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Old 03-24-2004   #1 (permalink)
fast9350 is offline Rookie


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Default race or pump gas

I am building a 331 engine, with trick flow heads, a huge cam, supercharger,etc. what type of gas do you think i would have to use, or could I use pump gas on the street and race gas at the track. its not a daily driver, will use it mostly for cruising and at the track.
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Old 03-24-2004   #2 (permalink)
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Unless you are going high compression, over 9.5 to 1, or running a ton of boost on a blown engine there is no reason 92 or 93 octane would not do fine.
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Old 03-24-2004   #3 (permalink)
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running over 10:1 plus the charger running at 10 to 11 psi
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Old 03-24-2004   #4 (permalink)
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10-11psi with 10:1 compression?

On boost that could put you in the 15:1 and up range!

Danger Will Robertson, DANGER!
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Old 03-24-2004   #5 (permalink)
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yeah i know, i am thinking in getting the heads ported, but i still want the compression to be 10:1 to 10.5:1. So only race fuel?
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Old 03-25-2004   #6 (permalink)
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Why the high compression w/ the blower? Is it already built? I would suggest nothing but race ful at that compression, but you might consider raising the head cc to compensate, or different pistons. JMO
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Old 03-25-2004   #7 (permalink)
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i think the piston heads are the way to go... cheap fix to lower the compression ratio. my 2 cents
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Old 03-25-2004   #8 (permalink)
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if you are going to run a blower i wouldnt have my compration over 9.1 and it it was me i would go no higher then 8.5
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Old 03-25-2004   #9 (permalink)
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Yes when i bought my stroker kit, it read 10.13:1 @ 58 cc, my heads are rated at 64 cc. so actually i dont know what my compression is going to be with the 10 to 11 psi on the blower. Then hopefully in the next 6 months i will be buying at new blower that is rated at 18 psi.
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Old 03-25-2004   #10 (permalink)
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first is it forged? i would buy blower pistons so you dont hurt anything because you will breck a alot running 10.1 comp at 18 psi
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Old 03-25-2004   #11 (permalink)
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yeah after i get the new blower i will change the piston. Yes they are forged, Probe piston with scat rods and crank
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Old 03-25-2004   #12 (permalink)
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actually this is a good site
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Old 03-26-2004   #13 (permalink)
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dude;be advised you dont need race fuel. At least not 24-7. You need 93 24-7.If you know your going to be blasting around tonight or tomorrow then you need to mix by adding race fuel thats it my man.
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Old 03-27-2004   #14 (permalink)
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When are we not "blasting around?" I dont know about you Stingrey, but everytime my engine starts, its GO TIME!!!!
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Old 03-28-2004   #15 (permalink)
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Hey thanks al.l I havent got the engine back but I can't wait to eat more rice and untie some bow ties
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