turbo manifold question

[NOLAW]

Hey guys, well im going to be getting a new manifold made up soon for the project and I want to get a few ideas on how to set it up

I have a new masterpower t56 twin scroll turbo and at this stage im going to run a top mount setup, as for the wastegates im looking a ethier x2 38mm ones or a single 44-50mm one.

The upside on x2 wastegates is the cost but is better flowing and easyer on the manifold in the long run, and the single gate is alot cheaper but i have been told it has to have a peice welded in to keep it split upto the wastegate flange and over time this will wear out due to the temprature of exhaust flow at the flange.

what would you guys suggest?

[BlakeNZ]

2 38mm tials will cost $380 each, which is cheaper than the turbosmart 45mm hypergate or 50mm pro gate($895 and $995)
Beware wastegate sizes. for instance, a 48mm turbosmart has a 45mm hole, a 44mm tial has a 40mm hole.
Enlighten me- what is a t56 turbo?

[Bazda]

I supplied him a Masterpower T56 Twin scroll turbo as what I was running.

I would go with 2x 38s. The splitter tongue gets annoying, one way you could make it last is use 5mm plate! If it ever does leak between the 2 banks spool will be inhibited as I had found out.

[NOLAW]

sorry thought i mentioned masterpower in there lol, did realise the larger gates were that much more in cost, looks like the x2 38mm are looking more appealing at this stage then

[Heylin]

Im using 2 X 38mm Wastegates on my GT3076R, they are from Lightning Motorsport in Hamilton.

$160 each, they have sold alot of them with no issues and they tick all the boxes in terms of construction materials for the diaphragm, valve seat etc.

7 psi spring standard, larger springs $30 each

[Bazda]

The cheaper wastegates are ok. just make sure you pull them apart and lock tight any screws on the inside as they usually fall out after long periods of circuit use.
Also the diaphragms in them dont last that long for circuit racing from the periods of extended heat.

[Heylin]

The cheaper wastegates are ok. just make sure you pull them apart and lock tight any screws on the inside as they usually fall out after long periods of circuit use.
Also the diaphragms in them dont last that long for circuit racing from the periods of extended heat.

Also clean out the cheapies, some have metal filings in them which can cause issues.

The Lightning ones have Nolex diaphragms (same as Tial) not sure if Tial use a different composition that make them last longer, but I plan to inspect and possibly swap my diaphragms out every 2 years to be safe, they dont cost much (just another maintainence item).

[strx7]

having killed a motor as a result of an elcheapo wastegate i'd never go there again.

The piston was binding when trying to move as the piston head wasn't truely square in relation to the piston shaft. Cause it to bind, 20psi boost and bent rod........

It was a "tial style" and a good copy, as i brought a genuine tial and bolted it straight in and away we went (with forged rods)

[Heylin]

having killed a motor as a result of an elcheapo wastegate i'd never go there again.

The piston was binding when trying to move as the piston head wasn't truely square in relation to the piston shaft. Cause it to bind, 20psi boost and bent rod........

It was a "tial style" and a good copy, as i brought a genuine tial and bolted it straight in and away we went (with forged rods)

Nothing a good EMS wouldnt have prevented, I think regardless of what Wastegate is run there should always safety protocols in place for overboost situation, even Tials can fail (although very very rare).

Mabey Tial dont sell as high numbers as the cheaper knock offs so less problems reported ?, no manufacturer can boast a 100% no defect rate.

Wastegates are a reletively simple device and provided they tick all the boxes in terms of materials that handle high heat, and as you pointed out dont have any engineering defects theres no reason a cheap knock off cant perform just as well and just as long as a Tial at double the price.

I look forward to providing a great review of these Lightning Motorsport ones once my car is up and running.

[Malcolm]

Wastegates are a reletively simple device and provided they tick all the boxes in terms of materials that handle high heat, and as you pointed out dont have any engineering defects theres no reason a cheap knock off cant perform just as well and just as long as a Tial at double the price.

Sure there is - quality control. While I'm not saying the cheap knockoffs wont have as good quality control as Tial, it's certainly a good possibility. When you're manufacturing parts, machining tools wear (which can cause all manner of issues from changes in tolerances and surface finish to changes in the stresses and deformations created in the part due to the machining process), materials get supplied with slightly varying compositions, manual operations are performed with some variation, parts get dropped and damaged in assembly etc, and all this is where the company's processes, rather than simply the specs of the part, can make a difference to the quality (and the percentage of parts leaving the factory that fail to perform correctly).

This is probably why you get such a mixed bag with some of these cheap copies of parts, some parts will come out perfectly acceptable, but they're more likely to also send out ones that would have been rejected in QC at manufacturers with a reputation to protect

[strx7]

Nothing a good EMS wouldnt have prevented, I think regardless of what Wastegate is run there should always safety protocols in place for overboost situation, even Tials can fail (although very very rare).
g.

we were tuning the car on the road. backed off as soon the boost spiked, and stopped driving as we heard the noise thu the knock headphones, hardly audible without them. the rod had bent a fraction causing the bottom of the piston skirt to be rubbing on the crank counter weight. Turns out the rods weren't really up to the task of 20psi. however had we not had a suspect wastegate the engine would still be together and running happily at 15psi.

[Scottie]

20psi boost and bent rod

Was this in the corolla? Curious, which gen rods they where?

[strx7]

20psi boost and bent rod

Was this in the corolla? Curious, which gen rods they where?

yip, caldina GT-T rods. turns out they are the same rods as found in the 3sge beams motors, bit puny compared to early 3sge/3sgte rods which would have been fine.

[Bazda]

If they are made anything like a Tial, you cant change the diaphragms in the Tials, you have to change the diaphragm and cup as you will never take it apart. Tial only sell it together anyway because of this and thats like $100.