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.

 

That looks very healthy!
How much boost?

 

Thanks. 16psi

 

It's.......right there

lol

Looks great btw

 

Love that torque curve, or should I say plateau.

 

That kraken mani magic and the 3" dp baybeee, Im so excited to get my stuff!

His new dps are made out of 2mm 316L SS. Serious ****. (Top pipe in picture compared to the old alloy on bottom)

 

Huh.

When did that switch happen?

 

all i see is 2 pipes. lol

i get that one is thicker, which is good, but from the pic they look the same to me.

 

He updated within the past couple days. There are two dps in the pic, top one is slightly brighter metal, otherwise it looks the same from that angle.

https://www.thebalance.com/type-316-and-316l-stainless-steel-2340262

 

added real dyno pulls from todays runs.

 

Sweet dude! I'm still waiting on Kraken parts.

Lets see videos!

 

It's good, but a GT2860rs (disco potato) with a 0.86 rear housing can achieve that sheet.. just.

Dann

 

yeah at full tilt at 20+ psi.
6258 not even sweating with 100 more hp to go.
And it spools faster.

 

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

 

Wait. What? He could have that power at 3k? I don't follow.

 

100whp@3000rpm. Ie, same outright numbers, same low rpm torque.

Dann

 

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.

 

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

 

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.

 

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.