Jump to content
SAU Community

Recommended Posts

R33GTR Vspec '98 RB31DETT 716hp/534kw 970nm at 20psi No injector left, HKS GTRS's, E85

E85 Steve!

that is rude!!! 534kw!! RB31 and GTRS's! just spastic....

is that 534awkw?

i would like to see a tear down of a motor after it's been running E85 for a while though.

Before i made the switch, we did a compression test just to make sure everything was ok, Trent @ Status said it was near perfect across all 6 - got a test done last week after about 18months on E85, 170,168,168,165,168,170 - don't know if that tells us much but my engine sure is still in tip top shape - i reckon the E85 has helped it stay in very good condition, oh and the tune of course :whistling:

  • Replies 91
  • Created
  • Last Reply

Top Posters In This Topic

Out of that report;

The E85 fuel is made to a world standard and 70-85 per cent ethanol.

I don't like the sound of the bit that's highlighted;

The Flex Fuel cars change their maps according to a sensor in the tank that tells the ECU what Ethanol content the current batch of fuel has.

We don't have that luxury, if we tune our cars on say E72 batch fuel and the next batch is E84 or vice-versa we'll have problems.

Just remember that the fuel in the main stream stations is designed for FLEX-FUEL cars; and they don't guarantee an Ethanol percentage as the cars it's designed for do need a set percentage, But we do.

I'll be getting mine for Scotchers when i swap over.

Edited by D_Stirls

I've tried lots of combinations of mixture's, e50-e85, tune doesnt change that much that you'll have to worry, does richen up a little the more 98 you run but does not make any difference to the knock protection ethanol offers, power drops off a little, I doubt you would notice you were running e70 once your idle settled!

Ill be sticking with united CSR.

Powerplus E85 is the best if you can get it.

We have 1 United and 1 Powerplus here. I've had tunes on both, as has joeyjoejoe, and both of us had to get Status to fiddle with the tunes (even though both are E85) but Trent said both times the Powerplus fuel was better. It has a slightly higher ROn rating as well.

Powerplus E85 is the best if you can get it.

We have 1 United and 1 Powerplus here. I've had tunes on both, as has joeyjoejoe, and both of us had to get Status to fiddle with the tunes (even though both are E85) but Trent said both times the Powerplus fuel was better. It has a slightly higher ROn rating as well.

Yeah we dont have Powerplus here, so for months now, the only available E85 on pump is Tapleys Hill Rd United. Other than that, Scotchers race fuel.

Powerplus E85 is the best if you can get it.

We have 1 United and 1 Powerplus here. I've had tunes on both, as has joeyjoejoe, and both of us had to get Status to fiddle with the tunes (even though both are E85) but Trent said both times the Powerplus fuel was better. It has a slightly higher ROn rating as well.

I'd like to play with this powerplus, maybe get some feedback on how it's going long term, I've had problems with filters blocking and pumps getting destroyed when running non CSR E85.

What are people doing about engine oil, is there anything specific that you would need to use? Also, I have heard mixed information about E85 being harder on valve guides and also water vaopur in exhausts.

I've tried lots of combinations of mixture's, e50-e85, tune doesnt change that much that you'll have to worry, does richen up a little the more 98 you run but does not make any difference to the knock protection ethanol offers, power drops off a little, I doubt you would notice you were running e70 once your idle settled!

Ill be sticking with united CSR.

Have you been able to check the difference between E50 and E85 on a dyno? Or is this just seat of the pants?

Light knock etc is very hard to notice at WOT

I tried 50% mix long time ago to try keep my injector duty down, didnt run back to back on dyno, but it was still making insane power on the dyno at 50%, noticed more on the rd, lost response mainly. I've never had any knock register (on the sensors anyway) running e50, e75 or e85, I havnt explored the timing limit's either. 5-7 degree's across the map works well for me! some start at 15 and go from there, I'm happy not to push my 14 year old engine beyond 600 ish rwhp :)

I tried 50% mix long time ago to try keep my injector duty down, didnt run back to back on dyno, but it was still making insane power on the dyno at 50%, noticed more on the rd, lost response mainly. I've never had any knock register (on the sensors anyway) running e50, e75 or e85, I havnt explored the timing limit's either. 5-7 degree's across the map works well for me! some start at 15 and go from there, I'm happy not to push my 14 year old engine beyond 600 ish rwhp :)

pfffft whats wrong with ya mate. go for 750rwhp that where its at ;)

re: oil - 'apparently' the full ester oils like 300V chrono etc are not recommended with E85 - Motul is meant to be having a compatible oil, but not release for a while.

Gulf Western's GRoup V oil says it's ok to use with Ethanol... so i don't know what the go is.

For the time being, i go with the Yank oils, Royal Purple or AMSoil (what i've currently been running, 10w40) as i know they're ok with ethanol. They've had ethanol for longer, so i'm sticking with US products so far.

If we had some Brazilian contacts, we could probably get everything answered :(

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

    • My thinking is that if the O2 sensor is shot then your entire above described experience is pure placebo.
    • Here is the mess that I made. That filler there was successful in filling dents in that area. But in the middle area. I can feel dents. And I've gone ocer it multiple times with filler. And the filler is no longer there because i accidently sanded it away. I've chased my tail on this job but this is something else lol. So I'm gonna attempt filler one more time and if it doesn't work I'll just high fill primer the door and see where the issues are because guidecoat is of no use atm.
    • Ok, so I think I sort of figured out where I went wrong. So I definitely overthinked it, and I over sanded, which is probably a large part of the problem. to fix it, I ended up tapping some spots that were likely to be high, made them low, filled them in, and I tackled small sections at a time, and it feels a lot better.    I think what confused me as well is you have the bare metal, and some spots darker and some are lighter, and when I run my finger across it, it' would feel like it's a low spot, but I think it's just a transition in different texture from metal to body filler.    When your finger's sliding on the body filler, and crosses over to the bare metal, going back and forth, it feels like it's a low spot. So I kept putting filler there and sanding, but I think it was just a transition in texture, nothing to do with the low or high spot. But the panel's feels a lot better, and I'm just going to end up priming it, and then I'll block it after with guide coat.   Ended up wasting just about all of my filler on this damn door lol  
    • -10 is plenty for running to an oil cooler. When you look at oil feeds, like power steering feeds, they're much smaller, and then just a larger hose size to move volume in less pressure. No need for -12. Even on the race cars, like Duncans, and endurance cars, most of them are all running -10 and everything works perfectly fine, temps are under control, and there's no restrictions.
    • Update: O2 sensor in my downpipe turned out to be faulty when I plugged in to the Haltech software. Was getting a "open circuit" warning. Tons of carbon buildup on it, probably from when I was running rich for a while before getting it corrected. Replaced with new unit and test drove again. The shuffle still happens, albeit far less now. I am not able to replicate it as reliably and it no longer happens at the same RPM levels as before. The only time I was able to hear it was in 5th going uphill and another time in 5th where there was no noticeable incline but applying more throttle first sped it up and then cleared it. Then once in 4th when I slightly lifted the throttle going over a bump but cleared right after. My understanding is that with the O2 sensor out, the ECU relies entirely on the MAP tune and isn't able to make its small adjustments based on the sensors reading. All in all, a big improvement, though not the silver bullet. Will try validating the actuators are set up correctly, and potentially setting up shop time to tune the boost controller on closed loop rather than the open loop it is set to now. Think if it's set up on closed loop to take the O2 reading, that should deal with these last bits. Will try to update again as I go. 
×
×
  • Create New...