I've got a D16Y8 in my crx, just need to know what the min octane rating honda gives this engine.

Thanks,

Vince

 

87

you will loose performance if you run too high also... on that, assuming no boost, stock compression, no nitrous you should run a stage 6 plug ( one step colder ) and no higher than 89 octane. and no fancy plugs, stick to NGK.

 

yeah that's what i figured...i'm having a problem with a slight hesitation when i rev...throttle doesn't move for about .5 seconds. Just making sure it didn't need higher octane.

Thanks,
Vince

P.S. - anyone using a B16A throttle body on Y8 manifold. The bolts match up but the vaccum channels on the TB gasket surface are different and instead of a high idle vavle under the TB there is just a set of in/out coolant nipples...

Does this sound right? now do i make it work properly?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">you will loose performance if you run too high also</TD></TR></TABLE>

care to explain that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brooksto &raquo;</TD></TR><TR><TD CLASS="quote">

care to explain that?</TD></TR></TABLE>

Yea, id like to know that too...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brooksto &raquo;</TD></TR><TR><TD CLASS="quote">

care to explain that?</TD></TR></TABLE>

First off, do you know what a higher octane fuel does? If not, then that means you need to research, SEARCH being the key w3rd.

Believe and heed. Unless you are FI, High CR or a farrari, you really only need 87 or 89. 91-92 Can actually be harmful in the long run on your ****.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ARIZONA &raquo;</TD></TR><TR><TD CLASS="quote">First off, do you know what a higher octane fuel does?</TD></TR></TABLE>
Im no rocket scientist, but I believe the higher the octane, the better it resists preignition. Now again I ask you, what evidence do you have that a higher octane fuel on an engine that only requires a lower octane to avoid preignition causes a loss of performance? Now I am certainly not saying that a higher octane fuel ie 93 on my little civic that only needs 87 will give me any increased performance. I highly doubt that using 93 could have any detrimental effects, except to my wallet. Feel free to post any evidence supporting your point.

 

did the higher octane mean that since its harder to preignite, and less chance of detonation, then the point at which it burns ceanest is changed? then that would mean that the civic might not give sufficient burn to the gas, and then you would lose performance because youre not burning all the gas.

 

Use whatever fuel octane your car wants without making it knock. I use 87 with my Y7 with over 130k. It doesnt knock or ping and still gets me 35 mpg on the highway. Using 93 wont hurt the engine but it is more expensive that using 87.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brooksto &raquo;</TD></TR><TR><TD CLASS="quote">
Im no rocket scientist, but I believe the higher the octane, the better it resists preignition. Now again I ask you, what evidence do you have that a higher octane fuel on an engine that only requires a lower octane to avoid preignition causes a loss of performance? Now I am certainly not saying that a higher octane fuel ie 93 on my little civic that only needs 87 will give me any increased performance. I highly doubt that using 93 could have any detrimental effects, except to my wallet. Feel free to post any evidence supporting your point.</TD></TR></TABLE>

Look, I am not here to prove anything to those who don't understand. I made a statement, if you can't live with it, research it and find your answer. All I am saying is that if you put a stock civic, say a y8, on a dynojet and the only variable between pulls is fuel octane, 92 or 93 will not be the better of the runs..

 

my owners manul says 93 octain

 

really? 93 octane for what engine? are you sure it doesn't say 91?

Please confirm.

Vince

 

Arizona is right on this one guys . Don't run the expensive **** if you don't have to...its only going to hurt performance.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by panrahk &raquo;</TD></TR><TR><TD CLASS="quote">my owners manul says 93 octain</TD></TR></TABLE>
for what car???

 

91 miss typed my bad

 

i thought the higher the octance the better..since the more combustion and also less carbon deposit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brooksto &raquo;</TD></TR><TR><TD CLASS="quote">
Im no rocket scientist, but I believe the higher the octane, the better it resists preignition. Now again I ask you, what evidence do you have that a higher octane fuel on an engine that only requires a lower octane to avoid preignition causes a loss of performance? </TD></TR></TABLE>

Higher octain fuel burns slower. Slower burn=less power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by infinatenexus &raquo;</TD></TR><TR><TD CLASS="quote">

Higher octain fuel burns slower. Slower burn=less power.</TD></TR></TABLE>

in a way...

Higher Octane burns slower, allowing you to advance the timing more. This is best of higher compression, (i.e. above 10:1).

If you ran 87 in your NSX, the knock sensor would autmatically retard the timing so you can go without detonation.
But, you cant do this forever, not to mention it takes away performance.

So i you have an unmodified engine, run 87. Or even 85 (my cousing says there is 85 in indiana. maybe that tax free off road gas.)

Advancing the timing to run 93 octane (16-18 degrees advance) will only yield a few horsepower in the higher RPM on your y8.

So run 87

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by panrahk &raquo;</TD></TR><TR><TD CLASS="quote">91 miss typed my bad</TD></TR></TABLE>

Well nobody really answered my question...what octane is the D16Y8 supposed to take? Is 91 correct? The reason i ask is because the stock compression is 9.4:1 (or 9.6:1?). On the high side for stock engines...

Thanks,

Vince

 

my owners manual says 87.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Look, I am not here to prove anything to those who don't understand.</TD></TR></TABLE>
Way to back up your statements with facts I have searched, some have said it may harm emissions systems in the long run, but I havent found any dyno plots that would prove your theory of performance loss.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AgentJam &raquo;</TD></TR><TR><TD CLASS="quote">

Well nobody really answered my question...what octane is the D16Y8 supposed to take? Is 91 correct? The reason i ask is because the stock compression is 9.4:1 (or 9.6:1?). On the high side for stock engines...

Thanks,

Vince</TD></TR></TABLE> I would say based upon the intelligent feudings above, that 87 or 89 would do you just fine. But i'll check the helms when i get home. I personally use 89 on my D-series.

 

SOHC D-series engines require only regular fuel (86, 87).

DOHC VTEC engines require a minimum of 91 octane.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr. Teal &raquo;</TD></TR><TR><TD CLASS="quote">Advancing the timing to run 93 octane (16-18 degrees advance) will only yield a few horsepower in the higher RPM on your y8.

So run 87 </TD></TR></TABLE>


126whp at 18Degress advanced on 87 Octane.

91 is only needed at 10:1 or higher.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spade &raquo;</TD></TR><TR><TD CLASS="quote">


126whp at 18Degress advanced on 87 Octane.

91 is only needed at 10:1 or higher.</TD></TR></TABLE>

Or tha boost y0! I don't run anything buy 93 in mines now!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton &raquo;</TD></TR><TR><TD CLASS="quote">

Or tha boost y0! I don't run anything buy 93 in mines now!</TD></TR></TABLE>

Well boost = more air right? More air = more stuff to squeeze. More stuff to squeeze = higher compression

DUH.