The Potential-E85-Conversion-On-An-Internally-Stock Rb25 Thread

[NYTSKY]

I use a Magnafuel washable filter. Methanol/Ethanon compatible.

I tested the local Caltex last week and can confirm they are still supplying E75. Hence im sticking with the United stuff (E90).

[Rolls]

How easy is it to retune for a massive change eg E70 to E90, can you just do a rough across the board adjustment and accept it will be good enough, or does it really need to go on the dyno?

[scotty nm35]

How easy is it to retune for a massive change eg E70 to E90, can you just do a rough across the board adjustment and accept it will be good enough, or does it really need to go on the dyno?

I didn't find the change that severe although I only changed from the Southland Manildra e85, 1 afr on the wideband richer. I guess you could fiddle with injector size if you have a wideband, just run it a little rich just in case.

I did find extra power though when I tuned for Eflex, just wondering if the ethanol needs a little petrol kick to get it firing quicker in the chamber. As Trent has said, its like C16 straight from the pump, at $1L.

[NYTSKY]

Eflex is $1.22 FFS!

United $1.05.

[islade]

I recently got my car tuned by Gavin Wood

RB25 with GT3076 0.82 external 50mm gate.

Gav said he couldn't get more than 250kw at 1.1bar out of it safely. When I asked why, he said it's probably just because it's an older worn engine with alot of carbon buildup.

If I was to grab some big injectors and swap to E85, would that overcome this problem to a certain extent, and allow me to run more boost/timing to get more power out of the car, or would that just be asking for trouble?

Thanks guys!

[scotty nm35]

I recently got my car tuned by Gavin Wood

RB25 with GT3076 0.82 external 50mm gate.

Gav said he couldn't get more than 250kw at 1.1bar out of it safely. When I asked why, he said it's probably just because it's an older worn engine with alot of carbon buildup.

If I was to grab some big injectors and swap to E85, would that overcome this problem to a certain extent, and allow me to run more boost/timing to get more power out of the car, or would that just be asking for trouble?

Thanks guys!

It would only be asking for trouble if you upped the boost a heap, just filling with e85 and remapping the fuel would make the tune much safer as there is no chance of detonation, and the 30% extra fuel volume will cool the pistons more. I don't see a down side at all other than finding a local servo. Dual map it though if you can, just as a backup.

[Lithium]

Gav said he couldn't get more than 250kw at 1.1bar out of it safely. When I asked why, he said it's probably just because it's an older worn engine with alot of carbon buildup.

How old is old?? Mine is almost 200,000km and at 1.2bar it goes quite chirpily

[islade]

1993 GTST... No idea what real K's are but i'm guessing they are probably around that... I think he said adding more timing didn't seem to make a difference so there was no point?

What sorta power are you getting at 1.2bar?

[Lithium]

Might just be the dyno - last time I had mine on a rolling road it was around 284rwkw from memory, a few months ago.

[34GeeTeeTee]

POST FAIL.... Sorry guys, copy and paste went wrong!!!!!!!!!!!

Edited March 17, 2011 by 34GeeTeeTee

[joeyjoejoejuniorshabadoo]

250rwkw is not too far off for 1.1 bar...

from memory I had ~250 @ 1 bar with the 2835... but i never EVER ran 1 bar

shove 1.3 bar into it and you should see a substantial gain.

did gav try to add more boost, or just more timing @ 1.1 bar?

[Simon-S14]

1.5 bar or go home

[SimonR32]

250rwkw is not too far off for 1.1 bar...

from memory I had ~250 @ 1 bar with the 2835... but i never EVER ran 1 bar

shove 1.3 bar into it and you should see a substantial gain.

did gav try to add more boost, or just more timing @ 1.1 bar?

Listen to this man!

[HEKT1K]

Are you, SimonR32, the same guy as Simon-R32? lol

[Simon-S14]

haha no.. was just sayiong earlier todasy that our usernames are too confusing.. since i no longer have a 32 i have requested a username change.

[joeyjoejoejuniorshabadoo]

yeah, i've been confused a few times, these days i just look at their avatars

[islade]

My Profec B reads 17psi at peak, do y'all think I should just up it to 19? The car is 100% street driven, so it's not like it sits on full boost for a whole lap or something, if you know what i mean

[joeyjoejoejuniorshabadoo]

i run 19, with a spike of 21

[Trozzle]

God damnit I want to get tuned for E85 now!!!! I'm running a pissy 17psi (dropping to 16) on 98 I'd love to up it to 19psi on e85....stop bumping these damned threads! you're giving me bad ideas

[joeyjoejoejuniorshabadoo]

just do it princess