respecthewankel

I'm running a gotham racing half bridge, and an AEM EMS, along with a methanol injection kit. A local guy is selling a Precision T71-GTQ for sale, with a tangential .96 A/R undivided exhaust housing. It is new in the box, the price is amazing, but will this turbo be a good fit for my car? Being a half bridge and going to a large turbo it's obviously not my daily driver anymore, but I do intend to drive it lots on the weekends and maybe once a week to work if the weathers nice, so I don't want to have some huge lagmaster turbo. Is anyone here using this? When does it start to make boost? How's the efficiency at low boost levels?

modrx7

iTrader: (1)

Sounds like a match made in heaven... you might want to get a divided housing though, because it will help the spool

dvls-7

ditto...
You'll like that turbo. Im also planning on getting a Precision unit those guys really know their stuff.

Crusader_9x

its only goona help spool if you have good divided equal length manifold to g with it.

respecthewankel

My issue, does anyone even make a divided turbine housing for a GT-Q trim exhaust wheel?

modrx7

iTrader: (1)

isn't it just a t4 so why couldn't you have one made, or buy a hks one?

Infini IV

A lot of places can have any turbine housing machined to fit the GTQ wheel. You can also contact Precision, as they would probably have turbine housings in stock.

Mike_REW

iTrader: (2)

Yes, the standard P-trim exhaust housing is machined out to accept the GTQ turbine wheel.

This additional labor justifies the additional cost of this setup versus the standard P trim stuff.

--Mike

Rx_treme

Carx7 had his backside milled out for the GTQ wheel b/c he needed it divided.. it ended up cost right around $700 including the cost of the backside (was a divided .84) he also had a ball bearing center section made tho too. he gets 19 psi by 3700ish on a street port.

I opted for the pt67 gtq .81 undivided and i get 19psi by about 5000 on my stock port RE.

sub-zero

I have heard from many People that runnning a un-divided housing on a divided mani works better then the divided housing? You will not notice nay difference.

carx7

iTrader: (31)

Everything I have read from experienced people on this forum suggested divided/divided is the way to go. Precision only sells undivided housings as they claim it makes more power and doesn't help spool. I disagree, but really have no proof, so that's hard to argue. Also, when I talked to .... Harry I think... at Precision he did say that their expereince with more power from undivided is specifically related to piston motors, and we all know that rotaries behave very differently.

I wanted to do a dyno comparison with the two, but since I run a 4" DP it's kinda hard to justfity the cost of a undivided housing just to prove which one makes more power.

As for the spool of my turbo, I am very happy, and am convinced that the .84 housing and GTQ wheel are good for more than 500RWHP, so I don't see a reason to go bigger. The difference in spool time between my turbo and rxtreme's could be explained with several differences: divided housing, BB CHRA, 4" exhaust vs. 3", tunned length manifold (I can't remember what he runs), and SP motor. I would guess it's the combination of all that, rather than one component that results in faster spool.

-Chris