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Twin Turbo 4.8 Results / Single 80mm Build

 
Old 10-03-2017, 04:13 AM
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All chinese turbos would scare me !
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Old 10-03-2017, 08:10 AM
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Depends on what you have invested engine wise. I don’t see the harm if you run a $500-1000 SBE long block. If I ran a “nice” engine I’d run the real deal. Turbos are a super simple design. With the much improved china machining these days they are getting good at cloning. Aside from less than stellar performance, I don’t see a huge risk. Esp. if you aren’t looking for massive power. The OP’s car is pretty impressive for a 4.8 that’s not leaving hard. 72’s in general are a bit large for a 4.8. I think he’d be into the 8’s easy with a big stall and hard launch.

The BW S480 clone seems to be a proven heavy hitter. Can pick one up for $750 shipped now. I got my calipers out and the exh wheel diameters and profiles are almost exactly the same as a genuine Borg. They really dropped the ball with the S366 clones and those weird clipped wheels IMO. I’m all for someone trying out a set, just wanted to make sure they were aware of the oddball exh wheel.
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Old 10-03-2017, 12:23 PM
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Originally Posted by Forcefed86 View Post
They have a really goofy clipped exhaust wheel that is nothing like a real S366. Kinda scares me.

The original s366's have a clipped wheel for more flow, but that wheel doesn't look like it needs it.
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Old 10-03-2017, 12:43 PM
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It's hard to justify big money on turbos when I paid $230 for the long block.
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Old 10-04-2017, 07:10 PM
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Originally Posted by svslow View Post
It's hard to justify big money on turbos when I paid $230 for the long block.
Yup blow up a shitbox JY motor send all pieces through some real turbos and you'll quickly think otherwise. I think spending anything over $1000 on a turbo is dumb, unless of course you do this for a living or you like to brag online.

Last edited by adamantium; 10-04-2017 at 07:15 PM.
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Old 10-12-2017, 09:19 PM
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Passenger side 72/68 started smoking yesterday... Haven't seen over 15lbs on mine. What a rip!

I had put a $250 bid on the new billet gt35 clones 2 days ago. I figured that meant they wouldn't' accept it so I was talking to Viren today. VS has a 67/65 and a 61/65 for great prices. I was all set to order one when the email came through that they accepted the my $500 offer on the Gt35's. Now I kinda feel bad. You should order the 61/65's and see how they do!
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Old 10-13-2017, 08:10 AM
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It's been raining non stop by me lately. Every time I've tried to go to the track its gotten rained out. I am planning to go next weekend and turn it up a little more just to see what it'll do.

I change my mind constantly about what to do with the turbos, but at this point anything would be better than these 72s. Been debating going back to a single after this experience, but I think the 61 or 67s would work much better.
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Old 10-13-2017, 08:51 AM
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Originally Posted by Forcefed86 View Post
Passenger side 72/68 started smoking yesterday... Haven't seen over 15lbs on mine. What a rip!

I had put a $250 bid on the new billet gt35 clones 2 days ago. I figured that meant they wouldn't' accept it so I was talking to Viren today. VS has a 67/65 and a 61/65 for great prices. I was all set to order one when the email came through that they accepted the my $500 offer on the Gt35's. Now I kinda feel bad. You should order the 61/65's and see how they do!
Just ordered a set of the 67/65 for my 5.3 with a Hurron Twin turbo kit on the way

We were gonna go with the on3 6165 but chose to use Virens product instead
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Old 10-13-2017, 09:06 AM
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Maybe someone here in this thread knows the answer to the question: If I swap out my Rev9 for a Viren 78/75, should the exhaust housing be a straight bolt in swap with my current downpipe setup?
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Old 10-13-2017, 09:16 AM
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Originally Posted by Tjabo View Post
Maybe someone here in this thread knows the answer to the question: If I swap out my Rev9 for a Viren 78/75, should the exhaust housing be a straight bolt in swap with my current downpipe setup?
Yeah they should have the same V-band on the turbine.
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Old 10-13-2017, 09:27 AM
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And probably at least close to the same positioning between the t-4 flange and V-band...?
Not that it really makes a difference I suppose. Just have to bite the bullet and do the work if it doesn't fit..
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Old 10-15-2017, 08:44 AM
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Originally Posted by Forcefed86 View Post
Passenger side 72/68 started smoking yesterday... Haven't seen over 15lbs on mine. What a rip!

I had put a $250 bid on the new billet gt35 clones 2 days ago. I figured that meant they wouldn't' accept it so I was talking to Viren today. VS has a 67/65 and a 61/65 for great prices. I was all set to order one when the email came through that they accepted the my $500 offer on the Gt35's. Now I kinda feel bad. You should order the 61/65's and see how they do!
Did you get a ballpark price for the VS's?

Originally Posted by svslow View Post
It's been raining non stop by me lately. Every time I've tried to go to the track its gotten rained out. I am planning to go next weekend and turn it up a little more just to see what it'll do.

I change my mind constantly about what to do with the turbos, but at this point anything would be better than these 72s. Been debating going back to a single after this experience, but I think the 61 or 67s would work much better.
Since right now i haven't started a kit or anything on my car i think single is still sounding better then running twins.
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Old 10-15-2017, 12:22 PM
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http://www.ebay.com/itm/T72-Universa...tZ0mtO&vxp=mtr

Anyone seen these? they have an option for Dual ball bearing and billet wheel. $308 each for the regular

Last edited by adamantium; 10-15-2017 at 12:29 PM.
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Old 10-15-2017, 12:58 PM
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Likely the same turbos Viren sells
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Old 10-15-2017, 01:15 PM
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Q trim 7268, doesn't that likely mean that they are essentially like the Rev9 7268s?
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Old 10-15-2017, 03:06 PM
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Originally Posted by Tjabo View Post
Q trim 7268, doesn't that likely mean that they are essentially like the Rev9 7268s?
Slight difference, bigger AR then the Rev9's, with the dual ball bearing im sure itll light quicker, since guys are stating they're lazy. Billet wheel also should help with power. Anyone have any first hand with the gt3582s?
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Old 10-15-2017, 03:51 PM
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I'd feel more confident that the billet wheel will move extra air more than I would be that the ball bearings will help spool response.

According to some podcast I heard with one of the big turbo guru guys, ball bearings don't improve spool time. The actual big advantage of them is that they can survive moments of insufficient oil flow at launch much better than journal bearings can. Wish I could remember who that dude is.....

Did you happen to contact them yet for their prices on those options?
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Old 10-15-2017, 04:42 PM
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Originally Posted by Tjabo View Post
I'd feel more confident that the billet wheel will move extra air more than I would be that the ball bearings will help spool response.

According to some podcast I heard with one of the big turbo guru guys, ball bearings don't improve spool time. The actual big advantage of them is that they can survive moments of insufficient oil flow at launch much better than journal bearings can. Wish I could remember who that dude is.....

Did you happen to contact them yet for their prices on those options?
Garret claims 15% increase in spool time on a regular ball bearing over journal bearing, im sure a dual ceramic ball bearing would help more.



https://www.turbobygarrett.com/turbo..._ball_bearings

Just PM'd em on ebay
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Old 10-15-2017, 07:13 PM
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Very interesting!
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Old 10-17-2017, 06:26 PM
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im curious what people think the cause of the rev9 7268s not making power is. aside from the oil leaking.
bad wheel design just making heat?
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