JBR under car piping video.

[Redline]

Silicone hoses are used as high-quality replacements over rubber in terms of both not degrading/crumbling/becoming brittle/cracking, and better chemical resistance too, IIRC (which doesn't really matter for a boost tube, but still).

Regardless, I wonder exactly how much 40 psi testing these saw, and under what conditions, temps, etc. In the end, I know Jamie will stand behind his product and make things right if something fails.

 

[Taf0422]

Pretty sure he had a Cobb piping kit at the time, not positive though

I believe he does too but modification to the cold pipe for the manifold. He also has the FJ built under piping (hard pipes) I believe waiting to go on

 

[Enki]

Here's the thing guys, that hose will expand as pressure increases, which means that unless it's doing that at 5 psi, the turbo has already spooled and there's next to no effect when they change shape like that. Is it measurable? Probably. Is it significant? Unlikely.

That said, materials can only stretch so much before they let go; the reason this isn't an issue with shorter runs is because pressures are measured in pounds per square inch and when you only use them as couplers, there's a significant reduction in surface area compared to using it as piping, and thus, significantly reduced stretch.

 

[Faeker]

^ I think the issue is more about what the bursting point will be vs anything else. I still think there could be issues with the diameter changing on the fly, but the inflation seems more of an issue than that. I dont think many people will see expansion over long periods of time but the guys who do autox and track racing will probably see it more often throughout their day.

 

[PoonFlavoredTang]

We are going to trade pipes for a day and see what happens. I'm likely gonna connect my meth and flash the near 40psi tune and see what happens.

 

[Enki]

Attach GoPro to car near pipes plz kthx

 

[PoonFlavoredTang]

@Enki we plan to. I have one.

 

[Enki]

Hope it has life insurance.

 

[Quigs]

We are going to trade pipes for a day and see what happens. I'm likely gonna connect my meth and flash the near 40psi tune and see what happens.

Very much looking forward to the results of this.

Also, here is Jamie's response to this video on the other forum for those that haven't seen it yet:

The piping was tested at 40 psi for continuous periods of time much longer than a wot pull. Burst rated at 150 psi. We haven't seen any problems for the two years they've been available.

HP is not effected nor is acceleration. Lag is increased a a wee bit.

The graph is not really apples to apples. Two different turbos and likely two different tunes.

We've been tracking our shop Mazdaspeed 3 for two years with no issues.

Lifetime warranty = nothing to be concerned about.

My biggest concern, like it was mentioned above, is for the people who have this kit and are doing extended WOT driving such as hot lapping for a time attack event or something like that. It doesn't seem like a huge deal for the everyday driving short bursts of WOT like most of us do, but the track days during the summer when everything gets much hotter is where I'd personally be a little concerned.

 

[PoonFlavoredWang]

I too would like to see if it can actually hold up to 40 psi like JBR says it will. Results should be spectacular.

 

[Redline]

Me too. Jamie is right, though, that there are too many variables to compare the spool straight up. Dale showed that something as simple as WG pre-load adjustment can make all the difference (on an S3, anyways). Pipes expanding a tad should have very little effect on spool, and virtually none to boost threshold, I'd think.

 

[PoonFlavoredTang]

Hmmmmm you stealing muh quan bro... @PoonFlavoredWang

@Redline we should be able to test spool quite easily. Do a few pulls of my current setup and average the boost curve and then do the same for the JBR cold pipe. It'll be on the same car, same day and same tune. Should be fairly comparible. I would also imagine that a BNRs4 should outspool my HTA tho even in different cars on different tunes. That car in question I tuned and I didn't tune it on a taper. It's making boost when it can make boost. Same goes for mine. That's the scientific portion of what we will be doing.

The other part is just to see how the pipes can handle pressure. I have a setup that can do 40psi. Only thing lacking is that I have to hook my meth back up to flash the tune. By hooking up I mean putting the power wire on the pump and flushing my meth with fresh stuff and attaching my @MATT DAMOND TB/Meth spacer.

 

[Faeker]

So the lag is minimal. That's good. As quigs said, the real issue coukd be hot laps and constant inflation and deflation throughout the day. May be fine for a daily but coukd possibly pose and issue for a track car.

 

[PoonFlavoredTang]

So the lag is minimal. .

I don't think we have any data that supports that yet. We will soon. Tho, wouldn't you expect a BNRs4 to spool faster than a HTA3586?

 

[Enki]

Tho, wouldn't you expect a BNRs4 to spool faster than a HTA3586?

There is more to spool than turbo size. Take the EFRs for example; you wouldn't expect a 500 WHP turbo to spool faster than a K04, but it does.

 

[Faeker]

I was just going by Jamie's statement but like enki said, the size doesn't necessarily determine spool time.

 

[PoonFlavoredTang]

There is more to spool than turbo size. Take the EFRs for example; you wouldn't expect a 500 WHP turbo to spool faster than a K04, but it does.

Yes that is due to the Gamma-Ti (Titanium) exhaust wheel. Both of these turbos use inconel.

 

[Enki]

And both probably have different designs on that wheel. AR of the hotside is a factor in spool, and so is comp wheel design (but to a much lesser extent).

 

[PoonFlavoredTang]

And both probably have different designs on that wheel. AR of the hotside is a factor in spool, and so is comp wheel design (but to a much lesser extent).

They are both based off a Garrett turbine wheel. In fact the HTA3586 is exactly a GT35r exhaust wheel. If I remember correctly the BNRs4 is the GT30r exhaust wheel. @JgamB potentially could elaborate more on that.

The BNR also uses a smaller A/R on the hotside, which should spool faster. Although, the compressor wheels are different. The most notable one being cast vs billet. I would imagine the hotside would be more important to spool though.

 

[Redline]

It's pretty simple for me: GT3076s spool faster than GT35s. A BNR S4 is a GT3076 "lite," with smaller wheels/housings. I realize it's not DBB, but if anything, I think it'd be faster than a regular GT3076, let alone any GT35-framed turbo. But my logic may be failing miserably...