but that is another story.
What octane
Drifting
Joined: Jun 2013
Posts: 1,955
Likes: 340
From: Shell Point (Crawfordville) Florida
But it's your car, do what you want.
Last edited by mrlmd; Jun 25, 2016 at 04:56 PM.
Pro
Joined: Apr 2015
Posts: 502
Likes: 57
From: Prince George
It I simple if you know your compression ratio that will tell you the octane you need, and no putting high octane in a motor that does not require it will not make it run better, that being said in Canada Chevron has 94 no ethenol
Le Mans Master
Joined: Feb 2012
Posts: 6,644
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From: OK
Thread Starter
Intermediate
Joined: May 2016
Posts: 48
Likes: 0
From: Mississippi
Update... The tank was almost empty so i topped it off with 93 and a bottle of techron. Car seems to like that a lot better, I put about 30 miles on today and It ran a lot smoother and seem to have more power. It was a 101* here today, ran good and never got above 212* with a/c off.
Thanks everyone for the advice!
Any suggestions on powerball numbers, since you all did so well with the last question?
Thanks everyone for the advice!
Any suggestions on powerball numbers, since you all did so well with the last question?
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Intermediate
Joined: Jun 2016
Posts: 49
Likes: 1
From: Sacramento CA
Excuse my lack of knowledge on this, I'm still acclimating to the N/A world.. I understand why you run high octane gas, and I understand basic differences between Ethanol and unleaded pump gas. Why is everyone here so against ethanol? Does it mess up the fuel system?
I was wondering how desirable E85 conversions are for Corvettes? I love the idea of a cleaner, safer burning fuel which pumps out more power. And I don't care about filling up twice as often, its not a problem for me.
I was wondering how desirable E85 conversions are for Corvettes? I love the idea of a cleaner, safer burning fuel which pumps out more power. And I don't care about filling up twice as often, its not a problem for me.
Acct Suspended APR 2026 by request
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2020 Corvette of the Year Finalist (performance mods)
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e85 itself does not make more power, it has a better ability to resist detonation which allows a tuner to add more timing to your tune and that's where the power comes in
Intermediate
Joined: Jun 2016
Posts: 49
Likes: 1
From: Sacramento CA
In FI applications, E85 allows you to run more boost and advance timing, so I guess its doubly desirable..
What I'm trying to get at is this- lets say you buy a 2015 wrx. 260hp or whatever on pump gas. If you buy an E85 map, without any additional bolt ons your wrx can make over 350hp. That is due to your timing advances and ability to run more boost.
In a C5, would the gains be similar? If we push 350hp on pump gas, could an E85 conversion get you to 400hp just by advancing your timing? Or is it a little more complicated than that?
Last edited by ramm21; Jun 27, 2016 at 02:37 PM.
Racer
Joined: Aug 2014
Posts: 400
Likes: 28
From: St. Paul (smokey!) MN
Excuse my lack of knowledge on this, I'm still acclimating to the N/A world.. I understand why you run high octane gas, and I understand basic differences between Ethanol and unleaded pump gas. Why is everyone here so against ethanol? Does it mess up the fuel system?
I was wondering how desirable E85 conversions are for Corvettes? I love the idea of a cleaner, safer burning fuel which pumps out more power. And I don't care about filling up twice as often, its not a problem for me.
I was wondering how desirable E85 conversions are for Corvettes? I love the idea of a cleaner, safer burning fuel which pumps out more power. And I don't care about filling up twice as often, its not a problem for me.
It also absorbs water and gums up/shellacks injectors and carbs. Ask a boat owner what he thinks of ethanol. Or the small engine repair guy who fixes lawn mowers and snow blowers after ethanol was not drained before off season storage.
I only have e10 available. It hadn't caused any problems yet but I am concerned. I don't drive mine much because I am out of town a lot, so it concerns me. If I could use real gas I would.
One question about e85 I've never seen answered: does tuning it for e85 make e10 or pure gas unusable? From what I read, the LS1 can reduce timing to run on 87, but wasn't really designed to use multiple fuel maps. I've only seen 1 tuner (I forget who) who claims to have updated an LS1 to support 2 fuel maps with full performance on both. Since e85 is scarce around me, I would not do it.
Racer
Joined: Aug 2014
Posts: 400
Likes: 28
From: St. Paul (smokey!) MN
A stupid question about techron: are there negative consequences for leaving techron in the tank for long term storage? From what I've read, most burn up the tank soon after putting it in.
My often sits unused for long periods. I always fill it before storing, I'm wondering if it is ok to put in a bottle when I fill it up next time I store it. It will probably sit on a battery tender for several months.
My often sits unused for long periods. I always fill it before storing, I'm wondering if it is ok to put in a bottle when I fill it up next time I store it. It will probably sit on a battery tender for several months.
Last edited by Lazarus Long; Jun 28, 2016 at 09:57 AM.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
A stupid question about techron: are there negative consequences for leaving techron in the tank for long term storage? From what I've read, most burn up the tank soon after putting it in.
My often sits unused for long periods. I always fill it before storing, I'm wondering if it is ok to put in a bottle when I fill it up next time I store it. It will probably sit on a battery tender for several months.
My often sits unused for long periods. I always fill it before storing, I'm wondering if it is ok to put in a bottle when I fill it up next time I store it. It will probably sit on a battery tender for several months.
Racer
Joined: Aug 2014
Posts: 400
Likes: 28
From: St. Paul (smokey!) MN
Acct Suspended APR 2026 by request
Joined: Dec 2010
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2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
One question about e85 I've never seen answered: does tuning it for e85 make e10 or pure gas unusable? From what I read, the LS1 can reduce timing to run on 87, but wasn't really designed to use multiple fuel maps. I've only seen 1 tuner (I forget who) who claims to have updated an LS1 to support 2 fuel maps with full performance on both. Since e85 is scarce around me, I would not do it.
Pro
Joined: Apr 2016
Posts: 552
Likes: 86
From: Philly area PA
My opinion on Octane is..........if you cant afford the 91/93/94 do not get a performance car. Why would anyone go against Manufactures recommendation on Octane, makes no sense?
Last edited by imjdoggie; Jun 28, 2016 at 12:57 PM.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
Honestly it's probably LESS than $200 per year for most C5 owners 
