Tuned on 50/50 want more meth

***Turbineguy*** · 10-18-2006, 10:33 AM

Doug tuned my car on 50/50 but I'm wondering if it would be harmful to adjust the ratio with a little more meth and a little less water since it's getting colder or would it even be worthwhile to do it at all. I know it can be an issue to lower the meth content but not sure about adding some.

snorky · 10-18-2006, 10:49 AM

it will enrich your a/f slightly. obviously depending on the meth:water ratio. i used to do this on track days on my evo. it raises the detontaiion threshold which is beneficial your turbo/engine/egt get hot.

***Turbineguy*** · 10-18-2006, 11:09 AM

So no issues and some benefit to going from 50/50 to say 70/30? Is there any noticable power increase or just more consistent. What did you change your ratio to at the track?

***VSGTS14*** · 10-18-2006, 11:11 AM

there is really no difference, the octane goes down like one.

***Turbineguy*** · 10-18-2006, 11:16 AM

Quote:

Originally Posted by VSGTS14

there is really no difference, the octane goes down like one.

I thought the octane would go up if more meth was added. Do I have it backwards? Either way one point isn't much i guess.

o0)FuNkTrAiN(0o · 10-18-2006, 11:50 AM

whats the freezing point of a 50/50 mixture? You might not have to do anything at all.

***Turbineguy*** · 10-18-2006, 11:55 AM

Quote:

Originally Posted by o0)FuNkTrAiN(0o

whats the freezing point of a 50/50 mixture? You might not have to do anything at all.

Not looking at it from a freezing standpoint. More of a power related question.

snorky · 10-18-2006, 01:46 PM

it's not that the octane will go up, it's that the det threshold, a:f will go up. i used 70:30

o0)FuNkTrAiN(0o · 10-19-2006, 07:16 AM

Quote:

Originally Posted by Turbineguy

a little more meth and a little less water since it's getting colder

sorry took that the wrong way, my bad

***Turbineguy*** · 10-19-2006, 07:45 AM

Quote:

Originally Posted by o0)FuNkTrAiN(0o

sorry took that the wrong way, my bad

No worries.

superhero06 · 10-19-2006, 08:15 AM

I was thinking the same thing. Im tuned for 50/50 and want to go to 70/30. If its real cold out will 50% water have a harder time atomizing???

Flycaster · 10-19-2006, 10:56 AM

According to what I've read, a 50-50 mix has a freezing point @ -50f. Thus, unless someone is in the middle of an Alaskan cold-wave I can't imagine that atomization is going to be much of a problem since meth and water are 100% miscible.

Insofar as tuning, my tuner has told me there isn't a whole lot more horsepower to be gained by pushing the meth component above 50% - certainly not enough to offest the additional risk of having a molotov ****tail in the trunk of your car. But, that's what I've heard, combined with my opinion - ymmv.

2fas4u · 10-19-2006, 12:19 PM

I think that is a fair statement until you go to 100 % meth at which point you will definately have to be re-tuned. I think your gains will need to come from somewhere else now...Time for a bigger snail and you can join us 500 Whp folks.....

***Turbineguy*** · 10-19-2006, 12:45 PM

I'm trying to decide between an FPred or green and which front mount to get. Green for good spool on the street or red for lots of ponies. Hmmmm. Just don't want to frag a piston or two. Or four. I'm leaning toward a Green with an APS 725 and Nismo injectors. APS inlet pipe too.

2fas4u · 10-20-2006, 05:03 AM

I think your very level headed about your goal. Also you have nothing to worry about piston wise. The injection is your added protection. There are plenty of us still running stock internals and will be for a long time (I hope...), my goal is to prove the nay sayers wrong!!!

10-18-2006, 10:33 AM	#1
*Turbineguy* Non-Reformed Meth Addict Car: '06 WRB Fav Mod: A laptop and tuning software. Location: Swampbilly Central Posts: 2,417 IWSTI Addict since: Feb 2006 Trader Rating: (8)	Tuned on 50/50 want more meth Doug tuned my car on 50/50 but I'm wondering if it would be harmful to adjust the ratio with a little more meth and a little less water since it's getting colder or would it even be worthwhile to do it at all. I know it can be an issue to lower the meth content but not sure about adding some. This ad is not endorsed by this member. Please register or login to hide this ad.

10-20-2006, 05:03 AM	#15
2fas4u Silver Member Car: 05 & 09 WRB STI Location: Manchester, Maryland Posts: 2,270 IWSTI Addict since: Aug 2005 Trader Rating: (4)	I think your very level headed about your goal. Also you have nothing to worry about piston wise. The injection is your added protection. There are plenty of us still running stock internals and will be for a long time (I hope...), my goal is to prove the nay sayers wrong!!! This ad is not endorsed by this member. Please register or login to hide this ad.

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10-18-2006, 10:49 AM	#2
snorky If in doubt, flat out Car: 32J GDFDYEH Fav Mod: Fullerton's Qrack on my car Location: Chicagoland Posts: 3,805 IWSTI Addict since: Apr 2006 Trader Rating: (23)	it will enrich your a/f slightly. obviously depending on the meth:water ratio. i used to do this on track days on my evo. it raises the detontaiion threshold which is beneficial your turbo/engine/egt get hot.

10-18-2006, 11:09 AM	#3
*Turbineguy* Non-Reformed Meth Addict Car: '06 WRB Fav Mod: A laptop and tuning software. Location: Swampbilly Central Posts: 2,417 IWSTI Addict since: Feb 2006 Trader Rating: (8)	So no issues and some benefit to going from 50/50 to say 70/30? Is there any noticable power increase or just more consistent. What did you change your ratio to at the track?

10-18-2006, 11:11 AM	#4
*VSGTS14* Muller Chevrolet Car: 08 Chevy 2500 Diesel Fav Mod: a new 09 STi Location: Milford, NJ Posts: 10,154 IWSTI Addict since: Oct 2004 Trader Rating: (11)	there is really no difference, the octane goes down like one.

10-18-2006, 11:50 AM	#6
o0)FuNkTrAiN(0o Junior STI Driver Car: 05 STi WRB Fav Mod: GC-06Hs & RE-01Rs Posts: 188 IWSTI Addict since: Aug 2005 Trader Rating: (0)	whats the freezing point of a 50/50 mixture? You might not have to do anything at all.

10-18-2006, 01:46 PM	#8
snorky If in doubt, flat out Car: 32J GDFDYEH Fav Mod: Fullerton's Qrack on my car Location: Chicagoland Posts: 3,805 IWSTI Addict since: Apr 2006 Trader Rating: (23)	it's not that the octane will go up, it's that the det threshold, a:f will go up. i used 70:30

10-19-2006, 08:15 AM	#11
superhero06 Grassroots STI Racer Car: MY06 Fav Mod: Valentine-1 Location: Sioux Falls, SD Posts: 562 IWSTI Addict since: Jun 2006 Trader Rating: (0)	I was thinking the same thing. Im tuned for 50/50 and want to go to 70/30. If its real cold out will 50% water have a harder time atomizing???

10-19-2006, 10:56 AM	#12
Flycaster S204 Racer Posts: 3,040 IWSTI Addict since: Apr 2004 Trader Rating: (0)	According to what I've read, a 50-50 mix has a freezing point @ -50f. Thus, unless someone is in the middle of an Alaskan cold-wave I can't imagine that atomization is going to be much of a problem since meth and water are 100% miscible. Insofar as tuning, my tuner has told me there isn't a whole lot more horsepower to be gained by pushing the meth component above 50% - certainly not enough to offest the additional risk of having a molotov ****tail in the trunk of your car. But, that's what I've heard, combined with my opinion - ymmv.

10-19-2006, 12:19 PM	#13
2fas4u Silver Member Car: 05 & 09 WRB STI Location: Manchester, Maryland Posts: 2,270 IWSTI Addict since: Aug 2005 Trader Rating: (4)	I think that is a fair statement until you go to 100 % meth at which point you will definately have to be re-tuned. I think your gains will need to come from somewhere else now...Time for a bigger snail and you can join us 500 Whp folks.....

10-19-2006, 12:45 PM	#14
*Turbineguy* Non-Reformed Meth Addict Car: '06 WRB Fav Mod: A laptop and tuning software. Location: Swampbilly Central Posts: 2,417 IWSTI Addict since: Feb 2006 Trader Rating: (8)	I'm trying to decide between an FPred or green and which front mount to get. Green for good spool on the street or red for lots of ponies. Hmmmm. Just don't want to frag a piston or two. Or four. I'm leaning toward a Green with an APS 725 and Nismo injectors. APS inlet pipe too.