Driveability of high compression cars

**Dave Rifkin** · #1 11-15-2005, 10:13 PM

I am contemplating the purchase of a 1970 Z28 and was wondering how you guys deal with the need for high octane fuel for these cars? Do you install thicker head gaskets to reduce compression ratio or are there other tricks to make these types of cars more driveable with today's available fuels?

Stuart Adams · #2 11-15-2005, 10:19 PM

How much are you going to drive it?

**MosportGreen66** · #3 11-15-2005, 10:21 PM

We buy leaded fuel from a guy in CT.

Baldy · #4 11-17-2005, 06:12 PM

I buy the highest octain pump gas and mix it with Av. gas 50/50 mix. This works well on my 427 C.I.

68l30 · #5 11-17-2005, 08:26 PM

I run my 327 on 94 Sunoco....It has a .003 deck (cut pistons & squared the deck front to rear and side to side ) with a true 10.5 to 1 compression.No problems.....My guess is without a true blueprint most 11 to 1 motors are hardly that.I would have been lucky to get 9 to 1 on mine.

Steve

**Mr70** · #6 11-18-2005, 03:11 AM

I run the Jack Podell Lead/Octane additive in my soft valve seated L-78 Chevelle for years now.Just 12 oz. to every 10 gallons of 93 seems to agree with it.
She does run hotter though.

**Dave Rifkin** · #7 11-15-2005, 10:32 PM

[ QUOTE ]
How much are you going to drive it?

[/ QUOTE ]

I would hope to be able to drive it on weekends and other nice days.

Stuart Adams · #8 11-15-2005, 10:50 PM

Can you buy high octane fuel in your area?

**Salvatore** · #9 11-15-2005, 11:00 PM

I drive my Z with 10.5 to 1 and have no trouble at all. I mix some of that Jack Podells true lead octane booster with 93 octane. Buy it by the case. Works great. You can get up to 103 octane. Its called: Max Lead 2000. Aviation fuel is iffy in my opinion. JMO

Stuart Adams · #10 11-15-2005, 11:03 PM

Call Charley, he probably can get you a discount since he will now be buying Jet A........

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