When I rebuilt my 232 for my 1954 Commander Coupe I had tempered seats installed for the valves to close against since there is no longer any leaded gas, now my question is which octane should I run? the highest or the lowest which in my area is from about 92 to 84 octane any suggestions...
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Domenic Manera, Fire Chief
City of York Fire Department
York, SC 29745
1954 Regal Starlight Coupe
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I'm running regular in my re-built 289 Champ with thin head gaskets,and do'nt see that as a problem!Joseph R. Zeiger -
Hi Dominic,the highest compression engine needs the highest octane.I assume your seats are ready for unleaded fuel,greets Dick Waterreus
ps low is 6:1 high is 9:1 compression so if needed measure the afterrebuilt compression.Last edited by hawk gt 62 rhd; 07-26-2010, 12:01 PM.Comment
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Of the 85 vs. 89 vs. 91 in my area, I run the 87 oct.
The 85 should work fine if you run low (stock) ignition timing values. I run my timing quite high so I run the 89 around town but on longer trips (200+ miles) I run the 91 oct. stuff.
The higher timing gives the throttle a little more snap and a touch more milage. Though the milage is a wash (or worse) because of the higher 91 oct. fuel cost.
MikeComment
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No significant difference between 87 and 92 in the Champ. StevesigpicComment
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Very interesting find this weekend. I drained the 92 octane out and refilled with the 87 octane and now the car runs smooth again at low speed.Domenic Manera, Fire Chief
City of York Fire Department
York, SC 29745
1954 Regal Starlight Coupe
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