400rwhp Stock Motor.
02-10-2009, 02:44 AM
#26
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I drive my buddies' 600 hp Lightning on occasion - 4 speed auto tranny and that thing absolutely rips. Best part of the auto in that thing is you can be sipping your energy drink with one hand while laying waste to a 600cc super sport bike, no problem. For the miata, don't know if I'd ever want an auto - this car is all about the driving experience.. but if I ever owned a 'dyno queen' built for the highways I would be all about a built auto.
-Ryan
-Ryan
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02-10-2009, 06:23 AM
#27
Angle Grinder
Get a cutting wheel and a grinding wheel. Don't mess with a friggin dremel to do the engine bay mods. Every swap guy needs to cut the ears out of the engine bay and widen the engine bay. This is what we use. I have a B&D from walmart, but they're all good enough.
Pat,
You do realize you're losing power with the filter right off the compressor housing, right? I watched a before and after dyno session on a 600+whp DSM where the owner was testing intakes and intake positions and he baselined with the filter right off the compressor. After he moved it forward a foot and built a small shield to stop it from sucking in turbine heat he picked up mid 20s whp.
Frank
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02-10-2009, 09:09 AM
#28
What about going with an air:water intercooler and a big "ice bucket" vs. an air:air if you're doing drag racing? That seems like an easy way to keep the air temp down and make some more power.
I think the majority on the forum are missing out on some free power because of this... including me. Isolated intake air box ftw.
I think the majority on the forum are missing out on some free power because of this... including me. Isolated intake air box ftw.
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02-10-2009, 09:18 AM
#29
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Pat,
You do realize you're losing power with the filter right off the compressor housing, right? I watched a before and after dyno session on a 600+whp DSM where the owner was testing intakes and intake positions and he baselined with the filter right off the compressor. After he moved it forward a foot and built a small shield to stop it from sucking in turbine heat he picked up mid 20s whp.
Frank
You do realize you're losing power with the filter right off the compressor housing, right? I watched a before and after dyno session on a 600+whp DSM where the owner was testing intakes and intake positions and he baselined with the filter right off the compressor. After he moved it forward a foot and built a small shield to stop it from sucking in turbine heat he picked up mid 20s whp.
Frank
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02-10-2009, 04:05 PM
#34
I see there are several variations on the GT30. Some are bigger, some are smaller, and that varies with the A/R of the turbine selected. With my GT3271, the compressor and turbine are very well matched. I follow that dotted line that goes right up the middle of the island almost exactly with my setup.
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02-11-2009, 09:09 AM
#36
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Haha, i already have a front-mount and all the piping. I will just have to get a bigger one. It would take quite a large amount of water to make that power without an intercooler. However, it would be pretty awesome if i could manage to make the power without it. People around here would take water injection a bit more seriously imho.
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02-18-2009, 11:40 PM
#37
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Ok, I've been thinking about my turbo choice dilemma. At this point, I am leaning more towards a gt2876. It will flow about 48lb/min. That should put me where I need to be. Also, it will probably spool faster than the 3076.
However, I was wondering which exhaust A/R to go with. I guess I don't fully understand how to decide. I would like to go with the .64 if it will flow what I need to. Also, this will let me keep the t25 flange and internal gate therefore keeping my manifold and downpipe.
However, I was wondering which exhaust A/R to go with. I guess I don't fully understand how to decide. I would like to go with the .64 if it will flow what I need to. Also, this will let me keep the t25 flange and internal gate therefore keeping my manifold and downpipe.
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02-19-2009, 12:16 AM
#38
You need to do more research before you go picking a turbo. 100% decide on an ultimate power goal and go from there.
That turbo map might peak to the right at 48 lb/min running exactly 2.5 bar, but.... Odds are, you'll never get in that region of the map. You have to do the math and calculate what your PR is at a given flow, and see where you end up.
I'm gonna find a badass site and post the link in a sec.
ALSO: The turbine is the main thing that dictates how much power you make. See the efficiency plot on the compressor? Know what that really means? The compressor takes a certain amount of power to compress a given mass flow of air to a certain pressure ratio for a given mass flow rate. I could actually do the math if you want as we're doing this kinda stuff in thermo II right now.
But basically the more air you try to compress, the more you try to compress it, and the less efficient your comp is at a given point, the more power it takes. Again, the more power it takes... Keep thinking about that.
That power comes from the turbine. It's the boss. It makes the rules. If you need 30 HP to drive the compressor and the turbine is sized to do 22HP, you ain't gonna get 30.
Anyways, I'll find that link and post it in a sec.
That turbo map might peak to the right at 48 lb/min running exactly 2.5 bar, but.... Odds are, you'll never get in that region of the map. You have to do the math and calculate what your PR is at a given flow, and see where you end up.
I'm gonna find a badass site and post the link in a sec.
ALSO: The turbine is the main thing that dictates how much power you make. See the efficiency plot on the compressor? Know what that really means? The compressor takes a certain amount of power to compress a given mass flow of air to a certain pressure ratio for a given mass flow rate. I could actually do the math if you want as we're doing this kinda stuff in thermo II right now.
But basically the more air you try to compress, the more you try to compress it, and the less efficient your comp is at a given point, the more power it takes. Again, the more power it takes... Keep thinking about that.
That power comes from the turbine. It's the boss. It makes the rules. If you need 30 HP to drive the compressor and the turbine is sized to do 22HP, you ain't gonna get 30.
Anyways, I'll find that link and post it in a sec.
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