searched, but nothing found i have a built 85mm LS-V with wiesco 12.5:1 pistons, just wondering what would the octane be, and if its possible to mix.. im going to the dyno in a couple of days, dont wanna ruin the motor on 91

-marie

 

Unless you're running an engine that was built to run leaded fuel (for instance, old V8's) then I would stay away from it. Try finding some C16, or perhaps a toluene mixture.

 

Theres nothing wrong with using leaded fuel or a mix of both, just as long as you do not have a catalytic converter on. Supposedly it will ruin the cat by clogging it I guess thats why odler v-8s used leaded fuel due the lack of emmision equipment on them. Also the lead in the fuel I was told that it helped out in the combustion chamber cause it has some lubrication properties. And I have personally run 116 octane leaded and 92 at the track and streets with no problems at all. Hope this helps.

 

yep leaded fuel wil ruin your cat and sensors. Anoter option would be to find a local staion that has a 100 octane pump.

 

thanks for all your help...

-marie

 

Actually the clogging of the cat is only a side problem.

The reason the older V-8 engines ran leaded fuel was because they hadn't at that time learned of hardnend valve seats. The primary concern was that the valves would sink in thier seats due to higher operation temp, thus also speeding wear.

A research and study was done by Chevron, and they concluded that unleaded gas will work fine in classic automobiles, as they are not subjected to the use and driving of days gone.

Some further information can be found by clicking here:
http://www.chevron.com/prodser...shtml

I know that this isn't an answer to the original question, but I saw a slight misinfo, and wanted to correct the situation.

Thanks,
Scott


Modified by CRneXt at 8:39 AM 3/6/2004