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DISCUSSION => Swaps, Turbos, Buildups => Topic started by: Moritz on April 12, 2010, 07:46:18 AM

Title: Water/Meth on M42?
Post by: Moritz on April 12, 2010, 07:46:18 AM

Hi guys,

I know Water/Meth Injection is commonly used on Diesel and Turbo engines who create a big amount of heat.But the German general importer for Snow Performance water / meth kits featured some N/A BMWs and they had a HP gain from 13-35% (with a optimised engine management).

What do you think,would it be sensefull to use it on a M42?Did anyone try this on a N/A M42?Whats your opinion?

best regards,Moe

Title: Water/Meth on M42?
Post by: flyinglizard on April 12, 2010, 10:08:43 PM

Might help with more compression. The power wont get better unless you have detonation issues from high compression or boost,IMHO.

Title: Water/Meth on M42?
Post by: dwtaylorpdx on April 12, 2010, 10:27:42 PM

Alcohol does not improve power unless the compression is raised to take advantage of the higher knock resistance of the alcohol over gasoline. You can tune the car up a bit and get some bang for hte buck but its small. The alcohol does radically cool the valves off...
Good thing in a race motor... It takes almost 2x the methanol to run the engine for a given number of minutes as gasoline.

Dave

Title: Water/Meth on M42?
Post by: rob_e30 on April 13, 2010, 12:41:12 AM

We're running the Aquamist system with our engine, but run only water as our class rules don't allow any other fuel enhancements.  We could add timing, but choose to run it as an incremental safety margin on the pre-water injection tune.

Title: Water/Meth on M42?
Post by: deekay on April 14, 2010, 09:58:30 PM

planning on using it on my turbo setup. it's pretty well-documented, but i'll agree that it's probably not useful unless forced induction is already involved.