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Old 02-20-2014, 04:58 AM   #41
PEI330Ci
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Originally Posted by Commanderwiggin View Post
Nice! I'm not familiar with the TFX cylinder pressure equipment
You mean you've forgotten about it; I've been openly advocating it's use for years.

http://forum.e46fanatics.com/showthr...x#post11622115

http://forum.e46fanatics.com/showthr...x#post12869462

http://forum.e46fanatics.com/showthr...x#post13595166

http://forum.e46fanatics.com/showthr...x#post13906914
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Old 02-20-2014, 05:58 AM   #42
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Haha nice, whats the cost like for one of these setups?
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Old 02-20-2014, 08:33 AM   #43
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Haha nice, whats the cost like for one of these setups?
Approximately $3500 for the logging system, and about $1100-1300 per sensor. So figure $6k for a system that watches intake port pressure, cylinder pressure, and exhaust port pressure in real-time. Add more logging for multiple cylinders, and a couple more sensors and you're easily at $10k.

The only down side is how much you need to cut up a cylinder head to install this stuff.
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Old 02-26-2014, 09:43 AM   #44
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Maybe I worded that wrong. I am aware of the larger divided housings flowing similar to a smaller A/R open housing from when we changed from an open manifold to a divided. We have tested every 66mm open and divided turbine housing that Precision makes on my car and the built motor car!
I know you are aware Mike. I was just clarifying for the rest of the class!
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Old 04-11-2014, 01:56 AM   #45
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...so we will begin to lean on the built motor car shortly. It is an absolute beast on the street. Right now it is in the low 600whp range on pump gas.
Any more updates on this?

I'm thinking if dropping the turbo from 6766 .81 A/R undivided to say a 6466 1.00 undivided would render me similar results on the current setup (all in the name of an even earlier powerband)
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Old 04-11-2014, 10:35 AM   #46
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Any more updates on this?

I'm thinking if dropping the turbo from 6766 .81 A/R undivided to say a 6466 1.00 undivided would render me similar results on the current setup (all in the name of an even earlier powerband)
Changing to the 6466 will yield some spool time increase if all else is kept the same. The divided 1.00 A/R is slightly larger than the undivided .81 A/R so there will be a slight change in spool time there in the other direction.

If you're going to crank up the boost, you'll take advantage of the 6466 Gen2 CEA in terms of power output (let's say over 25psi). However, the 6766 Gen1 CEA will be a bit more efficient in the lower boost levels (say under 20-25psi). I can't give an exact boost level where one will be better than the other as boost is relative to the supporting mods and motor characteristics but those give you a rough idea.

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Old 04-11-2014, 05:02 PM   #47
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... If you're going to crank up the boost, you'll take advantage of the 6466 Gen2 CEA in terms of power output (let's say over 25psi). However, the 6766 Gen1 CEA will be a bit more efficient in the lower boost levels (say under 20-25psi)....
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Thanks Reid. Anthony should chime in here... not sure if my setup is good for over 25 PSI.

As for the A/R, I got inspiration from your previous post

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To properly compare the A/R of an undivided and a divided housing, you have the equal the playing field. A quick way to do this is to subtract .11 from the divided A/R to give you a rough equivalent of an undivided manifold.

Example: Take the turbine housings available for any PTE 66mm turbine wheel (6266, 6466, 6766). Then take the T4 divided 1.00 A/R as our example. The equivalent correction (again, by roughly subtracting .11) would put that 1.00 divided A/R to an equivalent .89 undivided A/R. The equivalency makes it more relatable to the T4 undivided.81 A/R.
However I'm assuming If I'm targeting the same power levels with the 64 I should order a bigger (say .96) than .81 A/R that's with my current 67.

Also was wondering why they have the Gen2 on most smaller turbos but not the 67.
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Old 04-11-2014, 05:20 PM   #48
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Thanks Reid. Anthony should chime in here... not sure if my setup is good for over 25 PSI.

As for the A/R, I got inspiration from your previous post



However I'm assuming If I'm targeting the same power levels with the 64 I should order a bigger (say .96) than .81 A/R that's with my current 67.

Also was wondering why they have the Gen2 on most smaller turbos but not the 67.
The turbine wheels are the same between the 6466 and 6766 so I would keep it the same unless you have a reason to need a divided turbine housing.
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Old 04-12-2014, 04:08 AM   #49
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Is there a gen1 and gen2 of the 6466?
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Old 04-12-2014, 05:41 AM   #50
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The turbine wheels are the same between the 6466 and 6766 so I would keep it the same unless you have a reason to need a divided turbine housing.
I don't really need a divided housing but just want to move the power band to the left even more hence my downgrade thoughts. But since I wanna maintain the power levels I was thinking I need a bigger A/R with the slightly smaller turbine.
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Old 04-12-2014, 05:45 AM   #51
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Reid , do you have any info on 6766 cea 2 and 7168 cea 2 are these in development atm ?
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Old 05-14-2014, 04:14 PM   #52
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New Precision 6466 Turbocharger

Quote:
Originally Posted by dragosid View Post
I don't really need a divided housing but just want to move the power band to the left even more hence my downgrade thoughts. But since I wanna maintain the power levels I was thinking I need a bigger A/R with the slightly smaller turbine.

I like the 6266 Gen 2 which good for 800 crank horsepower and would move the power to the left considerably ... U might lose some top end hp but on a street car that's not a big deal. U would be at 700 wheel with it for sure... And the car would be a very good driver... I am considering it in the near future on my 10:5:1 motor...
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Old 05-14-2014, 10:51 PM   #53
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New Precision 6466 Turbocharger

Now if ur really looking for something big.... Saw this baby in a GTR specialty shop in Dubai

Click image for larger version

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Old 05-15-2014, 04:50 PM   #54
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Now if ur really looking for something big.... Saw this baby in a GTR specialty shop in Dubai

Attachment 558432

LOL ... that was a PT106 IIRC
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best 1/4 mile (ST2) 11.77'@123mph 1.9' R/T on Toyo R888 295/30/19
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