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Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
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Never heard anything good about Precision.

Read they hand out new turbos that crap out to their sponsored cars like candy.
Old 12-05-2016, 05:35 AM
  Pelican Parts Technical Article Directory    Reply With Quote #41 (permalink)
E-85 sippin drunk
 
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Quote:
Originally Posted by Tippy View Post
Never heard anything good about Precision.

Read they hand out new turbos that crap out to their sponsored cars like candy.
Ut oh!! Well, I will do my homework that is for sure. I appreciate the feedback!
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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
Old 12-05-2016, 05:36 AM
  Pelican Parts Technical Article Directory    Reply With Quote #42 (permalink)
Chain fence eating turbo
 
Join Date: Dec 2008
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Don't get me wrong, they probably still lead in the hp and spool categories, but reliability sounds like they're at the bottom of the list.
Old 12-05-2016, 06:21 AM
  Pelican Parts Technical Article Directory    Reply With Quote #43 (permalink)
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Looks like the new gen 2 Garrett turbos are going to V-band, think that's the best direction to take to keep your options open. Oh jeez and I just finished up with the T4 conversion...
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75 930, 76 930, 83 SC EFI turbo
Old 12-05-2016, 08:57 AM
  Pelican Parts Technical Article Directory    Reply With Quote #44 (permalink)
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We recently completed HAMS' 930 and it had a Precision turbo, 6262 iirc. It was a source of friendly disagreement between Chris and myself because we've seen too many Precision turbos that were junk, compressor wheels contacting the housing, etc. He'd used them on his other cars, no issues. It has worked well on his build (3.45L EFI ITB), but not significantly better IMO than a GT35R such that I would spec one for my own 930.

Same for the BorgWarner EFR we just did. They spec'ed out their 35R-killer, it cost a lot more and was harder to fit, and didn't significantly out-perform our usual go-to setup.

We've now done 620whp on a 3.4L running e85, but if you've got a bigger engine or really hot build and need a bit more compressor wheel, Garrett has a new Gen-2 version with a larger compressor wheel inducer that will flow a bit more.
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Old 12-05-2016, 09:07 AM
  Pelican Parts Technical Article Directory    Reply With Quote #45 (permalink)
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V-band is the default configuration for the Gen-2 turbos in order to replace Tial turbine housings, but they are also available with T3 and T4 turbine housings, open throat or twin scroll.

We only tuned one 3.3L with their twin scroll v-band, and results weren't impressive. We're sticking with the 4-bolt inlet flanges for now.
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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
Old 12-05-2016, 09:10 AM
  Pelican Parts Technical Article Directory    Reply With Quote #46 (permalink)
 
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Thanks Chris, good to know the T4 isn't done yet!
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75 930, 76 930, 83 SC EFI turbo
Old 12-05-2016, 09:54 AM
  Pelican Parts Technical Article Directory    Reply With Quote #47 (permalink)
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I sourced my Garrett gt40 from Chris. He talked me into the billet wheel and I am reminded every time I get into boost how glad I am I listened to his advice
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88 930 3.4 ,Twin plugged billet Xtreme cylinder heads and denso COPs, Dougherty custom GT 2 evo cams,pauter rods,Garrett Gt40,ms3x Efi ,1100cc injectors,extrude honed 3.2 intake,TK billet fullbay I/C,MODE headers,KEP stage 2,E-85 706 rwhp
Old 12-05-2016, 01:43 PM
  Pelican Parts Technical Article Directory    Reply With Quote #48 (permalink)
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
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Quote:
Originally Posted by TurboKraft View Post
We recently completed HAMS' 930 and it had a Precision turbo, 6262 iirc. It was a source of friendly disagreement between Chris and myself because we've seen too many Precision turbos that were junk, compressor wheels contacting the housing, etc. He'd used them on his other cars, no issues. It has worked well on his build (3.45L EFI ITB), but not significantly better IMO than a GT35R such that I would spec one for my own 930.

Same for the BorgWarner EFR we just did. They spec'ed out their 35R-killer, it cost a lot more and was harder to fit, and didn't significantly out-perform our usual go-to setup.

We've now done 620whp on a 3.4L running e85, but if you've got a bigger engine or really hot build and need a bit more compressor wheel, Garrett has a new Gen-2 version with a larger compressor wheel inducer that will flow a bit more.
The 6262 is an absolute monster! I don't think highly of Precision, but I wouldn't kick it out of my bed if given to me.
Old 12-05-2016, 06:31 PM
  Pelican Parts Technical Article Directory    Reply With Quote #49 (permalink)
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Finished the turbo bracket, changed the flange on the drip can for the Garrett, and made a new sheet metal cover for the turbo. Now ready for new intake pipe openings...






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75 930, 76 930, 83 SC EFI turbo
Old 01-18-2017, 09:16 AM
  Pelican Parts Technical Article Directory    Reply With Quote #50 (permalink)
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Very nice, sir
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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
Old 01-18-2017, 09:34 AM
  Pelican Parts Technical Article Directory    Reply With Quote #51 (permalink)
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Thanks Chris, Can't wait to get this fired back up!!
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75 930, 76 930, 83 SC EFI turbo
Old 01-18-2017, 10:05 AM
  Pelican Parts Technical Article Directory    Reply With Quote #52 (permalink)
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Was able to work on this last weekend and made some more progress, decided to open it up a bit more at the turbo inlet. Fabricated a SS muffler bracket, fit up the muffler and had it welded it out.






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75 930, 76 930, 83 SC EFI turbo
Old 06-16-2017, 11:31 AM
  Pelican Parts Technical Article Directory    Reply With Quote #53 (permalink)
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75 930, 76 930, 83 SC EFI turbo
Old 06-16-2017, 02:13 PM
  Pelican Parts Technical Article Directory    Reply With Quote #54 (permalink)
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Welded up the collector, fabricated the muffler saddle, fabricated a new intercooler connection pipe as the offset was different. The list is getting shorter..





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75 930, 76 930, 83 SC EFI turbo
Old 06-22-2017, 10:31 PM
  Pelican Parts Technical Article Directory    Reply With Quote #55 (permalink)
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Beautiful work!!!
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88 930 3.4 ,Twin plugged billet Xtreme cylinder heads and denso COPs, Dougherty custom GT 2 evo cams,pauter rods,Garrett Gt40,ms3x Efi ,1100cc injectors,extrude honed 3.2 intake,TK billet fullbay I/C,MODE headers,KEP stage 2,E-85 706 rwhp
Old 06-23-2017, 01:38 AM
  Pelican Parts Technical Article Directory    Reply With Quote #56 (permalink)
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Thanks xbmwguy, Looked back at the date I started this thread and realized I need to step up progress on this the project. The challenge here has been tucking the bigger housing and extra waste gate up into place and out of view. Only so much room to work with...
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75 930, 76 930, 83 SC EFI turbo
Old 06-23-2017, 06:22 AM
  Pelican Parts Technical Article Directory    Reply With Quote #57 (permalink)
E-85 sippin drunk
 
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Shoot, it took me 15 years just to save up the money to redo my engine. So, I can completely feel your pain!!!! The job you are doing is impeccable !! Keep it up!!
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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
Old 06-23-2017, 06:32 AM
  Pelican Parts Technical Article Directory    Reply With Quote #58 (permalink)
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Wish I had a tig machine and could weld like that. I need to save up for a good tig machine and retire my mig. Beautiful work.
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-Dennis
1977 930 Slant, MS3 EFI, Carrera intake, Twin plug, Powerhaus headers, Magnaflow muffler, Garretson intercooler, GTX3071R
Old 06-23-2017, 08:51 AM
  Pelican Parts Technical Article Directory    Reply With Quote #59 (permalink)
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I'm lucky, have a awesome tig welder that works for me. I do all the fit-up and tacking then hand it off to the pro.
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75 930, 76 930, 83 SC EFI turbo
Old 06-23-2017, 09:00 AM
  Pelican Parts Technical Article Directory    Reply With Quote #60 (permalink)
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