Single Turbo RX-7's Questions about all aspects of single turbo setups.

Picture Tease of my DBB Billet PT 6765

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Old 04-18-11, 04:23 PM
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Talking Picture Tease of my DBB Billet PT 6765

here are some pics .. pt 6765 dbb with billet wheel . just thought i share
Attached Thumbnails Picture Tease of my DBB Billet PT 6765-img00098-20110418-1646.jpg   Picture Tease of my DBB Billet PT 6765-img00099-20110418-1648.jpg   Picture Tease of my DBB Billet PT 6765-img00100-20110418-1650.jpg   Picture Tease of my DBB Billet PT 6765-img00102-20110418-1651.jpg  
Old 04-19-11, 11:29 AM
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OMG! that thing is so sexy
Old 04-19-11, 02:26 PM
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Very nice!
Old 04-19-11, 03:36 PM
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Thank you!!! cant wait to see what it puts down
Old 05-08-11, 03:40 PM
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Gonna suck to put a filter of that
Old 05-09-11, 10:21 AM
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Is this installed yet?

Would love to hear about the results...

Chris
Old 05-09-11, 09:38 PM
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Very nice! Info on the rest of your setup??
Old 05-09-11, 10:22 PM
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U going down in turbo size, making more power and going faster! What the hell. How that sound!
Old 05-09-11, 11:19 PM
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Yep, it's a nice piece
Old 05-10-11, 09:14 AM
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^^^ Who built that manifold?
Old 05-10-11, 10:18 AM
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Originally Posted by KNONFS
^^^ Who built that manifold?

^^ Sean @ A-Spec. . .
Old 05-10-11, 03:05 PM
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Looks beautiful, hopefully I can have one of these on my car soon.
Old 05-11-11, 11:53 AM
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Nice set-up, looks similar to mine except the turbo.
Old 05-14-11, 05:25 PM
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Originally Posted by ChrisRX8PR
Is this installed yet?

Would love to hear about the results...

Chris
I will have results in about 2 weeks .
Old 05-14-11, 05:30 PM
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Originally Posted by ErnieT
Very nice! Info on the rest of your setup??
Thank you buddy.. Its goin on a Cosmo largest street port possible dowel pinned , polished ceramic coated lower and upper manifold, BDC ported throttle body, power FC , 1200 prime and sec injectors, snow performance stage 3 meth kit . i hope she hits 500 to the wheels . i really wanted a gt40 or bw . But i just got a steal on this turbo.
Old 08-26-11, 10:53 PM
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so far 430 at 14 psi stupid profec b puked on 2 diff units s we couldnt boost up.
Old 08-29-11, 08:53 AM
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isnt that turbo capable of 600+?
Old 08-29-11, 09:18 AM
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well do the math every psi is what 20 to the wheels? the turbo sweet spot isnt even there yet .. 20 psi pull should be at 500 easy
Old 08-29-11, 09:58 AM
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I'd check your math, if each psi is worth 20 whp, then 20 psi is only 400whp. I don't think it really works like that.
Old 08-29-11, 10:05 AM
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and not to mention that although with someones setup, they might have got 20hp with every psi raised, that was with a certain setup and a certain turbo, that does not mean that you will get 20hp to the wheels with any turbo you have and increase the boost.
and i was not doubting that the turbo and your setup cant hit 500 i was saying you should definitely be able to hit it cause i think that turbo can put out over 600whp on a rotary
Old 08-29-11, 12:34 PM
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Originally Posted by Cosmo_TT
and not to mention that although with someones setup, they might have got 20hp with every psi raised, that was with a certain setup and a certain turbo, that does not mean that you will get 20hp to the wheels with any turbo you have and increase the boost.
and i was not doubting that the turbo and your setup cant hit 500 i was saying you should definitely be able to hit it cause i think that turbo can put out over 600whp on a rotary
He's talking about volumetric efficiency and it varies with every vehicle and rpm. Typcial ranges on turbo rotary are 90-115% with 90% being stock port or lower rpms on a modified engine.

Should look something like this but with a bit more room due to the newer aero of the billet.

It's easily a 600rwhp rotary turbo if pushed.

That non-billet 67.8mm wheel is doing 80lbs/min which is around 600rwhp on rotary.
Attached Thumbnails Picture Tease of my DBB Billet PT 6765-gt4094r.gif  
Old 08-29-11, 12:44 PM
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Originally Posted by Cosmo_TT
isnt that turbo capable of 600+?
Without compressor map, we won´t know.
We know that EVO guys can produce some ridiculous power - over 900 HP@crank, MPH proven. So theoretically, flow rate for over 600 HP on rotary is here.

Problem is that this flow can be efficiently produced only at high pressure ratios. You can see the trend that these particular turbochargers are working best on small 2.0 engines. Not so much on larger types like RB26, 2JZ, or 13B rotary.

Best bet for utilizing most of this compressor would be stock port engine, 12a if possible
Old 08-29-11, 12:44 PM
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Originally Posted by Alpha-7
so far 430 at 14 psi stupid profec b puked on 2 diff units s we couldnt boost up.
That's very respectable.

I'd say you are probably around the upper end toward 115 percent (decent sized SP).
Attached Thumbnails Picture Tease of my DBB Billet PT 6765-14-psi.gif  
Old 08-29-11, 12:52 PM
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Originally Posted by Liborek
Without compressor map, we won´t know.
We know that EVO guys can produce some ridiculous power - over 900 HP@crank, MPH proven. So theoretically, flow rate for over 600 HP on rotary is here.

Problem is that this flow can be efficiently produced only at high pressure ratios. You can see the trend that these particular turbochargers are working best on small 2.0 engines. Not so much on larger types like RB26, 2JZ, or 13B rotary.

Best bet for utilizing most of this compressor would be stock port engine, 12a if possible
I would argue that the flow can be achieved efficiently at lower PR but the most benifit over the non-billet is certainly higher PR with the improved aero.

I would say the BW compressors are worse than the GTX series for this fact and i see the PT line being closer to the Garrett wheels.

he's only moving around 55-60lbs of air and that is smack dead in the sweet spot of a GT4094.

Now it's not the exact same compressor but they are not going to drastically be different.

430rwhp is damn good for any turbo at 14psi and can be seen due to the 75-78 pecent island he's prolly float'n around on his billet wheel.

He's doing good and is on track for some serious power.
Old 08-29-11, 06:22 PM
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its a cosmo motor huge race ports ... ill have pics and sheets prob on friday.. i got a blitz DSBC so well crank the boost up def its pinned so it ll handle it . and thanks for the good words


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