boost and pump gas
i would consider meth if its necessary ... i guess i never took the time to fully understand it i know that the iat sensor controls timing according to air temp but stupid question from me is does the meth just spray the iat sensor to give it a different reading or does it actually go into the combustion chamber and cool things down? and i will be running on3's bigger intercooler idk im on a 5k budget when taxes roll in and im buying new and used stuff and will be doing all the labor except tune
Last edited by transaminator99; Jan 28, 2014 at 10:40 PM.
i would consider meth if its necessary ... i guess i never took the time to fully understand it i know that the iat sensor controls timing according to temp but stupid question from me is does the meth just spray the iat sensor to give it a different reading or does it actually go into the combustion chamber and cool things down? and i will be running on3's bigger intercooler idk im on a 5k budget when taxes roll in and im buying new and used stuff and will be doing all the labor except tune
Probably recommending it because he is going with a stock bottom end LS1 and talking about wanting to be safe on 10 lbs of boost. "Safe" is a relative term individually defined so I suppose it depends on your definition. To me pump gas and 10#'s of boost on a stock bottom end LS1 = ticking time bomb that will go boom soon. But I usually tend to be on the conservative side. Meth cools your IATs and your sensor will be effected by it, but your intake temps will be cooler and your octane raised. These are the two effects that it has that keep you far away from detonation and keeping safe. Computers and sensors can be tricked, so if all the meth did was "trick" you IAT sensor into reading lower, it would be something that could be done simpler than throwing away all that meth.
8 Second Club
Joined: Apr 2006
Posts: 1,011
Likes: 31
From: in my neighborhood
NO I HAVE NOT see I can type in caps too.. Guess why? Because (again) in MY opinion sub 600hp cars don't need it, ask me how I know.. I love how meth injection is a must have now a days.. You just can't have a safe FI motor without it 
if it where my money I'd spend it on a GOOD intercooler and a solid tuner.
Again this is my opinion so take it with a grain of salt. I like things to be simple and worry free. Comments made by the OP lead me to believe he feels the same way. I don't like nitrous/meth because you have be bothered with filling bottles and worrying about something failing. Meth works there is no doubt but at the end of the day a damn 550rwhp car setup correctly just doesn't need it.
if it where my money I'd spend it on a GOOD intercooler and a solid tuner. Again this is my opinion so take it with a grain of salt. I like things to be simple and worry free. Comments made by the OP lead me to believe he feels the same way. I don't like nitrous/meth because you have be bothered with filling bottles and worrying about something failing. Meth works there is no doubt but at the end of the day a damn 550rwhp car setup correctly just doesn't need it.
Last edited by oscs; Jan 29, 2014 at 09:59 AM.
TECH Fanatic
Joined: Mar 2011
Posts: 1,916
Likes: 8
From: Statesville, NC
NO I HAVE NOT see I can type in caps too.. Guess why? Because (again) in MY opinion sub 600hp cars don't need it, ask me how I know.. I love how meth injection is a must have now a days.. You just can't have a safe FI motor without it if it where my money I'd spend it on a GOOD intercooler and a solid tuner.
Again this is my opinion so take it with a grain of salt. I like things to be simple and worry free. Comments made by the OP lead me to believe he feels the same way. I don't like nitrous/meth because you have be bothered with filling bottles and worrying about something failing. Meth works there is no doubt but at the end of the day a damn 550rwhp car setup correctly just doesn't need it.
if it where my money I'd spend it on a GOOD intercooler and a solid tuner. Again this is my opinion so take it with a grain of salt. I like things to be simple and worry free. Comments made by the OP lead me to believe he feels the same way. I don't like nitrous/meth because you have be bothered with filling bottles and worrying about something failing. Meth works there is no doubt but at the end of the day a damn 550rwhp car setup correctly just doesn't need it.
I agree that sub 600rwhp cars are fine without meth with a good tune. I was 520ish without meth for a while but when I decided to twist that little **** and pick up nearly 300 more rwhp I put twin nozzles on it and spray the crap out of it. That's why im hitting 21psi on a stock ls1 and its living.
Last edited by oscs; Jan 29, 2014 at 10:47 AM.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo I agree that sub 600rwhp cars are fine without meth with a good tune. I was 520ish without meth for a while but when I decided to twist that little **** and pick up nearly 300 more rwhp I put twin nozzles on it and spray the crap out of it. That's why im hitting 21psi on a stock ls1 and its living.
TECH Fanatic
Joined: Mar 2011
Posts: 1,916
Likes: 8
From: Statesville, NC
My iats are fine on street driving. Not been to track but once just on street tires on low boost. I have cheap ebay 4" thick intercooler.
TECH Fanatic
iTrader: (37)
Joined: May 2008
Posts: 1,034
Likes: 0
From: ocala,fl--- forest-ocklawaha
i made 650rwhp on pump gas, no meth , stock th400 and tq convertor, motor 5.3 ly5 , head bolts, mls gaskets, valve springs, ls3 cam , boost was 16-17psi .. Ran good for awhile . motor finally let go , but i think it was my error , couldnt get it to crank one time , messed with the fpr , and prob didnt set it back exactly to same psi .. #7 piston is complety gone ,, next time im goin meth injection ,, ive used it before , and love it .. kits are 250 bucks, next motor is ly6, tune it up to 10psi with no meth , anything beyound 10 psi , im cramming bunch of meth down its throat ..
TECH Fanatic
Joined: Mar 2011
Posts: 1,916
Likes: 8
From: Statesville, NC
I still have factory untouched rear and torque arm too. I know im crazy. Car weighs 3400 on the scales without me (175#) and half tank of fuel and 3 gallons of methanol onboard. That was with the factory wheels and tires. Now full drag setup.
Me personally, I want as much power as I can make per pound of boost. If my IAT's go above 104F my tune is pulling timing. Since without meth my IAT's get in the 180F range at the top of 4th, it makes sense for me to run meth and maximize my timing. Was my tune safe before meth? Yes it was. Am I making more power now? You bet.
TECH Fanatic
Joined: Mar 2011
Posts: 1,916
Likes: 8
From: Statesville, NC
Bottom line is we horsepower nuts are never satisfied. I was satisfied with a goal of 530 rwhp when I started. Same build turned into near 900rwhp and even though im right at grenading engine, trans, rear, etc because all are still stock I still want more. Trust me in the end, you'll always want more. Just get ready, open your wallet, and never close it lol.
Me personally, I want as much power as I can make per pound of boost. If my IAT's go above 104F my tune is pulling timing. Since without meth my IAT's get in the 180F range at the top of 4th, it makes sense for me to run meth and maximize my timing. Was my tune safe before meth? Yes it was. Am I making more power now? You bet.
I completely agree with this statement and honestly when my 900rwhp TT build is done I will probably run meth at some point because it will be needed. My argument is at the very basic level which is the simple fact that this guy can easily get away with 550hp without having to bother with a meth injection system. Proper tuning and a quality intercooler can get him there.
What was your rwhp number before meth and after? also how many degrees are you able to obtain while spraying?
I was at 630rwhp without meth and 11* of timing. Added meth and went to 15* of timing and 700rwhp. Bumped timing to 18* and did 754rwhp with E85 and meth. I'm back on 91 octane now and more boost. 13.5psi and I'm only running 10* of timing until my second meth nozzle shows up. Then I will start leaning on it more.
Wow, I see there's lots of anger in here... let's all step back and take a breather for a second....
I firmly believe in the benefits of not only running meth injection, but water/meth injection for a few reasons, especially on a stock motor. First, you need to inject less to have the same positive effects of cooling and detonation resistance. Sure, meth cools the IAT sensor quickly, but the air temperature isn't what is most detrimental to a motor, it's combustion temperatures. The beauty of mixing water in with the meth injection is it doesn't instantly burn off in the combustion cylinder, so it helps pull out more heat than meth does. As the water turns to vapor, it actually raises cylinder pressure as well, and lowers your egt's and helps to pull any carbon deposits out of your entire engine track from intake manifold to the exhaust.
Even at 550hp, I think it's beneficial. Might not be absolutely necessary, but it helps, and let's be honest, how long do we think he's going to stay at 550hp? I give it 2-3 months max before he decides to try some more boost psi.
I firmly believe in the benefits of not only running meth injection, but water/meth injection for a few reasons, especially on a stock motor. First, you need to inject less to have the same positive effects of cooling and detonation resistance. Sure, meth cools the IAT sensor quickly, but the air temperature isn't what is most detrimental to a motor, it's combustion temperatures. The beauty of mixing water in with the meth injection is it doesn't instantly burn off in the combustion cylinder, so it helps pull out more heat than meth does. As the water turns to vapor, it actually raises cylinder pressure as well, and lowers your egt's and helps to pull any carbon deposits out of your entire engine track from intake manifold to the exhaust.
Even at 550hp, I think it's beneficial. Might not be absolutely necessary, but it helps, and let's be honest, how long do we think he's going to stay at 550hp? I give it 2-3 months max before he decides to try some more boost psi.
I'm running a bone stock LS1 except for valve springs and an oil pump upgrade, and I made 550 RWHP on a Mustang dyno at just under 7 psi and 93 octane. I have a meth kit on the car, but was having problems getting it to activate, so those numbers are without meth. 550 RWHP is a very easy and safe goal on pump gas! Good luck to ya!