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#41
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An 8 degree drop in ambient temps (mid 80’s from mid 90’s) will have more of an effect than you think. Take a drive in the evenings when the temps get into the high 70’s…… you may be surprised at how much cooler your engine will run.
My point is you may simply be running cooler because it is cooler(by fl standards)!
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
The Following User Says Thank You to mchell For This Useful Post: | ||
#42
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Karl |
#43
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64 GTO 455 Tri Power Sunfire Red |
#44
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You are correct, the higher humidity does add a small margin of octane tolerance. Basically water in the air lowers the octane required for a given engine. There is a formula for it. It's something like 1 gram of water equals .25 octane reduction. Don't quote me on that but it's something close to it. We lived in Ohio (grew up there) so very familiar with high humidity and dew points. I wasn't pushing the pump gas too much back then. Most I had that I was driving was 10.5:1 with iron heads and we had 94 octane available to us at that time. That all worked perfectly fine. I've always been an advocate of making sure the engines run cool though. I think living out there I was hotter in the car than the engines were, lol. Another thing I prefer, all these cars have fresh air intake setups (IE: factory hoods and air cleaners that draw in outside air) and I monitor inlet air temps on two of them. Cooler inlet temps help this situation as well, and if living in a humid environment referring to your question, it might even be more of a player. |
#45
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my electric fans come on around 195 and car never gets over 200, but i drive under ideal conditions - cool nights on country back roads without any traffic at all.
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#46
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We don't get to pick conditions. Most of the time it's just sunshine and hot here. Cools off at night but we usually aren't running around that much late evenings. So it's critical for us that the cars work well no matter what it's doing outside.
It is nice this time of year though as temps now are starting to come down, getting into the really nice time of year. |
#47
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Edelbrock used to have water injection kits, Vari-Jection, in the 80s, to help ward off det. They worked. To a degree.
Meth kits are all over the place now, mostly boost people use them. .
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. 1970 GTO Judge Tribute Pro-Tour Project 535 IA2 http://forums.maxperformanceinc.com/...d.php?t=760624 1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car https://forums.maxperformanceinc.com...ght=procharger Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be |
#48
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Yep. I put one on my GTO when the 100 octane leaded disappeared from the Sonoco station. It worked pretty good. Used to run windshield washer fluid in it to get a little alcohol too. That and some Vortex octane booster.
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