91 octane - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 8 Old 04-13-2009, 05:04 PM Thread Starter
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91 octane

So I see some guys on here runnin low to mid 400's hp on stock top end turbocharged motors on 93 or more octane. Anybody know what the top hp is on 91 octane?

My car is a basic h/c/i car andii am putting on my BG 70mm kit right now. I was hoping to get mid 400's out of it on 91 octane since that is what we have around here .

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post #2 of 8 Old 04-13-2009, 07:08 PM
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That shouldn't be too far fetched assuming you are running aluminum heads and an intercooler. It's only going to take ~ 5-7lbs of boost to get to those levels...and the risk of detonation is quite low.

Of course, you could always throw a meth injection on top of it if you get overly worried.


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post #3 of 8 Old 04-13-2009, 09:23 PM
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You have any E-85 pumps close to you?

89 GT--428 Dart Block 9.1:1, AFR 225's, Edelbrock Super Victor EFI ,Bullet Cams turbo cam, Accufab 90mm TB, TH-400, Ultimate Converter, AEM EMS, twin GT4088's
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post #4 of 8 Old 04-14-2009, 12:07 PM Thread Starter
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not that I am aware of. All I ever see nowadays is 91 89 and 87. Anybody else around here have to run 91 on their turbo with no meth?
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post #5 of 8 Old 04-14-2009, 12:37 PM
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Even with 93 octane i will add 110 to bump up the rating a tad.

Stock block, GT40 heads, Explorer intake, 67mm, 10lbs, 431HP 497TQ on 110 octane. 12.01 @ 123
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post #6 of 8 Old 04-14-2009, 01:26 PM
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mid 400s should be simple ,,
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post #7 of 8 Old 04-14-2009, 01:49 PM
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I dunno about mid 400s but have done mid 500s on 91.

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post #8 of 8 Old 04-14-2009, 05:42 PM Thread Starter
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with my stock block mid 400's would make me happy. Wanna keep it alive for a bit.
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