Anyone Tried E85 With A Gtrs On Their Rb25 ?

[ARTZ]

My opinion, ethanol makes more power due to the lazy way it burns, right through the piston stroke, which in turn makes more torque. That's why you can pump so much timing in without going backwards or detonating. As the exhaust is cooler and less dense (less carbon?) it actually causes more lag than a petrol tune I have noticed.

i was reading something a few days ago where a guy had put e85 in his mildly tuned honda with factory engine mgnt, his friend had the same car with the same mods but on pulp so they raced. His friend got the jump on him by about a car length.. He caught him in second then pulled 2 car lengths in 3rd..

He monitored the car for a few weeks then gave up cause he didnt want to do damage or install a piggyback

i assumed it was cause it wasnt tuned, but maybe it has more to do with what your saying..but if its less dense why are egts rising?

[joeyjoejoejuniorshabadoo]

When fueltown southland first got e85 the moorabbin cib boys raced 2 divvy vans down the neppean hwy.. 1 on pulp and 1 on e85

e85 won

[wolverine]

When fueltown southland first got e85 the moorabbin cib boys raced 2 divvy vans down the neppean hwy.. 1 on pulp and 1 on e85

e85 won

Then had their vans confiscated and destroyed under anti-hooning laws??

[joeyjoejoejuniorshabadoo]

Errr "yes"

[joeyjoejoejuniorshabadoo]

Not to mention when I first put e85 in the tank, we gave the car a full pass without a retune and it made around 10kw more over the 98 pass directly beforehand

(this wasn't at status)

[Count Grantleyish]

At top end or above the PULP line (on dyno graph I mean).

[joeyjoejoejuniorshabadoo]

All the way

[discopotato03]

No its still in its box at the moment . I wouldn't mind giving EFlex a go in that car because it does so few miles that an exotic fuel wouldn't be a problem . It has 740s a Z32 and PFC already , and a 33 GTR pump .

I'm wondering if EFlex and a bar of boost would give it the 250-260 RWKWs .

Also people keep asking about the mythical perfect RB25 turbo and they want to hang an RWKW number on it . Id prefer people to have an "adequate" performance level because a set number seems to bother them . If they get it their chuffed and if they don't they're crestfallen . The performance level could be great for them but its the number that worries them .

This is a personal hack formula and quite conservative , I think along the lines of 100Kw/Liter capacity being quite good ie RB20-200 RB25-250 and RB30-300 . Its not difficult to think that if you throw an extra 50 Kw at each engine size you possibly risk losing that nice bottom squirt road cars thrive on .

In the case of E70-E85 you can possibly get a bit without increasing the boost pressure and that most likely comes from more efficient combustion - timing set around best torque rather than best detonation protection on PULP .

The trouble with going larger than the 100Kw/L state of tune is that you begin to need larger turbine housings biased more towards high performance exhaust flow than lower engine speed boost response , and so an unhappy compromise starts to set in .

Typical examples might be say RB20+GTRS/RB25+GT3076R/RB30+GT3582R . Now you can come back on turbine housing size on all except the GTRS and unfortunately its the one you can't easily go larger on either .

Personally on my hack formula to not really lose anything but gain everywhere it looks more like RB20+GT2530/RB25+GTRS/RB30+GT3076R . Now as mentioned not much can be done with the GTRSs turbine housing aside from flange adapting a T28 flanged 0.86 housing but you can certainly use a 1.06 GT30 housing on an RB30 with a GT3076R .

With turbos its virtually always the hot side that causes all the grief , the cold sides by comparison are generally easy . 16yrs ago I wanted T3 flanged GT30 IW turbine housings , now they are here but now I want them twin scroll and IW . I still want that 60mm NS111 turbine in 76 trim and I'm off to another board to chase more on them .

A .