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Old 07-13-2012, 02:55 AM
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Default need advice?/motor specs

going to look at this car saturday, my question is can i run this motor that has 11:1 compression and cast iron ram air 3 heads on 93 octane or would i need to run 110 octane?

http://hartford.craigslist.org/cto/3061181453.html
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Old 07-13-2012, 03:11 AM
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Old 07-13-2012, 03:15 AM
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11:1 is fine with iron heads.. Ive done 12.4:1 on pump with dialing the timing back..

I wouldnt worry about it though one bit. Also if you really wanted to you could add some 100, no need for 110. Run like 32-34* timing and youre good IMO
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Old 07-13-2012, 09:18 PM
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Quote:
Originally Posted by 84ta406 View Post
11:1 is fine with iron heads.. Ive done 12.4:1 on pump with dialing the timing back..

I wouldnt worry about it though one bit. Also if you really wanted to you could add some 100, no need for 110. Run like 32-34* timing and youre good IMO
yeah the guy said he runs a 50/50 mix. just not sure where to even buy race fuel anymore, the sunoco in worcester on highland st sold 110 but they closed.
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Old 07-13-2012, 03:21 AM
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Oh boy here we go again lol dz302 thread again lol
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Old 07-13-2012, 04:13 AM
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I don't have direct experience but i know of plenty of guys running well over 12:1 sbc's on 93 pump gas without a problem
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Old 07-13-2012, 10:47 AM
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No problem at all car will run happier. Good luck going to look at it, its a nice looking clean car.
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Old 07-13-2012, 09:34 PM
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110 would be way too much. You can over octane a motor and it can hurt things. 100 octane max but you should be able to get away with the 93 providing the tune is done well. Theres no reason to run anything else. I used to run 93 on my 10.8:1 iron motor.

The closest place to get race gas is NE Dyno if I remember right.
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Old 07-13-2012, 10:17 PM
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thanks josh,i appreciate the info. going to look at it saturday, so hopefully its everything the guy says it is.
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Old 07-15-2012, 12:34 PM
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im not even going to say my 2 cents cuz it always turns into a shit show. but all im going to say is for a street car and 93 octane. you do not want to run more then 10:1 on a Iron Head and thats pushing it.
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