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12 to 1 compression

Started by Highbanked Hauler, September 20, 2011, 08:27:47 AM

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Highbanked Hauler

September 20, 2011, 08:27:47 AM
I am looking at two different  440 engines with steel heads and they both have 12 to 1 compression and both owners tell me that they will run on pump gas..  I thought 10-1 was the limit on compression and 93 octane..    :-\
69 Charger 500, original owner  
68 Charger former parts car in process of rebuilding
92 Cummins Turbo Diesel
04 PT Cruiser

RECHRGD

#1
September 20, 2011, 08:53:39 AM
If they are really 12 to 1, then no way.  Not even using 1960's 102 octane.
13.53 @ 105.32

Highbanked Hauler

#2
September 21, 2011, 08:30:42 PM
 What is the highest compression you can do with aluminum heads?
69 Charger 500, original owner  
68 Charger former parts car in process of rebuilding
92 Cummins Turbo Diesel
04 PT Cruiser

69charger440

#3
September 21, 2011, 10:40:12 PM
11:1
1969 Charger 540 Blown Hemi 1000HP, 69 Road Runner 500 Stroker 665 HP

FLG

#4
September 21, 2011, 11:19:52 PM
Is it a true 12:1 or is that what was listed on a set of pistons? For example, i can buy pistons labeled as 10:1 but if they were sunk under deck than thats probably no longer the case. Can you get specs? Pistons, deck height, combustion chamber cc's..etc?
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