Prometh Volute methanol injection able to get another 2-3 psi out of a compressor and increase efficiency?
Published on 11-06-2018 03:12 PM
This is an interesting setup and drag racers have messed around with volute injection for a while now. Essentially, you are spraying water/methanol directly into the compressor housing. Prometh says this increases the efficiency of the compressor output.
Here is the claim:

Originally Posted by
Prometh
Our volute injection kits are becoming more and more popular with builders for both street and strip applications. Originally came about as a way to get around the rules in different classes of drag racing that banned our pre compressor injection. It’s now becoming more and more popular for street applications due to how compact and effective it is at lowering discharge temps while increasing the compressors output and efficiency.
Let's say you are spinning a blower to max rpm or even overspinning it and generating quite a bit of heat. Well, this solution would in theory drop temps and possibly provide 2-3 more psi of boost.
That is what Prometh tells BoostAddict:

Originally Posted by
Prometh
Volute injection has the advantage of improving the compressor efficiency while else reducing air charge temps. If you inject after the compressor, in the charge pipe, you will lower air charge temps but no effect on the compressors efficiency.
The general idea is to spray before the compressor. It would be great to see some before/after results with the volute injection. There is no reason this would not work in theory on turbochargers as well.
vBulletin Message