What octane to put in my stock JDM GSR motor?
Joined: Sep 2002
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From: SoCal., usa
Re: What octane to put in my stock JDM GSR motor? (xavior66)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xavior66 »</TD></TR><TR><TD CLASS="quote">Premium octane (91 or higher).</TD></TR></TABLE>
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Honda-Tech Member
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From: Honda city, MN, USA
Re: (The Muffin Man)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The Muffin Man »</TD></TR><TR><TD CLASS="quote">Just a question: why such high octane for a stock motor that isn't boosted?</TD></TR></TABLE>
higher octane = more and better performance!!
but with the gasoline price these days, I'll settle for 89 points
higher octane = more and better performance!!
but with the gasoline price these days, I'll settle for 89 points
Honda-Tech Member
Joined: Jan 2002
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From: On., Can.
Re: (The Muffin Man)
Is the compression ratio. Usually anything around 9.6:1 and up, you'll need the premuim to get the performance out of it. Otherwise the ecu dials back the timing and you'll lose the benefits of the higher compression.
They say 91 octane is good up to 10.8:1 cr.
Don't put lower octane in if you don't have a knock sensor hooked up.
d
They say 91 octane is good up to 10.8:1 cr.
Don't put lower octane in if you don't have a knock sensor hooked up.
d
Solbros Owns Me
Joined: Jun 2002
Posts: 14,462
Likes: 6
From: Vancouver, WA, USA
Re: (GERM)
you guys think the higher the octane the better the performance......
Man, when I was running a B16 with a milled head a few months ago, I was running 89 octane w3rd. If it wasn't pinging, I was happy.
Lower octane= burns easier= more power AS LONG AS ITS NOT DETONATING
RUn the lowest octane possible unless you have a crazy maps which force you to run a higher octane...ignition, etc
Man, when I was running a B16 with a milled head a few months ago, I was running 89 octane w3rd. If it wasn't pinging, I was happy.
Lower octane= burns easier= more power AS LONG AS ITS NOT DETONATING
RUn the lowest octane possible unless you have a crazy maps which force you to run a higher octane...ignition, etc
Honda-Tech Member
Joined: Oct 2003
Posts: 4,012
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From: Roanoke A.K.A. Redneckville,VA
Re: (HATCHingMN)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HATCHingMN »</TD></TR><TR><TD CLASS="quote">
higher octane = more and better performance!!
</TD></TR></TABLE>
not necesarily.you only need the lowest octane your car can run on without detonating.all other things being equal,the higher the octane,the more resistant to combustion the fuel is.usually a higher octane fuel has a slightly slower burn,and can produce a little less power than a lower octane fuel.
i've seen numerous dyno plots of RC51s comparing the power outputs when used with 9x(whatever premium is in the area),89 and 87 octane fuel.the lower octanes produced slightly more power because the RC simply didn't need the detonation resiatnce of the higher octane fuel.what was really interesting was the loss in power using 100+ octane fuels.i love seeing people at the track,or even on the street running race gas on a basically stock motor
chris
higher octane = more and better performance!!
</TD></TR></TABLE>
not necesarily.you only need the lowest octane your car can run on without detonating.all other things being equal,the higher the octane,the more resistant to combustion the fuel is.usually a higher octane fuel has a slightly slower burn,and can produce a little less power than a lower octane fuel.
i've seen numerous dyno plots of RC51s comparing the power outputs when used with 9x(whatever premium is in the area),89 and 87 octane fuel.the lower octanes produced slightly more power because the RC simply didn't need the detonation resiatnce of the higher octane fuel.what was really interesting was the loss in power using 100+ octane fuels.i love seeing people at the track,or even on the street running race gas on a basically stock motor
chris
Joined: Dec 2003
Posts: 355
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From: Stuck in the Catskills, NY, United States
Re: (TeamNextGenChris)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TeamNextGenChris »</TD></TR><TR><TD CLASS="quote">
not necesarily.you only need the lowest octane your car can run on without detonating.all other things being equal,the higher the octane,the more resistant to combustion the fuel is.usually a higher octane fuel has a slightly slower burn,and can produce a little less power than a lower octane fuel.
i've seen numerous dyno plots of RC51s comparing the power outputs when used with 9x(whatever premium is in the area),89 and 87 octane fuel.the lower octanes produced slightly more power because the RC simply didn't need the detonation resiatnce of the higher octane fuel.what was really interesting was the loss in power using 100+ octane fuels.i love seeing people at the track,or even on the street running race gas on a basically stock motor
chris</TD></TR></TABLE>
This is what I was thinking when everyone chimed in with "91 octane." Thought you guys might know something I don't. Essentially, you want to run the lowest octane you can get away with, and higher octane can rob you of power if your compression isn't high enough (ie: stock)
not necesarily.you only need the lowest octane your car can run on without detonating.all other things being equal,the higher the octane,the more resistant to combustion the fuel is.usually a higher octane fuel has a slightly slower burn,and can produce a little less power than a lower octane fuel.
i've seen numerous dyno plots of RC51s comparing the power outputs when used with 9x(whatever premium is in the area),89 and 87 octane fuel.the lower octanes produced slightly more power because the RC simply didn't need the detonation resiatnce of the higher octane fuel.what was really interesting was the loss in power using 100+ octane fuels.i love seeing people at the track,or even on the street running race gas on a basically stock motor
chris</TD></TR></TABLE>
This is what I was thinking when everyone chimed in with "91 octane." Thought you guys might know something I don't. Essentially, you want to run the lowest octane you can get away with, and higher octane can rob you of power if your compression isn't high enough (ie: stock)
Member
Joined: Mar 2002
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From: NJ, USA
Re: (Emerika)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Emerika »</TD></TR><TR><TD CLASS="quote">nice post </TD></TR></TABLE>
Indeed.
Bottom line, follow Honda's recommendation. As mentioned for high compression B series motors, premium fuel is recommended. They even post "premium fuel only" on the back of the gas door.
</TD></TR></TABLE>Indeed.
Bottom line, follow Honda's recommendation. As mentioned for high compression B series motors, premium fuel is recommended. They even post "premium fuel only" on the back of the gas door.
Multi-paradigm
Joined: Nov 2003
Posts: 3,476
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From: San Diego, CA
Re: (HATCHingMN)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HATCHingMN »</TD></TR><TR><TD CLASS="quote">
higher octane = more and better performance!!
</TD></TR></TABLE>
I hope that's sarcastic.
The myth that the "highest octane possible" makes your motor run smoother or quicker or faster or more powerful is just that; A myth. You should never put anything gas that is higher in octane than is necessary.
High-CR B-series motors (along with any high-CR motor) requires higher (not HIGHEST) octane gas such as 91/93, etc because of all the heat resulting from the high-CR. Obviously, higher-octane gas burns more slowly, allowing a tuner to control ignition timing to be more precise and stable. If you run, let's say 101-octane in a stock GSR motor (10:1 CR or something?), the fuel isn't burning fast enough and its leaving deposits in all kinds of nasty places. Unburnt fuel causes emissions failures as per o2 sensors and the catalytic converter. Plus it's just a waste of money and fuel and ozone layer.
On the other hand, too low of octane gas in a high comrpession motor (i.e. 12+:1 CR > 87 Octane) will burn too fast as a result of the high temperatures of the high-CR chambers. So obviously that causes shiat like engine knock/ping/early detonation, loss of power eventually, and excessive engine wear.
Having the CORRECT octane-rated gas in your motor results in an optimal combination of combustion power and engine and emission safety.
Follow the manufacturer recommendation for fuel use. And as all-motor or turbo upgrades are implemented into the motor, increase octane accordingly.
If your GSR motor is stock...run 91 Octane.
**** it. Dunno what I'm talking about.
Run Ethanol in that biatch.
higher octane = more and better performance!!
</TD></TR></TABLE>
I hope that's sarcastic.
The myth that the "highest octane possible" makes your motor run smoother or quicker or faster or more powerful is just that; A myth. You should never put anything gas that is higher in octane than is necessary.
High-CR B-series motors (along with any high-CR motor) requires higher (not HIGHEST) octane gas such as 91/93, etc because of all the heat resulting from the high-CR. Obviously, higher-octane gas burns more slowly, allowing a tuner to control ignition timing to be more precise and stable. If you run, let's say 101-octane in a stock GSR motor (10:1 CR or something?), the fuel isn't burning fast enough and its leaving deposits in all kinds of nasty places. Unburnt fuel causes emissions failures as per o2 sensors and the catalytic converter. Plus it's just a waste of money and fuel and ozone layer.
On the other hand, too low of octane gas in a high comrpession motor (i.e. 12+:1 CR > 87 Octane) will burn too fast as a result of the high temperatures of the high-CR chambers. So obviously that causes shiat like engine knock/ping/early detonation, loss of power eventually, and excessive engine wear.
Having the CORRECT octane-rated gas in your motor results in an optimal combination of combustion power and engine and emission safety.
Follow the manufacturer recommendation for fuel use. And as all-motor or turbo upgrades are implemented into the motor, increase octane accordingly.
If your GSR motor is stock...run 91 Octane.
**** it. Dunno what I'm talking about.
Run Ethanol in that biatch.
