swapping bolton housing for t3 housing?

blcknspo0ln · Nov 28, 2005

After a lot of research and such, I've always noticed that the "bolt on" style housings for 50 trim turbos always produce less power ceteris parabis than a t3 50 trim..

any comments?

*I guess the reason I'm asking is if SBR makes a cast t3 manifold, I may consider switching to external/t3

project_tsi · Nov 28, 2005

How much "more" power are we talking here? Are you basically saying, same turbo, w/ just a T3 manifold and turbine housing swap?

blcknspo0ln · Nov 28, 2005

yea basically.

i'm seeing ~40whp differences.. :confused:

i certainly hope I'm going crazy. otherwise i'll be pissed that I ever went bolton :cry:

project_tsi · Nov 28, 2005

40 whp?? That just doesn't add up to me. I'm not saying its wrong, I would just like some hardcore evidence on this? Maybe a vendor could possibly do some kind of dyno testing on the exact same turbo, yet one w/ a mitsu style flange and the other w/ a T3 flange to help us out.

Shit though, maybe it is. For the price of a decent T3 manifold, I better be getting a few more ponies for the price.

91gvr4 · Nov 28, 2005

Thats currently what I am doing on my AGP rs60t. I have got a South florida performance manifold and just a normal t3 63 ar housing. I have seen upwards of 35hp on high boost by just switching housings, manifold, and o2 housing.

project_tsi · Nov 28, 2005

91gvr4 said:
Thats currently what I am doing on my AGP rs60t. I have got a South florida performance manifold and just a normal t3 63 ar housing. I have seen upwards of 35hp on high boost by just switching housings, manifold, and o2 housing.

That is awesome gains. Thats like adding on a SMIM gains.

blcknspo0ln · Nov 28, 2005

project - I wasn't claiming that it was true, i was just inquiring about it

gvr.. that's freaking good news !! I'm assuming the 35 whp number came from comparison dyno's???

anyway, the reason I was asking was I was alluding to the other SBR thread.. the guy had full bolt-on mods + G50 at 20psi and it only made 307whp :

: I was doing a lot of reading and someone mentioned something about "the bolt-on turbine housings" are very restrictive compared to a t3 or t4.

If its worth 30-50whp difference to switch, shit i''ll do it

Coup D E'Tat · Nov 28, 2005

Yes, big gains seem to come easy with the swap. Anywhere from 30-60whp can be had, depending on setup and what-not.

91gvr4 · Nov 28, 2005

blcknspo0ln said:
project - I wasn't claiming that it was true, i was just inquiring about it

gvr.. that's freaking good news !! I'm assuming the 35 whp number came from comparison dyno's???

anyway, the reason I was asking was I was alluding to the other SBR thread.. the guy had full bolt-on mods + G50 at 20psi and it only made 307whp :: I was doing a lot of reading and someone mentioned something about "the bolt-on turbine housings" are very restrictive compared to a t3 or t4.

If its worth 30-50whp difference to switch, shit i''ll do it

Same car, same boost, same tune. Just with a SSautochrome manifold, and a t3 housing.

Shearer · Nov 29, 2005

40whp should be quite easy to obtain by switching exhaust housings and a manifold. This all depends on how the car is tuned and what exhaust side you go with also.

We've seen 40+hp gains on higher horsepower setups by replacing the Turbonetics manifold with a Shearer manifold.

blcknspo0ln · Nov 29, 2005

Shearer said:
Turbonetics manifold with a Shearer manifold.

i'm confused; is this a t-netics bolton manifold to shearer t3? or t-netics t3 to shearer t-3?

was this cast to tubular? or tubular to tubular?

Victory · Nov 29, 2005

What he is saying is sell the Turbonectics manifold and purchase a quality tubular manifold. They simply flow better.

In regards to the turbine housing you will normally see better flow characteristics with a .63 A/R T3 housing because most aftermarket bolt on turbine housings are smaller than .63 A/R. The traditional T3 housing will move more air but tend to be more laggy.

Scott

blcknspo0ln · Nov 30, 2005

any idea what the AR on the bolt on's are ? .48?

Steve93Talon · Nov 30, 2005

Correct me if I'm wrong, but the quickest 50 trim is Curt Brown - on a Green, which is a hybrid bolt-on. I'm not saying there wouldn't be gains, I just dont see the point unless you're already maxing out what you've got.

Coup D E'Tat · Nov 30, 2005

Steve93Talon said:
Correct me if I'm wrong, but the quickest 50 trim is Curt Brown - on a Green, which is a hybrid bolt-on. I'm not saying there wouldn't be gains, I just dont see the point unless you're already maxing out what you've got.

If we lived by this motto, no one would upgrade past a 14b, since it's went 10's.

blacknspooling, the guesstimate tends to be .48 or smaller. My .82 T3 makes the bolt-on stuff look horribly small.

tsiawd1995 · Nov 30, 2005

Maybe you should work on your set up you have now and see whats wrong. Its not the housing. Bolt ons have gone over 140mph traps. Hell my set up was close to yours and I ran a 11.6 at 121mph stock 2g head,intake,block just cams, pte50trim, 550s,afc and a small greddy fmic.

IPT · Nov 30, 2005

blcknspo0ln said:
any idea what the AR on the bolt on's are ? .48?

PTE .48 and .63

Bullseye Power .55

oldman · Nov 30, 2005

IPT said:
PTE .48 and .63

Bullseye Power .55

SBR?

blcknspo0ln · Dec 4, 2005

oldman said:
SBR?

I'll e-mail them and see what they have to say.

curious, bruce, but is your G12 have the same cast housing as my G50?

1fastlaser · Dec 4, 2005

Im going to a turbonetics manifold,and a .63 turbine housing.I have the manifold already,just trying to find a place that has a t3 .63 that will fit a p trim turbine wheel.Im trying to free up the turbine wheel alittle so it can do what its supose to,not that it isnt working now.Im running the bullseye housing now,2.4.I get 20psi around 36 3700 on the 60-1 p trim im running now.I was thinking the .82/.84 but i think driveablilty us gonna suffer

blcknspo0ln · Feb 4, 2006

I hate bringing up dead threads but I called Matt a while back and he said that the cast housing is .63 AR. Anybody else hear different?

nanokpsi · Feb 4, 2006

David Buschur gained 95 whp on his gt35r evo kits from switching to a bolt on PTE housing to a true .63 housing (his normal kits use a cast mani to run the scm-series turbos). I know the fp stuff is good also, but I think it is still somewhat undersized for the big stuff (3575). I switched from a scm61 to a full t4 and gained a ton of power. I'll have to look back at my logs ubt I think it was around 4 lb/min. Thats close to the gains from cams or a smim.

GVR4592 · Feb 5, 2006

I don't remember where I saw it, but there was a dyno comparison of a PTE/Mitsu style bolt on housing and a .82 a/r T3. The turbo was a GT35R, and the difference was huge. The T3 housing was making almost 50 whp more from 4000-7000. I'll try to find it so I can show you guys.

steel_3d · Feb 6, 2006

Can anyone compare the spool of a bullseye housing to a .63 garrett? Which one's the best garrett design? Are how do they compare in design to the bullseye? Does design even matter, or is it straight up - what you gain in power with one housing you lose in spool?

93AWDTalon1 · Feb 6, 2006

Well not that you can really compare the a/r of all these housing to one another but the FP30's turbine housing is .70 a/r, and a little quote from fp on it

sleestack said:
most aftermarket housings like the FP30 and Garrett T31 housings have a better shaped volute patterned after Garrett Motorsports housings for maximum efficiency.

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