What octane gas does everyone use? (n/a and turbo)

notched86

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Aug 7, 2002

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Ruckersville, VA

Mar 15, 2004

#1

• Mar 15, 2004

• #1

What octane gas is everyone using? I had always just put 87 in my n/a 2.3, but I was curious as to whether I would see a slight increase in performance by using premium.

Do the 2.3T's boost higher with 91 or 93 octane gas? Can they even run on 87 without knocking?

Thanks

 

9

91_4ourBanger

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Feb 8, 2004

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#2

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i use the cheap 87 in my N/A i dont care if it messes it up. i have finally decided to get a 5.0 this summer to put into her

 

93tealstang

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Jan 24, 2002

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Mar 15, 2004

#3

• Mar 15, 2004

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I run nothing but 87 on my N/A and the turbo coupe. Both run great. Unless you got a turbo car that's hopped up a little, you should try to run 87 unless ofcourse you can't without knocking.

 

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Pro-Hawk

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Dec 4, 2003

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Mar 15, 2004

#4

• Mar 15, 2004

• #4

Anything under 9:5.1 use 87 oct and anything over 9:5.1 use 91-93 oct and you be ok

(If you run more octain on a low compression motor it will cause your gass mileage to go down since it don't burn right I believe also. I believe it takes more to burn the high octain fuel is why but don't qoute me)( now if you run low octain on a high compression motor it will detonate)


I use 87 oct in my N/A and 91-93 in my SVO. Now on a 2.3T I think its 10psi and under 87-89 and 11psi and over 91-93 oct. If you got a fuel switch and everything is hooked up like the stock boost controller on reg fuel it set the system up at no more than 10psi with less timming also. Once you flip to the preimum fuel it goes to something like 14.5 ( on SVO's ) and more timming. The timming is a difference of 3 degrees I think. I hope that helps.

 

notched86

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Ruckersville, VA

Mar 15, 2004

#5

• Mar 15, 2004

• #5

Alright, thanks for the info Pro-hawk.

You know what would be cool to see? I'd like to see how a n/a 2.3 would respond to 100+ octane race gas.

 

Bearded Forever

Type O Danzigative the Dark

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Vinland

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#6

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It wouldn't.
The fuel would burn too slow and it would run worse than normal.

 

S

ssjmaverick23

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denham spr louisiana

Mar 15, 2004

#7

• Mar 15, 2004

• #7

i run 91 oct in my 88 na if i run 87 it acts funny and it i run 93 it bogs down

 

radartec

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Northern CA

Mar 15, 2004

#8

• Mar 15, 2004

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I need to run 91 Octane in my carb turbo or it will diesel after you shut it off.

 

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G-90

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#9

• Mar 15, 2004

• #9

I run 94 in my turbo and cheap 87 in the N/A 2.3

The Higher octane burns slower and allows the piston to reach closer to TDC before complete combustion, thus reducing or hopefully eliminating detonation.

Even in a normal aspirated engine you may need to use higher octane if you
a. raise compression
b. advance timing

 

P

Pro-Hawk

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Mar 15, 2004

#10

• Mar 15, 2004

• #10

ssjmaverick23 said:

i run 91 oct in my 88 na if i run 87 it acts funny and it i run 93 it bogs down

Click to expand...

I guess your the exception to the rule I had a old Chevy that was the same way If I ran 87 it sucked but if I ran 89 it ran like a champ


As for the imfo NP I just hope I got that right and it helped ya out and for the race fuel listen to Corvax

unless you mill the heck out of that head and got the compression up to 9:7.1 or something like that. I wonder, didn't Buff mill his head that much ? I wonder what fuel he runs ?

 

notched86

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Ruckersville, VA

Mar 16, 2004

#11

• Mar 16, 2004

• #11

Pro-Hawk said:

I guess your the exception to the rule I had a old Chevy that was the same way If I ran 87 it sucked but if I ran 89 it ran like a champ


As for the imfo NP I just hope I got that right and it helped ya out and for the race fuel listen to Corvax

unless you mill the heck out of that head and got the compression up to 9:7.1 or something like that. I wonder, didn't Buff mill his head that much ? I wonder what fuel he runs ?

Click to expand...

I was wondering what kinda gas brian was using too. I would imagine with the raised compression and nitrous he's at least running 91.

 

P

Pro-Hawk

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Mar 16, 2004

#12

• Mar 16, 2004

• #12

notched86 said:

I was wondering what kinda gas brian was using too. I would imagine with the raised compression and nitrous he's at least running 91.

Click to expand...

I would have to agree with ya.

 

Bearded Forever

Type O Danzigative the Dark

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#13

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Pro-Hawk said:

and for the race fuel listen to Crovax

Click to expand...

 

D

Dan'l

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wisconsin

Mar 16, 2004

#14

• Mar 16, 2004

• #14

Be quiet guys, my 91 might hear you.It's running 87 octane and doesn't know anybetter As some of you know, my 91dp has been milled .060. Earlier on I had a few issues with the computer, but currently it isn't arguing with 87 octane and seems quite happy.(it better because it's getting parted out the next time it hiccups),the rear suspension mounting points are just about gone.

 

Lx89Stang05

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S.E. Mass

Mar 16, 2004

#15

• Mar 16, 2004

• #15

87@10psi, 93+@15+psi

 

Asha'man

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Feb 5, 2002

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Denver

Mar 17, 2004

#16

• Mar 17, 2004

• #16

I have to run premium 91 octane or I get massive detonation. Dunno how to fix it.....I should check the timing while I'm replacing my power steering pump tomorrow.

Ash