Please tell me that motor mount is just a temporary mockup piece.

 

Well it wasn't mock up. Someone had actually had that in the car.
Some of the garbage that comes out of workshops around here is pretty bad.
Its been replaced.
Back onto the topic of over boost.
The new manifold is going back in today with 2 inch runners. Ill get some piccies of the new manifold.
Fabricator says he has given more priority to the gates while placing them in the same place so well see how that pans out.
I will retest everything once more and check for any boost leaks as well in the plumbing of the lines once its back together. It was ok before so I cant imaging there being a leak now.

Something else i should point out. When i raise the ramp rate on the dyno to 200
I can hold 25psi.
Its only when i bring it down to anything lower it over boosts. Basically with any real load on it.

 

Engine mount tells me you running a right hand drive 1st gen?

 

rhd rx3

 

I had overboosting problem with tial 60mm, found the problem after swapping springs I pinched the diaphragm with the top cover, it didn't rip it just could not open all the way, got new diaphragm and boost solid10 psi to red line on pte6766 billet turbo

 

 

Do you think that photo could be a little bigger lol

Ok so we have changed the manifold to 2 inch runners and we can now hold a solid 15psi.
Didn't get enough time last night but I am currently at 30 psi but tune is far from finished.
93 octane tunes take a good while to get right.

I have attached a picture of the manifold

 

Interesting, while I wouldn't have thought the gate runners on the old one were bad and I'm surprised they over boosted that much, the new one certainly have more area and smoother radius entries to the gate runners as well as the larger diameter.

Apologies for the image size, grabbed it from google image search and was too lazy to resize.

 

Great, sounds like that licked it.

I'm also surprised that the old manifold was causing that much over-boost, it just doesn't look that bad.

I wonder if this is because of the efficiency of the EFR? If so there may be a bunch of people that run into over-boosting if they swap in an EFR on an existing "marginal" manifold.