Wastegates.

[samlloyd]

I Need a wastegate for my RB, maybe the next size up from a 38mm?

Has anyone used the M&H Brand wastegates?
I Dont really want to pay 500+ for one, where are the best places to find a good price


This is my drawing of my idea to get a wastegate to work properly with a split pulse manifold, this is identical manifold to what i have ( disregard the turbo in the picture as its internal gated)/

Does anyone see a problem with a wastegate mounted like this?

the small font says wastegate goes here

[RBPOWA]

all the Rb manifolds that ive seen with gates on them have had the split gound off, and the gate is mounted nearer no6...or mount it on the exhaust side of the turbo...i'l find a pic of how mine is done.

[Bazda]

I would keep the split pulse. Makes a huge difference on spool up.
Cant quite see the drawing that well, but having 2 pipes running off each chamber is the way to go, then into 1 pipe to the gate.
BUT where you join the 2 pipes to 1 into the gate you need a splitter tounge to keep the split pulse all the way to the bottom of the wastegate valve, or your just defeating the purpose of having a split pulse system.

M&H do a 44mm v-band, they look ok, might want to ask about warranty as it will def be made in China.

[blackmk3]

Ive seen it done, looks like a bag of shit but it works. Just get a good welder to weld it with the right cast sticks etc otherwise they just crack

[soopachargen]

if you're thinking of getting it welded to the cast manifold why not get it welded to the exhaust housing of the turbo??

[samlloyd]

Thats an option, but i dont really want to hack up a brand new turbo...

any other advice on choosing a wastegate and where to buy it from?

[kompressor]

Im sure the turbo's wastegate will be fine up to 14psi?
Could just buy a manifold with a wastgate flange on already, then you will not have any cracking problems. The aftermarket ones do need a good clean up on the inside with the die grinder

[deaf_rattle]

Thats an option, but i dont really want to hack up a brand new turbo...

any other advice on choosing a wastegate and where to buy it from?

pfft, hack away. thats what we are doin.

[Bazda]

Im sure the turbo's wastegate will be fine up to 14psi?
Could just buy a manifold with a wastgate flange on already, then you will not have any cracking problems. The aftermarket ones do need a good clean up on the inside with the die grinder

The turbo he is going to use doesnt have a internal wastegate as its a massive T60! rated to 600hp.

I used to run the same system on my old 4agte having 2 pipes to 1 using a splitter plate. Adding the a splitter plate is actually very very easy, even easier if the bottom of the valve of the gate you buy is flat.

And for brands, Tial is the best, always has been always will be .
But you have to pay the $$$ for them.

I have used chinese ones on mates cars and they seem to work mint. The only think I do with them is dis assemble, re locktight the grub screws that hold the diaphram flange to the shaft, and sometimes replace the diaphram with a branded one as they can be quite thin so they easily pierce.

[escortman]

Could just buy a manifold with a wastgate flange on already, then you will not have any cracking problems. The aftermarket ones do need a good clean up on the inside with the die grinder

the common aftermarket 1s are just for looks and crack, factory is the best setup

[samlloyd]

I dont think hacking up the turbo to have the wastegate coming straight off the turbine housing will work anyway, since its a split pulse turbo, so i'd end up with the same problem

[Bazda]

My old manifolds

[tsoob]

I Need a wastegate for my RB, maybe the next size up from a 38mm?

Has anyone used the M&H Brand wastegates?
I Dont really want to pay 500+ for one, where are the best places to find a good price


This is my drawing of my idea to get a wastegate to work properly with a split pulse manifold, this is identical manifold to what i have ( disregard the turbo in the picture as its internal gated)/

Does anyone see a problem with a wastegate mounted like this?

the small font says wastegate goes here

i have just had one made for a customer, it is right at the collector, it works beautifully as it collects as even as possible, we have had a piece of cast iron shaped and then brazed into it, this is not cheap $500 bucks to do, however it will not crack, if you weld steel into the cast its only a matter of time before it cracks.

As far as the w/g goes, buy it cheap buy it twice, $500 is fair for a good quality w/g man.

i have pics of the job if you want i can email it to you, its in a r32 with a 20 det in it.

Thanks
Nick

[samlloyd]

Looking at a 44mm wastgate, with v band style inlet and outlet, Im not too familiar with v-band, whats the story? Is it just a hoseclamp?!

[MAGN1T]

You've got to be very brave to claim that a manifold won't crack. It's inevitable that it WILL crack, considering that bronze and cast iron expand at different rates when heated. I had a cast iron manifold brazed years ago because it had cracked. It had to be re done quite a few times .

Steve

[YeMs]

i gas axed a hole in the factory exhaust manifold on my 25det, shapped a pice of steam tube to fit, heated the cast with the gas untill it was glowing red and welded away. the weld seems to have penetrated right into the cast and is holding up fine. the pipe comes up between no5 and no6 port and holds boost at 11psi with a t3/t4 ar .50/.63. its rough, i know. but for the price of trying to bronce cast on an that riff-raff, you can buy a trademe stainless manifold.