Hypergear Turbochargers and High flow Services Development thread

[GTScotT]

Remember mine is peaking at 25psi so it usually takes alil longer the higher the boost if you want to compare to yours at 20psi it gets there by 3600rpm

Only bad thing about it is it noses off abit after 6000rpm but might be sorted now due to the 4psi drop before now I got a 20psi actuator which seemed to fix it

Ah yeah true.

I'm keen for another visit to the dyno. Need to get my bugs fixed and I hope he's willing to squeeze 10/10s out of it now

[Manuel Kasko]

So I will have to look at preloading my wastegate.

Can you purchase better aftermarket actuators?

From what I remember it was pinging at the 250 mark so was backed off slightly. Would it have the same limitation if I was to get it to hold the 20psi throughout the rev range?

[Trozzle]

So I will have to look at preloading my wastegate.

Can you purchase better aftermarket actuators?

From what I remember it was pinging at the 250 mark so was backed off slightly. Would it have the same limitation if I was to get it to hold the 20psi throughout the rev range?

Depends on WHY it was pinging, but more than likely yes - if anything worse.

[Marcus89]

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Got my car tuned today. It's running an atr43g2.5 and made 250rwkw with boost hitting 21psi and coming down to 16psi.

The tuner was saying that if they tried to add in more boost they had to keep pulling timing so unfortunately this is how they had to tune it. Any ideas what may be going on Stao?

[hypergear]

Was this on a high flowed unit? Its about the right amount of power for a g2 compressor.

[GTScotT]

342whp = 256rwkw

That's good power for a G2.5 Not a great deal left in it on 98. Done well.

[Marcus89]

Was this on a high flowed unit? Its about the right amount of power for a g2 compressor.

It's a g2.5 type B also. It was originally a g2 I think but as blown so when I sent it to you you did the upgrades as well as rebuilding.

I'm happy with the power just wasn't sure why it seemed to need less boost at higher revs cause otherwise it would just ping. Comparing my graph to the one you have on your site:

http://www.hypergearturbos.com/images/dynosheets/atr43/atr43g3/60comp110512E85/power.jpg

Mine is very similar to the 98 power curve (green curve, yellow is e85) up until my boost starts dropping off. Would have been nice to wind a bit more in.

I was just thinking could my intake be the issue? I have a stock airbox with 3inch piping to the turbo. Was hoping to keep the car looking stock but if it's causing this issue i'd be happy to make a pod filter enclosure

[Trozzle]

It's a g2.5 type B also. It was originally a g2 I think but as blown so when I sent it to you you did the upgrades as well as rebuilding.

I'm happy with the power just wasn't sure why it seemed to need less boost at higher revs cause otherwise it would just ping. Comparing my graph to the one you have on your site:

http://www.hypergearturbos.com/images/dynosheets/atr43/atr43g3/60comp110512E85/power.jpg

Mine is very similar to the 98 power curve (green curve, yellow is e85) up until my boost starts dropping off. Would have been nice to wind a bit more in.

I was just thinking could my intake be the issue? I have a stock airbox with 3inch piping to the turbo. Was hoping to keep the car looking stock but if it's causing this issue i'd be happy to make a pod filter enclosure

Definitely not that part of your intake - generally if it's pinging with more boost, it'll be from combustion chamber temps getting high. This is either from exhaust back pressure, or perhaps a restriction in the intake AFTER the turbo (intercooler is the usual suggested culprit here). Either that, or the turbo is just being pushed beyond its efficiency.

[GTScotT]

Intake leak could explain it, too.

If its leaking from somewhere after the turbo you could see the boost drop you are and then work the turbo harder to keep up the boost, pushing the compressor out of efficiency and causing the ping.

Sounds like you are almost there, you just need to go over the setup with a fine tooth comb and iron out any small bugs.

[Manuel Kasko]

Same issue with my SS1PU

If it didn't taper off to 16psi from 20

Then it would have pinged earlier.

[Trozzle]

Intake leak could explain it, too.

If its leaking from somewhere after the turbo you could see the boost drop you are and then work the turbo harder to keep up the boost, pushing the compressor out of efficiency and causing the ping.

Sounds like you are almost there, you just need to go over the setup with a fine tooth comb and iron out any small bugs.

Yeah, just thought of this too. Intake leak would put it out of efficiency as it's trying to overcome a massive hole lol

[Marcus89]

Definitely not that part of your intake - generally if it's pinging with more boost, it'll be from combustion chamber temps getting high. This is either from exhaust back pressure, or perhaps a restriction in the intake AFTER the turbo (intercooler is the usual suggested culprit here). Either that, or the turbo is just being pushed beyond its efficiency.

Shouldn't be back pressure I have a full 3 inch exhaust with hi-flow cat would hope that's not already a restriction. My fmic is a return flow ARC which isn't particularly big as FMIC's go but once again I'd hope it can keep up with under 300rwkw

Intake leak could explain it, too.

If its leaking from somewhere after the turbo you could see the boost drop you are and then work the turbo harder to keep up the boost, pushing the compressor out of efficiency and causing the ping.

Sounds like you are almost there, you just need to go over the setup with a fine tooth comb and iron out any small bugs.

Ah that makes sense to me will definitely check this out hope I don't need to take my intake off again that was a pain for doing injectors

[GTScotT]

Did you take off the top plenum to do the injectors??

If so, did you replace the gasket and did you clean the surfaces extremely well? If not, I'd say you should check there for leaks LOL

Mick_o had one of those leaks and it was a bitch to spot. Car wouldnt exceed 280kw.. Found the leak by running water over the intake manifold while it was doing 4th gear pulls on the dyno. Fixed gasket and WHAM 335rwkw.

[Marcus89]

Did you take off the top plenum to do the injectors??

If so, did you replace the gasket and did you clean the surfaces extremely well? If not, I'd say you should check there for leaks LOL

Mick_o had one of those leaks and it was a bitch to spot. Car wouldnt exceed 280kw.. Found the leak by running water over the intake manifold while it was doing 4th gear pulls on the dyno. Fixed gasket and WHAM 335rwkw.

Didn't clean it well or change gasket so yea sounds like my most likely place

[Manuel Kasko]

Didn't clean it well or change gasket so yea sounds like my most likely place

That one is a bitch to change

Good luck

[GTScotT]

Sorry to hear mate, Buy some gaskets and change anything suspect while your on the job

[hypergear]

G2.5 is a smaller turbo then a G3, they generally maxing out towards 260rwkws mark. So its about at its limit.

[GTScotT]

He's right, the graph shown is for a G3, but the intake leak might still be present and causing the 5ish psi boost drop. Fixing it might get him another 10-15kw from threshold to redline, definitely worth investigating.

[iruvyouskyrine]

I'm about to pull the top of my intake manifold off to do injectors. I should be right if i just use a genuine nissan gasket and clean is with a razor blade before i put new gasket on yeah?

[Missileman]

I'm about to pull the top of my intake manifold off to do injectors. I should be right if i just use a genuine nissan gasket and clean is with a razor blade before i put new gasket on yeah?

No need to take the top of the plenum off, I did my injectors and only removed the crossover pipe and throttle body. Used a 13mm ratchet ring spanner for the front fuel rail bolt and socket/ universal/ 6" extension for the rear bolt, you will need 6mm hex for the 4 throttle body cap screws.

Edited August 2, 2013 by Missileman