Higher octane on higher boost !?
- Thread starter Wingman21
- Start date
Evo block is the same engine that was used in the GSX eclipses and similar models i know this for sure from guys that have them and go to teh same mechanic the only difference is the engine is set up backwards so to say in the EVO. BLock is same engine code even tho "it has different baffles etc for oil" and you can make a DSM GSX have the same exact engine by getting it machined to have the same oil flow type pattern as the EVO. I have a friend that paid to have it done. He's a mittsubishi guru, i think i explained that right...he was trying to explain the easiest way he knew how, but however....neon is a totally diff engine.
pip7441622
Member
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- Mazdaspeed Protege
Even when I first got the car I always put 93 octane in it. Never any lower. That and the colder plugs are the cheapest safe-gaurds that you should get when upping the boost. Its a no-brainer.
They would have to take them out to be able to tell. Also I dont think you would have to worry about it. I don't know your dealer would have to be pretty anal to think that different plugs meant increased boost. You have to change plugs every so often anyways.
jersey_emt
Member
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- 04 MSM #1089
I doubt they would even check the numbers on the plugs, and if they do say anything, just tell them those are the plugs given to you by Pep Boys/Autozone/whatever.
They can't say that because you have colder plugs you upped the boost.
They can't say that because you have colder plugs you upped the boost.
DiscreetSpeed
Member
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- 03 MSP
theyve got to be the dumbest uptight muthafuggas if they voidWingman21 said:
spacemonkey
Member
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- Mazdaslow
I assume you ment Chrysler and mitsu partnership. No the SRT-4 is not the same engine as the EVO 4g63.Notorious_V.I.C said:
SRT-4 = Turbo 2.4L PT Cruiser Engine
4g63 (EVO) = EVO engine and same one found on older eclispe and older mitsu 4 bangers
They are not the same engine...repeat are not the same. I think what you mean is alot of technology was shared between the 2 companies. Mitsubishi designed the exhaust manifold and tubo of the SRT-4 engine. PVO (SRT) did the internals. That does not make it the same engine as the EVO. They are not the same engine...just cuz the SRT-4 has mitsubishi parts. ones 2.0L and the other is 2.4L. But bothe engines are very strong.
kNOWfREED0m
Member
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- MSP
mitshu made the neons turbo
NeverSober
WTFPWN3D
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- 06 wrx
I was running 9 psi with the stock plugs on 93 octane. Gbourdon and I took my plugs out this weekend and they were a little black and had a little little bit of white on them. I never had a problem but I am running colder plugs now.
Chris
Chris
Wingman:
Normal plugs look brown to grayish tan color and the electrode will show a slight wear.
A blistered white insulator, eroded electrode and no deposits indicates a plug thats too hot.
Dry sooty deposits indicate a rich mixture or weak ignition.
If the insulator has a yellowish glazed appearance, your plug has suffered high speed glazing under hard acceleration. A colder plug can fix this.
Look for obvious signs of a problem....heavy oil deposits, worn electrodes, heavy carbon, cracked or chipped insulators, etc.
I am running the stock plugs and more boost and have not had any problems. I do not plan on running a colder plug. Just make sure you keep fresh ones in there.
Normal plugs look brown to grayish tan color and the electrode will show a slight wear.
A blistered white insulator, eroded electrode and no deposits indicates a plug thats too hot.
Dry sooty deposits indicate a rich mixture or weak ignition.
If the insulator has a yellowish glazed appearance, your plug has suffered high speed glazing under hard acceleration. A colder plug can fix this.
Look for obvious signs of a problem....heavy oil deposits, worn electrodes, heavy carbon, cracked or chipped insulators, etc.
I am running the stock plugs and more boost and have not had any problems. I do not plan on running a colder plug. Just make sure you keep fresh ones in there.
Notorious_V.I.C
Member
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- 2003.5 MSP
i found 93 once, can't seem to remember were it is now
or maybe i should get off the crack (stoned)
j/k
or maybe i should get off the crack (stoned)
j/k
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Installshield 2
Gothenburg Superiority
The controversy behind Octane is as misleading as things can get...No two seperate engines with similar boost will have the same octane requirements...But don't look at it that way...Octane is generally simply a chemical that allows gasoline to behave differently in combustion...It basically creates a higher detonation threshold by helping to "buffer" and control the expanding mixture...SRT 4 engines have different static compression ratio's...run different quench area dynamics...and are pushing radically different amounts of air through by different turbo's...The tuning, which is the most important part out of all of this, is also different...
My guess also is the cooling benefits created by Dogde's oil squirter routing too...It can be said to run cooler under boost most likely than our dinosaur...which will allow it to run higher boost safely with a lesser octane'd fuel...
And to beat the dead horse a little more...The SRT 4 uses a brand new 2.4L mill, that also sits in the PT Turbo GT models...The EVO uses the 14+ year old mitsu designed 4G63, that still kicks more than adequate ass...Nothing is interchangeable, and they are completely different...
EDIT: didn't realize there were 3 pages of s*** here...thought there was only one...Someone else pointed out the SRT-4's intercooler, and that thing compared to the MSP's cereal box also plays a big part in detonation prevention...Someone also said that Octane numbers describe the amount gasoline can be compressed before it ignites on its own...Not exactly..The numbers simply represent the concentration of actual unbroken octane chains in the gas per volume...Octane itself does not exactly lower a flash point of gasoline, which is what would be needed for it to be compressed more before igniting...But it does help prevent unwanted combustion (through excess heat) by making the ignition properties of the said gas more stable...meaning the heat associated with squeezing the mixture tighter are less likely to make it burst without a spark output from the plug...So in the end you are right...Just tried to clarify it a little if anyone was interested...
My guess also is the cooling benefits created by Dogde's oil squirter routing too...It can be said to run cooler under boost most likely than our dinosaur...which will allow it to run higher boost safely with a lesser octane'd fuel...
And to beat the dead horse a little more...The SRT 4 uses a brand new 2.4L mill, that also sits in the PT Turbo GT models...The EVO uses the 14+ year old mitsu designed 4G63, that still kicks more than adequate ass...Nothing is interchangeable, and they are completely different...
EDIT: didn't realize there were 3 pages of s*** here...thought there was only one...Someone else pointed out the SRT-4's intercooler, and that thing compared to the MSP's cereal box also plays a big part in detonation prevention...Someone also said that Octane numbers describe the amount gasoline can be compressed before it ignites on its own...Not exactly..The numbers simply represent the concentration of actual unbroken octane chains in the gas per volume...Octane itself does not exactly lower a flash point of gasoline, which is what would be needed for it to be compressed more before igniting...But it does help prevent unwanted combustion (through excess heat) by making the ignition properties of the said gas more stable...meaning the heat associated with squeezing the mixture tighter are less likely to make it burst without a spark output from the plug...So in the end you are right...Just tried to clarify it a little if anyone was interested...
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Notorious_V.I.C
Member
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- 2003.5 MSP
What if u can't get 93 octane? but everything else unless i can't find the place i got 93..i'll have to go with 91
I may be wrong but i thought the higher the octane the less combustable it is to lower octane......I thought that in itself does infact lower the flash point. I read this huge article my friend showed me in this turbo book he has. He explained that it won't ignite without having a spark to it, *as fast* as a lower octane gas would under the same environment. Thats why it won't detonate as easily. i dunno, just trying to learn more here.
