Stage IV Evo 8 with FP Red 408 Pump - 509 Race whp
Oct 5, 2008, 10:20 AM
#17
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For anyone looking to run 20 psi on pump gas a green may be the better choice.
Running a ewg on a turbo like this starts to push the price closer to a full Gt35 turbo kit and takes away a lot of the bang for the buck factor.
AL
Oct 5, 2008, 10:24 AM
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AL
Oct 5, 2008, 11:44 AM
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Can this be resolved with other bolt on mods (i.e. exhaust manifold , intake manifold or ported cyl head) or is it just an issue with the turbo that cant be resolved and requires an external WG?
Oct 5, 2008, 12:58 PM
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Nice tuning work AL 
Havent run into the creeping problem before, my own car can run a pretty flat 19psi if I tell it to do so, but I run the Wors 3" o2 housing and DP on my own car, maybe that helps, either way dont really matter to most guys with Reds, if you got a red you will likely be running well over 20psi most of the time.
I have seen a couple of the atm dump housings, none of them seem to line up with the opening of the Turbine housing very well, and the flapper only opens about 20 degrees max lift on the stock or HP actuators so most all of the flow is at the wall of the WG passage in the turbine housing, and the hole in these dump O2's is centered over the flapper from what I can tell, leaving a big lip internally of the air to hang up on prior to making the sharp turn into the dump tube. This doenst matter if your set your boost high. If you are targeting very high boost then you wouldnt want that extra WG flow anyway.
Regardless, glad you got to tune one up!
Havent run into the creeping problem before, my own car can run a pretty flat 19psi if I tell it to do so, but I run the Wors 3" o2 housing and DP on my own car, maybe that helps, either way dont really matter to most guys with Reds, if you got a red you will likely be running well over 20psi most of the time.
I have seen a couple of the atm dump housings, none of them seem to line up with the opening of the Turbine housing very well, and the flapper only opens about 20 degrees max lift on the stock or HP actuators so most all of the flow is at the wall of the WG passage in the turbine housing, and the hole in these dump O2's is centered over the flapper from what I can tell, leaving a big lip internally of the air to hang up on prior to making the sharp turn into the dump tube. This doenst matter if your set your boost high. If you are targeting very high boost then you wouldnt want that extra WG flow anyway.
Regardless, glad you got to tune one up!
Oct 5, 2008, 01:06 PM
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Looking at the dyno graph, the pump gas HP curve keeps climbing all the way to 7500RPM while the race gas curve climbs to 500HP at 5700RPM and just stays there all the way to 7500RPM. Almost as if it has ran out of breath at 500HP. I assume more aggressive cams would bring more life to this particular car after the 5700RPM mark on race gas.
Oct 5, 2008, 03:04 PM
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Nice tuning work AL
Havent run into the creeping problem before, my own car can run a pretty flat 19psi if I tell it to do so, but I run the Wors 3" o2 housing and DP on my own car, maybe that helps, either way dont really matter to most guys with Reds, if you got a red you will likely be running well over 20psi most of the time.
I have seen a couple of the atm dump housings, none of them seem to line up with the opening of the Turbine housing very well, and the flapper only opens about 20 degrees max lift on the stock or HP actuators so most all of the flow is at the wall of the WG passage in the turbine housing, and the hole in these dump O2's is centered over the flapper from what I can tell, leaving a big lip internally of the air to hang up on prior to making the sharp turn into the dump tube. This doenst matter if your set your boost high. If you are targeting very high boost then you wouldnt want that extra WG flow anyway.
Regardless, glad you got to tune one up!
Havent run into the creeping problem before, my own car can run a pretty flat 19psi if I tell it to do so, but I run the Wors 3" o2 housing and DP on my own car, maybe that helps, either way dont really matter to most guys with Reds, if you got a red you will likely be running well over 20psi most of the time.
I have seen a couple of the atm dump housings, none of them seem to line up with the opening of the Turbine housing very well, and the flapper only opens about 20 degrees max lift on the stock or HP actuators so most all of the flow is at the wall of the WG passage in the turbine housing, and the hole in these dump O2's is centered over the flapper from what I can tell, leaving a big lip internally of the air to hang up on prior to making the sharp turn into the dump tube. This doenst matter if your set your boost high. If you are targeting very high boost then you wouldnt want that extra WG flow anyway.
Regardless, glad you got to tune one up!
I cant see anyone seriously buying a red and wanting to run less than 23 psi so I doubt it would be an issue for most users.
I hope to try it out on a different car and see if it can go as low as 20 psi with different mod set up.
IMHO the best bang for the buck killer turbo there is as evidenced by the 9.7 @144 pass Tom Powel made today.
Al
Oct 5, 2008, 03:16 PM
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what is this fixation with running 20psi on pump? tune the car for 30psi on pump and boost creep won't be an issue. the customer can always run 20psi creeping to 23 without worrying about anything. in addition, if there was ever an overboost event on pump you'd be covered since it was tuned to 30psi. is there some stock ecu/map resolution issue as to why you can't tune pump to 30psi, since i know you can just lower the timing to appropriate values to make such loads safe?
Oct 5, 2008, 10:32 PM
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i run 26psi stock ecu stock block.....i think 25-28psi is its efficency range on pump....race gas is a hole diffrent story.....need a buschur race core so i can really turn the boost up on pump
Oct 5, 2008, 10:38 PM
#30
It's whatever the car is comfortable with. Some cars are more knock prone than others. That being said, I would think without other issues, a car should be able to run more than 20 psi on a Red with 93 in the tank (if all standard supporting mods are in place).