rtboy10

Just wondering why you suggest not using the aem regulator?

staylor725

Seems like the aem regulators dont like to hold fuel pressure around 60psi.

braeden

Is that with the internal orifice changed to the largest diameter? or the stock unit (unopened)?

skinsfn36

Would love to see the dyne of this turbo! Nice setup

staylor725

Tired all of them, with the bigger orifice it was the worst.

ninetysixyenko

No issues with the cooler it's self, but I still have fairly high oil temps, but I think there is 2 culprits at work here: 1) my oil temp sensor is about 3" away from the turbine housing, and the only oil flow it sees is the turbo feed, 2) It hugs my AC condensor pretty closely, and when my A/C is on is when I see the highest oil temps.


I never received a dyno sheet, just took a picture of the screen on some of the last pulls, but the pictures' qualities suck. This turbo spooled very early and climbed fast. VTEC isn't set to engage until 4800. The turbo started making 10-11PSI at 3000 and we pretty much held it there until it went onto high cam, and it spikes almost instantly to 15PSI on low BC duty cycle. From there we started turning the BC duty up gradually and we start getting pressure droops around 7000 with 100% BC duty and from 7000-9000 it gradually falls off to 13.5PSI. When we had VTEC at 3600, Boost was almost uncontrollable, it would hit boost cut (17.5PSI) almost as soon as it went onto high cam with no BC duty cycle. between this and the fact that the car is at 4200-4300 at highway speeds, we opted for a 4800 VTEC engagement. This turbo wants to spool fast and hard. The BW waste gate is a pretty crappy design, though, to get 10PSI spring pressure, the actuator needs to be fully preloaded, and only opens the Wastegate about 1/3 of it's potential stroke. When the preload is backed all the way off, you can barely make 7PSI with maxed out BC duty. We spent a good 6 hours the first night of tuning just figuring out where the WG preload wanted to be, we recieved quite a bit of help from Jason at CNC with this. This is the main reason I am getting a Turbosmart dual port actuator. Jason had also recommended this or the Full Race Billet dual port.


Tired all of them, with the bigger orifice it was the worst.
[/quote]


The second day of tuning, we actually had issues with the AEM FPR from high fuel pressure. My tuner had wanted 60PSI base fuel pressure (almost 80 under boost), and we kept losing fuel pressure up top. Finally I ripped the regulator apart and found the diagphram had blown sideways, I repaired it and did a few more pulls where it did it again. I took it apart and repaired it a second time, and we turned base fuel pressure down to 45PSI (low 60s under boost). Haven't had an issue with it since. I thought I was for a while, because my fuel pressure would drop 10-15PSI at idle once the motor/engine bay/surge tank became hot, but this ended up being a faulty fuel pressure gauge (liquid filled). Still haven't had any issues with the regulator since turning base pressure down to 45PSI. I already plan on buying a Radium Bosch regulator though if it fails again.

staylor725

Tired all of them, with the bigger orifice it was the worst.
[/quote]


The second day of tuning, we actually had issues with the AEM FPR from high fuel pressure. My tuner had wanted 60PSI base fuel pressure (almost 80 under boost), and we kept losing fuel pressure up top. Finally I ripped the regulator apart and found the diagphram had blown sideways, I repaired it and did a few more pulls where it did it again. I took it apart and repaired it a second time, and we turned base fuel pressure down to 45PSI (low 60s under boost). Haven't had an issue with it since. I thought I was for a while, because my fuel pressure would drop 10-15PSI at idle once the motor/engine bay/surge tank became hot, but this ended up being a faulty fuel pressure gauge (liquid filled). Still haven't had any issues with the regulator since turning base pressure down to 45PSI. I already plan on buying a Radium Bosch regulator though if it fails again.
[/quote]



Seems like we had the same problem not sure what you mean by the diaphragm had blown sideways and how you repaired it. My base was around 45psi with no vacuum going to it add 15psi of boost, fuel pressure goes up to 60psi holds for a few seconds then drops to 50 psi. When I was running single pump with stock lines it was dropping to 40 psi, we took apart the regulator tried all different orifice's seemed to be the worst with the big orifice and we thought the pump was going bad. Replaced oem hanger with fb dual pump hanger walbro 450's new lines same problem still. Now I'm going with a Weldon external regulator, don't want to lose a engine because my regulator can't hold 60psi.

Redline S2K

Nice numbers and super clean car. Definitely sold on going wrinkle black when I redo my engine bay this winter.

hvAlfaWant_S2000

^^

Doing wrinkle black on my extra cam cover this week! thanks op!

ninetysixyenko

Tired all of them, with the bigger orifice it was the worst.
[/quote]


The second day of tuning, we actually had issues with the AEM FPR from high fuel pressure. My tuner had wanted 60PSI base fuel pressure (almost 80 under boost), and we kept losing fuel pressure up top. Finally I ripped the regulator apart and found the diagphram had blown sideways, I repaired it and did a few more pulls where it did it again. I took it apart and repaired it a second time, and we turned base fuel pressure down to 45PSI (low 60s under boost). Haven't had an issue with it since. I thought I was for a while, because my fuel pressure would drop 10-15PSI at idle once the motor/engine bay/surge tank became hot, but this ended up being a faulty fuel pressure gauge (liquid filled). Still haven't had any issues with the regulator since turning base pressure down to 45PSI. I already plan on buying a Radium Bosch regulator though if it fails again.
[/quote]

Seems like we had the same problem not sure what you mean by the diaphragm had blown sideways and how you repaired it. My base was around 45psi with no vacuum going to it add 15psi of boost, fuel pressure goes up to 60psi holds for a few seconds then drops to 50 psi. When I was running single pump with stock lines it was dropping to 40 psi, we took apart the regulator tried all different orifice's seemed to be the worst with the big orifice and we thought the pump was going bad. Replaced oem hanger with fb dual pump hanger walbro 450's new lines same problem still. Now I'm going with a Weldon external regulator, don't want to lose a engine because my regulator can't hold 60psi.
[/quote]

We were actually dropping pressure down into the low 30s, when it should have been close to 80. When I say the diagphram blew sideways, I mean the orange rubber and metal diagphram on the bottom of the spring inside of the regulator was actually cocked off to the side both times I took it apart. By fixing it, I repositioned it where it should be.

I am probably going to get Radium's Bosch 43.5 regulator regardless, because I also don't want to blow a motor, but I am holding off on it until this winter when I have time to redo some of the fuel lines.