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Slantnose from HELL
Join Date: Dec 2004
Posts: 811
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Lost my turbos
Last edited by GJF; 12-31-2017 at 03:36 PM.. |
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Crotchety Old Bastard
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I'm not Chris but it seems like a lot of work, parts, and $$ to change from twins to single turbo. I'd have your turbos rebuilt or take the opportunity to upgrade. Either way I'd stay twin.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
Posts: 10,861
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Big, twin turbos are a euphemism for what your car has swangin', so best to keep the deuce!
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,726
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Are you trolling us???!!! GJF asking for advice having the highest hp car in the forum. What is this world coming to?!?!
I vote for twin GT35R's like Bello. ![]() Or twin Precision 6262's? |
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Slantnose from HELL
Join Date: Dec 2004
Posts: 811
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Trolling naaaught! Just throwing out ideas. With the new GTX turbos being able to hit 1K with quick spool it had me thinking. Even F1 turbines with 60mm wheels sound appealing.... I still am leaning forwards the twins. I really don’t mind the fabrication if stay twins there will still be some fab work as I will probably go v-band on everything🤪
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Registered User
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I would stay in your place with both turbos and I would put the best of the planet! V-band, hot body in stainless steel and the reel fastest possible, In brief the best turbos.
![]() Last edited by Pat RUFBTR; 01-01-2018 at 03:36 AM.. |
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Brando
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I like twin too
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Turbo powa! 1977 911s. it's cool |
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E-85 sippin drunk
Join Date: Jan 2002
Location: Warner Robins, GA
Posts: 1,506
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If you are used to the older turbos, you will LOVE the new GTX versions!!! You need to water cool them though.... I learned the hard way.
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Brad...930 gt-1 racecar, increased displacement to 3.6L, JB racing Cylinders, JE 8 to1 pistons, stroked crank, Carrillo rods, extrudehoned 3.2L intake, full bay Bell I/C, GT-2 EVO cams, Rarly8 headers, GTX-35RS turbo, twin plug, P&P heads, Link G4 EFi system, G-50/50 with LTD slip and oil squirters/oil cooler, zork tube, full race coilover system, with carbon fiber body, full cage, E-85 sippin drunk |
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Registered User
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Thus just two small GTX3584RS on each side!
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E-85 sippin drunk
Join Date: Jan 2002
Location: Warner Robins, GA
Posts: 1,506
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I have one GTX3584RS on my engine... I can not imagine having two of them!!! good grief!! LOL
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Brad...930 gt-1 racecar, increased displacement to 3.6L, JB racing Cylinders, JE 8 to1 pistons, stroked crank, Carrillo rods, extrudehoned 3.2L intake, full bay Bell I/C, GT-2 EVO cams, Rarly8 headers, GTX-35RS turbo, twin plug, P&P heads, Link G4 EFi system, G-50/50 with LTD slip and oil squirters/oil cooler, zork tube, full race coilover system, with carbon fiber body, full cage, E-85 sippin drunk |
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,726
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Quote:
That's been my experience with newer designed turbos. |
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E-85 sippin drunk
Join Date: Jan 2002
Location: Warner Robins, GA
Posts: 1,506
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Quote:
But, rest assured that if you were to ride in GJF's car, I would bet that you could definitely feel the G forces during acceleration!!
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Brad...930 gt-1 racecar, increased displacement to 3.6L, JB racing Cylinders, JE 8 to1 pistons, stroked crank, Carrillo rods, extrudehoned 3.2L intake, full bay Bell I/C, GT-2 EVO cams, Rarly8 headers, GTX-35RS turbo, twin plug, P&P heads, Link G4 EFi system, G-50/50 with LTD slip and oil squirters/oil cooler, zork tube, full race coilover system, with carbon fiber body, full cage, E-85 sippin drunk |
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Registered User
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Mine is always in CIS and nevertheless my felt with the new turbo precision 6766 is more the same than with my former k27/29, it looks like almost an atmospheric big atmo to low rpm.
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Registered User
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 2,547
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Quote:
Stay twins for sure! Your engine setup is too trick to revert back to single, and the fabrication necessary to go with newer twins won't be too involved. Email me specifics on the engine (bore x stroke, CR, cams, redline, headers size, etc) and I'll reply with suggestions.
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Chris Carroll TurboKraft, Inc. Tel. 480.969.0911 email: info@turbokraft.com http://www.facebook.com/TurboKraft - http://www.instagram.com/TurboKraft |
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Registered User
Join Date: May 2005
Location: Loxahatchee, florida
Posts: 2,708
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Since i now live in town i would love to come by and see that beauty some time.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's. 05 Cayenne S lapis blue |
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,726
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Quote:
The low pressure ratio compressors put out maximum flow at low boost levels whereas high pressure ratio compressors put out maximum flow at high boost levels. It's all in their efficiency islands. My car has always been EFI, and the old school 60-1 HiFi (60mm) hit like a sledgehammer to your back at only 1 bar. My Holset HX40 (58mm) and Borg-Warner S366 (66mm) don't hit near as hard even at 1.4 bar. |
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
Posts: 10,861
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Slantnose from HELL
Join Date: Dec 2004
Posts: 811
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Dug in her a little more tonight. The passenger side turbo is damn near perfect. All within spec. I’m going to pull both turbos this weekend and box them up for F1 turbines and 60mm compressors. Just need to do some math and calculate air mass and flow rates off the head data.
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87 911 Carrera platform Twin Garrett's, Big Valve, Xtreme Cylinder Heads, JB Racing cylinders and machine work, custom JE pistons, GT2 EVO cams, GT3 oil pump, modified 3.2L intake, 80mm TB, custom Intercooler, equal length headers, DFI, KEP Stage 2 custom twin disc, G50 custom gear set, LSD, Tilton trans pump, Fluidyne cooler |
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,726
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What size wheel? I looked up F1 and seems to be Turbonetics designation that covers nearly all their wheel sizes.
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