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Old 10-02-2015, 12:42 PM   #15
Toyota86.ir
Mike Tune HKS E85 FD 4.88
 
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Originally Posted by go_a_way1 View Post
Vented hood, wrap your headers, make side vents, proper skid plate (beatrush makes one now) ummmm remove the crash bar if you want more flow (I would not do this but its an option) What intake do you have?

Grimmspeed
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Old 10-02-2015, 12:56 PM   #16
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Grimmspeed
That one looks fine for AIT's, well atleast as good as it can really get haha.
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Old 10-02-2015, 01:04 PM   #17
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That one looks fine for AIT's, well atleast as good as it can really get haha.
Mike tuned the car , after maf scale LTFT is 0.

I guess cooling will help but some days the car will not give you 100% impression.
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Old 10-02-2015, 07:51 PM   #18
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Originally Posted by Toyota86.ir View Post
Mike tuned the car , after maf scale LTFT is 0.

I guess cooling will help but some days the car will not give you 100% impression.
If your ltft is always 0 then i think your tuner has made car run in closed loop all the time and disabled ltft, you usually see ltft vary a couple of percent with temperature.

High under hood temp on NA cars are only realy an issue at very low speeds and stoped once your moving iat comes down quickly.
If much easier to make radiator fans run at low speeds ,table change in tune, to cool engine bay than messing with insulating intake and venting. although an easy vent is unclipping the plastic piece on the underside of the hood on the RHS of car above the overpipe.

oil coolers even the oem type are a good investment in hot climates if you drive hard as is a 5w30 or 10w30 oil depending on climate.

IAT temps higher than about 90F will start to pull timing ,but depends on tune

you need to look at FLKC fine learning knock control as well as iam to see if timing being pulled due knock.

for other compensations like iat and oil temp coolant temp you would need to look at tune tables .
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Old 10-03-2015, 02:36 AM   #19
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If your ltft is always 0 then i think your tuner has made car run in closed loop all the time and disabled ltft, you usually see ltft vary a couple of percent with temperature.

High under hood temp on NA cars are only realy an issue at very low speeds and stoped once your moving iat comes down quickly.
If much easier to make radiator fans run at low speeds ,table change in tune, to cool engine bay than messing with insulating intake and venting. although an easy vent is unclipping the plastic piece on the underside of the hood on the RHS of car above the overpipe.

oil coolers even the oem type are a good investment in hot climates if you drive hard as is a 5w30 or 10w30 oil depending on climate.

IAT temps higher than about 90F will start to pull timing ,but depends on tune

you need to look at FLKC fine learning knock control as well as iam to see if timing being pulled due knock.

for other compensations like iat and oil temp coolant temp you would need to look at tune tables .
the LTFT is not zero all the time and it vary between -1.8 to 1.8 in various condition.

i think starting fan at lower temp is better idea than vented hood for NA.

the iam all the time with E85 is 1.0
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Old 10-23-2015, 01:33 PM   #20
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Ideal gas laws and stoichiometry.
I think you are right
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Old 03-15-2016, 04:54 PM   #21
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Now i am sure the stoich is the key.
I like to know how ecutek calculate E85 stoich?
Air to fuel ratio is ratio of air mass(gr) to fuel mass(gr) and we know ethanol density is 789gr/litre but gasoline density vary in range 710-770 gr/litre.
I like to know ecutek gasoline density number?
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Old 03-15-2016, 06:40 PM   #22
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Originally Posted by Toyota86.ir View Post
Now i am sure the stoich is the key.
I like to know how ecutek calculate E85 stoich?
Air to fuel ratio is ratio of air mass(gr) to fuel mass(gr) and we know ethanol density is 789gr/litre but gasoline density vary in range 710-770 gr/litre.
I like to know ecutek gasoline density number?
I dont think ecuteck does any thing fancy

The 02 sensor in car measures 02 and measures this in lamda.

The ECU then converts this to petrol AFR numbers

so lamda 1 is 14.7 AFR

when you run E85 nothing changes the 02 still measures amount of oxygen in exhaust gas and ecu still cinverts it to petrol aft so stoic for petrol and e85 is still lamda =1

the ecu still assumes your on petrol so it converts it to petrol afr of 14.7. But you on E85 so the actual amount of fuel to achieve lamda 1 on e85 is 9.76.

It likely ecu does everthing in lamda and then just converts\scales to petrol afr


here is conversion table
http://honda-tech.com/forced-inducti...chart-3014051/

Last edited by steve99; 03-15-2016 at 06:59 PM.
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Old 03-15-2016, 06:50 PM   #23
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You could change the parameter from AFR to lambda.

You could create a custom map to output the E85 AFR....
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Old 03-15-2016, 07:33 PM   #24
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You could change the parameter from AFR to lambda.

You could create a custom map to output the E85 AFR....
if he has racerom extension :-)
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Old 03-15-2016, 08:55 PM   #25
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Things to consider that affect power.


1 Gas quality, even if the pump says E85 it could be E60
2 HUMIDITY!!!! High Humidity will kill the power... These little 4bangers hate it..
3 Heat will knock some power off....
4 After market parts. Even if you already tuned it and then you add something it will throw off the tune....
5 And lastly lack of maintenance.... Dirty air filter, bad fuel,ect.


Good luck!! Happy hunting!!!
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Old 03-17-2016, 11:10 AM   #26
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Quote:
Originally Posted by steve99 View Post
I dont think ecuteck does any thing fancy

The 02 sensor in car measures 02 and measures this in lamda.

The ECU then converts this to petrol AFR numbers

so lamda 1 is 14.7 AFR

when you run E85 nothing changes the 02 still measures amount of oxygen in exhaust gas and ecu still cinverts it to petrol aft so stoic for petrol and e85 is still lamda =1

the ecu still assumes your on petrol so it converts it to petrol afr of 14.7. But you on E85 so the actual amount of fuel to achieve lamda 1 on e85 is 9.76.

It likely ecu does everthing in lamda and then just converts\scales to petrol afr


here is conversion table
http://honda-tech.com/forced-inducti...chart-3014051/
Air fuel is ratio of air mass to fuel mass .
In E85 85/15 is ratio of ethanol volume to gasoline volume and volume ratio differ from mass ratio.

For E85 calculation we need to know the density of gasoline.
I do not know ecutek use what number for gasoline density.
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Old 03-17-2016, 11:12 AM   #27
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Originally Posted by Kodename47 View Post
You could change the parameter from AFR to lambda.

You could create a custom map to output the E85 AFR....

I do not tune myself and i just like to know e85 calculation in ecutek
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Old 03-17-2016, 03:21 PM   #28
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I love it around sep/oct when the temp up here drops. I swear it feels like a good 20-30hp gain. I feel for you guys in Cali who see high temps nearly all year long.

No wonder so many of you go FI
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