Jump to content
SAU Community

Recommended Posts

  • 2 weeks later...

Well the dyno didn’t quite go according to plan, the car didn’t blow up or anything stupid thankfully but it had a really bad spark break up. 
IMG_1277.thumb.jpeg.1e5ea56ce1123d71bc41bb61f0d0e6a5.jpeg

the blue line is the 2.6 6466 and the red is the 2.8 6870

At least i got to drive the car home which is the first time since Xmas 2020. Luckily a friend was nice enough to lend me his coils for me to test and it fixed the problem 

IMG_1289.thumb.jpeg.62de884456e2a9dd1e5a3029520b23b7.jpeg

It turns out the old type prp stalks are well known for being an issue so I replaced all the stalks with the new type and the new bracket to suit and that should be job done  

  • Like 4

So you're saying the original bracket can't be used anymore with the new stalks?

I reckon I have the same issue, considering I have R35 coils too, I need to gap the plugs under 0.5mm to stop blow out at 1.8bar of boost.

8 hours ago, Dose Pipe Sutututu said:

So you're saying the original bracket can't be used anymore with the new stalks?

I reckon I have the same issue, considering I have R35 coils too, I need to gap the plugs under 0.5mm to stop blow out at 1.8bar of boost.

Yes the bracket is different and needs to be changed as well 

1 hour ago, r32-25t said:

Yes the bracket is different and needs to be changed as well 

Is it a height difference or the hole is different?

Keen to know, and I'm sure others would like to ask well.

54 minutes ago, Dose Pipe Sutututu said:

Is it a height difference or the hole is different?

Keen to know, and I'm sure others would like to ask well.

The hole that the coil drops into is bigger and has a taper on it as an extra way of holding the boot on 

  • 2 weeks later...
  • 2 weeks later...

Been driving it every chance I get, have done just over 350kms and removed the run in oil. It’s is really nice to drive and the flat shift is fun to use. The 6870 isn’t what I would call laggy, without using full throttle I’ve got positive pressure before 3k and cracking the gates around 4k. I’m still on the run in tune which is on 98 and limited at 6,000rpm 

  • Like 4
  • 2 months later...

I took it back to jem to get the full tune done and again it had its problems which meant it didn’t get finished 

d4aa5c16-e32c-4e82-ba32-6b718e496be3.thumb.jpeg.9457ec3ecab0a5e7c6ad1d90c6210a7c.jpeg

this is the dyno sheet on 98 at 22psi the rpm vs speed scale is off (the logs prove this) but gives an idea of what the curve actually looks like 

now to the issues of why we couldn’t continue,first the tail shaft center bearing was completely flogged out

second it was getting a voltage drop as it came onto boost and would go from 14v to 12.5 

third it has “noise” on the 5v sensors and gives errors on the dbw on cold start 

he also said 22psi is the wastegate pressure (it has 14psi gates) and would like the base pressure to be lower particularly on 98 

  • Like 1

Extremely frustrating, it’s all custom wiring with an elite 2500 and pdm, I’ve disconnected all the sensors one at a time and even removed all the can modules trying to find it, nothing appears to be an obvious problem at the moment 

Sounds like a potential ground loop on the sensors.

 

The 2500 has the sensor grounds go back to the ECU yeah? Are there any grounds that have been looped together, OR grounds in the sensor wiring to the chassis / motor?

 

The alternator one is a bit weird, does the same thing happen on the road? Is it definitely dropping voltage based on boost, or is it just RPM dependent?

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

    • Cheers. Skyline is back on the menu, can’t get rid of it. It’s like a child you don’t want, or herpes 
    • 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.
×
×
  • Create New...