Dyno'd the 3.9 turbo on e85. Results

[Shaun41178(2)]

15.2 lbs of boost.

Peak HP at 5600.

Injector duty cycle near 95% at 6200 rpm running 830ccs at about a 56 psi base pressure

Timing above 5600 was increased from 15 degrees on 93 to 17 degrees on e85. 18 degrees netted less than 10 HP so dialed it back to 17.

Dyno on 93 was 13 lbs and 15 degrees timing.

E85 was a smidge over 15 as stated before and 17 degrees.

88 degrees and 80% humidity in Dyno cell.

Comparo between 93 and alcohol.

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[eHoward]

I don’t know much about e85 but pretty interesting how similar the curves are up to 4k or so and how the gas drops off in torque in comparison after there.

What are your goals for this car before you put the vortech in or are you looking for the other chassis to build that separately?

Congratulations on the big time numbers. That’s like twice the power of the typical v8 swap

[Shaun41178(2)]

I didn't get a printout of it nor a picture but on the first run where I hit 492 HP, I pulled up my 450 HP 93 run to compare and the e85 Dyno on spool up was significant.

If I remember correctly the first pull e85 was around 30lb ft more tq at like 3500 rpm over the 93. I didn't get a pic of it but maybe someone else did. But I looked at it and it was significant increase even down low. I think as the car got hotter the gains weren't there as much.

I'd like to keep this car turbo and find another one to do the supercharger setup in. But I'm not married to that idea. Swapping out the turbo is way cheaper than buying a second car

[pmbrunelle]

I am hoping e85 adds 20 hp by itself. Cooler, denser charge as well as being oxygenated usually gives a decent bump with boost by itself without timing being added.

I don’t know much about e85 but pretty interesting how similar the curves are up to 4k or so and how the gas drops off in torque in comparison after there.

So below 4k, the turbo is spooling up (not at maximum RPM yet), and therefore the compressor discharge temperature is not at its hottest.

If oxygenation of the fuel was a factor, I think it would apply throughout the RPM range.

However, there is only a difference above 4k, when the air temperature is at maximum. The cooling effect (and hence denser charge) of E85 could be the most important when the intake air is hot, and not so important for lower intake temperatures.

So, from what I see here, it looks like the cooling effect has a bigger role than the oxygenation effect.

[Shaun41178(2)]

https://youtu.be/1P0Mv1eHxX8

[ericjon262]

https://youtu.be/1P0Mv1eHxX8

did I miss it, or is the video missing the graph?

[Shaun41178(2)]

The graph is in this thread

[ericjon262]

The graph is in this thread

right, but you claim big numbers on the 'tube, and then only post them here where about 6 people see them. also, none of your graphs show 599 hp as your video claims.

[Shaun41178(2)]

599 BHP

[Shaun41178(2)]

I did a dragy pull tonight. It did ok but my log said I was running lean for some reason. Either way here are the results.

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[Shaun41178(2)]

Not sure how accurate this is but found it when searching for 60-130 times of stock and modified cars

I'd say it's relatively close.

[Shaun41178(2)]

I figured I would add this new dragy 60-130 in this thread since I already posted one beforem. I might have posted this already here but I don't know where if I did.

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And a 40-100 which some people also do.

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