Low compression and low Octane?

brad65 · July 27th, 2006, 08:08 PM

I think my motor is built having low compression. There was a blower on the car which I removed for many reasons. Anyway since I removed it I can run 18 degrees BTC with out pinging, even it 5th up a hill. But I'm still running one degree lower plug and 93 octane. The question hopefully you guy can help me with is.... Should I run 87 (regular) and get hotter plugs untill it pings. Would this be like getting more compression out of my motor?

stang fanatic · July 28th, 2006, 11:44 AM

changing your fuel will not change your compression...its only about efficiency to fuel burning

artisan00 · July 28th, 2006, 12:09 PM

from what i understand, use the lowest octane you can without pinging. anything higher is a waste of money and less efficient...

mdvaldosta · July 28th, 2006, 12:26 PM

Originally Posted by artisan00

from what i understand, use the lowest octane you can without pinging. anything higher is a waste of money and less efficient...

exactly. Put the stock heat range plugs back in it and bring the timing down to 10* and run 87... or put the timing wherever you want and start dropping the octane as low as you can.

brad65 · July 28th, 2006, 05:05 PM

I will try this and I'll let you guy know. Thanks

loudenough · July 28th, 2006, 05:53 PM

lower in types of gas will be harder on the motor as if not always detination will ocurr and will shorten the life of the engine.How ever you can run lower end gas and just throw so boosters in on fill up(most say 3 point min but I would dubble up on them to get the min)

July 27th, 2006, 08:08 PM	#1
brad65 Newbie Join Date: Jul 2006 Posts: 3 iTrader: 0 reviews	Low compression and low Octane? I think my motor is built having low compression. There was a blower on the car which I removed for many reasons. Anyway since I removed it I can run 18 degrees BTC with out pinging, even it 5th up a hill. But I'm still running one degree lower plug and 93 octane. The question hopefully you guy can help me with is.... Should I run 87 (regular) and get hotter plugs untill it pings. Would this be like getting more compression out of my motor? __________________ 1990 GT 306 fully forged, O-ringed Windsor Jr ported Alum heads, Edelbrook Performer, 1.6 FMSRR, E-303, FMS Shortys, 93 Cobra ECU, 24 lb, 93 Cobra MAF, MSD adjustable FPG, 3.73, stock h-pipe. Still slow.

July 28th, 2006, 11:44 AM	#2
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 855 iTrader: 0 reviews	changing your fuel will not change your compression...its only about efficiency to fuel burning __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

July 28th, 2006, 05:05 PM	#5
brad65 Newbie Join Date: Jul 2006 Posts: 3 iTrader: 0 reviews	I will try this and I'll let you guy know. Thanks __________________ 1990 GT 306 fully forged, O-ringed Windsor Jr ported Alum heads, Edelbrook Performer, 1.6 FMSRR, E-303, FMS Shortys, 93 Cobra ECU, 24 lb, 93 Cobra MAF, MSD adjustable FPG, 3.73, stock h-pipe. Still slow.

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July 28th, 2006, 12:09 PM	#3
artisan00 Regular Join Date: Sep 2005 Posts: 423 iTrader: 0 reviews	from what i understand, use the lowest octane you can without pinging. anything higher is a waste of money and less efficient...

July 28th, 2006, 05:53 PM	#6
loudenough Regular Join Date: Jul 2006 Location: Ontario Posts: 191 iTrader: 0 reviews	lower in types of gas will be harder on the motor as if not always detination will ocurr and will shorten the life of the engine.How ever you can run lower end gas and just throw so boosters in on fill up(most say 3 point min but I would dubble up on them to get the min)

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