How is that bump in timing controlled when the meth sprays?

 

You tune for it. You increase the timing when the meth starts to spray. My meth doesn't spray untill I hit 14 lbs of boost.

 

Well is it tuned, as in like say you hit 14 lbs at 4700 rpm, thats when its mapped to bump timing and the meth operates on a window at that point, or is there a more sophisticated way of setting up when you can manually control (or at least turn on and off) the meth spray and the accompanying bump in timing activate? [hopefully that makes sense]

 

The meth has a boost refrence and turns on when it senses 14lbs. The the tuner looks at what the a/f ratio does when the meth comes on and pulls fuel out to get it back to 11.5:1. Once he has that right he adds timing untill it either pings or power starts to drop. In my case power started to drop from to much timing without pinging.

 

Not discrediting what you are doing Ox, but seriously I know you have alot of money tied up in your build and you would risk that just to add more power?? Only reason I have the meth injection was before I bought the short block I was running my blower with PI swapped heads which of course has a higher compression ratio so adding the meth did help with the cooling/octane factor. I left it on with the new short block in leui of some kind of intercooler. Now that I want to add the air-to-air I no longer need the meth injection. Never wanted to atempt to add large amounts of timing with meth and have it fail. It does not really matter what brand kit you have, they are all prone to failure! Seriously, how many big name engine builders and/or blower companies sanctify the use of meth as a power adder!

 

Meth/water or just water injection has been used for a very long time. I know my dad used to use water injection on his nova when he was a teenager. Meth/water is used in instead of race gas. Big name racers and engine builders don't have to worry about filling their tanks with $16 a gallon fuel since they have sponsors. But average joe racer and car builder have been using it since the 70's.

If I go into boost and get over 14lbs and don't see my green LED come on I know the pump didn't kick on and I get out of it quick. The whole reason I added meth was to add more power. Just spraying it without tuning for it is worthless just like adding an intercooler and not tuning for it.

 

I know that, mine was tuned perfectly for it but not with added timing as just a cooling charge

 

I understand that but meth is designed to add power not just cool the charge. Just like with an intercooler you tune for it by adding timing but meth is more consistent then an intercooler.

If you are tuned on a 60* day with just an intercooler and the IAT is 110* but on a 90* day the IAT will be 140+*. With meth on a 60* day the IAT will be 40* and on a 90* it will be around 70* but you will have the safety feature of the added octane to protect against detonation. But with intercooler and meth on a 90* the IAT will be around 50*.

Another thing you need to look at when building for safe power is actual engine cooling. Aluminum radiator, electric water pump and 7QT oil pan will give you even more safety agains detonation by keeping the combustion chamber cool.

 

i cant believe what i started lol..tws you can add this meth thread to your sticky

 

Yea, but my point is do you really and honestly trust your meth injection system to be fail proof while adding extra timing? Do you run an aftermarket ignition system to pull timing if your meth injection fails??? You cannot rely solely on the IAT to pull timing