I just paid $8.50 for a gallon of gasoline

[bigfrank Administrator Find all posts View Profile Close bigfrank]

Sunoco Ultra at 94 octane is still being used by many race cars.

[camachinist Super Moderator Find all posts View Profile Close camachinist]

Sunoco Ultra at 94 octane is still being used by many race cars.

Depends on the compression ratio, camshaft and trans/rear gearing and, to a lesser degree, converter flash speed (if automatic).

Actually, 8.50 isn't bad. Last drum of 112 R/M I bought was about 6.00 per, and that was resale.

This is an oft discussed topic on the VMF; my opinion is one should run the octane fuel which the engine requires to make consistent top power. You can't win races if the car isn't consistent.

Lastly, IME, iron headed engines were more sensitive to low-octane fuels than aluminum headed ones, but the iron heads could take more pre-ignition/detonation abuse.

Nice 'vert, Ken; let me know if you need any assistance.

Pat

[Guest Close Quarterbore]

Depends on the compression ratio, camshaft and trans/rear gearing and, to a lesser degree, converter flash speed (if automatic).

Actually, 8.50 isn't bad. Last drum of 112 R/M I bought was about 6.00 per, and that was resale.

This is an oft discussed topic on the VMF; my opinion is one should run the octane fuel which the engine requires to make consistent top power. You can't win races if the car isn't consistent.

Lastly, IME, iron headed engines were more sensitive to low-octane fuels than aluminum headed ones, but the iron heads could take more pre-ignition/detonation abuse.

Nice 'vert, Ken; let me know if you need any assistance.

Pat

Well, one of these days I have another website I need to get working on again... http://www.mustangreview.com

[mshatty Super Moderator Find all posts View Profile Close mshatty]

Depends on the compression ratio, camshaft and trans/rear gearing and, to a lesser degree, converter flash speed (if automatic).

Actually, 8.50 isn't bad. Last drum of 112 R/M I bought was about 6.00 per, and that was resale.

This is an oft discussed topic on the VMF; my opinion is one should run the octane fuel which the engine requires to make consistent top power. You can't win races if the car isn't consistent.

Lastly, IME, iron headed engines were more sensitive to low-octane fuels than aluminum headed ones, but the iron heads could take more pre-ignition/detonation abuse.

Nice 'vert, Ken; let me know if you need any assistance.

Pat

Pat,

Are you speaking English here?

[camachinist Super Moderator Find all posts View Profile Close camachinist]

I meant assistance with the car

Mustangs and I are pretty well acquainted...

Pat

[camachinist Super Moderator Find all posts View Profile Close camachinist]

Pat,

Are you speaking English here?

The machinist/engine builder version of it

Pat

[4ARedOctober Super Moderator Find all posts View Profile Close 4ARedOctober]

Avgas is not unleaded....they have low leaded which is blue and fully leaded which is green. I looked it up on the Chevron site and they still produce the green stuff so you should be able to find it at your local airport....it is about $3 to $4 a gallon.

A friend reccomended Aviation fule, but I think it is unleaded and I need good old fashioned LEAD. But this may work and I need to see who sells it near me.

[camachinist Super Moderator Find all posts View Profile Close camachinist]

A good example of some of the information builders utilize when developing a particular engine/fuel package.

Personally, I tried and dismissed aviation fuel due to tuning issues arising from its different chemical makeup and different heat of vaporization, but that was for a strict discipline/application in racing. It should be fine for street use.

Pat