DYNO RESULT: T517Zs on GTR

[JAGR33]

THE RESULTS ARE IN!!!!!!

After driving my car around with 260rwkws (stock ecu/turbos) for three months, the hunger for more power was unbareable, so I went on the costly journey a lot of GTR owners decide to take....

My car has finally undergone the turbo upgrade, and after much deliberation decided to go for the Trust T517Z turbo kit. These turbos were chosen as everyone opts for the HKS 2530s, so I decided to be different and more importantly wanted to see the difference between the two, mainly POWER, RESPONSE, LAG...

These are the performance modifications undergone with the upgrade:

- Power FC

- Nismo AFM x2

- Trust Fuel Rail

- Trust 720cc Injectors

- SARD Fuel Pressure Regulator

- Trust T517Z 8cm2 turbos x2

- Bosch 044 Fuel Pump

- HKS EVC4 Boost Controller

- Custom Catch Can

- Daiken Exedy Twin Plate Clutch (converted to push type)

On the dyno the car pumped out 324 rwkws at 20psi (1.3bar). I was very happy with the result, but noticed that car was much laggier which was expected.... However when full boost hits (around 4800rpm), u can't help but smile!!!!!

In the next couple of weeks, there will be a comparison between my car and Simon's car (meshmesh) who has the exact modifications except HKS 2530 turbo kit.... The comparison will be done on the same dyno, same day....

Anyway heres the dyno sheet:

(NOTE: This was NOT done in 'SHOOTOUT MODE')

http://www.meggala.com/T517Za.gif

P.S Big thanx to Gerald and Nigel at Ice Performance!!!!!

And BIG THANX to Steve aka meggala!!!!!

[nitemare5]

nice, congrats on the result!

[predator]

good stuff jack! should be able to push your car into the low 11's now I'd imagine??

[Al]

Great to hear it's back on the road, with a greater punch .

Hope you start coming to cruises again .

[JAGR33]

Pred: yeah it better!!!! Last time I was out with the old setup got 12.000....

Oh so close to an 11!!!

Al: yeah definetly, its been 6 weeks since I last drove my car!!!!

[tribex]

intresting dude, thanx for posting, maybe try cam gears as well those turbos are supposed to have bugger all lag compared to the 2530's, good luck.

THE RESULTS ARE IN!!!!!!

After driving my car around with 260rwkws (stock ecu/turbos) for three months, the hunger for more power was unbareable, so I went on the costly journey a lot of GTR owners decide to take....

My car has finally undergone the turbo upgrade, and after much deliberation decided to go for the Trust T517Z turbo kit. These turbos were chosen as everyone opts for the HKS 2530s, so I decided to be different and more importantly wanted to see the difference between the two, mainly POWER, RESPONSE, LAG...

These are the performance modifications undergone with the upgrade:

- Power FC

- Nismo AFM x2

- Trust Fuel Rail

- Trust 720cc Injectors

- SARD Fuel Pressure Regulator

- Trust T517Z 10cm2 turbos x2

- Bosch 044 Fuel Pump

- HKS EVC4 Boost Controller

- Custom Catch Can

- Daiken Exedy Twin Plate Clutch (converted to push type)

On the dyno the car pumped out 324 rwkws at 20psi (1.3bar). I was very happy with the result, but noticed that car was much laggier which was expected.... However when full boost hits (around 4800rpm), u can't help but smile!!!!!

In the next couple of weeks, there will be a comparison between my car and Simon's car (meshmesh) who has the exact modifications except HKS 2530 turbo kit.... The comparison will be done on the same dyno, same day....

Anyway heres the dyno sheet:

(NOTE: This was NOT done in 'SHOOTOUT MODE')

http://www.meggala.com/T517Za.gif

P.S Big thanx to Gerald and Nigel at Ice Performance!!!!!

And BIG THANX to Steve aka meggala!!!!!

[DoughBoy]

No aftermarket cams? Or headgasket?

[meshmesh]

Hey Jack... either way you gotta be happy . The boys were always pretty confident about your car making the power..no probs. I think it was only a concern about lag?? But by what you say @4800~rpm, that sounds about the same as mine. I tried to do an overlay of your dyno that you emailed me against mine, but the Kmh per hours are set differently, and I think you'll find that yours is not that laggy after all, in comparison my 2530's set up.

Hopefully my friggin clutch arrives next week. once it does, we'll organise a day with the boys on the dyno.

Tribex.. I think Jack does have cam gear?? he can confirm, also jack did you end up putting some lightened pulleys? If so do you notice any difference?

Well done.

[rev210]

you might like to keep the boost down on those turbo's according to the gtr-uk forum guys who have had them aren't the best pick for being reliable over the boost pressure your running.

[summoner]

I'm curious, what did you make at 1 bar? what are these turbos equivilant too? are you running stock internals?

for cost of the PFC and Nismo AFM's I mite recommend the Wolf3d V4 which will also give you boost control and allow you to run a MAP table. Overall a very nice result can you do a run in shootout mode so I can compare my figures to yours?

my chart can be found here http://summoner.perthstreetcars.net/Cefiro...o/mark_dyno.JPG and this was done in shootout at 1 bar.

[Cubes]

Is boost tailing off a little with higher rev's?

[JAGR33]

tribex- yes your right, they are meant to be less laggier than 2530s, but in the 8cm2 version, mine are the 10cm2 version so maybe that's why they are laggier?? Dunno...

Yes I have Trust cam gears....

Doughboy- standard cams, standard headgasket...

meshmesh- yeah full boost is around 5000rpm, getting used to the lag now!!!! As far as the Trust pulley kit, not sure if it made a difference....

rev210- yeah saw that thread, these turbos are apparently capable of 2 bar, don't know about reliability.... my car gets driven on weekends only, so doesn't clock up the k's....

summoner- I'm not sure what the car makes at 1bar, pretty useless running at 1 bar might aswell stay with stock turbos...

These turbos are equivalent to HKS 2530s rated at 600hp for both of them...

Yes running stock internals....

Didn't want to use anything but Power FC, personal preference....

Will do a readout in shootout mode in a couple of weeks when we do the comparison between my car and Simon's (meshmesh)... STAY TUNED!!!! By the way what turbos you running???

Don't think itas tailing off that much, feels very strong.... will have to check it out next time...

[Gav]

for cost of the PFC and Nismo AFM's I mite recommend the Wolf3d V4 which will also give you boost control and allow you to run a MAP table.

Summoner - you should know the rules by now! It's not permitted to use Wolf on GTRs in the Eastern States! :jk:

[summoner]

hope you got $'s for a spare engine then cause you'll need it.

We limited mine to 1bar boost and its running stupidly rich(fouls up plugs) so going to have to drop it down to maybe 12psi and cleantune up. Over 450rwhp and imho you are risking the engine.

My turbo's are equivilant to around hi flo 2540's... Efficiency is the key

[NRB]

I may not know the intricacies of tuning, but wtf has boost got to do with running rich/lean? Sounds more like your tuner hasn't got his fuel mapping correct than whether you're running too much boost...

I'm running 2530s at 19psi and my AFR is sitting dead on 12.0, I don't know why you'd want to run these turbos at a lower boost pressure than that.

[jezzrrr]

Great figures without cams - I did a fair bit of reading on these Trust turbos and found alot of overseas people (UK) had major problems with longevity.

Trust may well have fixed this problem but if they havent I understand the following is the go:

1. upgraded thrust bearing

2. Oil cooler to reduce temps as they are oil cooled

3. hope for the best

Not wanting to appear pessemistic just what I have herd.

Jeremy

[R31Nismoid]

hope you got $'s for a spare engine then cause you'll need it.

why do you say that?

[meshmesh]

summoner & jezzzr, that's the first time I've heard such claims about the trust kits. At the same time, I'm taking it with a grain of salt, mainly because one of AU's most respected gtr builders Ben from racepace recommended these and infact built Ph1's GTR also with the Trust turbo's. Ph1 is pushing around 350rwk with these turbo's, and I am yet to hear he has any problems, perhaps he can confirm. Finally, don't get me wrong, but the pommies aren't exactly as upto date with GTR as AU are they??, and their not the most talented when it comes to engineering, tuning either...

[jezzrrr]

I hope I am wrong (or rather what I read was wrong) because I will be getting a pair of these turbos if they are as durable as HKS/Garett etc, they clearly make great power. The thread that put me off is:

http://www.gtr.co.uk/forum/upload/showthre...ead.php?t=21242

Its worth a read - UK may be behind us but theyve been using these trust turbos for a while.

Jeremy

[Whoneedstherapy]

Congrats on the results!! sounds like a very nice package

As for the turbo's longevity, i've never heard of anyone out here having trouble with them at all. Pete at advan backs them to the hilt, reckons they're the best bolt on low mounts along with 2530's.

It's funny there not having that problem in japan. Maybe they don't like english weather haha :headspin: