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Old 01-24-2012, 03:34 PM   #161
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Ahh yeah that's the Faro arm, it creates points in space right within solidworks. I haven't measured my engine bay though, I'm not sure what sort of useful information I can get...perhaps the motor mount locations and the intercooler pipes? Shifter hole? Hmmm....

I guess now is the time to if I ever were to measure it. It's somewhat portable, I'd just need something flat and magnetic to attach it to so I don't have to make a mount. Maybe the middle of the cross member is flat enough. I'll take a look.
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Old 01-24-2012, 03:37 PM   #162
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Yes, middle of the crossframe should work great, then you model the interior dimensions of your engine bay, and start dropping in twin turbo's off the side's of the block and see how it fits!
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Old 01-24-2012, 05:37 PM   #163
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But I already ordered one Precision PT5858.
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Old 01-24-2012, 05:50 PM   #164
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Yea I know, but let me know if you ever do that rendering anyways! Twin internally gated 25R's or something. Hmm... think I know what I'm building next...
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Old 01-24-2012, 08:47 PM   #165
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I seriously thought about that, two GT2554R's. It would cost a few hundred more outright compared to the baller Precision stuff and cost more to plumb (and be more aggravating) but it would look cool. It's also been my personal experience that one properly sized single turbo works better than two properly sized parallel turbos.
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Old 01-24-2012, 09:09 PM   #166
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Quote:
Originally Posted by TurboTim View Post
It's also been my personal experience that one properly sized single turbo works better than two properly sized parallel turbos.
Totally agree with you there, but something's I like to do just for badassness; this would be one of them.
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Old 01-24-2012, 10:23 PM   #167
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Quote:
Originally Posted by TurboTim View Post
I seriously thought about that, two GT2554R's. It would cost a few hundred more outright compared to the baller Precision stuff and cost more to plumb (and be more aggravating) but it would look cool. It's also been my personal experience that one properly sized single turbo works better than two properly sized parallel turbos.
Don't tell that to the guys who designed the Veyron!
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Old 01-25-2012, 10:21 AM   #168
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OK I won't!

By your logic, if more, smaller turbos is better, I wonder why they didn't put 8 turbos on there, or 16?
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Old 01-25-2012, 10:34 AM   #169
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I think part of splitting up banks/cylinders into individual turbo's has to do with pulse timing optimization. I.E. same premise on which twin-scroll is based.

Packaging/exhaust routing constraints are probably another big one.
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Old 01-25-2012, 10:40 AM   #170
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I seriously thought about two GT2554R's. It would cost a few hundred more outright compared to the baller Precision stuff and cost more and be more difficult to do oil, coolant, and exhaust/intake pipes. The financial reasons above all are why I did not go with two or more turbos.
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Old 01-25-2012, 11:17 AM   #171
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Agreed, added complexity and cost of going twins never seems to be worth it for us aftermarket builders. Depends on your goals for the project as well. If it's a showcase of a badass design and build, seeing those twins would be pretty slick.
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Old 01-25-2012, 11:30 AM   #172
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I think the problem wit the twin turbo BP was that you had the wrong cylinders paired, or that there were just not enough pulses for the turbos to be happy like that.
Even if the veyron has 4 turbos, each turbo has 4 cylinders feeding into it.
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Old 01-25-2012, 12:13 PM   #173
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I certainly think you made a good choice in the one big turbo here. the veyron is certainly different in that its a w16, plus there has to be a sweet spot for the performance gain from turbos compared to the number of cylinders.

I don't know ---- about ----, I was just stating that to be the devil's advocate...not meant to be serious at all!
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Old 01-25-2012, 01:39 PM   #174
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The Veyron was also build just to show case what Bugatti could do with very little consideration to cost.
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Old 01-25-2012, 03:36 PM   #175
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5857 is not a big turbo. . nyah
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Old 01-25-2012, 03:52 PM   #176
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I won't need much to beat you cause you'll just be burning up your tires. 5858, not 5857 too.
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Old 01-25-2012, 05:39 PM   #177
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Sequential turbos?
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ABSURDflow Turbo KLDE Mazda V6 Thread-stagedturbos.jpg  
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Old 01-27-2012, 11:39 AM   #178
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I forgot to take pics of my sweet ignition stuffs I got from DIYAutotune a while back! I got their boost control solenoid too because my 10 year old GM solenoid is starting to stick.


Turbo arrived today. Precision PT5858CEA with ported S cover, ceramic ball bearing, billet wheel, ceramic coated vband turbine. The stainless turbine housing ETA is the middle/end of this summer, oh well. And I think I'm a precision dealer now








46mm EWG is backordered, should arrive in a few weeks.
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ABSURDflow Turbo KLDE Mazda V6 Thread-ignition.jpg   ABSURDflow Turbo KLDE Mazda V6 Thread-pt5858a.jpg   ABSURDflow Turbo KLDE Mazda V6 Thread-pt5858b.jpg   ABSURDflow Turbo KLDE Mazda V6 Thread-pt5858c.jpg  
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Old 01-27-2012, 11:43 AM   #179
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Curious. What's the a/r on the vband turbine housing? Also, how big is the inlet diameter?
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Old 01-27-2012, 11:51 AM   #180
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.82 a/r turbine. The inlet flange is about 2.050".

4" inlet, 2.5" outlet compressor.
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