1.6L 205whp;210lb/ft
 

205.4 whp @ 6200 rpm 210.5 lb/ft @ 4700 rpm 16psi of boost

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what do you think guys? you're the experts

here's the set up:

ENGINE
1600cc in-line four cylinder, 16 valve DOHC Turbocharged and Intercooled
T3 (45v3) roller bearing turbo
Greddy E-Manage Blue
Greddy Pressure Sensor
Aeromotive Fuel Pressure Regulator
460cc injectors (RX7 NA)
Walbro 190lph in-tank fuel pump
HKS Manual Boost Controller
VR4 front mount intercooler
Mazda GTX Blow-Off Valve
K&N air filter
Mazdaspeed Low Temp Thermostat
Custom cold air intake
Custom 3” mandrel bent exhaust
Custom 2” stainless steel mandrel bent intercooler pipes
Custom 8AWG grounding kit


DRIVETRAIN
Limited Slip Differential
Exedy Racing Tri-puck Clutch Disc (ZD11T)
Exedy Racing Pressure Plate (ZC04T)


EXHAUST
HKS Super Dragger 3” Turbo Muffler
Custom 3” stainless full exhaust
Custom 3” stainless flexi-muffler

205 @ 16 psi?

Seems like there's a restriction somewhere. Look how the torque plummets after ~4600.

Deffinately something holding it back.
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How did you get the 460cc injectors to work with the Emanage blue?

+1 to the previous posts.

Greets

The 45v3 is technically a T28, with the same compressor wheel as me but a smaller turbine....Since it's off an R33 I assume it has at least a .63 a/r turbine. In any case, the boost is either not holding to redline or the turbine is too small.

Were you not getting any knock at 15:1 AFR ~3k rpm? That turbo should've been making a reasonable amount of boost at that point... enough to shake up your engine. Your AFR is pretty much a roller coast ride from start to finish.

Here's Arkmage's pull - similar turbo

well if you look at his pull. his turbo doesnt even seem to spool untill 3.5k for some reason.

yeah, that graph's all sorta of weird. small'ish turbine, spooling late, choking up top... sure there's not a potato in the tailpipe or something? :-)

My vote is a boost leak that doesn't open up until the boost comes on really strong.

Double check all your couplers and take another turn on them. I hope you're using T-bolt clamps. Also, source another MBC, swap it in and pull it on the street to rule out the MBC being bad.

That turbo shouldn't have a problem holding 16psi to redline.

I don't see any MAP indications... unless it's assumed due to the lack of power on the bottom end. You'd think a boost leak that bad wouldn't be able to produce a peak 16psi. :confused:

Did you ease it to 3500 or was it wide open? My gt28 isn't peaky like that at all.

Is 16 psi really what it takes for us (1.6ers) to get 200 whp? I was hoping less...

10-12psi = 200whp

Everyone's setup is different around here. Couple guys got right up to 250 at 15 psi.

Vash-

cough13psicough.

You might want to clear your throat there Braineack. lol

I agree. 15 AFR is getting on the lean side

It's lean, but drops just as soon as the boost hits where it could be detrimental.

i still blame the turbine or wastegate control. based on your TQ number I assume you hit 15psi and it instantly dropped to 12 or so.


here's my old 11-12psi run. stock ecu, FMU for fuel, bipes to retard timing.

http://www.boostedmiata.com/dynos/11psi_dyno.jpg

this was with a really restrictive exhaust.....remember, our turbos are nearly identical. you lost nearly 40tq between 4700 and 6200. I only lost 15.




Actually, what's the 5.8 ratio? That's supposed to match the axle gearing...I assume it was third gear based on the number they have inputted. You would be at 5.72:1 if they do use overall. 1.330 trans and 4.3 final. That will lower the numbers some, but only a few HP.

yeah looking again, the spool is nearly identical, but your tq drops. either your 3" exhaust is actually 2" or you need better boost control. But you should not be spooling this late with your exhaust. I spool 1000rpms soon now to the same psi with my 3" exhaust.

check our runs here together, you can see how similar they are, where you hit 15psi, but its obvious it drops off...or something is choked.

http://www.boostedmiata.com/dynos/scott_vs_marlon.jpg

my guess would be an exhaust leak between the head and turbo... it explains the late spool and the poor flow in the top end

thank you guys for all your inputs. I would take a look at the exhaust, maybe its really holding back the turbo...

by the way, the exhaust side of the turbo was divided into 2 chambers, exhaust on the wastegate and exhaust on the turbine like this...

Attachment 213239

do you think guys this is causing the hold back?

the small pipe is the exhaust side of the wastegate which exits just below the block while the bigger pipe is the exhaust side of the turbine which goes all the way to the muffler

another shot of the turbo and exhaust

Attachment 213238

did you just take that picture? looks like a bad leak.

it obvious it's not the exhaust; so it's either a leak in the exhaust, a clogged cat, or bad wastegate control. Are you just using a MBC?


how does the actuator rod bend? looks odd, shock brace is blocking the view.

I agree- you've got a WAY bad angle on your actuator rod. Mine wasn't that bad when I got my turbo and I had problems. Basically had to cut up the compressor mount and correct the angle so the rod is perpendicular to the rear of the can (or as close as possible).

well if you look close it comes out of the can perfectly straight...

this picture was taken a few days after the install which is about a year or so. I already fixed this by making a copper gasket.

I don't have a cat-back exhaust...as can be seen here. But I do use a MBC the HKS Universal VBC

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this is how the actuator rod looks like in a different angle

Attachment 213231

yes, I forget to mention this pull was done in 3rd gear. revving the engine at 2000 rpm, enough to spool the turbo (& not to stall the engine)..then pulling all the way to 6000+ rpm

im sticking with my not holding boost theory.

why does the turbo look so "sooty"? That actuator rod is gnarly. The pivoting arm on top looks to be rotated 180 (should point towards the driver's side?)

Looks to me like your O2 clamp is coming in too late.

Never seen an actuator rod with that much funky angle.. I vote for replace actuator for better alignment with flapper arm.

ghettocharger

Hustler, He is making over 94 HP. :bowrofl:

try getting a aftermarket wastegate acuator?

hahaha

:confused:

Don't bump 7 month old threads.