who makes the largest a/r bolt-on turbine housing?

vintagemuscle · Aug 28, 2006

I would just like to know between bullseye, PTE, Slowboy or any others which company has the most free flowing bolt-on turbine housings? My plan is to run a turbo capable of 55+ lb min. Will a bolt on housing really cause too much backpressure for a turbo of this size? I have read conflicting arguments about whether a bolt-on housing is efficient enough for a turbo of this size. I would really like to move to a t3 turbine housing but as of right now the cost of the new manifold and o2 housing is too expensive. I am thinking along the lines of a 60-1 with the stage V (p-trim) turbine wheel. Will this larger wheel help exhaust flow enough to efficiently run a 60-1 or similar in a bolt-on housing?

keymaster · Aug 28, 2006

Try the FP 3065, or go balls to the wall and get the 3575, I'm pretty sure they don't have any problems with flow on those two.

vintagemuscle · Aug 28, 2006

I would really like to go with the 3065 but for the price i could also go with a full t3 setup. I am really confused on what i want to do. Within the next couple months i will be pulling the engine for a scat/wiseco 2.0 rebuild and i really just need to figure out which turbo route i will be going. Thanks for the help.

Coup D E'Tat · Aug 28, 2006

FP or just go full T3. Most bolt-on stuff, while being "capable" of X power, isn't worth it.

tstkl · Aug 29, 2006

and if you read the stickes, you would have read the post by fp talking about how a/r is a ratio and has no bearing on size whatsoever. I could make you a 1.5 a/r turbine housing that flows less than a 6cm^2 mitsu housing.

people hear .xx a/r and think, thats bigger than .xx, so you can make more power on that one. Isn't the 6cm^2 turbine housing a .82 a/r anyways? THATS HUGE!!

http://dsmtuners.com/forums/showthread.php?t=199534
read post 15, and the one fp made before that too, and all the other posts in that thread. HELL, READ EVERY POST ON THIS ENTIRE SITE!!!!

LOL

seriously though, read what fp said in that thread.

and in case your really, really lazy:

god himself said:
So what does this number tell you about flow? By itself, ...nothing. This number is used to compare housings of similar castings with the only difference being the volute. Here is where I am going with this. Say you have a housing whose area is 1.45 in2 over a radius of 1.69 inches, that makes the A/R= .85. Well, say you have another housing whose area is 1.8 in2 over a 2.1 inches radius. Well, the A/R is still .85 so that means they flow the same ...right? WRONG! So what does that tell us? You cannot compare turbine housings between families just by the A/R. Reason I go into this is that I have people ask me all the time what the A/R of a FP30 housing is. Why? There is only one FP30 volute, so how is knowing what it's A/R is relevant? You can however compare the A/R between all T31 housings, or all T4 housing, etc.

and Im in the process of pricing out a 3065, the turbo alone is 1350, while the o2 housing and wastegate are another 600 minimum. Thats almost 2k, and theres no way to get around it. He might as well go full t3 if he is going to go fp. But fp kicks ass, so Im going with their turbo.

unlmtdndeavor · Aug 29, 2006

tstkl said:
and if you read the stickes, you would have read the post by fp talking about how a/r is a ratio and has no bearing on size whatsoever. I could make you a 1.5 a/r turbine housing that flows less than a 6cm^2 mitsu housing.

people hear .xx a/r and think, thats bigger than .xx, so you can make more power on that one. Isn't the 6cm^2 turbine housing a .82 a/r anyways? THATS HUGE!!

http://dsmtuners.com/forums/showthread.php?t=199534
read post 15, and the one fp made before that too, and all the other posts in that thread. HELL, READ EVERY POST ON THIS ENTIRE SITE!!!!

seriously though, read what fp said in that thread.

and in case your really, really lazy:

and Im in the process of pricing out a 3065, the turbo alone is 1350, while the o2 housing and wastegate are another 600 minimum. Thats almost 2k, and theres no way to get around it. He might as well go full t3 if he is going to go fp. But fp kicks ass, so Im going with their turbo.

fp IS kick ass. i went with their turbo, and im sure i helped inspire brian to get an fp setup as well.

if you want bolt on, fp is the way.

keymaster · Aug 29, 2006

In the process of looking at turbos that I can't afford right now, I'm truly torn on what I want to upgrade to. I'm looking for one capable of 400-450awhp. I like the 20g a lot, but not sure how much power it's capable of. On the other hand, I could get a T3 or T4 manifold and go full Garret for about the same price as a 20g. I really like the GT3071R turbo, and am starting to lean towards it.

IPT · Aug 29, 2006

Josh over at GRE performance has an HX40 on his EVO and has put down 540awhp using the BEP turbine housing. The HX40 is around 72lbs/min if I remember correctly.

93AWDTalon1 · Aug 29, 2006

What are the mods and boost on this evo?

vintagemuscle · Aug 29, 2006

tstkl said:
and if you read the stickes, you would have read the post by fp talking about how a/r is a ratio and has no bearing on size whatsoever. I could make you a 1.5 a/r turbine housing that flows less than a 6cm^2 mitsu housing.

people hear .xx a/r and think, thats bigger than .xx, so you can make more power on that one. Isn't the 6cm^2 turbine housing a .82 a/r anyways? THATS HUGE!!

http://dsmtuners.com/forums/showthread.php?t=199534
read post 15, and the one fp made before that too, and all the other posts in that thread. HELL, READ EVERY POST ON THIS ENTIRE SITE!!!!

seriously though, read what fp said in that thread.

and in case your really, really lazy:

and Im in the process of pricing out a 3065, the turbo alone is 1350, while the o2 housing and wastegate are another 600 minimum. Thats almost 2k, and theres no way to get around it. He might as well go full t3 if he is going to go fp. But fp kicks ass, so Im going with their turbo.

I have read the thread by FP and i know that a/r really doesn't tell you how much the turbine housing flows. I spent about 2 hours yesterday researching the topic. I used a/r to reference size in a bolt-on housing just so people knew what i was talking about.
Now, besides FP i take it all of the bolt-on housings are just too small and will hurt topend performance on a larger turbo.
I have although seen low 11 second timeslips on a stock 6bolt using the hx-40 with the bullseye turbine housing. This could be a reasonable and very cheap way to go.

IPT · Aug 29, 2006

93AWDTalon1 said:
What are the mods and boost on this evo?

This is what I can remember.

Stock motor, HKS cams, stock intake manifold.

3" exhaust, Buschur racing exhaust manifold, GRE EVO FMIC, upgraded intercooler pipes.

AEM EMS.

I am not sure how much boost. I want to say it was around 25psi, but I am not sure. I know it was not more than 30psi.

Steve93Talon · Aug 29, 2006

vintagemuscle said:
I have although seen low 11 second timeslips on a stock 6bolt using the hx-40 with the bullseye turbine housing. This could be a reasonable and very cheap way to go.

Make that a stock 6 bolt with compression readings of 90-90-100-110. With a fresh built bottom end, the car pulls as hard at 24psi as it used to at 28.

vintagemuscle · Aug 29, 2006

Steve93Talon said:
Make that a stock 6 bolt with compression readings of 90-90-100-110. With a fresh built bottom end, the car pulls as hard at 24psi as it used to at 28.

Steve, i'm glad to see someone is having success with the bolt on housing. Any new track times on this setup? By reading stuff like this maybe i will just go ahead and pick up a holset. Is this using the straight hx-40 or is it the 40/35 hybrid that bullseye sells? Also isn't spoolup in the low 4k range?

brute · Aug 29, 2006

Why over do it? Just get a 50-trim, GT3071, or a HX-35. Those all support 400-450whp. Plus, they'd spool quicker than the larger turbos you're looking at.

vintagemuscle · Aug 29, 2006

brute said:
Why over do it? Just get a 50-trim, GT3071, or a HX-35. Those all support 400-450whp. Plus, they'd spool quicker than the larger turbos you're looking at.

For me as long as spool is under 5k it doesn't really bother me. This car is not my daily driver, so who cares when it spools as long as it's quick.

GVR4592 · Aug 29, 2006

The .63 A/R PTE bolt-on housing is the next in line after the FP housing in terms of flow. There are a few 575+whp dsm's using that housing.

Steve93Talon · Aug 30, 2006

Not my car, it's Carl's from Good Vibes. He went 11.5 @ 125 on the new engine with a break-in tune at 24-25psi so far. Now we're ready to really crank it up and see what it can do. It's an HX40 pro in the bolt-on housing. It sees full boost by well under 5k.

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who makes the largest a/r bolt-on turbine housing?

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