2000 Tran Zam

iTrader: (2)

i was gonna have allan tune my car on 91 and on c16 or whatever race fuel he uses. theres a local airport around here that i can get 100 low lead fuel from for 2.79 a gallon.

first question. is this octane with low lead feasable for what im looking to do, as far as a weekend/daily driver?

second. how much more power do you think id be able to gain from the difference in octane?

i guess theres a possibility it could foul out the o2's, but i heard bosch makes a lead resistant o2 sensor, so that could be an option.

thanks in advance.

smokinHawk

iTrader: (48)

low lead on airplane fuel still has a significant amount of lead, least thats what i hae been told, also it may contain some de-icers in it.
but not 100% sure, just repeating what has been discussed before.

i have those boshe O2s but havent used much leaded gas with them to see if they work like eveyone says. though the GN guys say they work well.

sr71

iTrader: (17)

I ran straight 100LL avgas ONCE in a roots blown prostreet car that I used to own. it would work fine mixed 50/50 with 93 pump. but, when I ran it straight, the car went nuclear. I shut it off when it got to 230 gegrees. I drained most of the avgas, poured some 93 pump in it, and it was fine. I don't know why it happened, but I always mixed it after that.

gator's 99TA

iTrader: (2)

aviation gas is NOT for street use. they rate the octane for the elevation airplanes run at. you dont. do a search its been talked before here.

2000 Tran Zam

iTrader: (2)

hmmm, ya most people seem to have trouble with it due to differences in rpms that ran compared to the planes, and difference in altitude.

some people did have good expereinces, but where changing out o2 sensors quite often. unless they make lead resistant o2's that work well, it prob wouldnt be worth even thinking about.

sb427f-car

If I'm not mistaken, one of the addatives they use in avfuel (jet fuel too) is acetone. It has a burnable property yet is resistant to freezing @ alt. I'd stick with Sunoco 98 or 100 if you can find it.

2000 Tran Zam

iTrader: (2)

i would, the only problem is, we only have like crappy *** 91 around here, some gas stations we have 100 unleaded, but its like over 5 bucks a gallon, so im just trying to see if its feesable to run the low leaded 100 oct since its less then 3 bucks.

smokinHawk

iTrader: (48)

get a methonal injection kit

2000 Tran Zam

iTrader: (2)

ya, i prob wont need meth, just cause of the tune i will be getting. i was just curious if i would have been able to run the 100LL all the time, substituting, the normal gas.

Pro Stock John

iTrader: (34)

What pcm management system are you using? To use leaded gas, you cannot be using stock 02 sensors.

2000 Tran Zam

iTrader: (2)

ill be on stock cpm with hp tuner 3 bar setup i believe.

sb427f-car

Outch, yeah, what smokin said.

sb427f-car

What about a dry gas octane boost? I'll ask Darkblue TA to take a look @ this later, one of his boy's in Texas had to use an alky or dry gas additive after some idiot filled up his Thumper setup with 93. Big no no.

White_Hawk

iTrader: (3)

I don't know about AV gas, but when I had my GN I used to run Turbo Blue 110 leaded all the time. It would mess up your sensor over time, though. As far as the turbo goes, though, no problem.

By about the 4th full tank, your car was tunning pig rich all the time. If you could put a speed density type tune on it, you might be able to make it work.

-Geoff

Pro Stock John

iTrader: (34)

I don't know the proper term for what happens, but leaded gas will coat or in my own words, lacquer up the o2 sensor. They become sluggish, and switch more slowly than what they were programmed for.

You could maybe do a HPT 2bar SD tune since you have a 2000 car and eliminate the MAF from the equation. I think that eliminates the 02 sensors too. The fueling would be referenced to the MAP sensor.

2000 Tran Zam

iTrader: (2)

ya, i spoke with allan yesterday. he said usually most people will use them on NA cars and have decent sucess with them, strokers with high comperssion. but FI and nitrous he receommend to try to stay away from it. which i am fine with because ill still have a tune for race fuel when i need it.

frcefed98

iTrader: (16)

Denso O2's are suppose to be a lil more resistant to lead...from what i've read here on the board. I bought a set for the turbo kit when some C16 or turbo blue gets pumped in for some dyno action, but I could be wrong about them. It was a while back that I read about them being a lil more resistant to lead.
J

dynedta

iTrader: (4)

john (admin) is exactly right, densos are alil better but not totally lead proof I run 75/25 turbo blue/93 mix and usually get about 8-12 months out of the densos, Ive also heard that over time leaded gas will eventually clog injectors Im not too sure if thats true but thats what ive heard.

Keith

Lead deposits will be all over the spark plug and o2 sensors. US GA pilots often deal with lead fouling when doing a run-up check. I have heard that AVgas has 4 times the lead that leaded gas of the past had.