Meth vs Nitrous for FI
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From: Summerville, SC
Meth vs Nitrous for FI I think we all know the benefits of using meth and what has to be done as far as tuning when using meth. But my question is, since the nitrous can be had for a cheaper price, what needs to be done as far as tuning, ie afr, timing, boost? Also, where would be the best place for nozzle location?
Those 2 things have completely different effects as far as I know. The meth is like adding a higher octane to deter detonation under boost. Nitrous does not do this. Hence why people run stand alone fuel cells with race gas for when they spray or run a little higher octane in tank when spraying nitrous. And as far as I know everyone suggests tuning without the meth as well. Then sprayin the meth on top if needed. Only time I have seens cars tuned with meth is for basically race only applications. Or at least thats what I have found to be suggested.
So I'm a little confused about your meth tuning comments. Now I have heard of nitrous being used to help turbo spooling in certain applications. But I do not believe it is possible to use nitrous in place of meth since they do not serve the same purpose.
So I'm a little confused about your meth tuning comments. Now I have heard of nitrous being used to help turbo spooling in certain applications. But I do not believe it is possible to use nitrous in place of meth since they do not serve the same purpose.
I sprayed a 50 shot into mine, didnt need to do a thing different to the tune. When it was a wet shot it fouled the plugs out. So I just diconnected the fuel solenoid and left it. Nozzle is right after the TB in the intake plenum. Seems to work fine.
OP, correct me if I mis-read what you were asking.
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From: Summerville, SC
Those 2 things have completely different effects as far as I know. The meth is like adding a higher octane to deter detonation under boost. Nitrous does not do this. Hence why people run stand alone fuel cells with race gas for when they spray or run a little higher octane in tank when spraying nitrous. And as far as I know everyone suggests tuning without the meth as well. Then sprayin the meth on top if needed. Only time I have seens cars tuned with meth is for basically race only applications. Or at least thats what I have found to be suggested.
So I'm a little confused about your meth tuning comments. Now I have heard of nitrous being used to help turbo spooling in certain applications. But I do not believe it is possible to use nitrous in place of meth since they do not serve the same purpose.
So I'm a little confused about your meth tuning comments. Now I have heard of nitrous being used to help turbo spooling in certain applications. But I do not believe it is possible to use nitrous in place of meth since they do not serve the same purpose.
My concern is for when spraying, what is the target afr and timing suggestions.
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From: Summerville, SC
So your basically using a dry shot, do you have a maf? What gain did you see with the 50 shot? What afr and timing are you running with the 50 shot?
15psi boost
w/o nitrous 10.5x's @ 128
w/ 50 shot 10.30's @ 131
My converter is a TCI streetfighter 4000 stall rebuilt by Coan. They told me to not even bother putting it back it cause it will never hold up. Hughes built me one and I had problems and sent it back so I threw the TCI back in. It works ok but im sure its losing some.
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I think we all know the benefits of using meth and what has to be done as far as tuning when using meth. But my question is, since the nitrous can be had for a cheaper price, what needs to be done as far as tuning, ie afr, timing, boost? Also, where would be the best place for nozzle location?
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Thread Starter
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From: Summerville, SC
I was referring to buying the system used or new for that matter. I can get a bottle filled for less than 20 bucks since my uncle owns a refilling station.
Ok, I'm on the same page now I think. Your weighing options between meth w/more boost or just adding a nitrous kit right? The way it was worded in the OP confused me a little.
I'd say actually in the long run meth would be the better option. Especially with a turbo where you can run a boost controller & change boost levels whenever you want to take advantage of the meth. Depending on how hard you push it while running the meth will determine how much is used. Like Trust said, a full tank of meth up front can last a while & a 5 gallon container could last you months. I think you'd run through more nitrous than meth honestly & eventually the nitrous would end up costing more to keep on hand than the meth.
But thats just my opinion.
I'd say actually in the long run meth would be the better option. Especially with a turbo where you can run a boost controller & change boost levels whenever you want to take advantage of the meth. Depending on how hard you push it while running the meth will determine how much is used. Like Trust said, a full tank of meth up front can last a while & a 5 gallon container could last you months. I think you'd run through more nitrous than meth honestly & eventually the nitrous would end up costing more to keep on hand than the meth.
But thats just my opinion.
How long does $40 dollars of n2o last and how long does $40 dollars of Meth last. Meth is cheaper. A bottle would last me 4-8 passes, 5 gallons of meth has lasted me around 8 months.
Meth is much cheaper than nitrous. You can also run washer fluid or mix meth as stated which to be alot less than nitrous.
Also driving around with a nitrous bottle in your car can be dangerous if it gets to hot and exceeds pressure ratings.
Also driving around with a nitrous bottle in your car can be dangerous if it gets to hot and exceeds pressure ratings.
Thread Starter
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From: Summerville, SC
Good point. I was thinking initial cost not really long term which was stupid of me. Even though I get the discount, I don't see it being a viable option now.
8 sec potential, 12 sec slip
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Apples vs oranges buddy.. Meth increases octane, and adds fuel which decreases detonation. Nitrous leans out the mixture and effectively increases detonation possibility. The only thing that they have in common is they both bring IATs down. A meth kit is not at all a big initial hit. You can get a very complete and comprehensive brand new kit for $500-600. Whats a new nitrous kit cost again? I average 1 gallon of meth every 1000 miles. I just filled up my 5 gallon reserve for $18 a couple weeks ago. That will most likely last me a year. Meth FTW IMO
5.3L 8.6:1 comp. 11.4-11.6: AFR. Timing set at 19* No MAF.
15psi boost
w/o nitrous 10.5x's @ 128
w/ 50 shot 10.30's @ 131
My converter is a TCI streetfighter 4000 stall rebuilt by Coan. They told me to not even bother putting it back it cause it will never hold up. Hughes built me one and I had problems and sent it back so I threw the TCI back in. It works ok but im sure its losing some.
15psi boost
w/o nitrous 10.5x's @ 128
w/ 50 shot 10.30's @ 131
My converter is a TCI streetfighter 4000 stall rebuilt by Coan. They told me to not even bother putting it back it cause it will never hold up. Hughes built me one and I had problems and sent it back so I threw the TCI back in. It works ok but im sure its losing some.
