jimmyv13

I've been hunting around for a turbine housing for my Turbonetics 60-1 and found a guy that is selling a new Precision housing that is less than 1/2 of the cost of a new Turbonetics turbine. Are there any issues in using a different brand of turbine housing on any particular turbo?

Thanks.

RacerXtreme7

iTrader: (2)

Nope, it'll work fine. T4 based turbo is a t4 based turbo, be it Garrett (the rest are just Garrett copies), Turbonetics, Innovative Turbo Systems (ITS), Precision, Master Power, Rotomaster, AiResearch, BorgWarner, etc etc. If its T3/T4 frame based then all the parts are interchangable granted you match turbine/compressor trims. In other words, any damn turbine thats a T4 with a P-trim will fit.

~Mike...................

jimmyv13

Thanks Mike, I figured you'd be the first to answer. I got a PM from the seller stating:

Precision claims their housings flow better then Garrett and
Turbonetics housings due to a little better machining and casting processes, but
this could just be marketing.

Bukwild

Precision turbo does not just claim stuff they have the R&D from countless drag racers. A1 company in every way.

RacerXtreme7

iTrader: (2)

Its possible to be true. Garrett did some research and found that extrude honing their turbine housings will result in higher flow and better spool. They claim its like roughly going up 1 A/R size with better spool then the orginal A/R of the turbine that got extrud ported. Now, Precision must be using some smooth high dolar casting methods to see noticable gains. For what its worth, I'm running a Garrett 1.00 A/R turbine that has been extrude honed. No results or comparisons yet because the only other turbo on the car was stock and my car is yet running with the new turbo (engine isn't even done being built).

~Mike............

jimmyv13

Thanks for your input, Mike, I went ahead and got it. I paid $150USD for it including paypal fees and shipping. He has a bunch of turbines for sale, if anyone else is interested....I found him on the turbomustangs forum.

RacerXtreme7

iTrader: (2)

Thats a great price! Does it come with the V-band on it? Is the v-band welded on or cast into the turbine?

~Mike............

SilvioRX7

How much was the cost to extrude hone the housing?

RacerXtreme7

iTrader: (2)

Sorry, I don't have a cost for it. You can contact them through their website here -----> http://www.extrudehone.com/ . I got my housing direct from a Garrett engineer. It was a housing they "experimented" with. I don't have a part number for it even, its not a standard housing. It's standard t4 footprint, divided, tang, but it has a cast in 3.5" disscharge and V-band clamp. Its very robust, as I have never seen a v-band flange so thick and the v-band clamp so heavy duty. It's a conical type fit also rather then the usual flat butt fit. It's most likely a large diesel engine part, but like I said, I don't have a part number for it or how much it cost to have extrude honed. It's also been ceramic coated externally.

~Mike...............

The Griffin

I have a similar garrett hot side but a 0.84 divided/tang.T4 with a cast V-band.This one came off a 15yr. old ford diesel truck.I'm just trying to figure out where to get a matching clamp and flange.It too has a conical rear face on the v-band portion and very meaty cast V-band.Any ideas what v-band clamp will work. the turbine outlet is about 3-1/4" so would that be considered a 3.5" outlet? the outer diameter of the v-band cast is a little over 4".What size V-band would work?

jimmyv13

This one comes naked, so I'll have to get my V band welded on then ship it out to get coated. I have thought that if the coating is only on the outside of the part, then the heat will stay inside the metal and be worse off than no coating at all. Is it true that if there is only one face coated, it should be the inside to resist the heatsoak in the part?

crispeed

From my experience Precision is correct about their housings flowing better than Garrett.
The internal design of their housings are different than most of the others. You can actually see the difference. Also back pressure is much lower with quicker spool when comparing both housings of the same size.
As mention above Precision do a lot of R&D with racers. Most of the tricks that you would normally do to a regular turbine housing are allready available from Precision as standard.

RacerXtreme7

iTrader: (2)

I'll look on my turbo and see if the v-band has any type of numbers on it. I stopped selling Garrett turbos a few years back and all my literature is filed away some were. I'll see what I come up with.


I've been wondering this myself. I never had any reported failures/cracks, or sagging turbine housings with only being coated on the out side. But it does make sence that you'd be holding in the heat with an external coating only. But, you'd be doing the same thing with a turbo blanket. Coating in and out sounds optimal, but it takes away internal clearance between the turbine and turbine housing. Rotaries run hot as hell to begin with and when I did my builds I often added just a few thousands extra clearance to allow for turbine growth due to all the extra heat a rotary puts out. Best thing to do is ask both turbo builders who use the coatings and the coating specialist as well. Lastly, I'd really hate for a chunk of ceramic coating to come off the inside of a turbine valute and go through the turbine wheel. I'm running a really expensive Mar-M (withstands heat better then inconnel) GT-P turbine wheel from Innovative.

~Mike...........

The Griffin

Great, much appreciate the help.cheers

Bukwild

I fully agree with you because you can see the porting done on my backside and front cover clearly. PT is also warranteed for 1 year no questions asked. Can't beat that deal anywhere.

FarNorthMotoring

iTrader: (2)

Precision cast their own turbine housings, they are not just any housing out of the Garrett parts bin.

jimmyv13

I hear you on the internal coating coming loose and chucking the turbine wheel, that would suck butt. I'll probably get either a blanket or outer coating for the turbine, but then would it be worth getting the DP coated? I'm also considering coating my mani inside and out, but I'd hate for a piece to flake off and destroy everything. Since it's marginally hotter in the mani than the turbine, would the manifold be more suspect to flaking?

jimmyv13

The housing came in today and the v-band is cast into the part. I'm still up in the air about coating it though. I've been contemplating the turbine blanket, but it's about 3x the price and it seems to do the same thing as an exterior coating, which is to keep the heat inside the part.

What about a heat shield? Similar to the stock shields, but more along the lines of simply directing the heat away from the LIM, not bolted to the turbine itself.

RacerXtreme7

iTrader: (2)

Heat shield will work fine. Theres several comanies that make them, or you could make your own. It could be complex and wrap around the turbine or a simple flat shield between the LIM and turbine. I'd use stainless sheet or aluminum sheet.

reboot

hey could you please PM me the info on the housings? I have a .84 right now that I would like to go to like a .96. thanks

mjw

iTrader: (1)

If anyone is interested I have a brand new T4 Turbonetics P-trim, 1.0 divided, tang housing with the v-band cast onto the housing. I'll let it go for a good price, I had to get a Garrett housing because this one will not clear the frame rail with the HKS manifold I am using.. send me a PM if interested, sorry for hijacking the thread!

On the main topic though, Turbonetics housings are larger than a comparable Garrett (not internally though), ask me how I know.

Matt