Jump to content
SAU Community

Recommended Posts

I had my r32 GTR on 2 Dyno's

At croydon at all 4 wheels it had 139kw

At Unique Auto Sports it had 178kw at the rear wheels at 11psi boost (same as @ croydon)

At Unique Auto Sports it had 208kw at the rear wheels at 14psi boost

The only other mods the car has is exhaust and BOV.

I had my r32 GTR on 2 Dyno's

At croydon at all 4 wheels it had 139kw  

At Unique Auto Sports it had 178kw at the rear wheels at 11psi boost (same as @ croydon)

At Unique Auto Sports it had 208kw at the rear wheels at 14psi boost

The only other mods the car has is exhaust and BOV.

So at Croydon, where it made 139 awkw you were also running 11 psi boost? 40 kw seems like a big difference even taking into account the difference between 2 and 4 wd. Did you quiz them at all?

So at Croydon, where it made 139 awkw you were also running 11 psi boost?  40 kw seems like a big difference even taking into account  the difference between 2 and 4 wd. Did you quiz them at all?

Yeah I had 11psi boost at Croydon. I had only recently got my car so I was unsure of figures. They told me that was a fairly normal awdkw figure for a GTR. I thought it was a bit low thats why I had the car checked at Unique.

Yeah I had 11psi boost at Croydon. I had only recently got my car so I was unsure of figures. They told me that was a fairly normal awdkw figure for a GTR. I thought it was a bit low thats why I had the car checked at Unique.[/quote

This is really interesting. Prior to purchase I had my car dynoed at an independent 4 W dyno shop here in Canberra and it pulled 180 awkw. Yesterday at Silverwater Auto Services who apparently pride themselves on the accuracy of their dyno it pulled 130 awkw.

I know dynos aren't dynos but given that both runs were on the same boost, about 9 psi, this presents me with a bit of a dilemma because I don't know if there is a problem or not; 50 kW is a hell of a big drop although I note that it's about the same as the increase you experienced going from four-wheel to two wheel dynos. I really don't think it it was in 2wd mode the first time but it must've been.

Did the guys at Unique say anything about whether they felt that power readings there were fairly typical of what your car should be producing?

Yeah I had 11psi boost at Croydon. I had only recently got my car so I was unsure of figures. They told me that was a fairly normal awdkw figure for a GTR. I thought it was a bit low thats why I had the car checked at Unique.[/quote

This is really interesting. Prior to purchase I had my car dynoed at an independent 4 W dyno shop here in Canberra and it pulled 180 awkw. Yesterday at Silverwater Auto Services who apparently pride themselves on the accuracy of their dyno it pulled 130 awkw.

I know dynos aren't dynos but given that both runs were on the same boost' date= about 9 psi, this presents me with a bit of a dilemma because I don't know if there is a problem or not; 50 kW is a hell of a big drop although I note that it's about the same as the increase you experienced going from four-wheel to two wheel dynos. I really don't think it it was in 2wd mode the first time but it must've been.

Did the guys at Unique say anything about whether they felt that power readings there were fairly typical of what your car should be producing?[/quote]

does your car feel like it has lost a shitload of power since u have had it??

coz im oretty sure u would feel that sort of power loss?

does your car feel like it has lost a shitload of power since u have had it??

coz im oretty sure u would feel that sort of power loss?

Bretto;

No I didn't notice, I agree that I should / would have. But I suspect that the dyno here is optimistic.

Good news is that the problem has been found by the guys working on it. Would you believe the throttle wasn't opening all the way?! Checking for power loss Rule 1: Is the throttle opening fully? I guess neither they nor I believed that it could be the case but...there you go. Latest reading is 168 AWKW at Silverwater on standard boost ie .7 bar and with an exhaust. Doesn't explain the difference in inital readings, but I'm happy to put that down to an optimistic dyno here.

Thanks to everyone who responded.

i thought the figure was about 140 awkw standard. My r32 GTR started with about that figure then i added a power FC and full 3inch exhaust and got it tuned, gave me 180 awkw then i fit an AVCR, HKS filters and screwed it to 1bar boost and it gave me 210 awkw. I also read that GTR's pull 140 awkw in standard form in an issue of Hi Performance Imports.

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

    • Yeah the ACL and similar formable heat shielding materials are really nice. But most people do not have the patience or talent to do a good job like that. Almost anything is better than nothing though. Even if you didn't form it closely like that and just had a slab of it slipped in between the manifold and somewhere/thing you wanted to protect, you would gain benefit. There has to be a market opportunity for people like Artec to make formed heatshields to suit their cast manifolds. The fact that they are cast means that they are consistently the exact same dimensions and they could add bosses to the castings like you see on stockers to allow heat shields to be firmly attached yet floating away from the manifold itself.
    • I've seen some stuff like this as well, not sure if it's a good idea or anything but it does have more standoff from the piping than the conventional fiberglass wrap:  
    • Jap premium will be 100 RON. You should use 98.
    • The exhaust gases are at their highest temperature as they leave the exhaust port and enter the manifold. They cool as they flow through the manifold because they transfer heat to the manifold and the manifold loses heat to the surrounding environment. Thus, inevitably, the exhaust gases are cooler as they enter the turbo compared to when they entered the exhaust manifold. So, yes, the exhaust manifold can easily get as hot as the turbine housing. Having said that, you will generally see the highest temperatures where the exhaust gases have to slow down or they are concentrated into one area - which is usually the collector on the manifold and in the turbine housing, because the gases slam into the metal at those places, increasing the convective heat transfer coefficient and transferring even more heat to the metal than they might just flowing past elsewhere. Exhaust manifold heat shields are a good idea - certainly for the stock manifold they are there from the factory. People seldom have anything like that on a tubular manifold because they are hard to achieve. Some might wrap a tube manifold with fibreglass tape - but this has a reputation of leading to cracked welds. The best case is generally to put ceramic coating onto the manifold to prevent it getting as hot (internal coating) and radiating/convecting heat into the bay (external coating). All the real heat from a turbo comes from the exhaust side. The gases entering are at ~800-900°C and the steel/iron gets nearly that hot. The compressor side is only going to heat the charge air up to <<200°C (typically not much more than 100°C). So that's nothing, by comparison. The compressor is not a significant source of engine bay heat.
    • Late to the party, specifically joined this forum as I just bought one of these and this thread has been a gold mine of info. If the OP is still around, mind if I ask what gas you been putting in yours? Mine has a Japanese sticker in the cap saying premium but it seems to get way worse mileage on premium (95) than 91. I always thought it was meant to be the other way round🤷 I do think Nissans claimed "6l/100km" is a bit fantastical 😂
×
×
  • Create New...