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Jul 22, 2011 | 07:51 AM

jt76

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From: Buffalo NY

TC78 owners come in!

I am working on picking a turbo for my stock cube truck manifold build. How much power are you guys making with this unit? What is it's power potential on stock cubes? Thanks guys

Jul 22, 2011 | 08:05 AM

HydroStream6

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From: Rochester, NY

I went 136 mph on a TC76 (same power pretty much) in my heavy *** GTO.

Jul 22, 2011 | 08:06 AM

JAX04

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From: Indy

Hellbent made over 800 to the tire with one. I have no numbers on mine.

Jul 22, 2011 | 08:14 AM

Tally TransAm

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guessing im right around the 580 mark on my TC76 at 10#s. traps 134

Jul 22, 2011 | 10:00 AM

Orange99Z

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I made 536 @ 6.5#, pump gas & meth, EPP/Brute Speed cam. Trapped 129 @ about 8#. Full weight f- body, t56, 9"

Jul 22, 2011 | 10:11 AM

Dean95z28

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Mine trapped 130, with the eBay kit in my fat pig. I think that was on 12psi.

Jul 22, 2011 | 10:17 AM

Orange99Z

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Forgot to mention that was ebay kit. Switched to truck manifolds & 6.0 but haven't been to the track yet

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Jul 22, 2011 | 12:45 PM

code4

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I went 9.8 on my 347/tc78 @ around 3500 # race weight

Jul 22, 2011 | 12:51 PM

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Tally TransAm

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From: Tallahassee, Fl

Quote:

Originally Posted by jt76

Impressive! My friend's TA traps around the same with about 100 more wheel hp than you with some bullseye T6 turbo on a 347. What is your race weight? More info on your setup?

raceweight is 3445.

stock shortblock. 317's, ls6 cam, applicable other ****

Jul 22, 2011 | 01:42 PM

#11

Nitroused383

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From: Washington

Honestly you're better of with the 76gts if you have a decently modded n/a motor. For a stock engine the tc76 works great. With better heads, intake and cam the 76GTS spools the same and makes more power over the tc turbos.

Jul 22, 2011 | 01:45 PM

#12

HydroStream6

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From: Rochester, NY

Quote:

Originally Posted by Nitroused383

I wouldn't say spool is the same. It's close, but the TC definitely spools quicker.

Jul 22, 2011 | 02:30 PM

#13

SPRAYED 01

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I did 675whp,15psi, through a 9 inch and auto. 3800lbs went 133mph. Awesome turbo imo.

Mines for sale too!! Barely used $750 shipped!!

Jul 22, 2011 | 02:34 PM

#14

BLINGOLE

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From: lakeland floirda

574 at 10 lbs, 9 inch amd a 3500 stall.

Im dieing to turn the boost up with my new forged motor.

Jul 22, 2011 | 03:17 PM

#15

jt76

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From: Buffalo NY

Quote:

Originally Posted by Nitroused383

I plan on a forged motor (rods, pistons) a decently bumpy FI cam and possibly TFS 220 heads if i dont cheap chooch out and go with 317s. Would it be in my best interest to go with a PT 76gts? I am open to any and all suggestions. A friend who build a pretty fast turbo car even suggested i go with a PT88 (t4, .96 a/r) but i think i may run into fitment issues as my KYTP kit is built around a TC78.

Jul 22, 2011 | 06:10 PM

#16

Tally TransAm

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i did and still do want a 76gts. they will definitely support more. i got a great deal on my TC which is why i have it now, and based on what its doing now at 10#s im 100% confident it will meet my goals (9.90's 6speed)

im 110% happy with my TC76, but if you have the extra cash i would go with the 76gts

Jul 22, 2011 | 06:19 PM

#17

MUSTANGBRKR02

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I thought the GTS was not sold anymore and they replaced it with the another unit 7675CEA(billet) or 7675HPHS?

Last edited by MUSTANGBRKR02; Jul 22, 2011 at 06:26 PM.

Jul 22, 2011 | 06:32 PM

#18

Tally TransAm

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Quote:

Originally Posted by MUSTANGBRKR02

I thought the GTS was not sold anymore and they replaced it with the another unit 7675CEA(billet) or 7675HPHS?

not sure, i think your correct though

Jul 23, 2011 | 01:37 AM

#19

Nitroused383

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7675 is just the new numbering system Precision uses, it's still the same 76GTS. 83mm inducer and 75mm exducer on the turbine wheel. NicD has gone 151 mph on the 76GTS with a 346 at 3400lbs. You won't see a TC76-78 do that, the precision unit is good for atleast 125 rwhp. Several people have made over 900rwhp with the 76GTS. You honestly cannot buy a better turbo for it's size. It has a bigger turbine wheel that flows more and a slightly larger more efficient compressor cover.

I do all my own tuning and have tons of logs to show you the spool comparison on my setup. They both hit the wastegate at 2600-2800 rpm in 4th gear.