NB2 EFR 6258 Kraken mani/dp
06-18-2018, 02:30 PM
#1
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NB2 EFR 6258 Kraken mani/dp
Real dyno, 10-11psi and 17psi.
Virtual dyno 15-16psi
Car:
02 NB2
EFR 6258 T25 .64ar
Kraken cast manifold / 3" dp
3" catless exhaust / big magnaflow muffler.
94 block, VVT head, Vics manifold
stock 1994 (8.8-9.0cr) pistons w/new rings
eBay rods w/arp bolts
ACL Race bearings stock size
MS3 Basic, FF640 injectors
93 octane gas.
Virtual dyno 15-16psi
Car:
02 NB2
EFR 6258 T25 .64ar
Kraken cast manifold / 3" dp
3" catless exhaust / big magnaflow muffler.
94 block, VVT head, Vics manifold
stock 1994 (8.8-9.0cr) pistons w/new rings
eBay rods w/arp bolts
ACL Race bearings stock size
MS3 Basic, FF640 injectors
93 octane gas.
Last edited by borka; 09-02-2018 at 12:35 AM.
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09-02-2018, 03:57 AM
#14
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No, I mean the whole graph, if that's your power graph you want a GT2860rs can do it at 18psi and have the same power at ~3000rpm.
If you're going to turn it up later, awesome.
Dann
If you're going to turn it up later, awesome.
Dann
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09-03-2018, 09:34 PM
#17
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and I'm sure they both idle at the same hp level as well.
I measure turbos by how soon i can hit 200lbs tq.
my 2560 hit it at 3250
my 6258 at 3300
my 2860 with begi manifold/dp at 3800.
2860 cant touch a 6258 spool wise, response, and max output wise.
I measure turbos by how soon i can hit 200lbs tq.
my 2560 hit it at 3250
my 6258 at 3300
my 2860 with begi manifold/dp at 3800.
2860 cant touch a 6258 spool wise, response, and max output wise.
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09-03-2018, 10:12 PM
#18
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First let me say that its a sweet build and I am not shitting on you, I just wanted to let people who read the thread know that your graph can be achieved on a 2860rs.
Looking at your VD you have 100whp@3000rpm, just like a Gt2860rs can have.
You have 180whp@4000rpm, just like a Gt2860rs can have.
You have 250whp@5000rpm, just like a Gt2860rs can have.
etc
You can do it in ftlb if you want, but it's like for like comparing HP at the same rpm also, as i have done.
You probably have a bit better transient response though. And i assume you will turn it up a lot further than a Gt2860rs can go, in the future.
Dann
Looking at your VD you have 100whp@3000rpm, just like a Gt2860rs can have.
You have 180whp@4000rpm, just like a Gt2860rs can have.
You have 250whp@5000rpm, just like a Gt2860rs can have.
etc
You can do it in ftlb if you want, but it's like for like comparing HP at the same rpm also, as i have done.
You probably have a bit better transient response though. And i assume you will turn it up a lot further than a Gt2860rs can go, in the future.
Dann
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09-04-2018, 10:10 AM
#19
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I sure would like to see real (Miata) data that supports this (and the other claims made in this thread). I agree that the compressor map for the 2860rs supports this, but I run a T28R 0.86 combo on my car, and there isn't enough exhaust energy to get the PR and flow rate required for the compressor RPM on my setup, turbo only.
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09-04-2018, 04:15 PM
#20
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GT2860RS, .86 housing, ~15psi. BEGi log mani, separated gas 2.5" DP down to a hacked up crush bent 3" straight pipe out the back.
I think I logged it, will post a log screen shot if I can find it.
note: it was a dyno day so they were just doing pulls after pulls, the date, test/file name is incorrect.
I think I logged it, will post a log screen shot if I can find it.
note: it was a dyno day so they were just doing pulls after pulls, the date, test/file name is incorrect.
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