Jump to content
SAU Community

Recommended Posts

  • Replies 92
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

  • 4 weeks later...
I believe that a compromise exists with low spool or boost threshold in one hand and high exhaust gas flow (for its size) in the other . I don't believe its possible to have a low boost threshold and high end performance AND headroom for future mods . If you tie yourself into small turbos you will limit the engines power potential by restricting exhaust flow out and airflow in - no free ride here . If it were me whatever turbo I chose would have the higher flowing turbine as the first consideration.

Obviously there is never going to be a one-size-fits-all turbo :P

My point is basically this: the 707160-5 seems to be the flavour of the month at the moment, but I am concerned its a little on the large size for stock-ish setups where response and average power are the main considerations. Some people have reported that even with cam work that boost is not kicking in a big way till 5000-ish RPM. Obviously a lot depends on exactly what is done and the state of tune, but if we just generalise for a moment.... What would be a good choice to replace the stock setup that provide near OEM spool (bearing in mind that the R32 GT-R turbos are not exactly modern even if they are small) but more headroom? The GT-SSs seem like a good compromise but they are very expensive IMHO. The 707160-5 obviously have the headroom but as I said, I'm concerned they will be too laggy: as for the GT28RS hybrid, surely that will be even bigger/worse in that respect?

Lucien.

for me it will always be a choice between HKS GT-SS or HKS GT2530. I am sure the generic ones are good but i personally know of so many happy HKS turbo customers that for me it's worth the few extra samolians to get a proven product.

Obviously there is never going to be a one-size-fits-all turbo :P

My point is basically this:  the 707160-5 seems to be the flavour of the month at the moment, but I am concerned its a little on the large size for stock-ish setups where response and average power are the main considerations.  Some people have reported that even with cam work that boost is not kicking in a big way till 5000-ish RPM.  Obviously a lot depends on exactly what is done and the state of tune, but if we just generalise for a moment....  What would be a good choice to replace the stock setup that provide near OEM spool (bearing in mind that the R32 GT-R turbos are not exactly modern even if they are small) but more headroom?  The GT-SSs seem like a good compromise but they are very expensive IMHO.  The 707160-5 obviously have the headroom but as I said, I'm concerned they will be too laggy:  as for the GT28RS hybrid, surely that will be even bigger/worse in that respect?

Lucien.

ok just to give people an indication when i first installed the gt 2560r(i going to continue calling them that as it is what is stamped on the cartiridge) 707160-5 is was a STD gtr with air box the works (nothing changed bar exhaust) and it was tuned to 316awhp (at all 4 wheels) the company which did the job fitted a SAFC2 to add fuel to low rpm range (nothing about 4500rpm)

The GTR at 316awhp managed a 12.08 at 113mph 1.7 60 footer first run, so i think that shops that the gt2560r can still be a nice turbo combo for a std gtr

Beer Baron is nice to have favorite brands but i have yet to see the small hks turbos out perform the garret units in any meanfull way(reliability or performance)

so you should give them a look before dismissing them.

The GTR at 316awhp managed a 12.08 at 113mph 1.7 60 footer first run, so i think that shops that the gt2560r can still be a nice turbo combo for a std gtr

I don't suppose you have a dyno printout for your setup when it was fairly stock bar the turbos? Drag times aren't really a good indication of average power.

Cheers,

Lucien.

I don't suppose you have a dyno printout for your setup when it was fairly stock bar the turbos?  Drag times aren't really a good indication of average power.

Cheers,

Lucien.

yes i do somewhere at home but unfortunately i'm on an oil rig in the mid of nowhere for the next two weeks, might be able to dig it up when i get back.

williamsf1

the nm of torque you quote how exactly do you get this figure as nearly all the dyno i have seen work in tractable effort ,or was this done on a engine dyno, i reason i ask is all new car etc are quoted in nm ,not the tractable effort you get off the normal dyno. Typically a few of the gtr i have worked on run around 1850 pounds of tractable effort

pete

pnblight this was with a dynolog dyno, and they have newer (i.e. not old DOS 3.1 software) as long as it is 1:1 ratio the NM or torque is shown to be very acurate..... I have it on good authority that this was prooven with a stock factory porsche and was within 2NM of the predicted factory numbers....

yes but the tuning still needs some work, basically it is making too much torque early on, and not enough top end.... and as most know the dynolog is a very low reading dyno!

we will be looking to take out a dip from 5500-6500 and reverse it to make a broader spead of power.....

standby for further results!

overall it is a torque monster! and pulls like a 12yr old at MJ's :P

yes but the tuning still needs some work, basically it is making too much torque early on, and not enough top end.... and as most know the dynolog is a very low reading dyno!

we will be looking to take out a dip from 5500-6500 and reverse it to make a broader spead of power.....

standby for further results!

overall it is a torque monster! and pulls like a 12yr old at MJ's :P

would love to see a dyno sheet as that is very healthy torque and most be fun to drive .I did some number crunching and i normally get around the 570 to580nm of torque but it is gain about 5000rpm and held through to about 7300rpm where it just starts to fade slightly does yours hold the torque through the rev range

pete

  • 3 weeks later...

Hey guys, just thought I'd dig this thread up again to see how the GT-SS vs 2860r debate is going..

One thing that DiscoPotato mentioned was that on the Garrett site there are in fact TWO GT2860's.. one is the 707160-5 that we are all talking about as being more or less the same as a HKS2530 or N1..

The other is a 707160-7. Which no one seems to mention much.

Take a close look at the spec on this and its more or less the same as GT-SS specs. But naturally it isn't going to be the same money as the HKS item.

Has anyone delved into this a bit more?

Have we got any opinions about if GT-SS truly do spool quicker and provide more average power on a stock to slightly modified RB26?

If so - perhaps the 707160-7 flavour of the 2860r is worth looking at?

Hey, WilliamsF1 did you have any luck getting more power up top with the GT-SS?

Obviously there is never going to be a one-size-fits-all turbo ;)

My point is basically this:  the 707160-5 seems to be the flavour of the month at the moment, but I am concerned its a little on the large size for stock-ish setups where response and average power are the main considerations.  Some people have reported that even with cam work that boost is not kicking in a big way till 5000-ish RPM.  Obviously a lot depends on exactly what is done and the state of tune, but if we just generalise for a moment....  What would be a good choice to replace the stock setup that provide near OEM spool (bearing in mind that the R32 GT-R turbos are not exactly modern even if they are small) but more headroom?  The GT-SSs seem like a good compromise but they are very expensive IMHO.  The 707160-5 obviously have the headroom but as I said, I'm concerned they will be too laggy:  as for the GT28RS hybrid, surely that will be even bigger/worse in that respect?

Lucien.

Hi Pete,

Are you back by any chance?

Bumpity bump.

Still trying to decide on a which way to jump (if at all). smile.gif

Edit: Interesting. The multiple quote thing doesn't work with quick reply.

would love to see a dyno sheet as that is very healthy torque and most be fun to drive .I did some number crunching and i normally get around the 570 to580nm of torque but it is gain about 5000rpm and held through to about 7300rpm where it just starts to fade slightly does yours hold the torque through the rev range

pete

ok here is a power run on a dynolog dyno.... 19psi

post-16093-1126272745.jpg

does anyone know whether the 2560 that pnblight is talking about is the same as the gt2860r 707160-5?

2560's

http://www.horsepowerinabox.com/HPIAB2/category12_1.htm

2860's

http://www.turbobygarrett.com/turbobygarre...0R_707160_5.htm

(sorry if someone has answered this.....but i couldn't find it)

if so, does anyone know the price from gcg? or are racepace still selling them?

does anyone know whether the 2560 that pnblight is talking about is the same as the gt2860r 707160-5?

I am no turbo expert, so I would wait for pnblight and discopotato to comment, but a cursory look suggests that the Garret GT2560R 466541- 3 and 466541- 4 do not have the right turbine housing (i.e. the dump flange bolt pattern is incorrect for a GT-R).

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

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...