Baha Motorsport

hello everyone, I recently purchased a t3 top mount turbo manifold from blackworks with a 38mm wastegate flange and yesterday I sent it to profunction to tune it and I ran into some major problems with the manifold. Car was run on a 13 psi spring and 5% duty on the PWM. Boost was uncontrollable. Spring was dropped to a 8psi spring, duty still at 5%...still uncontrollable. We undid the boost controller from the top port of the wastegate, boost did drop a little but still uncontrollable at high RPM's. We then threw the smallest spring(4 psi) and ran it with nothing on the top port of the gate. The boost was much lower but again uncontrollable at the high rpm's. The wastegate does it's job just fine on low cam but on high cam once we exceed 7,000 RPM's there's not enough flow going to the gate.for reference - boost on the 13psi spring was 18@6,000 RPM, on the 8psi pring it was 14@6,000 RPM, and on the 4psi spring it was 11@6,000 RPM. Boost cut is set at 25psi and was reached on every spring at anywhere from 7,100 to 7,600 RPM. The wastegate is operating. The issue does not occur when the car is ran just on low cam.
if anyone had this problem please let me know, I contacted many at bwr and didn't get any solution from them

Baha Motorsport

when I contacted manny at bwr he just told me that the wastegate is to small, but that has nothing to with it, at first he told me that the tuner might not know about the s300 but that's just bs.

kyden

how much boost do you get if you remove the wastegate completely?

without even looking up what the manifold looks like, i can bet it's at a 90 degree angle to the collector.

1lowek2007

What turbo? What motor? What cams?

MikeySpec

Didn't want to try that in this engine bay so the smallest spring available was used. You hit the nail on the head with the angle of the collector....who's designing this ****? Ken Peak?


1.8L B-vtec, 9:1 compression on a mild cam. t3 6266 with a .82 AR

Turbo-LS

iTrader: (4)

Well for starters a 38mm wastegate on a top mount is ludacris. you need a large gate to control boost on a top mount manifold unless its dual gates, then two 38's would work. Im having the same issue with a 45mm wastegate but its not uncontrolable just creeps like 6-7 pounds. Its partially due to the wastegate outlet not being teardrop shape on my manifold but mostly because of the 66 exhaust wheel, this is a known issue. You need dual gates to control boost and if your having that bad of boost creep i highly recommend dual 44-45mm gates and that they are setup priority if you have the room or at least teardrop

turbociv910

should have done your research, never opt for a single 38, specially when its at a 90* angle.

1lowek2007

Even on a strait 38mm flange it wouldnt be enough, the 6266 is a very efficient turbo. A properly placed 44 is what its going to take. But probay gonna take a 60mm to really control boost at lower levels

Turbo-LS

iTrader: (4)

a single 44 gate will not work unless its setup priority straight as possible in line with the collector. especially with the .82 housing. a single 60 gate will work perfectly or two 44-45's

Runnerdown

Lol, crappy manifold layout with a single 38? On that turbo and setup?

Next time purchase a manifold and appropriate tech support from a real company.

UtzingerFab

these are ebay manifolds correct

Turbo-LS

iTrader: (4)

My buddy had one of their ramhorns. It was a solid piece BUT it hit the hood when he would accell hard even with stiff mounts. It just want put together properly in the sense of how it was layed out

sheepey

BWR Units are good units and the company stands behind them. a 62 pte turbo flows every well. Its all about matching the combo correctly when doing a turbo setup. I am sure if you would have told Manny the turbo you wer running he would have advised to run a bigger gate. It doesn't matter who designed it. 38mm 2 bolt with the turbos these days is crazy. I have rejected customers that insist on 2 bolt gates with bigger turbos.

Baha Motorsport

ita a vband turbo, not a 2bolt

SilverEK96

iTrader: (11)

Yeah I can vouch for the BWR turbo manifolds as well. I bought the BWR Ramhorn w/44mm wastegate flange and downpipe combo. The quality was very good and solid. Comparable to my old AFI ramhorn setup. I paired it up with my 6262 and to date no problems with boost creep issues.

Baha Motorsport

the thing that really pushed my buttons is the first problem they had with the manifolds, the wastegate flanges were made to thin and when I installed the wastegate I could actually spin the gate with my hand, I contacted manny at BWR, and he told me that he know's of the issue. if he knew of the issue why didn't they inform there authorized distributor's?? I had a couple of them instock and I was never informed about it.

UtzingerFab

i have heard these are really nice they look to be a real quality peace I have seen them on ebay before

sanman000719

hmmmm some odd comments in here about a single 38mm gate

this is what i run on my topmount and had a 6265 on it with the 1.15 devided housing i made 757@32psi with no issues at all

now im on a 6766 the little gate is doing just fine

wantboost

iTrader: (2)

that's because you're running high pressures, which means very little exhaust gas bypasses the turbine.

Totally different story with a big turbo trying to run 10psi.... it takes a very large or even multiple wastegates to bypass enough exhaust gasses around the turbine to maintain lo pressure levels.

sanman000719

correct i am now educated thank you lol

a1320honda

I have a top mount on a 6266 with a Tial 44 and the thing crept uncontrollably after 7500rpm. I pulled the gate off completely and still crept to 11lbs. Your gonna need at least dual 38's or bigger. Im going with a single Precision 66. I want to be able to run 8-9lbs in the first 2 gears.

SiRCiviC94

I have a 500hp turbo it holds 5psi on an inline pro cast manifold. The top mount must cause issues? Boost is going up and more rpm and its a 2 bolt 38mm..hopefully no spikes

Turbo-LS

iTrader: (4)

Thats because with a cast log there is considerably more back pressure than a tubular manifold which is forced out of the wastegate much better than a free flowing manifold where you really need to good WG placement or two gates

jdherron1990

Hopefully a single 44 will work for me, im using brms forward manifold with a 35r .82 hot side

Turbo-LS

iTrader: (4)

Post a pic of the manifold JD.