Jump to content
SAU Community

Recommended Posts

Your missing the point. A car wil get as much as a 40kw increase by switching to e85 over premium.

Im not fighting the fact that it is an enviro fuel. All im saying is the prformance benefits are quite large. So if you think tyres is what make horsepower in an engne than thats fine. Id rather beleive what my figures say than someones press release.

pretty sure atmo's only gain about half that figure, Willalls have proven that from memory

  • Replies 46
  • Created
  • Last Reply

Top Posters In This Topic

Your missing the point. A car wil get as much as a 40kw increase by switching to e85 over premium.

Im not fighting the fact that it is an enviro fuel. All im saying is the prformance benefits are quite large. So if you think tyres is what make horsepower in an engne than thats fine. Id rather beleive what my figures say than someones press release.

LOL I wasn't arguing that it is an envirofuel. You said I was wrong about it being an ecological descision to switch to E85 for the V8 supercars!!!!!

I'm not doubting your expertise in the field of racing. All I've stated is the average JC ( who may drive a mazda 3) is not going to see the performance benefit when it's completely negated by the economy of running it. The General Public don't care if YOU or the minority get a 20%-30% performance boost. I think E85 needs to be a lot cheaper per litre before it gains acceptance by the GP.

99.9 cents all day everyday at the United down Tapleys hill road, is that cheap enough? But somehow i dont see someone in a Mazda 3 switching to e85 for the performance benefit, it really isnt a performance car, i mean the thing probably makes 50kw straight out the factory. The only time they will use it in that sort of car is if it came prepared from factory as a Flex fuel vehicle.

The advantages in a high performance car are clear, the cooling benefit, the high octane reading allowing for engines to run leaner without detonation, smoother idle, less break up on top end and then added horsepower increase.

Edited by Adelaideprosound
pretty sure atmo's only gain about half that figure, Willalls have proven that from memory

I did state AS MUCH AS 40kw, i didnt say they gain that amount. Mine gained 20KW without the tune just replacing fuel and injectors, and with tune went up about 40kw.

If you want to build your N/A engine to run E85 then you can get the big increases seen in the forced induction engines as you can run a lot more static compression.

The problem that i find with E85 that was eluded to earlier is that it's performance qualities are not guaranteed (well from the the servo's they aren't). You must remember that the street cars that are going to run E85 are "multi fuel" cars. These cars run a sensor in the tank to measure the ethanol content and these cars run anything from E10 to E90, as the ethanol content changes so does the mapping which won't happen in our tuned cars. Scorcher do guarantee the % so that is the only place that i will be getting my E85 from if i ever run it.

The best result i have seen is one of my brothers customers cars;

XR6T

PULP 370kw @ 20psi

E85 440kw @ 17psi

That's a 70kw gain running 3 psi less boost, gotta love that.

Edited by D_Stirls
I did state AS MUCH AS 40kw, i didnt say they gain that amount. Mine gained 20KW without the tune just replacing fuel and injectors, and with tune went up about 40kw.

I'd say N/A's dont gain as much as turbo's because they dont have the back pressure from the turbo holding in the heat which the fuel does a great job of cooling, I guess that goes for the inlet air aswell,

If the v8 stupercars could lift there compression then we would see some laptimes getting touched up.

If you want to build your N/A engine to run E85 then you can get the big increases seen in the forced induction engines as you can run a lot more static compression.

The problem that i find with E85 that was eluded to earlier is that it's performance qualities are not guaranteed (well from the the servo's they aren't). You must remember that the street cars that are going to run E85 are "multi fuel" cars. These cars run a sensor in the tank to measure the ethanol content and these cars run anything from E10 to E90, as the ethanol content changes so does the mapping which won't happen in our tuned cars. Scorcher do guarantee the % so that is the only place that i will be getting my E85 from if i ever run it.

The best result i have seen is one of my brothers customers cars;

XR6T

PULP 370kw @ 20psi

E85 440kw @ 17psi

That's a 70kw gain running 3 psi less boost, gotta love that.

Nice, the old henry's respond well to e85, I'd be interested to know how many more degree's went into it to make that figure, at a guess 15+ more than ULP.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Had a go at the stuck crush tube this afternoon. Tried things like grips and a chain wrench first but wouldn't just twist straight off. So got to work with a drill. Started small and kept a depth stop on to make sure I didn't drill into the bolt. Made a line of drill holes all the way up and enlarged them. Then a combination of chisel and Dremel to split it all the way up. Levered the split to get oil in there and eventually it gave a bit while levering. Worked it back and forth with loads more oil till it was spinning freely, then with grips I could work it downwards and off. And no significant damage to the bolt (not by me anyway - just the 27 years of rust)
    • Well, I'm tired. I'm tired because about 4PM yesterday, before today's appointment someone immediately bought my bumper. They couldn't get it any other day as they're on the way back to NSW. So I had to do that big GTR conversion I had been planning. Unfortunately, the information on SAU about what you need and how this is done is incomplete. So what should be a simple bolt on affair, yeah, it's not. Did you know if you use all GTR items the bonnet won't close? This little manuever sent me into about 1am the night before trying to dodge a way to get it closed. I will have to revisit this in the next few days  - or maybe not, I may let a body shop figure it out. It all needs to come up and my motivation to pull the bumper off is low. It also seems to hit things in the bay where the GTT bonnet didn't. Yes I used 100% new OEM GTR items. Today, I had the joy of driving to the dyno looking like this: Given I had roughed in the fuel and given sensible but pretty conservative timing, I didn't really bet on having the car drive out any real difference than when it drove in. Sadly due to a miscommunication and laptop fun and games (and almost bricking the dongle, prayers and firmware updates indeed), I ended up using HP Tuner credits to licence the car that was already licenced. So in the end my laptop was used. It turns out my butt dyno is still well calibrated after all this time. The 325kw was on 74% Ethanol, the 313kw line was on 98. The other line is the 'before' line which was 281kw. While the numbers are pretty low, they're pretty in line with what you'd expect. Even if US dynos bump the whole result up about 50KW, gaining 10-15% is similar gains.  The curve of the cam is pretty much spot on with what was discussed as well. All this said, it still feels bad to not see the number you secretly want to see. Even if the car drove great beforehand, and I knew pretty confidently the car would drive out much the same way it drove in due to the nature of a wellish dialled in LS1 not gaining much if anything at all from being tuned from where it was. As expected, the car isn't particularly sensitive to running it at anywhere between 12.0 and 13.0 - And the initial timing at 20deg and 12.0 made 308KW. So 3 degrees of timing, and leaning it out to 12.7 for 5kw, anything above stopped giving any benefit until E85 (which has an additional 2 deg as before). Car itself behaved entirely fine. I found out that 100C = 1.15V! IAT at about 7pm was 19C. I might mess with the bonnet mounting.. but given the REO NEEDS TO BE CHOPPED TO FIT A GTR BAR this is possibly something I may leave gathering (more) dust until it returns to paint jail.
    • It sounds farrrrrrr too cold at your place Duncan... Here I was thinking our 10 degrees overnight is getting cold...
    • oh yeah, reminded this morning....bin lids frozen shut too
    • In my case not, because of total reno. But yeah.
×
×
  • Create New...