Jump to content
SAU Community

Recommended Posts

  • Replies 50
  • Created
  • Last Reply

Top Posters In This Topic

340kw on -7's?!

It's possible on e85

They are supposed to make about the 310~320 mark on 98 at their absolute maximum (as in, probably shouldn't be running them that high)

On E85... 340 could be achievable but I don't know how maintainable it would be... Could be a happy dyno :P

Back on topic though... I would be interested in finding out how you find the -5's... I have -7's in my car from factory and I think one of them has busted an oil seal... blowing a lot of white smoke under heavy boost. I will be taking them out soon and checking them out and seeing if they are worth rebuilding or upgrading to a -9 or a -5

Heya R34 LINER,

I'm curious to know where did you get your info regarding the max power achievable with the -7s as there's a heap of variables involved!

Dyno was a DynoDynamics in Standard shootout mode (6F with standard 15kph/sec ramp rate), so the number should be pretty reliable.

Mark :)

Hey GOD12A,

Unfortunately the info about the 310-320 number is purely off the many threads and information that I have obtained from mechanics/tuners and owners. This is the number that averages out most commonly and I haven't found any other consistent information that suggests to me otherwise. I should have clarified that that number is maximum for what you would hope to call a safe level? I have no doubt you could wind them up further but I doubt they would last long enough to call them reliable? The comment on the Dyno is just an example of 1 of the many variables as you stated. I have no doubt other people have other experiences that contradict what I have found along the way and I can't claim any of this data is first hand from my own build. I can only base it on what I have found so far. If you have your own experiences that contradict what I have found so far I am more then happy to hear it :) seeing how I am in a position to either keep or upgrade my current -7's I would be very interested to hear...

Cheers,
Aron

Heya R34LINER :)

I'm confident to push the turbos till they stop making power, as long as they have a clean oil and coolant supply with no objects thrown in the compressor cover, they should hold together!

We tuned up to 21psi and didn't find the turbos to be any restriction. We only stopped winding boost into her as the Haltech internal MAP sensor maxes out at 1.5bar (22psi) and I have no interest in a 3bar sensor as it'll tempt me to see how far she'll go (likely ending up with the OE bottom end destroying itself!)

The current power output is fun and thrashable for now, so no use pushing the limits just yet ;)

Mark :)

Now that is interesting...

So just to clarify, how much power are you getting at the wheels? What other supporting mods? (obviously Injectors and Fuel pump but did you go d-jetro or bigger AFM's?)

Heya R34LINER,

340rwkw

OE fuel pump, 550 injectors, Haltech Platinum Pro (MAP, so no AFMs)

Mark :)

hey're cheap enough. Run them hard and if they pop, buy more.

Yea for me its the taking them in and out that is pain in the arse :P trying to do it in the engine apparently is a nightmare and the only other option is to take the engine out soooo rock and a hard place...

OP, if it were me (with a standard bottom end), I'd be putting -9's on it, pegging it at 23 psi or so and make a responsive 340-350 on E85 - seeing that you're going down the E85 route anyway. The car will have much more area under the curve than a -5 car. I really think -5's on a 2.6 are still a bees dick too big. They really need a stroker.

I'd offer my own car up for a drive but my box is

deaded and its not really a fair comparison to what you're going to get with a stock engine.

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

    • I got back to Japan in January and was keen to get back on track as quickly as possible. Europe is god-awful for track accessibility (by comparison), so I picked up a first-gen GT86 in December just to have something I could jump into right away. The Skyline came over in a container this time and landed in early January. It was a bit battered after Europe, though—I refused to do anything beyond essential upkeep while it was over there. The clutch master cylinder gave out, and so did the power steering. I didn’t even bother changing the oil; it was the same stuff that went in just before I left Japan the first time. Naughty. Power steering parts would’ve cost double with shipping and taxes, so knowing I’d be heading back to Japan, I just postponed it and powered through the arm workout. It took a solid three months to get the car back on the road. Registration was a nightmare this time around. There were a bunch of BS fees to navigate, and sourcing parts was a headache. I needed stock seats for shaken, mistakenly blew 34k JPY on some ENR34 seats—which, of course, didn’t fit—then ended up having the car’s technical sheet amended to register it as a two-seater with the Brides. Then there’s the GT86. Amazing car. Does everything I want it to do. Parts are cheap, easy to find, and I don’t care what anyone says—it’s super rewarding to drive. I’ve done a few basic mods: diff ratio, coilovers, discs, pads, seat, etc. It already had a new exhaust manifold and the 180kph limiter removed, so I assume it’s running some kind of map. I’ve just been thrashing it at the track non-stop—mostly Fuji Speedway now, since I need something with higher speed after all that autobahn time. The wheels on the R34 always pissed me off—too big, and it was a nightmare getting tires to fit properly under the arches. So I threw in the towel and bought something that fits better. Looks way cleaner too (at least to me)—less hotboy, less attention-seeking. Still an R34, though. Now for future plans. There are a few things still outstanding with the car. First up, the rear subframe needs an overhaul—that’s priority one. Next, I need to figure out an engine rebuild plan. No timeline yet, but I want to keep it economical—not cutting corners, just not throwing tens of thousands at a mechanic I can barely communicate with. And finally, paint. Plus a bit of tidying up here and there.  
    • Nope, needed to clearance under the bar a little with a heat gun, a 1/2" extension as the "clearancer", and big hammer, I was aware of this from the onset, they fit a 2.0 with this intake no problems, but, the 2.5 is around 15mm taller than a 2.0, so "clearancing" was required  It "just" touched when test fitting, now, I have about 10mm of clearance  You cannot see where it was done, and so far, there's no contact when giving it the beans Happy days
    • It's been a while since I've updated this thread. The last year (and some) has been very hectic. In the second-half of 2024 I took the R34 on a trip through Germany, Italy, France and Switzerland - it was f*cking great. I got a little annoyed with the attention the car was getting around Europe and really didn't drive it that much. I could barely work on the car since I was living in an inner-city apartment (with underground parking). During the trip, the car lost power steering in France - split hose - and I ended up driving around 4,000kms with no power steering.  There were a few Nurburgring trips here and there, but in total the R34 amassed just shy of 7,000kms on European roads. Long story short, I broke up with the reason I was transferred to Europe for and requested to be moved back to Japan. The E90, loved it. It was a sunk cost of around EUR 10,000 and I sold it to a friend for EUR 1,500 just to get rid of it quickly. Trust me, moving countries f*cking sucks and I could not be bothered to be as methodical as I was the first time around.
    • I assume clearances were all a-okay?
×
×
  • Create New...