What's wrong with superchargers?
#261
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The power gained from E85 is mainly in the timing however because theres more of it it also cools the combustion air further.
And yes it burns cooler. EGTs are about 200-250 degrees cooler than what you'd see with regular gasoline.
As far as requiring special **** to run E85.. The only thing not compatible in a miata is the injectors. The rest of everything holds up fine. You dont even need a special O2 sensor, just run the regular wideband and tune for 12-12.5 afr instead of 11.5 for boost, 13.5-14 for spool up at atmosphere, and 16-17 in cruise and you're golden.
After switching to E85 it's actually normal to see your entire exhaust turn golden color while all the black carbon build up strips away. And at last alcohol smells much tastier than the soot of gasoline.
And yes it burns cooler. EGTs are about 200-250 degrees cooler than what you'd see with regular gasoline.
As far as requiring special **** to run E85.. The only thing not compatible in a miata is the injectors. The rest of everything holds up fine. You dont even need a special O2 sensor, just run the regular wideband and tune for 12-12.5 afr instead of 11.5 for boost, 13.5-14 for spool up at atmosphere, and 16-17 in cruise and you're golden.
After switching to E85 it's actually normal to see your entire exhaust turn golden color while all the black carbon build up strips away. And at last alcohol smells much tastier than the soot of gasoline.
#262
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Some power gain is expected from switching to E85 on a NA engine, due to the higher energy content in the combustion.
( 81,800 BTU/Gal E85 / 9,8 AFR) / (114,000 BTU/Gal gasoline / 14,7 AFR) = 7,6%
Stated BTU/Gal for gasoline varies from 111.000 up to 114,500
Real life on non knock limited engines we've seen 0 to 10% gain.
Tommy
( 81,800 BTU/Gal E85 / 9,8 AFR) / (114,000 BTU/Gal gasoline / 14,7 AFR) = 7,6%
Stated BTU/Gal for gasoline varies from 111.000 up to 114,500
Real life on non knock limited engines we've seen 0 to 10% gain.
Tommy
#266
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Some power gain is expected from switching to E85 on a NA engine, due to the higher energy content in the combustion.
( 81,800 BTU/Gal E85 / 9,8 AFR) / (114,000 BTU/Gal gasoline / 14,7 AFR) = 7,6%
Stated BTU/Gal for gasoline varies from 111.000 up to 114,500
Real life on non knock limited engines we've seen 0 to 10% gain.
Tommy
( 81,800 BTU/Gal E85 / 9,8 AFR) / (114,000 BTU/Gal gasoline / 14,7 AFR) = 7,6%
Stated BTU/Gal for gasoline varies from 111.000 up to 114,500
Real life on non knock limited engines we've seen 0 to 10% gain.
Tommy
Ok I feel obligated to do this:
IF YOU DON'T HAVE PERSONAL EXPERIENCE USING/TUNING E85 PLEASE STFU AND DON'T POST ON THE SUBJECT.
KthxBi
#267
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Nope Pizza is right. It has a lower energy content per volume, but you need more of it. Look at the ******* numbers dumbass. He's showing e85 as having 30,000 less BTU/gal but you need a lot more of it, so it works out to having more total energy in the combustion chamber than normal gas. Chemistry.
#269
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Nope Pizza is right. It has a lower energy content per volume, but you need more of it. Look at the ******* numbers dumbass. He's showing e85 as having 30,000 less BTU/gal but you need a lot more of it, so it works out to having more total energy in the combustion chamber than normal gas. Chemistry.
You have proven your asshattery way too many times and not one single person on this forum actually takes your shitstained drivel as credible information because you're a ******* moron.
Get back in the kitchen bitch.
I dokn't know wtf you're trying to accomplish bringing afr into this.....You don't need a consistent 30% e85 to replicate gasoline consumption. Unless you're a internet "expert" and really think that its consistent like that and have never tuned a car on e85 before.
The energy content of 1.0 US gallon of ethanol is 76,100 BTU, not 81,800.
Tuning strategies are different for the 2 fuels, and only boosted applications or ones with ultra high compression really take advantage of e85. Not a stock low comp BP. I KNOW you won't back up this stupid *** claim that Leafy and yourself keep trying to make, but I'll let you try:
How about posting said charts you speak of showing a 10% gain in power on a BP motor with n/a bolt ons...internally stock?
We're talking about BP's here. N/a BP's to be specific. Don't be a bitch and speak "generally" like the idiot posting above you.
The motor flows like ***. And isn't high compression or has trick cams. It has nothing to push said extra amounts of e85 (vs gasoline) and air through itself and take advantage of running cooler in the process due to the larger amount of fuel being vaporized.
I have personally tested ramping up the timing to kingdom come on e85 on an n/a engine and the gain was something pathetic like 3hp.
Don't pull a Leafy.
Its the fastest way to losing credibility on here.
#272
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![rofl](https://www.miataturbo.net/images/smilies/rofl1.gif)
175-167=8
fail#1, dumbass
BUILD LIST:
ENGINE
2001 VVT engine with the following modifications:
MiataRoadster Phenolic intake manifold insulator
MiataRoadster Delrin motor mounts
Gates Racing timing and accessory belts
Gates Racing coolant hoses
ATI Super Damper crank pulley
K&N air filter
Motul Motorsport 300V 10W40 motor oil
Unorthodox Racing heatsink oil cap
Maruha Motors oil pan baffle
Engine Supply prepped cylinder head & bottom end Engine Supply gasket-matched JDM NB2.5 "flat top" intake manifold lightened factory water pump pulley
stock internals hand-picked and lightened to match lightest component head shaved to factory minimum block decked to factory minimum
custom phenolic cold air intake box custom fiberglass and aluminum under-radiator air intake snorkel & air box
ENGINE
2001 VVT engine with the following modifications:
MiataRoadster Phenolic intake manifold insulator
MiataRoadster Delrin motor mounts
Gates Racing timing and accessory belts
Gates Racing coolant hoses
ATI Super Damper crank pulley
K&N air filter
Motul Motorsport 300V 10W40 motor oil
Unorthodox Racing heatsink oil cap
Maruha Motors oil pan baffle
Engine Supply prepped cylinder head & bottom end Engine Supply gasket-matched JDM NB2.5 "flat top" intake manifold lightened factory water pump pulley
stock internals hand-picked and lightened to match lightest component head shaved to factory minimum block decked to factory minimum
custom phenolic cold air intake box custom fiberglass and aluminum under-radiator air intake snorkel & air box