use of unleaded fuel in a classic stang
10-27-2006, 05:33 AM
#1
2nd Gear Member
Thread Starter
Join Date: Aug 2006
Posts: 218
use of unleaded fuel in a classic stang
Hi,
Out here they suggest that we use higher octane gas for our V8s. I was told before that older cars needed lead in their fuel. Is that true? And if so, what would happen if you ran high octane (95 - 97 is the rating for high octane here) unleaded on a car with no catalytic? Will it foul up the valves?
What needs to be done?
Also there is an old regular fuel (leaded 93 octane rating) would that be better?
Out here they suggest that we use higher octane gas for our V8s. I was told before that older cars needed lead in their fuel. Is that true? And if so, what would happen if you ran high octane (95 - 97 is the rating for high octane here) unleaded on a car with no catalytic? Will it foul up the valves?
What needs to be done?
Also there is an old regular fuel (leaded 93 octane rating) would that be better?
10-27-2006, 05:38 AM
#2
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Join Date: Sep 2006
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Posts: 329
RE: use of unleaded fuel in a classic stang
hmm i didnt know they sell 95-97 octance....i know they have the norm 87 89 91 some states have 90 (bullhead city, az) and high octane of 105.....and i think 101 ?
im also interested in what answers will follow
im also interested in what answers will follow
10-27-2006, 05:38 AM
#3
Yukon Cornelius
Join Date: Oct 2005
Location: deep in the heart of dixie GEORGIA
Posts: 11,808
RE: use of unleaded fuel in a classic stang
the early model engine required lead to lubricate the valves and to aid in there cooling. but since lead is a poison lots of the people use the lead substitute you can buy it at any auto parts store(some claim it causes the engine to gum then others say no) i never have run it in any of my vintage stangs and they have been fine. now if ur planning on an engine rebuild down the road just make sure the machine shop installs hardened valve seats then the use of leaded gas willbe completely put to rest
10-27-2006, 05:41 AM
#4
Yukon Cornelius
Join Date: Oct 2005
Location: deep in the heart of dixie GEORGIA
Posts: 11,808
RE: use of unleaded fuel in a classic stang
the new e85 has an octane rating of something like 115
just contains less potential energy than 100%gas (20% ive read) so if u dump 20% more fuel in the engine u can afford to have race compression but regular priced gas
just contains less potential energy than 100%gas (20% ive read) so if u dump 20% more fuel in the engine u can afford to have race compression but regular priced gas
10-27-2006, 05:45 AM
#5
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RE: use of unleaded fuel in a classic stang
ORIGINAL: rmodel65
the new e85 has an octane rating of something like 115 just contains less potential energy than 100%gas (20% ive read) so if u dump 20% more fuel in the engine u can afford to have race compression but regular priced gas
the new e85 has an octane rating of something like 115
just contains less potential energy than 100%gas (20% ive read) so if u dump 20% more fuel in the engine u can afford to have race compression but regular priced gas
10-27-2006, 05:49 AM
#6
Yukon Cornelius
Join Date: Oct 2005
Location: deep in the heart of dixie GEORGIA
Posts: 11,808
RE: use of unleaded fuel in a classic stang
yeah hot rod had an article a while back if u have back issues it gives info on how to mod the carb so it dumps the extra fuel. to bad we dont have e85 anywhere near me
cause i definitely would put the closed chamber heads on my cleve thatd give me 13.6:1 compression
cause i definitely would put the closed chamber heads on my cleve thatd give me 13.6:1 compression
10-27-2006, 05:53 AM
#7
2nd Gear Member
Thread Starter
Join Date: Aug 2006
Posts: 218
RE: use of unleaded fuel in a classic stang
ORIGINAL: ford65stang
hmm i didnt know they sell 95-97 octance....i know they have the norm 87 89 91 some states have 90 (bullhead city, az) and high octane of 105.....and i think 101 ?
im also interested in what answers will follow
hmm i didnt know they sell 95-97 octance....i know they have the norm 87 89 91 some states have 90 (bullhead city, az) and high octane of 105.....and i think 101 ?
im also interested in what answers will follow
10-27-2006, 06:04 AM
#10
4th Gear Member
Join Date: Jun 2006
Location: Eke, Belgium
Posts: 1,264
RE: use of unleaded fuel in a classic stang
those octane rating are bull****, in the netherlands i use 98 ron, no addtive, but octane is all about marketing I have heared that modern unleaded has different lubricants and is much cleaner than the old days so the lead addtive is unnecessary see http://en.wikipedia.org/wiki/Octane_rating