2560r going 2860r
07-31-2012, 01:45 PM
#1
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2560r going 2860r
i'm running a 2560r for 2 years now, i really like the spoolup, but lack power uptop.
i'm actually running artech sidemount (begi replacement) and going for a bontom mount one(ditched AC and PS) to go with the 2860r.
my problem is that i have a built 1.6 with super low comp pistons( 7.9:1 cr)
and i fear that going for a 2860 with a .86 housing will be laggy SOAB
if i'M going with a .64 ar housing,can i dream of a near-as-2560r spool time?
if it spools sensibly as quickly(let's say 500rpm later) than my 2560r,will it flow enough not to amputate high-rev-boost?i read a couple of post that specifies everything for a track oriented car, but mine is a daily fun-street car that see drag more often than laping/autocross etc.
i'm curently running my 2560r@16-17 psi, super fun,4-5psi by 3000 and maxboost before 3600rpm. i plan on running the 2860 at 14-15psi for a starter and really hope to see max boost before 4000 revs.
i can live with a 4000rpm maxboost,but wouldn't want something that gets full boost at 4500 rpm. i allready know that a 1.8vvt and ms3x is the way to go, but i allready have my built 1.6 and my mspnp.
please destroy my opinions and dreams, i'd like to know what you think about it.
i'm actually running artech sidemount (begi replacement) and going for a bontom mount one(ditched AC and PS) to go with the 2860r.
my problem is that i have a built 1.6 with super low comp pistons( 7.9:1 cr)
and i fear that going for a 2860 with a .86 housing will be laggy SOAB
if i'M going with a .64 ar housing,can i dream of a near-as-2560r spool time?
if it spools sensibly as quickly(let's say 500rpm later) than my 2560r,will it flow enough not to amputate high-rev-boost?i read a couple of post that specifies everything for a track oriented car, but mine is a daily fun-street car that see drag more often than laping/autocross etc.
i'm curently running my 2560r@16-17 psi, super fun,4-5psi by 3000 and maxboost before 3600rpm. i plan on running the 2860 at 14-15psi for a starter and really hope to see max boost before 4000 revs.
i can live with a 4000rpm maxboost,but wouldn't want something that gets full boost at 4500 rpm. i allready know that a 1.8vvt and ms3x is the way to go, but i allready have my built 1.6 and my mspnp.
please destroy my opinions and dreams, i'd like to know what you think about it.
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07-31-2012, 01:55 PM
#3
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my 2560r could get to 300whp?
i wanted some more headroom with the 2860,since i tought that 260-280 would be a limit for a small turbo as the 2560r. and if i upgraded now for a 2860r i could keep my setup for a later bp swap.
if they flow the same(or about) you're right, it's pretty pointless.
i wanted some more headroom with the 2860,since i tought that 260-280 would be a limit for a small turbo as the 2560r. and if i upgraded now for a 2860r i could keep my setup for a later bp swap.
if they flow the same(or about) you're right, it's pretty pointless.
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si, but yeah, they use the same size compressor.
07-31-2012, 02:01 PM
#7
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As you all know, I love my GT2860rs w/ .86 turbine housing but that's with a tubular manifold. I might consider the GT2560 if I had a log manifold (might). I've never seen anyone with a .64 turbine produce a favorable dyno on the GT2860rs. It seems like something strange happens with that turbo and the smaller housing on our cars. I don't know if is the turbo, the tuning, or unknown unknows, but I wouldn't take a chance on it.
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07-31-2012, 02:12 PM
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so basically i'm better staying with the .86 ex-housing and face the lag?
the search function SUCKS relaly bad these days,i cant find anything on anything(only one thread show up when typing 2860...?...)
i saw a couple dyno chart, but each and everyone of them are bp/vvt/agressive porting/race prep.i have yet to see a dyno chart of a 8.5:1 comp 1.6+potato.
would a low comp 1.6l could see max boost(13-15psi) before 4000rpm on a .86 housing/tubular manifold and ''proper''street tuning(ironic)?
the search function SUCKS relaly bad these days,i cant find anything on anything(only one thread show up when typing 2860...?...)
i saw a couple dyno chart, but each and everyone of them are bp/vvt/agressive porting/race prep.i have yet to see a dyno chart of a 8.5:1 comp 1.6+potato.
would a low comp 1.6l could see max boost(13-15psi) before 4000rpm on a .86 housing/tubular manifold and ''proper''street tuning(ironic)?
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07-31-2012, 07:51 PM
#12
I suggest a Gt28 with a Tial billet compressor wheel in a .64 housing. AKA Tial Alpha28 or A28. You can send them your new GT28 for the upgrade.
The GT25 turbine section is horrible. The GT28 is awesome but lacks good compressor choices for that turbine. The 60mm compressor is too small. The 71mm compressor is too large for the turbine. Tial makes a billet 68mm extended tip compressor that matches the GT28 perfectly. It will spool 500RPM's faster than a GT2860.
We have fought this same battle on the Porsche and Audi installs. The 1.8 Audi/VW and twin 3.6 Porsche struggled with a hole in the Garrett offerings until Tial made this compressor wheel. You can buy the turbo from Tial.
Do some searching on Google.
The GT25 turbine section is horrible. The GT28 is awesome but lacks good compressor choices for that turbine. The 60mm compressor is too small. The 71mm compressor is too large for the turbine. Tial makes a billet 68mm extended tip compressor that matches the GT28 perfectly. It will spool 500RPM's faster than a GT2860.
We have fought this same battle on the Porsche and Audi installs. The 1.8 Audi/VW and twin 3.6 Porsche struggled with a hole in the Garrett offerings until Tial made this compressor wheel. You can buy the turbo from Tial.
Do some searching on Google.
Last edited by k24madness; 07-31-2012 at 08:31 PM.
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07-31-2012, 10:22 PM
#13
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I will be upgrading to a tater-0.64 from a 2560. But I have a 1.8 VVT not a 1.6.
My guess is the 0.64 will work well for your 1.6. Your issue is running the 2560 at 17 psi puts its compressor a bit outside its efficiency sweet spot. The tater compressor is more efficient at 17 psi (same size notwithstanding). Plus even the 0.64 turbine passes more gas than the 2560's.
My guess is the 0.64 will work well for your 1.6. Your issue is running the 2560 at 17 psi puts its compressor a bit outside its efficiency sweet spot. The tater compressor is more efficient at 17 psi (same size notwithstanding). Plus even the 0.64 turbine passes more gas than the 2560's.
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07-31-2012, 10:35 PM
#16
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I will be upgrading to a tater-0.64 from a 2560. But I have a 1.8 VVT not a 1.6.
My guess is the 0.64 will work well for your 1.6. Your issue is running the 2560 at 17 psi puts its compressor a bit outside its efficiency sweet spot. The tater compressor is more efficient at 17 psi (same size notwithstanding). Plus even the 0.64 turbine passes more gas than the 2560's.
My guess is the 0.64 will work well for your 1.6. Your issue is running the 2560 at 17 psi puts its compressor a bit outside its efficiency sweet spot. The tater compressor is more efficient at 17 psi (same size notwithstanding). Plus even the 0.64 turbine passes more gas than the 2560's.
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07-31-2012, 11:00 PM
#17
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If my car were mostly a track car I'd have gone with the 0.86.
However it's a street car. An extra 300 RPM of spool is very noticeable (10% of the powerband width) and worth the loss of 15 hp up top. (5% of peak power)
However it's a street car. An extra 300 RPM of spool is very noticeable (10% of the powerband width) and worth the loss of 15 hp up top. (5% of peak power)
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08-01-2012, 12:59 AM
#18
2860 maxes out around 18-19 psi . I haven't seen anyone any higher on that turbo then 310rwhp (which is fast as ---- not). But i've seen a couple 2560's around the 298-305 mark. both on mustang dynos on built 1.8+
Sorry to be a downer but i just don't see spending the cash to grab ~10 hp up top. I mean technically the 2860 has 10% more potential top end but the .64 is just so maxed that it's more like 5%. If it were me i'd try and return/sell and either grab a .86 2871 or wait it out on the new cool turbos and see where those new efrs end up.
Sorry to be a downer but i just don't see spending the cash to grab ~10 hp up top. I mean technically the 2860 has 10% more potential top end but the .64 is just so maxed that it's more like 5%. If it were me i'd try and return/sell and either grab a .86 2871 or wait it out on the new cool turbos and see where those new efrs end up.
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