How much does temperature change HP on FI with meth?
How much does temperature change HP on FI with meth? I'm just wondering everyones thoughts on this? How much does outside temperature affect HP on a FI car with meth? On all my dyno runs, even after 12, my IAT's don't go over 105, and are usually about 80* on an 75-80* day. I'm assuming even when its 95* that they will be similar but I know air density changes. So say I'm making 770RWHP on an 80* day, how much would it be down on a 90-100* day if IAT's remained constant but ambient temps were closer to that 90-100*?
I know on a car without meth it is affected quite a bit but I don't know if that is mainly because of IAT's or air density?
I know on a car without meth it is affected quite a bit but I don't know if that is mainly because of IAT's or air density?
I have no dyno numbers to back it up but I guess 5-10 hp because of the air. Meth may cool the charge but it may not as be as low on a hotter day. Plus on hotter humid days boosted cars tend to be a little fat on the afr add that in with the meth and it may not feel as fast as it should. A good way to tell is to see if its pulling timing due to heat. I did some testing today it was 97-100 degrees today and crusing I was seeing 90 degree intake temps and on the meth it was around 79-87 through the run. My car was tuned in 80+ degree weather so the only time i feel a differance in the the way it pulls if the temp was 75- degree or lower hope this provide some insight.
Well in temps below 75* I'm sure it will pick up quite a bit, it was tuned when it was 80*. I'm just wondering how much it will lose getting hotter. I was thinking like 50RWHP, which is fine, but if its anything like 100 I'll probably stay off beating on it. I bet in cool weather I'll pick up 50, maybe.
If its only 5-10 I'm not even sweating that. Anybody else have any input?
If its only 5-10 I'm not even sweating that. Anybody else have any input?
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I think you will lose HP, but not due to the IATs alone, its probably more likely going to lose power because of the lower boost number you will experience on a hot day with less dense air. You know by now what a few psi can do to HP after removing the hat and filter on your last dyno session 
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