Joined
·
93 Posts
Ok, for those of you on the se-r mailing list, you already know the story. But here it is again, with an update:
Last weekend I installed a Hotshot Header on my spec V. So I took it to a dyno on Thursday to see my gains. What happened was shocking. I dyno'd 145.9 HP and 154.9 lb-ft of torque. That is with a JWT pop, VRS exhaust, Hotshot Header, and removed balance shafts.
The really bad thing was that the dyno place layed that graph on top of my last dyno run. My last dyno run was with a JWT pop and VRS exhaust. On that run, I put down 148.2 HP and 158.1 lb-ft. So with the removed balance shafts and header, I LOST HP and torque. Something is definatly wrong.
I think something has been getting worse and worse since I've had the car. My original dyno run when stock was 143.3 HP and 155.6 lb-ft of torque. So my initial gains from intake and exhaust weren't that big, but I didn't think it was too bad. But now, with the current mods, it's obvious something is wrong.
My theory was that the fuel pressure regulator was bad. So today I went to check the fuel pressure. So my first question is, does anybody know how in the hell to disconnect the fuel line from the fuel rail? It has some type of weird clip that, according to the service manual, requires some special dealer tool to remove. Well, I hate dealer tools, so is there any other way to get it off?
Because I couldn't get the fuel line off to check the pressure, I decided I would try a different method. My brother also owns a spec V, so I swapped fuel pump assemblies with him. That includes the pump, fuel filter, and fuel pressure regulator. I was praying that my car would feel much quicker, thinking this would be the problem. Well, it didn't make a difference. And it didn't make my brother's car feel any slower either So now I don't know what to do.
I'm looking for suggestions on what else to try. Some things to note are the following:
Since about March I have been experiencing problems when starting. The car cranks excessivly when starting some times. Almost as if the fuel line is not pressurized. I do not know if swapping the fuel pump assembly changes this, as it has only been swapped for about 2 hours. I will find out later this week.
I have also been trying to install an RPM switch to change the opening time of the intake runners. This switch was not in my car last time I dyno'd, but it was this time. The way I have it hooked up is it is spliced into the main power, ground, and crank pos sensor wires going into the ECU. The VIAS wire between the ECU and the VIAS solenoid is cut, and the switch wire from the RPM switch is connected to the VIAS wire on the solenoid side.
The O2 sensor has been relocated to after the secondary cat. I have no MIL codes.
Also, a glasspack was added between the downstream O2 sensor (now located after the secondary cat) and the muffler to make the car quieter. The glasspack is straight through.
Those are the absolute ONLY things I can think of that have changed on my car. If anybody has *any* suggestions at all of what to try next, please let me know.
Last weekend I installed a Hotshot Header on my spec V. So I took it to a dyno on Thursday to see my gains. What happened was shocking. I dyno'd 145.9 HP and 154.9 lb-ft of torque. That is with a JWT pop, VRS exhaust, Hotshot Header, and removed balance shafts.
The really bad thing was that the dyno place layed that graph on top of my last dyno run. My last dyno run was with a JWT pop and VRS exhaust. On that run, I put down 148.2 HP and 158.1 lb-ft. So with the removed balance shafts and header, I LOST HP and torque. Something is definatly wrong.
I think something has been getting worse and worse since I've had the car. My original dyno run when stock was 143.3 HP and 155.6 lb-ft of torque. So my initial gains from intake and exhaust weren't that big, but I didn't think it was too bad. But now, with the current mods, it's obvious something is wrong.
My theory was that the fuel pressure regulator was bad. So today I went to check the fuel pressure. So my first question is, does anybody know how in the hell to disconnect the fuel line from the fuel rail? It has some type of weird clip that, according to the service manual, requires some special dealer tool to remove. Well, I hate dealer tools, so is there any other way to get it off?
Because I couldn't get the fuel line off to check the pressure, I decided I would try a different method. My brother also owns a spec V, so I swapped fuel pump assemblies with him. That includes the pump, fuel filter, and fuel pressure regulator. I was praying that my car would feel much quicker, thinking this would be the problem. Well, it didn't make a difference. And it didn't make my brother's car feel any slower either So now I don't know what to do.
I'm looking for suggestions on what else to try. Some things to note are the following:
Since about March I have been experiencing problems when starting. The car cranks excessivly when starting some times. Almost as if the fuel line is not pressurized. I do not know if swapping the fuel pump assembly changes this, as it has only been swapped for about 2 hours. I will find out later this week.
I have also been trying to install an RPM switch to change the opening time of the intake runners. This switch was not in my car last time I dyno'd, but it was this time. The way I have it hooked up is it is spliced into the main power, ground, and crank pos sensor wires going into the ECU. The VIAS wire between the ECU and the VIAS solenoid is cut, and the switch wire from the RPM switch is connected to the VIAS wire on the solenoid side.
The O2 sensor has been relocated to after the secondary cat. I have no MIL codes.
Also, a glasspack was added between the downstream O2 sensor (now located after the secondary cat) and the muffler to make the car quieter. The glasspack is straight through.
Those are the absolute ONLY things I can think of that have changed on my car. If anybody has *any* suggestions at all of what to try next, please let me know.