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#1
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Minimum octane for Windsor class engines?
With gas prices headed for the $3 mark for the summer, what's the
lowest recommended octane rating for 289/351W engines? I know... the lowest I can use without knock, but would like to know what is actually recommended. Thanks. Hey! Spikey Likes IT! 1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok Vintage Burgundy w/Black Standard Interior Vintage 40 Wheels 16X8" w/BF Goodrich Comp T/A Radial 225/50ZR16 |
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#2
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Spike wrote:
> With gas prices headed for the $3 mark for the summer, what's the > lowest recommended octane rating for 289/351W engines? I know... the > lowest I can use without knock, but would like to know what is > actually recommended. Thanks. I can retard the timing on my 8.75:1 302 4v to 5-6deg initial, using a curve that gives full advance by 3500, and cannot use regular unleaded without a ping somewhere in there (at 550 ft. elevation). However, it is always set for 10-12 deg. initial, with full advance by about 2800. I run 89, and time it for 89 by ear. I get better mileage with a more aggressive timing curve. More vacuum, and better response. $30 for 200 miles sucks, but it could be worse.. Whaddyouwant for 8 carbed cylinders...... When gas prices spike, I drive the beater more, thassall > Hey! Spikey Likes IT! > 1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok > Vintage Burgundy w/Black Standard Interior > Vintage 40 Wheels 16X8" > w/BF Goodrich Comp T/A Radial 225/50ZR16 -- Wound Up ThunderSnake #65 |
#3
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Thanks for the info on the racing stripe, I'll try waxing it today!
"Spike" > wrote in message news > With gas prices headed for the $3 mark for the summer, what's the > lowest recommended octane rating for 289/351W engines? I know... the > lowest I can use without knock, but would like to know what is > actually recommended. Thanks. When I bought my 02 GT it was in July so the weather was pretty warm here in Orlando, I was using regular grade 87-89 octane with no problems there. But when winter came and the weather started cooling off into mid 30-50 deg reange my engine started knocking. I brought it back to my dealer and they checked it out and "re-flashed" the computer since then I don't have much problem this winter using regular gas. I will here a knock if I lug the engine. |
#4
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Adrian Gruber wrote:
> Thanks for the info on the racing stripe, I'll try waxing it today! > > "Spike" > wrote in message > news > >>With gas prices headed for the $3 mark for the summer, what's the >>lowest recommended octane rating for 289/351W engines? I know... the >>lowest I can use without knock, but would like to know what is >>actually recommended. Thanks. > > When I bought my 02 GT it was in July so the weather was pretty warm here in > Orlando, I was using regular grade 87-89 octane with no problems there. But > when winter came and the weather started cooling off into mid 30-50 deg > reange my engine started knocking. I brought it back to my dealer and they > checked it out and "re-flashed" the computer since then I don't have much > problem this winter using regular gas. I will here a knock if I lug the > engine. Thanks for the suggestion, but we cannot re-flash carburetors and distributors. -- Wound Up ThunderSnake #65 |
#5
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Spike wrote:
> With gas prices headed for the $3 mark for the summer, what's the > lowest recommended octane rating for 289/351W engines? I know... the > lowest I can use without knock, but would like to know what is > actually recommended. Thanks. > Hey! Spikey Likes IT! > 1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok > Vintage Burgundy w/Black Standard Interior > Vintage 40 Wheels 16X8" > w/BF Goodrich Comp T/A Radial 225/50ZR16 There are a lot of factors involved, so there really is no simple answer. Compression ratio, valve timing and overlap, and ignition timing are major contributors. But cylinder head temp, ambient air temp, barometric pressure, humidity, and engine load all play a role. My dodge does really well on mid grade, especially in the winter. But if I'm towing a moderately heavy trailer I add a little premium or it will knock. My '74 302 (in my '66) never knocks on the cheap stuff - it has 9:1 compression and an RV cam. The 427W in my cobra needs premium. -- ..boB 1997 HD FXDWG - Turbocharged! 2001 Dodge Dakota QC 5.9/4x4/3.92 1966 Mustang Coupe - Daily Driver 1966 FFR Cobra - Ongoing project |
#6
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My beater 87 Escort with the 1.9L gets 32mpg. It's ugly, it still has deer hoof prints in the radiator fins (the grill went first), it's slow.... but it only cost me $500 and it's sure cheap to run. I just wear sunglasses and a big floppy hat, and park way out in the boonies where nobody will recognize me. On Sat, 05 Mar 2005 05:49:21 GMT, Wound Up > wrote: >Spike wrote: >> With gas prices headed for the $3 mark for the summer, what's the >> lowest recommended octane rating for 289/351W engines? I know... the >> lowest I can use without knock, but would like to know what is >> actually recommended. Thanks. > >I can retard the timing on my 8.75:1 302 4v to 5-6deg initial, using a >curve that gives full advance by 3500, and cannot use regular unleaded >without a ping somewhere in there (at 550 ft. elevation). > >However, it is always set for 10-12 deg. initial, with full advance by >about 2800. I run 89, and time it for 89 by ear. I get better mileage >with a more aggressive timing curve. More vacuum, and better response. > $30 for 200 miles sucks, but it could be worse.. > >Whaddyouwant for 8 carbed cylinders...... > >When gas prices spike, I drive the beater more, thassall > >> Hey! Spikey Likes IT! >> 1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok >> Vintage Burgundy w/Black Standard Interior >> Vintage 40 Wheels 16X8" >> w/BF Goodrich Comp T/A Radial 225/50ZR16 Hey! Spikey Likes IT! 1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok Vintage Burgundy w/Black Standard Interior Vintage 40 Wheels 16X8" w/BF Goodrich Comp T/A Radial 225/50ZR16 |
#7
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Fortunately, I have no computer to deal with.
On Sat, 05 Mar 2005 13:31:01 GMT, "Adrian Gruber" > wrote: >Thanks for the info on the racing stripe, I'll try waxing it today! > >"Spike" > wrote in message >news >> With gas prices headed for the $3 mark for the summer, what's the >> lowest recommended octane rating for 289/351W engines? I know... the >> lowest I can use without knock, but would like to know what is >> actually recommended. Thanks. >When I bought my 02 GT it was in July so the weather was pretty warm here in >Orlando, I was using regular grade 87-89 octane with no problems there. But >when winter came and the weather started cooling off into mid 30-50 deg >reange my engine started knocking. I brought it back to my dealer and they >checked it out and "re-flashed" the computer since then I don't have much >problem this winter using regular gas. I will here a knock if I lug the >engine. > Hey! Spikey Likes IT! 1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok Vintage Burgundy w/Black Standard Interior Vintage 40 Wheels 16X8" w/BF Goodrich Comp T/A Radial 225/50ZR16 |
#8
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We can't? That should disappoint Kate..... Nothing to laugh at... LOL
Oh, well, it's too warm to wear the overcoat in the summer anyway...... : ) On Sat, 05 Mar 2005 16:12:01 GMT, Wound Up > wrote: >Adrian Gruber wrote: >> Thanks for the info on the racing stripe, I'll try waxing it today! >> >> "Spike" > wrote in message >> news >> >>>With gas prices headed for the $3 mark for the summer, what's the >>>lowest recommended octane rating for 289/351W engines? I know... the >>>lowest I can use without knock, but would like to know what is >>>actually recommended. Thanks. >> >> When I bought my 02 GT it was in July so the weather was pretty warm here in >> Orlando, I was using regular grade 87-89 octane with no problems there. But >> when winter came and the weather started cooling off into mid 30-50 deg >> reange my engine started knocking. I brought it back to my dealer and they >> checked it out and "re-flashed" the computer since then I don't have much >> problem this winter using regular gas. I will here a knock if I lug the >> engine. > >Thanks for the suggestion, but we cannot re-flash carburetors and >distributors. Hey! Spikey Likes IT! 1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok Vintage Burgundy w/Black Standard Interior Vintage 40 Wheels 16X8" w/BF Goodrich Comp T/A Radial 225/50ZR16 |
#9
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Valid, however, it seems to me that the original Ford Owners Manual
indicated which gas grade to use. Unfortunately, I don't have the OWners Manual. On Sat, 05 Mar 2005 09:22:00 -0700, ".boB" > wrote: >Spike wrote: >> With gas prices headed for the $3 mark for the summer, what's the >> lowest recommended octane rating for 289/351W engines? I know... the >> lowest I can use without knock, but would like to know what is >> actually recommended. Thanks. >> Hey! Spikey Likes IT! >> 1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok >> Vintage Burgundy w/Black Standard Interior >> Vintage 40 Wheels 16X8" >> w/BF Goodrich Comp T/A Radial 225/50ZR16 > > There are a lot of factors involved, so there really >is no simple answer. Compression ratio, valve timing >and overlap, and ignition timing are major >contributors. But cylinder head temp, ambient air >temp, barometric pressure, humidity, and engine load >all play a role. > My dodge does really well on mid grade, especially >in the winter. But if I'm towing a moderately heavy >trailer I add a little premium or it will knock. My >'74 302 (in my '66) never knocks on the cheap stuff - >it has 9:1 compression and an RV cam. The 427W in my >cobra needs premium. Hey! Spikey Likes IT! 1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok Vintage Burgundy w/Black Standard Interior Vintage 40 Wheels 16X8" w/BF Goodrich Comp T/A Radial 225/50ZR16 |
#10
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Yep... my rusting '89 5 sp. Tempo gets between 28-33, and the a/c works.
It's approaching 200,000, been backed into twice, is not much faster than the Escort, but comfortable (for me anyway) and cruises at 70 just fine. I could care less if people think badly of me because of my car... Spike wrote: > My beater 87 Escort with the 1.9L gets 32mpg. It's ugly, it still has > deer hoof prints in the radiator fins (the grill went first), it's > slow.... but it only cost me $500 and it's sure cheap to run. I just > wear sunglasses and a big floppy hat, and park way out in the boonies > where nobody will recognize me. > > On Sat, 05 Mar 2005 05:49:21 GMT, Wound Up > wrote: > > >>Spike wrote: >> >>>With gas prices headed for the $3 mark for the summer, what's the >>>lowest recommended octane rating for 289/351W engines? I know... the >>>lowest I can use without knock, but would like to know what is >>>actually recommended. Thanks. >> >>I can retard the timing on my 8.75:1 302 4v to 5-6deg initial, using a >>curve that gives full advance by 3500, and cannot use regular unleaded >>without a ping somewhere in there (at 550 ft. elevation). >> >>However, it is always set for 10-12 deg. initial, with full advance by >>about 2800. I run 89, and time it for 89 by ear. I get better mileage >>with a more aggressive timing curve. More vacuum, and better response. >> $30 for 200 miles sucks, but it could be worse.. >> >>Whaddyouwant for 8 carbed cylinders...... >> >>When gas prices spike, I drive the beater more, thassall >> >> >>>Hey! Spikey Likes IT! >>>1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok >>>Vintage Burgundy w/Black Standard Interior >>>Vintage 40 Wheels 16X8" >>>w/BF Goodrich Comp T/A Radial 225/50ZR16 >> > > Hey! Spikey Likes IT! > 1965 Ford Mustang fastback 2+2 A Code 289 C4 Trac-Lok > Vintage Burgundy w/Black Standard Interior > Vintage 40 Wheels 16X8" > w/BF Goodrich Comp T/A Radial 225/50ZR16 -- Wound Up ThunderSnake #65 |
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