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E85 For R35

LSX-438

By LSX-438,
in R35 GTR

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  • 3 weeks later...
handbrake Veteran

handbrake

Posted
Posted

what do people know about the various mixes of e85 from the different companies? I get the green 'sucrogen' stuff and at about 2.50/L it aint cheap. it apparently has the most consisent and best mix of ethanol with high octane petroleum. for instance, the castrol product is note as high an octane rating??

I understand some varieties of e85 have lower octane mixes which could be nasty on certain tunes.

Duncan Grand Master

Duncan

Posted
Posted

yeah there is a wide variety in the currently available mixes. If you have tuned it aggresively I would stick to the same stuff it was tuned for. But for my use a less aggressive tune and $1/l is more important that a little more power at $2.5+/l. It is still cheap compared to most race fuels though

LSX-438 Mentor

LSX-438

Posted
  • Author
Posted
what do people know about the various mixes of e85 from the different companies? I get the green 'sucrogen' stuff and at about 2.50/L it aint cheap. it apparently has the most consisent and best mix of ethanol with high octane petroleum. for instance, the castrol product is note as high an octane rating??

I understand some varieties of e85 have lower octane mixes which could be nasty on certain tunes.

I would be interested to know what the new caltex pump e85 is supposed to be like

The stuff at Rozelle (United, on pump) seems to have been pretty consistent for me over the last few months.

SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted

i use the Manildra made Powerplus E85 - high octane rating than the United CSR, definitely a better fuel - had to tweak the tune between the two, same for a mate of mine as well. Tuner said on both cars, the Manildra one was better.

Martin, just have a question if you don't mind. Have you even done a teardown on an E85 run engine yet?? Curious to know if there has been anything out of the ordinary etc

and what oil do you use again?

GTScotT Grand Master

GTScotT

Posted
Posted

2 things I have learnt recently with E85 that you guys might like to know.

E85 has a particularly short shelf life. Unfortunately I cannot recal the exact figures or terms yet within weeks the mixture sepparates and the fuel goes off. You will have a drum with 2 compounds completely sepperate from eachother, sort of like oil floating on water.

This would be relevant to storing the fuel in drums..

The other issue with this is that the fuel is prone to absorbing water, if left to sit for a while the breather on your tank can absorb enough water over the coarse of a few weeks to have your next turn of the key pump straight water through your rail.

Issue 2; more so an interest thing rather than a precaution. The points for max torque on a lean mixture vs a rich mixture are very wide. I believe the people running FAT injectors are generally going for the rich max for peak torque yet there is also a point on the opposite end of the spectrum where combustion temps and detonation arent an issue.

This could see us using much smaller injectors if this theory was explored a little more in depth.

Food for thought.

SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted
My 25 was pulled down about a week ago. Everything was alot cleaner than an unleaded run engine. Only had a slight dark grey powder on top of the pistons which i could wipe off.

Bearings were perfect.

how many k's did you do on the 25 with E85? much track time?

and mind if i ask what oil you were using?

twinvl Contributor

twinvl

Posted
Posted

Hmmm intresting comments.

I've seen e85 stored for months in steel drums with out a problem. The trick is to keep it sealed as yes it does soak up moisture very quickly if left unsealed.

I also know a guy who tested the ethanol content of e85 from various sources at various times and it varied from a bit over 85% down to 60%... Not so good. The best bet is to buy e100 in drums, still only $1 per litre, and mix it yourself, or run it straight!

BTW, i hope to be tuning an R35 in a month or so, and i'll definatly be suggesting to use E85. I'll let you know how it goes!

SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted

maybe contact Manildra bout that Steve.

The Fueltown servo here in Melb that has the manildra E85 has E100 available in drums as some customers are mixing their own.

I'm not sure if Fueltown gets E85 delivered or just mixes their own with E100 deliveries.

yeah, the E% can vary quite a bit, 60 - 92% apparently, but i don't know if that applies here in Oz though, i reckon between CSR and Manildra, you're going to get at least 85, pretty sure i got an assurance from the fueltown guy bout that

Marko R1 Grand Master

Marko R1

Posted
Posted
I run my R34 GTR on E85 and we make 940hp on 37psi. On 98 octane we made just under 600hp on 23psi.

We are also tuning a customers R35 GTR on E85 in the coming weeks, so I will be sure to post up the results!

what a massive gain!

what turbo setup u running?

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