Speedpro question

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ghostrider_85

New member
i know this is probably a really dumb question, but i wanna know for sure. where i live, i can get 116 leaded octane race fuel. my question is, will 116 LEADED fuel foul-up the o2 sensor (or any leaded fuel for that matter), therefore giving the speedpro a possible false reading? thanks
 
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ghostrider_85

New member
well, i thought lead wpuld be bad, but McCoy said it would be ok. but you and i both know about that rick, lol.

i'm going to get the truck today from the tranny shop, wish me luck, and best to you bud!

later
 
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LuvBoost

New member
You picking that bad boy up today :eek:??? I wanna go for a ride!! Let us know how the tranny is. Mine goes to Lucille's a week from Monday. That way it won't be tied up over a weekend. I hope...
 
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Xplicit Racing Design

New member
i was wondering this also, i found this while browsing the the turbo buick forums, Craig Smith actually works for speed pro/fast so im guessing he is somone you can rely on

"Has anyone had the Speed-Pro O2 sensor go bad from running race gas? The guy I bought the car from says he never ran anything higher than 100 unleaded for fear of ruining the O2. A friend of mine uses some of my Monte Carlo's 114 in his car while at the track and has a heated O2 with the factory ECM and is constantly going through O2 sensors. I just wondered what you guys have found as I don't really personally know anyone else running the Speed-Pro system"



Craig Smith
Over 99 billion served.
Registered: May 2001
Location: FAST World HQ
Posts: 305
We have had O2 sensors come back that are fouled out and no longer work, but never from lead. It's almost always oil or just blackened from being way too rich. Lance and I have never run anything other than leaded race fuel in our cars and haven't had a single problem. If your tuneup is good and you aren't blowing oil through the exhaust, I wouldn't worry about leaded fuel."
 
ghettosled

ghettosled

SYTY SUPERSTORE
I agree with Craig. We have run leaded gas through stock O2 sensors, the NGK sensors etc. and never really had a problem. If you are really worried then maybe race on the C16 and then put back in the unleaded to clean it out a bit. If it was a daily driver only drinking C16, then eventually it might die on you. I personally wouldnt worry about it. Even if you kill the O2, $350 is cheaper then $10k for a new motor. FOr WOT we usually let the truck run off the actual map, and not in closed loop. This will eliminate the worries of the O2 going bad and compensating incorrectly. For driving around the closed loop does help.
 
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smeagol

Active member
The FAST wideband 02's seem to have a good resistance to lead.

The stock Syty heated 02's seem to have *some* resistance to it, but still die.
 
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ghostrider_85

New member
Brian-

well, i do have access to 106 unleaded, but do you think we should tune it at the Nationals on the 106 unleaded, or the 116 leaded? :-?
 
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TheObiJuan

Active member
how do the 50#'s put up to c16. do they get clogged easily with say 5 gallons c16 and 4 gallons 92 octane?? plus some propane injection.
 
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smeagol

Active member
Race gas doesn't clog injectors.

50s aren't any different than other injectors when it comes to clogging.

Propane injection shouldn't bother them if you aren't putting the propane through the injectors or freezing them.
 
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