STR exhaust Manifold

[Joris]

True. Simple fact is that the project has cost nearly twice as much as expected when we started (15000+ euro) and at a given moment you have to stop spending on good materials. This is something that is fairly easy to replace, and when there's some money available we'll eventually do that. But for now this should do.

[Jamo]

You can buy 4 for the price of 1 original or wagner...

You maybe able to buy 4 but it's nowhere near the same quality

a) It's a log manifold!, it has no collector i.e no individual runners from each cylinder to a central output so EGT's will be higher and exhaust gasses will / have the potential to interfere with each other.

b) The runners are small, the Wagner runners are 38mm odd and will support over 500 bhp

[Joris]

I wonder how it's going to hold. Shouldn't be too hard on a 350-375 bhp setup. It costed 200 euro including shipping (75 canedian $) to the netherlands, and it took 5,5 weeks to get here. But since our engine is still not ready, the waiting was no problem. And the fitting (as was a problem on the previous ones, such as brams) should be ok now. You can buy 4 for the price of 1 original or wagner... So I'll post the experiences when the engine runs.

[Rusty]

Interesting that the flow bench data in a previous thread shows the RS2 to have about 5% more total flow capability yet from the results I've seen on here it will allow a lot more power. For £250 I should be able to source a decent (& proven) RS2 manifold...

[twoqu]

I would doubt whether any manifold bar some of the IMSA stuff is optimal!
There are many contraints - design, material, cost and of course packaging.
Question is is it any better than the original. Feedback from some users seems favourable. Obviously you would have to wait longer to see what the durability is like.
If nothing else it looks better than the rather curious arrangement the bean counters at Audi let us have when they already had a Sport casting available. Then again, people say they aren't much good either!
If only these people could get all the little things right like the wastegate issue which seems to catch out all these replica manufactureres.

[Jamo]

Right, I understand. And the OE mani is a bit rubish because of 1 & 5 having a longer distance due to joining the WG pipe.

You got it

Log manifolds are very popular in the american market as they are easy to design and mass produce but ideally you want the collector design with each cylinder going to a central collector.

[Rusty]

There is no collector, the gasses all run along a central tube for each cylinder hence the term log. This design results in higher backpressure and EGT's

In the wagner / rs2 manifold manifold each cylinder has it's own path for the gasses collating at the collector directly into the turbo

Right, I understand. And the OE mani is a bit rubish because of 1 & 5 having a longer distance due to joining the WG pipe.

[Jamo]

Why are the EGTs higher? Is it due to the combined runners actually being narrower than the individual ones on S2 / RS2 / Wagner / tubi etc.

Why did 034 make one if they're that bad, there must be some advantage?

There is no collector, the gasses all run along a central tube for each cylinder hence the term log. This design results in higher backpressure and EGT's

In the wagner / rs2 manifold manifold each cylinder has it's own path for the gasses collating at the collector directly into the turbo

[Rusty]

I hope this one's made better than the 034 one we saw at adi last year.

Yeah, I saw Russ's and it was an absolute disgrace.

[Acidburn]

Why did 034 make one if they're that bad, there must be some advantage?

I hope this one's made better than the 034 one we saw at adi last year.

[Rusty]

Wow I can't believe people are going to buy this log manifold, it's design is worse than the OEM S2 one which made for high EGT's

Why are the EGTs higher? Is it due to the combined runners actually being narrower than the individual ones on S2 / RS2 / Wagner / tubi etc.

Why did 034 make one if they're that bad, there must be some advantage?

[twoqu]

I guess it would be comparable with these figures off the 034 fabricated manifold.
However there are some other issues that are worth mentioning. Since the one Bram bought they have indeed modified the wastegate flange to what we could call a cloveleaf pattern. They have also increased the wastegate bore to 40mm+!
So what I hear you ask? Well it means that the wastegate is no longer concentric with the bore and there is more material at the front than the rear which is the other way round on the wastegate. I would guess the wastegate has more material at the rear to beef up the wastegate where the flexy pipe is attached.
If you look very closely you can see the difference on the flange towards the rear.
Another gripe is that there is a lot of internal casting flash that will need removing. Can't see anyone wanting that going through their turbo!

[Rusty]

Noone has bought anything yet... looking into the options.

[Jamo]

Wow I can't believe people are going to buy this log manifold, it's design is worse than the OEM S2 one which made for high EGT's

[Rusty]

I emailed the seller off Ebay about postage prices for multiple purchases. Rough price for each manifold is about £250 delivered to your door (at the current exchange rate, including all import duties and fast delivery). This would be on 3 off.