well I posted this on pipes boost and juice , but didn't get a single hit , so I thought Id try here
so as the weather has gotten cooler , I've gained a couple pounds of boost , a/f is reading 12.3 so I was playing with my progressive methanol controller to see if I could lower it , after a few runs (in 40 degree weather ) I found the sweet spot , I have the meth coming on at 4#s of boost and set the max to 17#s (at this temp only making 15#s) car is freaking amazing !! pulls like a S.O.B. a/f now reading 11.4-11.6 . meth + air to air. dropped inlet temps 30 + degrees !! now I wondering is this safe to do ?? or do ya think I need a new tune for the added boost ? Im thinking the meth adds more fuel , and makes it more rich to compensate for the added boost . opinions ???????

 

How many additional pds of boost are you seeing? I think as long as you have meth coming in, you're giving it enough juice to be safe. Your A/F ratios looks safe enough as well.

 

went form 13 to 15 , I was thinking the same , just wanted more opinions on it . 2#s makes it feel like a whole different car ! , oh and im using 100% meth , so it shouldn't lean out

 

Yeah you should be solid. Just keep an eye on the A/F's. I would suspect your car can supply the fuel needed even without the Meth, but I guess it depends on what boost it was tuned for. Mine was tuned for the 12 psi pulley, but depending on the time of yeah I see anywhere from 9-12.

 

Im thinking the meth adds more fuel , and makes it more rich to compensate for the added boost . opinions ???????

This has been our experience with methanol injection. Running at 22 lbs boost, IATs were way too high, for whatever reason. The methanol injection lowered them by about 80 degrees. So we contued to use 100%, not for any extra octane value, but to keep the IATs in check.

We then discovered (the hard way...booooom), that the stock intake manifold does a lousy job of distributing the mixture evenly between cylinders (with some running rich, others lean). This may only be a problem at very high boost levels???

With new build, if the IATs behave on their own, we will leave the methanol alone and if we have to use it, it will be at a greatly reduced mixture strength. Also we switched to the JPC intake manifold for the promise of addressing the uneven gas distribution, per cylinder. A problem incidentally encountered by others using high boost.

 

[QUOTE=forensicsteve;7309403]Im thinking the meth adds more fuel , and makes it more rich to compensate for the added boost . opinions ???????
in check.

We then discovered (the hard way...booooom), that the stock intake manifold does a lousy job of distributing the mixture evenly between cylinders (with some running rich, others lean). This may only be a problem at very high boost]

now this is something I didn't consider , but makes perfect sense , I 'm thinking that being that I 'm running low boost I 'll b fine . just nice to have as much info from all angles , thanks fellows , and anyone else please chime in !

 

Could try a diluted mix of methanol and see what your temps and air fuel ratios do. Most kits come as a 49% methanol / 51% water to keep it non-flammable.