R32 Gtr Long Term Love, Now Project

[admS15]

It will, you're nearly there. Home straight and all that.

[r32-25t]

[Dose Pipe Sutututu]

Wen Roll Racing trophy?

[r32-25t]

You’re a funny man 

[r32-25t]

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. 

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 

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 ✅ 

[Dose Pipe Sutututu]

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.

[r32-25t]

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 

[Dose Pipe Sutututu]

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.

[Duncan]

0.5mm is a horribly low gap; I know we don't modify these cars for fuel economy but you are leaving a lot of burn efficiency behind to run a gap that small. Standard is 1.1mm

[r32-25t]

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 

[Dose Pipe Sutututu]

1 hour ago, r32-25t said:

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

Aids, need a new kit pretty much.

[r32-25t]

7 hours ago, Dose Pipe Sutututu said:

Aids, need a new kit pretty much.

They sell just the boots and bracket as a kit so there’s no need to buy new coils or wiring 

[Dose Pipe Sutututu]

Probably explains why I can't run any gap above 0.5mmm without misfires 😂

[r32-25t]

photo a mate took in the sun 

[r32-25t]

[r32-25t]

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 

[r32-25t]

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 

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 

[Duncan]

This has to be getting frustrating....

Is it all original wiring loom? Sounds like some more money needs to be spent on a new ECU/engine/sensors loom

[r32-25t]

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 

[MBS206]

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?