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Old 02-11-2020, 04:07 PM
Vgk Vgk is offline
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Default kc38r vs kc300x

I am wondering how the kc38r ball bearing compairs with the kc300x journal bearing turbos compair ar and sizes being the same. all sizes being the same are the only differences the bearings? they use the same wheels and housings right? if so, whats your opinions on the two and would it be worth it to pay more for the ball bearing turbo? or would you rather have the jornal bearing one for a cheap rebuild option in the future? Im looking into the 63/73 turbos on both. probably .84ar
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Old 02-11-2020, 06:25 PM
Bmcgarvie Bmcgarvie is offline
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Have you emailed or called Kc turbos? They're are some of the most helpful people in the industry.
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Old 02-11-2020, 07:07 PM
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PSD POWER007 PSD POWER007 is offline
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And they say the KC 38r ball bearing is rebuildable
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2003 Ford Excursion Eddie Bauer 4x4 7.3L Powerstroke Forged with ARPís
Irate T4 364.5, Full Force 180/80's, Adrenaline HPOP, Driven Diesel RR, GH tuned Hydra, Sam Wyse stage 2, 6.0 Tranny cooler
2005 Ford Excursion Limited 4x4 6.0 Powerstroke
Coming soon KDD stage 1 long block, FF 155/30ís, KC stage 1, Driven Diesel RR, No Limit CAI, BPD HD oil cooler, Odawg stage 2
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Old 02-11-2020, 09:38 PM
Vgk Vgk is offline
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The kc38r is rebuildable but if I had to guess it would be more money to do it. I did answer my own question though. I saw on another thread that KC turbo chimed in on that the 2 are the same. Itís just the bearings that are different and the shaft to accommodate the bearings. He also said that with their testing the difference between the 2 turbos is almost zero so I would rather save the $300 and get the journal bearing one. So another question, who out there is running the kc300x 63x73? Thoughts? Stock stocks? Thanks guys
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Old 06-28-2020, 09:04 PM
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The KC300X is rebuildable too based on info from KC's website. I also debated the 2 and decided on the 300x66/73. It should be installed in a week or 2 so I will report back the results.
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2004 F550 with 2000 7.3, Forged. 205/80 FFD injectors, S&B intake, Diamond Eye 4" exhaust. 1023 Tuning. Stock Tranny, Stock Turbo (for now) KC300X66/73 coming soon. Pioneer, Kicker, and Memphis audio system with back-up camera.
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Old 06-29-2020, 11:55 AM
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have yall seen KCs 38r center section replacement? the way i understand it, if you already have a wore out 38r, you could buy KC's center section, slap the old covers on and go. basically have a stage 2 or 3 drop in for way cheaper than a full replacement.
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Old 11-21-2020, 03:01 PM
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Quote:
Originally Posted by 19.5s View Post
The KC300X is rebuildable too based on info from KC's website. I also debated the 2 and decided on the 300x66/73. It should be installed in a week or 2 so I will report back the results.
Any updates? Just toasted a fairly new 38r (with riffraff billet wheel). Wheel just came apart after about 3 years of good service. Truck is an 02 with stock injectors and tuned, its a dedicated tow rig. Looking at the kc options as well, was never really satisfied with the 38r for towing.

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2002 F250 4x4 ECLB auto w/ 3.73s. Air heater gone/ CAI / 4" dp to 4" exh. / zippo mod / Dp-Tuner live tuned / egt, boost & trans. guage
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Old 11-24-2020, 06:39 AM
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I have had a 63/70/84 for two years and I'm very satisfied with it. Charlie recommended that version based on I have a ZF5 and 3.55 gears (truck in sig). No smoke unless I'm not thinking, no staring at the EGT numbers and there is 6 or 7 psi by 1400 rpm. My previous turbo was a 38r; the 300X is noticeably more quiet and out preforms it in all scenarios.
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Old 11-24-2020, 07:44 AM
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Quote:
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I have had a 63/70/84 for two years and I'm very satisfied with it. Charlie recommended that version based on I have a ZF5 and 3.55 gears (truck in sig). No smoke unless I'm not thinking, no staring at the EGT numbers and there is 6 or 7 psi by 1400 rpm. My previous turbo was a 38r; the 300X is noticeably more quiet and out preforms it in all scenarios.
Good to hear, we ordered the 63/68-.84 this morning. I know my mother is looking forward to not constantly having to stare at egt Guage anymore. Not to mention will probably accelerate a little better too when they've got their TT hooked in tow.

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06-6.0l, CCLB 4X4, studded, reworked heads, egr gone, cab reroute, blue spring mod, 6.4 banjos, updated dummy plugs, stand pipe, and stc fitting; New oil cooler, New ipr, New icp, atlas 40 FICM, powermax turbo, and Geerhead tunes, 325/65R18

2002 F250 4x4 ECLB auto w/ 3.73s. Air heater gone/ CAI / 4" dp to 4" exh. / zippo mod / Dp-Tuner live tuned / egt, boost & trans. guage
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