Why GT's Run on Regular?
08-17-2005, 08:59 AM
#21
3rd Gear Member
Join Date: Apr 2005
Posts: 607
RE: Why GT's Run on Regular?
ORIGINAL: 04BlueGT
Higher compression N/A motors (Mach 1) and forced air motors (Cobra) require higher octane fuel to avoid detonation. If you're not familiar with the term, detonation is that wonderful event that puts holes in pistons (if you're lucky) or ventilates your block with a connecting rod. Of course, neither one is a good thing.
Ford engineered the GT to run on 87 for a reason: it's cheaper. You can now buy your GT, pay less at the pump, and feel good about the money you saved. Quite clever sales gimmick, really.
You can run higher octane fuels in the GT, but you get no gains from it. However, you may build up residue on the valves and exhaust runners. I believe it is carbon build up. Correct me if I'm wrong folks.
If you advance the timing, you'll want 91/93 octane in your pony to avoid detonation. I know you can advance the timing to 14 on a N/A car, but is that on 87 or 93 octane? I never read anything about the grade of fuel in the articles.
Higher compression N/A motors (Mach 1) and forced air motors (Cobra) require higher octane fuel to avoid detonation. If you're not familiar with the term, detonation is that wonderful event that puts holes in pistons (if you're lucky) or ventilates your block with a connecting rod. Of course, neither one is a good thing.
Ford engineered the GT to run on 87 for a reason: it's cheaper. You can now buy your GT, pay less at the pump, and feel good about the money you saved. Quite clever sales gimmick, really.
You can run higher octane fuels in the GT, but you get no gains from it. However, you may build up residue on the valves and exhaust runners. I believe it is carbon build up. Correct me if I'm wrong folks.
If you advance the timing, you'll want 91/93 octane in your pony to avoid detonation. I know you can advance the timing to 14 on a N/A car, but is that on 87 or 93 octane? I never read anything about the grade of fuel in the articles.
08-17-2005, 12:28 PM
#23
3rd Gear Member
Join Date: Mar 2005
Location: Omaha, NE
Posts: 767
RE: Why GT's Run on Regular?
Stupid question, but is 91 considered high-octane? Here in the Midwest, you have 87, 91 and 92 octane. The 91 (mid-grade with ethanol) is usually the cheapest, so that’s what I have been using. Plus, 92 is just a <unt-hair more in octane, but A LOT more in $$$. I’m sure that 93 is sold around here somewhere (Shell, from what I’ve heard), but have not had the need to seek it out.
Just wondering….
Just wondering….
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