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Whats the difference between the 76gts and the 76/75?

Old 12-01-2012, 05:29 PM
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Default Whats the difference between the 76gts and the 76/75?

I'm looking at a 76gts turbo. Is it the same as the current PTE 76/75?
If not what are the differences. I've heard nothing but good things about the 76/75.
Can anyone recommend anything else I should look at. I need something that will make 800whp on my LQ9 with a T56
Old 12-01-2012, 09:20 PM
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Same turbo, old name is GTS. If you get the CEA billet wheel its slightly better.
Old 12-01-2012, 09:35 PM
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Is the 76/75 capable of making 800rwhp?
Old 12-01-2012, 10:25 PM
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^^yes
Old 12-01-2012, 10:27 PM
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Tthats what I like to hear.
Old 12-01-2012, 10:32 PM
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Originally Posted by Texhotrod593
^^yes
What did the setup consist of?
Old 12-01-2012, 10:40 PM
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I'm running an 05 lq9 short block with the ls2 style bottom end. CNC ported ls2 topend with ARP cylinder head studs and ls9 gaskets.
Old 12-01-2012, 11:19 PM
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Pm sent
Old 12-02-2012, 02:54 PM
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Is there a big difference between the ball bearing Billet wheel unit and the older cast wheel with a journal bearing.
I found a deal on a brand new Ball bearing billet wheel unit but the cost is much more then the GTS I'm looking at. Almost $700 more. Is it worth the extra coin ?
Old 12-02-2012, 02:59 PM
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Originally Posted by 02sleeperz28
What did the setup consist of?
For what it's worth my 98 SS with a stock bottom end 5.7, 241 heads@10.33:1 compression, 227/224 .578"/.563" 114+2 cam, PT7675@15-16psi, LS6 intake, stock TB, 4L80E, 3.55 rear gears and a 3800 stall went 6.47@113mph in the 1/8th@3900lbs+.

To go that MPH in the 1/8th at that weight is 700rwhp+ and more like 750rwhp. It still had a lot left in it and would of probably went 116mph with 20psi which would of probably been all it had to give. Best 60' was 1.47 on that pass. If I could guess 20psi would of been well over 800rwhp and probably closer to 825-850rwhp.

I also never turned this set-up higher than 6100-6200rpm and now that I have experience with making a lot of power with these stock bottom ends, I would feel comfortable spinning it 6600rpm where that cam would of peaked and wanted to be shifted at. Would of been worth some more E.T. and mph if I had. It's not that hard to make these set-ups go fast, just takes some planning and seat time once it's built.
Old 12-02-2012, 05:23 PM
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Originally Posted by Martin@Tick
For what it's worth my 98 SS with a stock bottom end 5.7, 241 heads@10.33:1 compression, 227/224 .578"/.563" 114+2 cam, PT7675@15-16psi, LS6 intake, stock TB, 4L80E, 3.55 rear gears and a 3800 stall went 6.47@113mph in the 1/8th@3900lbs+.

To go that MPH in the 1/8th at that weight is 700rwhp+ and more like 750rwhp. It still had a lot left in it and would of probably went 116mph with 20psi which would of probably been all it had to give. Best 60' was 1.47 on that pass. If I could guess 20psi would of been well over 800rwhp and probably closer to 825-850rwhp.

I also never turned this set-up higher than 6100-6200rpm and now that I have experience with making a lot of power with these stock bottom ends, I would feel comfortable spinning it 6600rpm where that cam would of peaked and wanted to be shifted at. Would of been worth some more E.T. and mph if I had. It's not that hard to make these set-ups go fast, just takes some planning and seat time once it's built.

Not to thread jack or anything, how long did the motor stay together at that power lever?
Old 12-02-2012, 06:08 PM
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Dont worry about that. I like to know too.
Still not sure about paying the extra $700 for the BB CEA version
Old 12-02-2012, 06:49 PM
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I have the older GTS with a billet wheel/journal bearing on a 370. It makes 690-700 RWHP at 15psi. I turned it up to 17psi and it made 743 RWHP but the fuel system was done so I turned it back down and havent made any changes since. Not sure how much more power the turbo has in it but this is through a 4l80e and a 14 bolt truck rearend.
Old 12-02-2012, 07:56 PM
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Well since we have a nice little 7675 results thread going on here I'll add. My 5.3 with a 224/228 cam and a 7675CEA made 717whp on 17lbs through an unlocked 4L80E and LS1 intake. Trapped 141 in a 3500lb car with 23lbs after the 1/8th. Ported heads,better cam, and a LS2/90, and 25lbs hopefully equals a bunch more power this spring.
Old 12-02-2012, 09:51 PM
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Originally Posted by 02LS1ram
Not to thread jack or anything, how long did the motor stay together at that power lever?
It never popped. It's still together sitting in a shop in KY somewhere

I was too chicken to run it in the 1/4 afraid it would blow it's load so I just ran it in the 1/8th as hard as I could.

Mine was a cast wheel BTW....

Video of a high 6 second pass on 10lbs of boost:

http://youtu.be/OQd4D4He_pQ?t=48s

It being as heavy as it was it took a while to get the timing dialed in where I thought it was still safe for the fuel/boost I was running and still getting it down the track in the first 330' as quickly as possible. It ran hard out the back, but until the last month I owned it I was too chicken **** to really turn the timing up down low and get it run a number hence why no videos of the 6.47 pass. It would run 6.60's@112 all day long though with a mild tune-up.
Old 12-02-2012, 10:43 PM
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Originally Posted by fastcars95
Is there a big difference between the ball bearing Billet wheel unit and the older cast wheel with a journal bearing.
I found a deal on a brand new Ball bearing billet wheel unit but the cost is much more then the GTS I'm looking at. Almost $700 more. Is it worth the extra coin ?
Nope not really worth it in my opinion. Cast wheel or billet etc on a 7675 will make plenty of power. On a 5.3-5.7 that piece will make(max) somewhere in the 900-1000rwhp range if the setup is right. in the 6.0 sizes it will work in beast mode but might not quite make that power before the turbo maxes out. You should be no problem maxing past 800rwhp with your setup. Make sure the tune is spot on
Old 12-03-2012, 09:17 AM
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We've done 850+ rwhp on two jy 5.3 setups with the billet 7675, I'm sure one is over 900rwhp now also, just haven't dyno it again with it turned up.
Old 12-03-2012, 10:23 AM
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Originally Posted by fastcars95
I'm looking at a 76gts turbo. Is it the same as the current PTE 76/75?
If not what are the differences. I've heard nothing but good things about the 76/75.
Can anyone recommend anything else I should look at. I need something that will make 800whp on my LQ9 with a T56
I had one on my 370 (9.8:1) with a TU1 cam, insta-spool and will easily get you that power. Probably be great for a 6 speed car.
Old 12-03-2012, 07:58 PM
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I got a smoking deal on the billet ball bearing version. Time to turn up the boost and see what she can do.
Old 12-03-2012, 08:15 PM
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Private purchase or did you get it from a dealer? Nice score.

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