hustler's "driver shame" thread - Page 18 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 09-16-2009, 12:50 AM   #341
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Any thoughts on timing with 93-octane and rolling back a few degrees when I run in ok, vs tuning on 91-octane and having even more headrom? I'm a little worried about tracking the car in ok when I could have detonation and never really know.
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Old 09-16-2009, 01:49 AM   #342
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ohh bitch u rant a rant about det cans wtf are yours lolololol....don't hurt me...
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Old 09-16-2009, 02:00 AM   #343
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You could buy a couple can of Toluene for the trip and just gas up next to the track. They used to have 93 next to the track atleast.

Chris
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Old 09-16-2009, 03:02 AM   #344
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Don't they usually have every kind of gas, including race gas at the track?
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Old 09-16-2009, 03:05 AM   #345
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Tune on 91. It's just a better idea. There is always that headroom.

Plus you save $1 everytime you fill up
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Old 09-16-2009, 10:56 AM   #346
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you can buy brass pipe stuff at home depot. just get three barb-to-male pipe pieces that match your hoses and a female tee. screw them together and dun.
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Old 09-16-2009, 12:38 PM   #347
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Quote:
Originally Posted by 18psi View Post
Don't they usually have every kind of gas, including race gas at the track?
I am tired of bleeding money on the car, like the idea of running pump, and it's one less logistics variable to consider. I hit mbt in every load cell way before detonation (minimum of 4*) so it may not affect power.
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Old 09-16-2009, 03:08 PM   #348
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Originally Posted by p51hellfire View Post
ohh bitch u rant a rant about det cans wtf are yours lolololol....don't hurt me...
It's hard to use them with a helmet on.
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Old 09-16-2009, 03:16 PM   #349
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hey speaking of, send me your det can setup.
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Old 09-16-2009, 04:07 PM   #350
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Quote:
Originally Posted by hustler View Post
It's hard to use them with a helmet on.
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Old 09-17-2009, 12:53 PM   #351
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Now I just have to bolt up the brake duct shrouds, check for leaks again, and drive to hallett.
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Old 09-17-2009, 01:04 PM   #352
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Sexy, very very sexy.


Needs more CAI though


Did you get your BOV vac line straightened out?
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Old 09-17-2009, 01:13 PM   #353
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How do you clean your windshield?
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Old 09-17-2009, 01:18 PM   #354
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How do you clean your windshield?
he uses pieces of that birdnest from his pass. side shock tower
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Old 09-17-2009, 02:18 PM   #355
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Quote:
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How do you clean your windshield?
the bikini crew washes it off for me while I "feel up." I'm going to put a header tank there soon.

The birdnest of wire may fix my fans later today.
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Old 09-17-2009, 02:20 PM   #356
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Quote:
Originally Posted by ZX-Tex View Post
Sexy, very very sexy.


Needs more CAI though


Did you get your BOV vac line straightened out?

I don't know that a CAI actually does anything on an intercooled car. Besides, Wagliardo already absconded with my cold-air box.

yes, the bigger hose helped immensly, but I have just a touch of flutter at 8psi or so.
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Old 09-17-2009, 02:20 PM   #357
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your rad cap leak? lol at the use of anti-freeze.

now send me your det can please.
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Old 09-17-2009, 02:51 PM   #358
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Quote:
Originally Posted by Braineack View Post
now send me your det can please.
I have a setup if you need it.
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Old 09-17-2009, 02:55 PM   #359
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Quote:
Originally Posted by hustler View Post
I don't know that a CAI actually does anything on an intercooled car. Besides, Wagliardo already absconded with my cold-air box.
Intercooled or not, it helps.

From SCC issue "10/2005"

Letter titled - "They" say dumb things

I just bought a 2004 SRT-4 and I wanted to change the factory intake. I was thinking about a cold-air intake, but I have heard from a few people that a cold-air will work the same as a short ram because the turbo heats the air to a constant temperature when it passes through anyway. Is this true? If you could give me some advice I would appreciate it. SCC is sick.

Answered by Dave Coleman

Dave goes on to explaint that:

"That hot-air-equals-cold-air theory is a steaming pile of cat poo wrapped in a thin veil of truth. the only true part is the turbo will heat the air anyway. The steaming cat poo comes right about the time "they" start saying the air coming out of the turbo is the same temperature regarless of the temperature going in."

"In the simplest terms, the air temperature actually increases a fixed amount going through the turbo. So if the turbo normally sucks in 60-degree air and spits out 160-degree air, sucking in 100-degree air will make it spit out 200-degree air."

"In reality, it's slightly worse than that. Actual temperature change across a compressor can be calculated with this arcane formula:"

Temperature Rise = (Tin*[pressure ratio^0.238 -1])/Compressor efficiency

"To make the arcane formula work you have to use absolute temperature on the Rankine scale for the inlet temp, which means you take Fahrenheit and add 460 degrees. So 60 degrees F is 520 degrees R."

"Pressure ratio is absolute pressure (boost plus 14.7 psi atmoshperic) divided by atmospheric pressure. So if you run 14.7 psi of boost, the pressure ratio will be 2.0. Let's use that 'cause it's easy. Then let's use 0.73 as the compressor efficiency, since I was born in 1973."

"In that particular case, the arcane forumla insists that air will come out of the turbo 128 degrees hotter than it went in (for a total of 188-degrees F). Now, if we increase intake air temperature to 100 degrees, the temperature rise is 138 degrees (again, a total of 238 degrees F). Air in went up 40 degrees, air out went up 50 degrees."

"In other words, cold air is important in any car, but it's even more important on a boosted one."


Phew - that was long, but sums it up, no?
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Old 09-17-2009, 02:59 PM   #360
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Mine still surges a tiny bit when I let off at light boost. Not a big deal IMO. Glad it helped. The Tial Q sounds great right? Not psssSSSSHHHHhhhhhhh, but PPSSSHHT!!!

On the CAI, not quite addressed by the above post... That does not discuss the effect of the intercooler, but merely the fixed temperature rise through the compressor, all else being equal. The IC offsets not having CAI partially, but not completely. This has been discussed ad nauseum in other threads.

At any rate, did not mean to start a thread jack. Back to Hustler's build.
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