Boost Brothers Turbo Install.

[LAllison20]

You will blow that motor up if you have it hooked up like this.
Go to the side port and let the top port vent.

If you leave it hooked up the way you have it, the boost will be pushing on top of the wastegate and preventing it from opening and the turbo will put out all it could.

Check it and make sure it is right.

I almost found this out the hard way a couple of weeks ago. Luckily the hose clamp on the throttle body was not a t bolt and kept blowing off while on the dyno. My wastegate was hooked up the wrong way, had that been a tbolt clamp my motor would have gone bye bye!

 

[Randy_S_14]

I almost found this out the hard way a couple of weeks ago. Luckily the hose clamp on the throttle body was not a t bolt and kept blowing off while on the dyno. My wastegate was hooked up the wrong way, had that been a tbolt clamp my motor would have gone bye bye!

Yeah, glad we both got ours fixed now lmao.

 

[Flapjack]

Um maybe bc true manifold vacuum has nothing to do with wastegate operation, Well you asked so here ya go flapjack. Plus no ones drills a hole in the turbo all the big name turbo manufactures ie turbonetics, precision, garret, comp, they all come with the port/fitting on the compressor cover.

Heres a pic of mine as it came standard from precision.

There is so much bad information in this post.

The top port would only be used on advanced dual or multi port solenoids on electronic setups where you have alot of back presusre or are trying to run alot of boost on a small spring (ie 30psi with a 9psi wg spring)

The side port is used when running off the wastegate spring or using a manual bc or basic single port electronic boost controller.


There is only one pro to using the manifold as your wg source and it really isnt a pro imho and thats if you have a boost leak or shitty intercooler you will still get the boost you want to the engine. It is not the prefered method for more than a few reasons. One, its less repsonsive and introduces vac to the wg, wg operation calls for a pressure only source which would be right from the turbo compressor housing. This helps prevent presusre spikes on the wg and ensures smoother responsive wg operation. Also prevents from over spinning the turbo if you develop a boost leak somewhere between the turbo and the manifold the turbo will continue to spin up until manifold pressure is reached to fully open the wastegate. In otherwards the turbo might be spinning fast enough to make 30+psi of boost by the time manifold gets the desired 8psi to fully open the wastegate thus more wear and tear on the turbo.

The wastegate is always shut there isnt enough exhaust pressure to push the wg valve open when crusing/part throttle or under boost(when under boost the wg will only open if the pressure source is hooked to the side port on the wg) If the valve is leaking or not fully shut under these conditions its due to a faulty wg.


If you think about how the system operates you will realize the many reasons why most people with aftermarket turbo kits choose a pressure only source for the wg.(not to mention the fact that the major turbo and turbo kit manufactures reccomend a pressure only source for the wg.)

That makes a lot of sense. Thanks for explaining it.

My only question is that I have twin Garretts that don't have ports. I'll look again, but I'm pretty sure I would've noticed.

 

[JoshK]

I did drill and tap my masterpower turbo for the wg signal. Wasn't hard at all.

 

[JeremyH]

No problem. I know the smaller garret turbos are normaly internaly wastegated on oem setups. So its likely if its under a 60mm turbo it doesnt have the port.

 

[Flapjack]

No problem. I know the smaller garret turbos are normaly internaly wastegated on oem setups. So its likely if its under a 60mm turbo it doesnt have the port.

Close. Mine are 61s. Does it matter at all that I have two? I would imagine each turbo be plumbed to its own wastegate. They should be operating within a few ms of each other, so long as they have the same spring and such... right?

 

[JeremyH]

Close. Mine are 61s. Does it matter at all that I have two? I would imagine each turbo be plumbed to its own wastegate. They should be operating within a few ms of each other, so long as they have the same spring and such... right?

Yeah on a dual wastegate setup with identical turbo sizes (ie non bi-turbo/compound turbo) There would be no issues with a pressure only source to each wastegate from their respective turbo.

 

[one eyed willy]

IF it were ME, id use a singal source to control both wastegates.....so they open and close together......wether its from a singal turbo or the manifold (turbo preferred)....really no reason to have the second turbo trying to control the wastegate, just more plumbing and more things to go wrong.....but that just what i think....

 

[Flapjack]

IF it were ME, id use a singal source to control both wastegates.....so they open and close together......wether its from a singal turbo or the manifold (turbo preferred)....really no reason to have the second turbo trying to control the wastegate, just more plumbing and more things to go wrong.....but that just what i think....

Well, from the turbo would involve drilling. I'll look again later, but I'm 99% certain there is no port on them.

The wastegates are supposedly springed at 7.5psi. The most I saw was 8psi on both the dyno pressure gauge as well as my digital gauge in the car.

 

[JeremyH]

Shortest distance pressure only wastegate control from each turbo is best.

If you tried to run a t off the turbo to wastegate hose from one side and route it to the other side of the engine to the other wastegate you would be creating the same issue you thought you were trying to avoide since the wastgate that is closer to the source turbo would have a little quicker response. On a twin setup the turbos work together in the end and each uses half of the exhaust and then they feed off each other so the other way whith each turbo controlling its own wasteagte is more than adequate.

Flapjack if it aint broke no need to fix it, at your level 7-8psi just running off the wastegate springs manifold source will work fine for you. If you decide to turn it up and get serious or add a controller I would def think about using the compressor cover pressure only source.

 

[Flapjack]

Flapjack if it aint broke no need to fix it, at your level 7-8psi just running off the wastegate springs manifold source will work fine for you. If you decide to turn it up and get serious or add a controller I would def think about using the compressor cover pressure only source.

Well, it ain't broke, but I do plan on turning it up. I'm just waiting on my heads and cams to be finished then I'll be assembling the long block and swapping the built 5.4L in.

Still not 100% sure how much boost I'll run, but it'll probably be limited to dyno tuning first, then track days later. I'm thinking I may have it at 10psi on the street, then as high as 20psi once I have the built rear end now (stock 8.8 w/3.73 gears and TR6060, currently)

 

[JeremyH]

Will be a stout setup indeed! If/when I pop this motor lol I will defiently be putting a 5.4 in it.

 

[one eyed willy]

Shortest distance pressure only wastegate control from each turbo is best.

If you tried to run a t off the turbo to wastegate hose from one side and route it to the other side of the engine to the other wastegate you would be creating the same issue you thought you were trying to avoide since the wastgate that is closer to the source turbo would have a little quicker response. On a twin setup the turbos work together in the end and each uses half of the exhaust and then they feed off each other so the other way whith each turbo controlling its own wasteagte is more than adequate.

Flapjack if it aint broke no need to fix it, at your level 7-8psi just running off the wastegate springs manifold source will work fine for you. If you decide to turn it up and get serious or add a controller I would def think about using the compressor cover pressure only source.

you would not use a longer piece of hose on either wastegate, the tee would be in the middle and use the same length to each wastegate.

2 different sources to 2 different wastegates and a gaurantee they dont open at the same time.....which means one side will always be building heat more than the other side....

as i said, thats my opinion.....just how i would do.....

just found this on turbosmart website......

 

[JeremyH]

you would not use a longer piece of hose on either wastegate, the tee would be in the middle and use the same length to each wastegate.

2 different sources to 2 different turbos and a gaurantee they dont open at the same time.....which means one side will always be working harder than the other side....

as i said, thats my opinion.....just how i would do.....

That would be a little better. But if you have 2 wastegates and 2 turbos that run independently off each header each sides turbo should control each sides wastegate imho. In the end they work together and reach the same goal and thats whats commonly done and makes more sense to me so thats how I would set it up.

My buddy with his 2000 GT that he poped the 4.6 2v motor in picked up a 5.4 3v from a wrecked f150 he is doing a custom twin billet 6262 setup on now and he has the wastegate control coming right from each turbo with only about a foot of vac hose right to each manifolds wastegate. His brother built the custome turbo headers, they are pretty sweet. I will post pics once his build comes together.


Btw just saw you updated with a picture. Thats a different concept when using a boost controller on 2 internaly wastegated turbos and as i said early that would be a better way. But for 2 externaly wategated turbos that run off each header with no boost controller just running off each wastegate's spring I definetly prefer the method i discussed above. The boost controllers solenoid adjust the output pressure/flow and thats why its key to have the same length after the solenoid to each turbo in the diagram you posted.

 

[one eyed willy]

That would be a little better. But if you have 2 wastegates and 2 turbos that run independently off each header each sides turbo should control each sides wastegate imho. In the end they work together and reach the same goal and thats whats commonly done and makes more sense to me so thats how I would set it up.

My buddy with his 2000 GT that he poped the 4.6 2v motor in picked up a 5.4 3v from a wrecked f150 he is doing a custom twin billet 6262 setup on now and he has the wastegate control coming right from each turbo with only about a foot of vac hose right to each manifolds wastegate. His brother built the custome turbo headers, they are pretty sweet. I will post pics once his build comes together.


Btw just saw you updated with a picture. Thats a different concept when using a boost controller on 2 internaly wastegated turbos and as i said early that would be a better way. But for 2 externaly wategated turbos that run off each header with no boost controller just running off each wastegate's spring I definetly prefer the method i discussed above. The boost controllers solenoid adjust the output pressure/flow and thats why its key to have the same length after the solenoid to each turbo in the diagram you posted.

the pic was only an example.....it would be the exact same with just removing the boost controller from the picture......


if you like having the wastegates open at 2 different times, then do it your way......lol......id prefer for them open at the same time. it may not make any difference at all, and we may be both right/wrong.......but to say your way is "best".......well.......

 

[JeremyH]

Touche' with a t and equal length hoses you are achieving the same goal. with alot more tubing, thats just not what I prefer and the way i mentioned makes more sense to me and happens to be how my buddy just routed his setup since the wg on each side is so close to each turbo, just one foot of vac hose on each.
I dont like the idea of routing alot more hose and trying to t it directly in the middle. Not that it wouldnt work and if your going to run off just one turbo's pressure source that would be the best way to do it.


When i say best I mean shortest distance vac hose and pressure only source as close to the turbo as possible is optimal yes.

 

[lito]

Both turbos will see basically the same pressure so no need to drill both.

Forgot to add, using the turbo exit usually results in better control at the WG.

 

[JeremyH]

Both turbos will see basically the same pressure so no need to drill both.

Forgot to add, using the turbo exit usually results in better control at the WG.

I can agree to that, if you want to use the compressor outlet for your pressure only source for the wastegates its definetly easier to drill and tap one turbo if your turbos dont have the fittings already which my friends billet 6262's did.

 

[Fallenauthority]

Just got back from testing and all I can say is... WOW

It is working like it should now and the sound is ORGASMIC!!!

Told you bet it put a shit eating grin on your face didnt it?

 

[Flapjack]

Will be a stout setup indeed! If/when I pop this motor lol I will defiently be putting a 5.4 in it.

You'll love it. It takes a bit of work to get the HP curve to smooth out in the upper ranges, but it's worth it. The engine was designed for torque, but I've seen one setup (Todd Wallace) where he's gotten it to maintain power all the way to red line. Personally, I prefer the torque over HP. If I can have both, then I'll be even happier.

Told you bet it put a shit eating grin on your face didnt it?

Just drove the car a few minutes ago with my boys in the back. They screamed every time I got into boost. Hilarious.