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06-02-2008, 07:40 PM
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#1 |
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Registered User
 
Join Date: Sep 2003
Location: Angels camp, CA
Posts: 30
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can boost change with a higher octane fuel
I am looking at buying a 90 notchback with vortech and
the guy who owns it says on 91 octane it only sees 10 psi of boost, but without doing anything else but changing the tune on the switch and running 110 the car produces 14psi, is this right? i figured you would have to change pulleys to change max boost |
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06-03-2008, 12:04 AM
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#2 |
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Registered User
Join Date: Sep 2003
Location: Angels camp, CA
Posts: 30
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Re: can boost change with a higher octane fuel
is this a stumper or just a dumb question? either way i need some
expertise. |
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06-03-2008, 12:08 AM
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#3 |
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Roll Tide !
 Join Date: May 2004
Location: Richmond
Posts: 2,491
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Re: can boost change with a higher octane fuel
I would think the tune would allow for more timing which needs the higher octane.
__________________
"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not. " - Thomas Jefferson |
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06-03-2008, 12:19 AM
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#4 | |
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Registered User
 Join Date: Feb 2006
Location: El paso
Posts: 247
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Re: can boost change with a higher octane fuel
Quote:
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06-03-2008, 11:33 AM
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#5 |
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Registered User
Join Date: Jun 2004
Location: Madera, CA
Posts: 7,687
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Re: can boost change with a higher octane fuel
THe guy probably meant he has a tune for 110 @ 14 saved for hte car.
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Current Stable: NO stangs.....DON'T F'ING remind me.  Previous stangs: 2003 Mineral Grey Cobra Vert 1965 Factory GT K Code Coupe - mostly original and numbers matching. 14.9 (best) GONE BUT NOT FORGOTTEN!!  2003 MACh 1 AB - MINE!..SLP LM1s, PHP Spacer, and a CAI, that wont' stop whistling.  2004 MACh 1 DSG - PHP spacer, BOrla Stingers, K and N CAI, Tune, X-pipe, 1" 1-piece raised shaker...yadda yadda. |
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06-03-2008, 11:35 AM
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#6 |
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old timer
 
Join Date: Aug 2004
Location: Langley, BC
Posts: 1,889
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Re: can boost change with a higher octane fuel
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Sold: Screaming Yellow Intercooled 2.1 KB 5speed Mach 1 running a measly 8psi 
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06-03-2008, 12:58 PM
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#7 |
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Registered User
Join Date: Feb 2004
Location: Harleysville, PA
Posts: 2,144
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Re: can boost change with a higher octane fuel
You're not going to make more boost unless you spin the blower faster. I could see him getting more HP on a 110 octane tune, though. You could run more timing without detonation.
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2003 Torch Red 5 spd w/ IUP Built: 7/16/03 |
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06-03-2008, 01:49 PM
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#8 |
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Registered User
Join Date: Sep 2007
Location: Frankfort, IL
Posts: 37
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Re: can boost change with a higher octane fuel
Maybe he has a wastegate on there and it bleeds boost off with the lower octane tune...they did a dyno test on wastegates with centrifugal superchargers awhile back in a mm&ff...pretty interesting stuff
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2004 Oxford White Mach 1 IUP Show '01 Cobra Front Bumper 17x9 and 17x10.5 DD Chrome Bullits 15% Tint Black-out tail panel Black vinyl mustang letters Go Steeda Tri-Ax K&N Filter C&L Intake Off-road Prochamber Flowmasters welded in More to come...  |
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06-03-2008, 04:55 PM
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#9 |
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Registered User
Join Date: Sep 2003
Location: Angels camp, CA
Posts: 30
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Re: can boost change with a higher octane fuel
with a wastegate (bov) you would still have to change it manually?, its not hardwired to the computer and change with the tune is it?
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