Boost Tapering Suggestions (GT3071R - Stock Block)

[2XS]

@ Troy.. u want everyone to borrow/exchange ur block im starting to think its a dud

I don't need it anymore. I don't own an MPS.

[luke 3mps]

I don't need it anymore. I don't own an MPS.

Sharing's care'n

[MPS2NV]

Is your exhaust manifold stock ray? It will be interesting results on how turbo reacts, Jim is you man

[oohsean]

What is the stock boost control though the rpm?

I think HPF in Melbourne do a safe tune of around 17psi throughout?

[rayd]

Is your exhaust manifold stock ray? It will be interesting results on how turbo reacts, Jim is you man

Hey mitch

Yer mani is still stock , I think the stock mani is pretty good , I can only flaw it with that springy thing in the middle... Not too bad hehe

[2XS]

Hey mitch

Yer mani is still stock , I think the stock mani is pretty good , I can only flaw it with that springy thing in the middle... Not too bad hehe

The stock manifold is a POS. It has the flex joint in the middle.
It has a valve style "flap" to separate the gasses from cylinder 1 and 2, which restricts flow at any sort of RPM (higher in the revs) Did you look at the colour difference from cylinders 1and 2 to the colour of 3 and 4. The dry side (1 and 2) means that it has been hotter than the gloss side (3 and 4) which means the flap has been restricting flow causing heat buildup.

Flap is "flapping and you can see the colour difference in the Youtube clip.

I would suggest a better manifold as soon as funds permit.

[SarcasticOne]

very interesting troy...

[Crusher_13]

I'll actually answer your original question.

Use the e-Boost2 from Turbosmart
Adjustable Boost Levels: program boost against TIME or RPM.

[rayd]

The stock manifold is a POS. It has the flex joint in the middle.
It has a valve style "flap" to separate the gasses from cylinder 1 and 2, which restricts flow at any sort of RPM (higher in the revs) Did you look at the colour difference from cylinders 1and 2 to the colour of 3 and 4. The dry side (1 and 2) means that it has been hotter than the gloss side (3 and 4) which means the flap has been restricting flow causing heat buildup.

Flap is "flapping and you can see the colour difference in the Youtube clip.

I would suggest a better manifold as soon as funds permit.

Interesting indeed, ill have to suss out various options ... Thanks for the advise Troy.

[rayd]

I'll actually answer your original question.

Use the e-Boost2 from Turbosmart
Adjustable Boost Levels: program boost against TIME or RPM.

Yer I looked at that actually, but found it too expensive, ended up getting the Perrin ebcs pro, hopefully works well