race fuel in my 06 si ?
03-08-2006, 03:07 AM
#4
Re: race fuel in my 06 si ? (spoonlongblock)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spoonlongblock »</TD></TR><TR><TD CLASS="quote">get ready to put up some serious cash</TD></TR></TABLE>
Haha. I remember one time I was at Laguna Seca and they had 113 octane for like $1.13
Heaven...
Haha. I remember one time I was at Laguna Seca and they had 113 octane for like $1.13
Heaven...
03-08-2006, 04:14 AM
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Re: race fuel in my 06 si ? (06sinow2)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 06sinow2 »</TD></TR><TR><TD CLASS="quote">goin to the track, what do u guys think about using race fuel in my 06 si...109octane? </TD></TR></TABLE>
Make sure that it's unleaded, street car approved fuel.
If it is, and you don't mind paying the frequently exorbitant trackside price, you'll be fine but you might not notice any increase in power.
The 2006 Accord 6-6 will pick up 9-10 wheel HP because the computer advances the spark curve and alters the fuel map to take advantage of 93 octane fuel (the car is sold for 87 octane). If the 2006 Civic Si computer also responds to high octane fuel, you might notice a little more power in some situations.
Here's the problem, though: It can take several full tanks of gas for the computer to fully realise the improvements. And it takes only <u>one</u> fill of low octane fuel to reset the computer.
The USDM K20A3 computer was also rumoured to respond to 93 octane vs 87 octane in the same way as the Accord computer. I never tested this on the K20A3, however. I have seen dyno numbers that appear to verify it.
Make sure that it's unleaded, street car approved fuel.
If it is, and you don't mind paying the frequently exorbitant trackside price, you'll be fine but you might not notice any increase in power.
The 2006 Accord 6-6 will pick up 9-10 wheel HP because the computer advances the spark curve and alters the fuel map to take advantage of 93 octane fuel (the car is sold for 87 octane). If the 2006 Civic Si computer also responds to high octane fuel, you might notice a little more power in some situations.
Here's the problem, though: It can take several full tanks of gas for the computer to fully realise the improvements. And it takes only <u>one</u> fill of low octane fuel to reset the computer.
The USDM K20A3 computer was also rumoured to respond to 93 octane vs 87 octane in the same way as the Accord computer. I never tested this on the K20A3, however. I have seen dyno numbers that appear to verify it.
03-08-2006, 06:03 AM
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Re: race fuel in my 06 si ? (George Knighton)
Just wondering.... how would that work with the 06 Si as the k20z3 already requires 91 octane correct? I take it 93+ would possibly offer an even greater increase than 91 as it can advance timing even more?
Not too get too far off track but I assume this is only the K-series motors and newer (dont know what series is in the Accord 6-6) and that this is only possible because of the VTC of the i-VTEC motors?
Sorry for going off topic.... this is my first time hearing of this and I am curious.
Not too get too far off track but I assume this is only the K-series motors and newer (dont know what series is in the Accord 6-6) and that this is only possible because of the VTC of the i-VTEC motors?
Sorry for going off topic.... this is my first time hearing of this and I am curious.
03-08-2006, 06:29 AM
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Re: race fuel in my 06 si ? (Slow EJ8)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slow EJ8 »</TD></TR><TR><TD CLASS="quote">Just wondering.... how would that work with the 06 Si as the k20z3 already requires 91 octane correct? I take it 93+ would possibly offer an even greater increase than 91 as it can advance timing even more?
Not too get too far off track but I assume this is only the K-series motors and newer (dont know what series is in the Accord 6-6) and that this is only possible because of the VTC of the i-VTEC motors?</TD></TR></TABLE>
I am only aware of two cases where people have documented an increase in power as a result of constantly using higher octane.
The only motors I'm aware of that have shown an increase in power from using 93 octane as opposed to the minimum recommended 87 octane are the K20A3 and the J30 in its 87 octane releases. The J30 sees an increase big enough that many drivers would probably constantly use 93 octane if they could get it.
Interestingly, a buddy and I both bought 2006 Accord 6-6's at the same time, both made in 11/05. The only difference between the two cars are that mine is a six speed coupe and his is a six speed sedan, less than a 50 pound weight difference between the two.
I use 93 octane exclusively and he uses 87 octane. I consistently get 2-5 miles per gallon better fuel economy than he does, and neither of us is especially easy on the go pedal.
You speculated that the computer's ability to get more horsepower out of high octane had something to do with i-VTEC; however, the J30 motors do not use variable valve timing.
Since the DC5 K20Z3 and the FG2 K20Z3 are already released and tuned for premium fuel, I would venture to speculate that these motors would not see a whole lot of increase from moving up a couple of octane.
Not too get too far off track but I assume this is only the K-series motors and newer (dont know what series is in the Accord 6-6) and that this is only possible because of the VTC of the i-VTEC motors?</TD></TR></TABLE>
I am only aware of two cases where people have documented an increase in power as a result of constantly using higher octane.
The only motors I'm aware of that have shown an increase in power from using 93 octane as opposed to the minimum recommended 87 octane are the K20A3 and the J30 in its 87 octane releases. The J30 sees an increase big enough that many drivers would probably constantly use 93 octane if they could get it.
Interestingly, a buddy and I both bought 2006 Accord 6-6's at the same time, both made in 11/05. The only difference between the two cars are that mine is a six speed coupe and his is a six speed sedan, less than a 50 pound weight difference between the two.
I use 93 octane exclusively and he uses 87 octane. I consistently get 2-5 miles per gallon better fuel economy than he does, and neither of us is especially easy on the go pedal.
You speculated that the computer's ability to get more horsepower out of high octane had something to do with i-VTEC; however, the J30 motors do not use variable valve timing.
Since the DC5 K20Z3 and the FG2 K20Z3 are already released and tuned for premium fuel, I would venture to speculate that these motors would not see a whole lot of increase from moving up a couple of octane.
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03-08-2006, 06:43 AM
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Re: race fuel in my 06 si ? (06sinow2)
Im sure it would be ok. But, most race fuels like CAM-2, and VP Racing fuels are leaded. From what I understand leaded fuel will clog up your O2 sensors.
03-08-2006, 07:34 AM
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Re: race fuel in my 06 si ? (George Knighton)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by George Knighton »</TD></TR><TR><TD CLASS="quote">You speculated that the computer's ability to get more horsepower out of high octane had something to do with i-VTEC; however, the J30 motors do not use variable valve timing.</TD></TR></TABLE>
Thats interesting, I was unaware that the Accord still used the traditional VTEC system as opposed to i-VTEC so like you pointed out there goes my theory out the window.
Thats interesting, I was unaware that the Accord still used the traditional VTEC system as opposed to i-VTEC so like you pointed out there goes my theory out the window.
03-09-2006, 02:00 AM
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Re: race fuel in my 06 si ? (eMpAtHy)
regardless... i went ahead with the 105 octane(unleaded) and timed my car @ lacr in palmdale and my best time was 15.1 , with the sea level correction it would have been a 14.6... i still think i could have broken into 14s because by the end of the night i had barely got the hang of my launch. was trying to get it to grab at about 6k but it either grabed too low and laged or it spun the wheels. got about 5 runs in.
03-09-2006, 03:17 AM
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Re: race fuel in my 06 si ? (06sinow2)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 06sinow2 »</TD></TR><TR><TD CLASS="quote">regardless... i went ahead with the 105 octane(unleaded) and timed my car @ lacr in palmdale and my best time was 15.1 , with the sea level correction it would have been a 14.6...</TD></TR></TABLE>
That's not so bad.
For the computer to take advantage of any increase in octane (if it <u>can</u> take advantage of it), it would take several tanks full.
That's not so bad.
For the computer to take advantage of any increase in octane (if it <u>can</u> take advantage of it), it would take several tanks full.
03-09-2006, 08:35 AM
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I doubt the computer will take advatange of 100 octane.. it is just a waste of money, and the un burned fuel might cause carbon build up in your engine I would only run fuel your car is tuned for..
I have seen guys with turbos put in 100 octane so they can up the boost and not worry about the computer pulling timing..
I have seen guys with turbos put in 100 octane so they can up the boost and not worry about the computer pulling timing..
03-15-2006, 01:49 PM
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Re: race fuel in my 06 si ? (George Knighton)
Any fuel with 105 octane or above is usually going to be leaded, which may render your cat and o2 sensors useless in a very short time. Also, fuel with an octane that high actually burns very slowly and not only will you not see in an increase in power you may actually see a decrease. There is absolutely no reason to use race fuel in a factory honda civic.....
03-16-2006, 04:15 AM
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Re: race fuel in my 06 si ? (d16dcoe45)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by d16dcoe45 »</TD></TR><TR><TD CLASS="quote">Any fuel with 105 octane or above is usually going to be leaded, which may render your cat and o2 sensors useless in a very short time. Also, fuel with an octane that high actually burns very slowly and not only will you not see in an increase in power you may actually see a decrease. There is absolutely no reason to use race fuel in a factory honda civic.....</TD></TR></TABLE>
Right on man, I have been preaching this for years, but people have more octane more power on the brain. The lower the octane the lower the flash point.
But like George stated, if the computer is advancing timing then you might have some incentive to use the higher octane fuel.
Right on man, I have been preaching this for years, but people have more octane more power on the brain. The lower the octane the lower the flash point.
But like George stated, if the computer is advancing timing then you might have some incentive to use the higher octane fuel.
03-16-2006, 05:34 AM
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Re: race fuel in my 06 si ? (Lynx Bus Type R)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lynx Bus Type R »</TD></TR><TR><TD CLASS="quote">Right on man, I have been preaching this for years, but people have more octane more power on the brain. The lower the octane the lower the flash point.</TD></TR></TABLE>
If you have a person that is happy to put race gas in their car they probably doesnt need it.. Its the person that bitches about race gas that needs it..
If you have a person that is happy to put race gas in their car they probably doesnt need it.. Its the person that bitches about race gas that needs it..
03-16-2006, 08:23 PM
#19
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I used some racing fuel a couple years ago when my CRX was supercharged, I mostly noticed it ran very cool during the hot Cali summer days while I used it.
03-17-2006, 06:02 AM
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Re: (CRX_1.8T)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX_1.8T »</TD></TR><TR><TD CLASS="quote">I used some racing fuel a couple years ago when my CRX was supercharged, I mostly noticed it ran very cool during the hot Cali summer days while I used it.</TD></TR></TABLE>
I ran GT104 in my boosted crx, but then again I detonated like crazy on 93 octane.. Unleaded race gas with toulene does have a great smell..
I ran GT104 in my boosted crx, but then again I detonated like crazy on 93 octane.. Unleaded race gas with toulene does have a great smell..
03-17-2006, 09:06 AM
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Re: (tgreaves)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves »</TD></TR><TR><TD CLASS="quote">Unleaded race gas with toulene does have a great smell.. </TD></TR></TABLE>
Heck yeah it does, I found myself opening the container a few times just to get a quick whif.
</TD></TR></TABLE>Heck yeah it does, I found myself opening the container a few times just to get a quick whif.
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