for that build; it's not a lot of compression and does not really sound like you're running it on the edge of detonation if everything is working well. Especially not at moderate load - if it has detonation issues at moderate load but not full throttle, you're running too much vacuum advance. |
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| Author: | Tim Keith [ Sun Oct 13, 2024 2:28 pm ] |
| Post subject: | Re: How much water is used with water injection? |
Thanks Matt. I searched for welded quench pads and dished zero deck pistons - to push the CR limits on a daily driver D100. I thought water injection could be extra insurance. I mentioned a lower CR because I can't throw money away on something that can't work. I thought I'd start with moderate CR. I see many lightly abused OBS Chevy longbeds that have high miles but maybe need a transmission. I think I'll give up a couple mpg for a 4.3 v6 or 4.8/5.3 swap. In South Texas these don't rust and many used them for daily commuters so they still look okay. I love my 3 Dodge trucks, actually five - a Dakota and a '47 1/2 ton. . If I can occasionally tow 5,000 pounds with a slant six that might make me happy. Be fun to see somebody build a welded quench pad S6 in a torque focused truck, maybe with a turbo or M90. Tim |
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