E85 vs e98 fuel percent increase?
Thread Starter
Joined: May 2011
Posts: 8,483
Likes: 1,026
From: Wichita, KS
Really don't think they are that big of a deal... *if* you know what your doing. I don't! 
Still too new at it all. But if you look at Chris Bishir's S-10, he won drag week with an 8.50 average at 160+ in a 3200lb s10. Then turned it up and went 8.3x on the last day. He held the 5.3 SBE record for awhile on that pass. SBE cam only with pump e85. No water meth etc... Twin out of the box S366's. No intercooler.
He told me he was over 250* at the 1/8th. Just needed to have the car tuned properly to deal with the charge temps. It clearly was reliable and making impressive power. Several other hot air guys state the same. They just ignore IAT and go by plugs.
I'm wondering if S366's have more potential than the entry level 78/75's. I have to be missing something on my setup... to many others have run a lot better without an IC at heavier weights. Def not saying E98 is the answer... But i'm out of ideas at this point.
Still too new at it all. But if you look at Chris Bishir's S-10, he won drag week with an 8.50 average at 160+ in a 3200lb s10. Then turned it up and went 8.3x on the last day. He held the 5.3 SBE record for awhile on that pass. SBE cam only with pump e85. No water meth etc... Twin out of the box S366's. No intercooler.He told me he was over 250* at the 1/8th. Just needed to have the car tuned properly to deal with the charge temps. It clearly was reliable and making impressive power. Several other hot air guys state the same. They just ignore IAT and go by plugs.
I'm wondering if S366's have more potential than the entry level 78/75's. I have to be missing something on my setup... to many others have run a lot better without an IC at heavier weights. Def not saying E98 is the answer... But i'm out of ideas at this point.
7 Second Club
Joined: Apr 2015
Posts: 692
Likes: 149
I think e98 would be worth a shot on a hot air setup even thow you don’t need more octane you could use the extra alcohol for cooling the cylinders even if it doesn’t pick up a ton of power it should still be safer for a hot air car
If you're still using MS3, you can open the flex setting and look at how it handles the information from the flex sensor. The percentage is listed for 0, and 100%. Should be fairly simple math from there. If you're not using a content sensor, it would be worth it to have. It works very well, just blending off the sensor. But you can use blended tables as well. After getting in the ball park you can lock it out if you choose. Or leave it operable to easily go back and forth between 98, and 85, or the lesser pump blends in winter.
Thread Starter
Joined: May 2011
Posts: 8,483
Likes: 1,026
From: Wichita, KS
If you're still using MS3, you can open the flex setting and look at how it handles the information from the flex sensor. The percentage is listed for 0, and 100%. Should be fairly simple math from there. If you're not using a content sensor, it would be worth it to have. It works very well, just blending off the sensor. But you can use blended tables as well. After getting in the ball park you can lock it out if you choose. Or leave it operable to easily go back and forth between 98, and 85, or the lesser pump blends in winter.
Really don't think they are that big of a deal... *if* you know what your doing. I don't! Still too new at it all. But if you look at Chris Bishir's S-10, he won drag week with an 8.50 average at 160+ in a 3200lb s10. Then turned it up and went 8.3x on the last day. He held the 5.3 SBE record for awhile on that pass. SBE cam only with pump e85. No water meth etc... Twin out of the box S366's. No intercooler.
He told me he was over 250* at the 1/8th. Just needed to have the car tuned properly to deal with the charge temps. It clearly was reliable and making impressive power. Several other hot air guys state the same. They just ignore IAT and go by plugs.
I'm wondering if S366's have more potential than the entry level 78/75's. I have to be missing something on my setup... to many others have run a lot better without an IC at heavier weights. Def not saying E98 is the answer... But i'm out of ideas at this point.
https://www.youtube.com/watch?v=ApCoqgyMA-k
Still too new at it all. But if you look at Chris Bishir's S-10, he won drag week with an 8.50 average at 160+ in a 3200lb s10. Then turned it up and went 8.3x on the last day. He held the 5.3 SBE record for awhile on that pass. SBE cam only with pump e85. No water meth etc... Twin out of the box S366's. No intercooler.He told me he was over 250* at the 1/8th. Just needed to have the car tuned properly to deal with the charge temps. It clearly was reliable and making impressive power. Several other hot air guys state the same. They just ignore IAT and go by plugs.
I'm wondering if S366's have more potential than the entry level 78/75's. I have to be missing something on my setup... to many others have run a lot better without an IC at heavier weights. Def not saying E98 is the answer... But i'm out of ideas at this point.
https://www.youtube.com/watch?v=ApCoqgyMA-k
Thread Starter
Joined: May 2011
Posts: 8,483
Likes: 1,026
From: Wichita, KS
Just noticed Bishirs truck has dual rails for a dual fuel setup, with the larger E85 injectors being higher in the runner. Having switched to a blow thru setup the intake manifold stays a lot cooler than before, often well below ambient with the amount of E85 flowing through it, even condensating, dead cold after a pull. Hard to trust any IAT sensor in the runner post fuel but injecting the fuel as far away from the valve as you can certainly helps cooling.
My baby cam 5.3 advanced 2* with a 212/212 @ 112 spit out 190-195 on the same compression tool. It trapped 159 intercooled at 24lbs with an S476 @ 3200lbs. I just can't figure why this one is such a turd.
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Launching!
Joined: Jan 2011
Posts: 202
Likes: 5
From: chicago
I changed to e85 . Simple change ur stoich to 9.7 and twick from there. Couldn't believe how easy it was. Look it up.
And by the way im non cooler also. E85 runs so cool u literally don't have to worry about IATs. I was in the 250ish and higher all the time when wot.
When i had my f-2 30lbs boost.
And by the way im non cooler also. E85 runs so cool u literally don't have to worry about IATs. I was in the 250ish and higher all the time when wot.
When i had my f-2 30lbs boost.
Thread Starter
Joined: May 2011
Posts: 8,483
Likes: 1,026
From: Wichita, KS
I changed to e85 . Simple change ur stoich to 9.7 and twick from there. Couldn't believe how easy it was. Look it up.
And by the way im non cooler also. E85 runs so cool u literally don't have to worry about IATs. I was in the 250ish and higher all the time when wot.
When i had my f-2 30lbs boost.
And by the way im non cooler also. E85 runs so cool u literally don't have to worry about IATs. I was in the 250ish and higher all the time when wot.
When i had my f-2 30lbs boost.
Launching!
Joined: Jan 2011
Posts: 202
Likes: 5
From: chicago
That’s not how you alter the fueling on my ECU. Car is already tuned on E85… I can add or subtract a percentage form the maps, so far I’ve heard a pretty wide range. Local friend says it took 10% over his E85 tune to make it happy. He happens to be non intercooled as well. Prob give that a go and report back after. Good to har another is well over 250* without issue. What plug did you run?
Thread Starter
Joined: May 2011
Posts: 8,483
Likes: 1,026
From: Wichita, KS
Unfortunately, it depends. We’ll assume base fuel has 10% ethanol already in it.
If the pump “E85” Is really typical 70% ethanol you add about 32%. If its really 85% its more like 44%. And if its 98% ethanol its more like a 56% increase. But it will vary. Those numbers are all rounded up so go rich and tune down.
If the pump “E85” Is really typical 70% ethanol you add about 32%. If its really 85% its more like 44%. And if its 98% ethanol its more like a 56% increase. But it will vary. Those numbers are all rounded up so go rich and tune down.