andyfloyd

EDIT : Just got a new laptop and got VD to work. Here is what VD thinks. Pretty close with less drop off up top.

Thought this would be interesting to share here. This is a virtual Dyno type program but it's actually very accurate and repeatable. I took the best log I could find on the 2560r and compared it to two recent logs I did on my gtx2860. Biggest difference is the 2560 was done in the dead of winter and the 2860 was done in the heat of summer.

So the 2560 has every advantage and it's basically a best case scenario for that turbo. I actually have dynoed the 2560 on a dynojet and it made 296whp and 302ftlb, anyways. The 2560 is running roughly 20psi falling to 18psi. Both 2860 graphs are running 21-22psi to redline so a couple more lbs of boost. I always see a lot of people worried about lag. Well if you are running a .64 turbine like I am you can see lag isn't really an issue. 2560 does light off faster but by 3800rpm the 2860 passes it and doesn't look back.

I remember Jeremy from FM did a comparison a long time ago with these turbos but at only 12psi and there was no difference between them at that low boost level besides more lag on the 2860. This is a true high boost comparison to show you what they can do. My 2860 is still not maxxed out I can probably bring it up to about 24psi before it's tapped out.

Artifex

Nice info. Thanks for sharing. It's cool to see only a ~250 RPM difference in spool even with slightly higher boost.

I'm curious about this software. Logdyno? I'm assuming you upload a pull and enter your information same as VD. Any reason to use this over the popular VD?

andyfloyd

VD won't work on my ancient laptop. LogDyno is an Android app. It costs $15 but it's really good. Once I got all the information setup and drag coefficient, etc I find it to be very repeatable. That's the only reason I'm not using VD.

I think this comparison really shows that the new GTX stuff is not laggy, after driving my car with the 2860 gen2 I find no reason to go with a 2560 unless you only want 200-250whp.

codrus

Jeremey's comparison was between a 2560 and a GT2860, not a GTX. The GT2860 is much laggier and has very little extra top end, the GTX fixes both of those.

The big difference is cost. GTXs cost twice as much as 2560s.

--Ian

andyfloyd

True that old comparison was a disco potato. They are more money but with it IMO

Chiburbian

iTrader: (1)

I'm really looking forward to see how the new 25-550 compares. While I am planning on going Borg Warner EFR for my next turbo setup, I will admit that if the 25-550 gets close to my goals with similar'ish midrange to the EFR it will make my decision to ditch my current manifold and downpipe setup pretty tough.

shuiend

iTrader: (24)

Once covid is over you can drive out to Charleston and if you are willing to do a little work you may be able to drive a car with both.

lsc224

iTrader: (13)

Nice comparison, I have the disco potato. It's okay for daily driving but I have nothing to compare except for the chinese 2871. But the GTX2860 II looks like a hoot to drive.

andyfloyd

I just added this to the top of the thread as well. I finally got a new laptop, it had literally been 10 years since i got a new one. I got VD to work and uploaded my run and this is what it comes up with. I mean, thats pretty much 6258 type boost threshold no? Borg Warner lovers where are you at???!!!

der_vierte

This is pretty awesome as i have a 2560 and now know that a GTX2860 Gen 2 is worth a look, if i want to upgrade my turbo and NOT change ANY parts, even all the oil fittings are the same.

Is this on E85?

jonboy

They will be along soon saying that the graphs may look similar, but the transient throttle response is totally different

jonboy

From other posts I think it's on the US equivalent of EU 97 fuel, with some octane booster added as well...

andyfloyd

Yes I use 93 with vp octanium. It's roughly 99-100 octane. On straight 93 I run a max of 18-19psi.

andyfloyd

The 2560 is a great turbo. I basically wanted 350whp and the 2560 was just done at right around 300. For what it is a 30 year old turbo the 2560 is pretty damn good. Yes the gtx2860 stuff is a literal bolt on affair. Then you make 350hp and rejoice and frolic in a field of flowers.

andyfloyd

Haha, right you are. The transient response on the GTX is pretty damn good. I mean I'll log boost response at like 4000rpm and 5000rpm if they really want to compare.

Artifex

FTFY

The appeal for the GTX2860 is definitely strong. It makes me sorta wish I went with a T25 route instead of MKTurbo for more upgrade options down the road. I went with MKTurbo for the cost efficiency and easy button-ness. It was my first time going turbo and I didn't want to fumble with sourcing a turbo and other odds and ends. I'm loving it so far at 8psi. I know I'll want more eventually (soon) though..

andyfloyd

Yes kittens will be there. Good call bro

yossi126

iTrader: (6)

Helped us making a decision towards the 28 on a friend's project. Poscats.

andyfloyd

Sweet man! Its a great turbo. Im a Garrett fanboi over here, always have been. Details on your buddies setup??

yossi126

iTrader: (6)

Just forged rods vvt with a taco taco, nothing fancy.