Stagea & E85 Tunes

[CruisingFast]

Hi Guys,

Just out of curiosity has anyone gone down the E85 road with there Stagea?

I'm looking at doing this and was wanting to know if anyone else has gone down this path. I'm curious to know what kind of power you are getting, what ecu you have and what size fuel pump and injectors you're running.

I've already got 660cc injectors though given some recent purchases these will need to be swapped out, I was thinking of getting 1000cc but wasn't sure if this would be overkill. I believe I have a Nismo fuel pump but have heard of people using dual fuel pumps to run this stuff.

If anyone knows someone in the Brisbane area that I could talk to, offer some advice in this area that would be great. Looking for someone with E85 tuning experience and an upgrade on my ecu which is currently the Apexi power fc. Some people have said to go Haltech but I used to hear some bad stories about these a few years back... if anyone has experience with this please share. I'm just looking to build something reliable and with dual fuel map type setup.

I'm getting my motor built at the moment and will be looking at fuel upgrades/ecu once I have the package together.... if you can tell from what I'm putting together down below maybe you could tell me if I'm on the right track? (1000cc 2 X Nismo fuel pumps+ Haltech??)

rb26 bottom end. block chemicaly cleaned, bored 40thou, crack tested, new welsh plugs, de-burred. r33 crank cryo frozen for strength, balanced, crack tested, micro polished. new n1 oil pump and water pump. new oil squiters in block, new nitto H beam rods, cp 40thou pistons, nismo bearings. full arp head and main stud kit, tomei oil restrictor.

Getting the head of my current car chemically cleaned and crack tested, some minor head work including TOMEI Camshafts Poncam RB26DETT 9163 Type B (9.15 lift 260 degree), TOMEI Valve Springs Set Type-B RB26DETT 9784 & TOMEI Metal Gasket Combination Set RB26DETT 13436.

I have the HKS660C injectors, HKS-GT-SS turbos and am fittin up a HKS Type R intercooler 600x300x100 and hard piping kit, HKS dumps, Apexi front pipe and Kakimoto N1 Full Mega exhaust.

[ironpaw]

Posted in the wrong place?

My Stagea is tuned for E85 but its a M35...

[CruisingFast]

Posted in the wrong place?

My Stagea is tuned for E85 but its a M35...

Yeah I thought I posted this in the Stagea page... maybe it was moved???

But i guess this is as good a place to get some advice, i remember reading up on Guiltoy's tuning experience somewhere in this forum. That was a while ago now and was curious to know what other people are doing.

[KiwiRS4T]

Just read the GUilt Toy on E85 thread above. Your engine is no different to a GTR.

[DVS JEZ]

Keep the power fc. Will yeild the same Results.

[CruisingFast]

I didn't think the power fc were as good as its only a single rom, I thought some of the newer ecu's made it easier to tune and could support multiple fuel maps which would be changed easily depending on whats available at the pump. So green with this, what about the injectors/fuel pump...

I'm trying to sell my GT-SS if I can get something reasonable to upgrade to the GT-RS... just not sure if this is a good idea with everything else getting done with a single pump and 660c injectors... hence I might leave turbo as is and just do the E85 tune and see where I'm at then and maybe upgrade to something still streetable but bigger than the turbos I have now.

I want to keep my low mount setup as I'm approaching the point where I need to stop spending or risk losing something a little more personal from an angry girlfriend. She wasn't happy when I told her I just spent 12K, the same 12K that could've bought her a diamond ring apparently... pfft.. turbos or rocks? What the hell was she thinking????

[R31Nismoid]

I think going GT-RS is a bad decision. If you need to upgrade turbos, get -5s at the maximum. I think Piggaz will no doubt give you a nicer insight if he see's this thread as even with 2.8l, his GT-RS setup is extremely laggy.

-5s are noticeably laggier than GT-SS (-9), but will make more power.

I've just done a similar swap from -9 to -5... Personally I'd not do it again given a second chance as just general driving around the response was amazing.

That said -5s certainly come into their own above 150km/h but forget it below that as you have to ring the cars neck to makeup the difference.

If you go E85 on the -9/GT-SS's you should be able to make around 360rwkw, maybe 370rwkw which is what -5s do on PULP.

This would certainly be the best of both worlds where you get response (and added response again with E85) and the higher top end.

[CruisingFast]

I think going GT-RS is a bad decision. If you need to upgrade turbos, get -5s at the maximum. I think Piggaz will no doubt give you a nicer insight if he see's this thread as even with 2.8l, his GT-RS setup is extremely laggy.

-5s are noticeably laggier than GT-SS (-9), but will make more power.

I've just done a similar swap from -9 to -5... Personally I'd not do it again given a second chance as just general driving around the response was amazing.

That said -5s certainly come into their own above 150km/h but forget it below that as you have to ring the cars neck to makeup the difference.

If you go E85 on the -9/GT-SS's you should be able to make around 360rwkw, maybe 370rwkw which is what -5s do on PULP.

This would certainly be the best of both worlds where you get response (and added response again with E85) and the higher top end.

hmm I'm hearing what your saying about the turbo lag... this is definably something I want to stay away from... I guess I'll just keep the GT-SS as these are really good down low and come on quick which is perfect for the street... I guess I was just getting ahead of myself as I was thinking these turbos would be a waste on the engine that I'm putting together. I don't care solely about power but I've got a number in my head and I'm looking for something greater than 350kw at the wheels which is what got me thinking of upgrading the turbos... the other thing that was playing on my mind is if the engine can handle more boost, at what point can the GT-SS goto as I want a reliable setup and not have the turbos under stress if I'm pushing them past there limits.

[R31Nismoid]

I'll say this first - before i waffle so you don't have to read the rest if you don't want too.

But it comes down to you mate, and what you want.

I'd suggest getting into a car with -5s and 20psi (370-380rwkw), and 20psi with -9s (320-330rwkw) and then make your own decision. Yes some setups make more, more boost etc. Im just talking "general/broadly above".

20-22psi is about the most you can hold to 7500-8000rpm from -9s and it seems around 330rwkw and that's the absolute limits.

If i recall correct one person i think made 360rwkw on 26psi, but to the best of my knowledge that hasn't been repeated so it's hard to say if it was accurate.

Plus given the fact it was a lot more boost for not much more power - the turbos are pretty clearly on thier limits.

I have 2x built 26s at the moment:

HR31:

2x GT-SS's in 31.

GTR:

2x Custom turbos (similar to -9 in size for the sake of convo)

sold those and now have

2x -5s

Having had above setups I would never hesistate in saying get -9s or -7s.

For me personally the -5s are simly to laggy for the street. I do enjoy the "kick" when -5s come on boost and inbetween gear changes and i must admit i do giggle sometimes as it will occasionally turn the tyres.

But the fact is whilst it "feels" fast... It was quite noticeably less responsive inbetween gears/on-off throttle and so on as 90% of my driving is between 0-100km/h.

GTRs & Stags are heavy, you need as much as you can - as soon as you can IMO for a car that is street driven. It's the one thing I am struggling to adjust too as my HR31 is around 150-200kg's lighter and is noticeably more nimble when i swap between each car. Add to the fact it's RWD also, it doesn't understeer anywhere near as bad.

[CruisingFast]

Having had above setups I would never hesistate in saying get -9s or -7s.

Cheers Nismoid for the advice, I'm not exactly clever with these things and am still learning as I go. Just trying to get by without making too many mistakes along the way.

At the tisk of sounding like a complete dill, I went searching for -7s turbos but couldn't find anything . Is there a faq or something I could read to educate myself on what these sizings actually refer to so that I know what I'm looking at when I'm reading up on the different options I have.

Similarly if you know of some turbos that you could recommend at this size I could also read up on this. Happy to learn what I can, thanks again for taking the time in your posts.