Early stages of HR/VHR intake manifold dyno testing.
09-13-2007, 12:31 AM
#42
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Originally Posted by Hydrazine
That would be possible if the assembly came up out of the hood...
Would that be acceptable to the masses?
.
Would that be acceptable to the masses?
.
09-19-2007, 06:34 AM
#47
I was counting on being able to swap manifolds to do quick and easy exploratory testing, but Nissan threw a bucket of water on the party.
This will take time. Next step is to get both manifolds 3D scanned and digitized. Next step is to modify the design so they are interchangable. Next step is to build rapid prototypes. Next step is to test fixed geometry manifolds. Next step it to do analysis on the data. Next step is to design a variable geometry prototype based on the data. Next step... ughhh I can keep typing for two more pages.
As you can see, I have a lot of work to do and it won't come together any time soon.
But it will happen because it must!
This will take time. Next step is to get both manifolds 3D scanned and digitized. Next step is to modify the design so they are interchangable. Next step is to build rapid prototypes. Next step is to test fixed geometry manifolds. Next step it to do analysis on the data. Next step is to design a variable geometry prototype based on the data. Next step... ughhh I can keep typing for two more pages.
As you can see, I have a lot of work to do and it won't come together any time soon.
But it will happen because it must!
09-19-2007, 08:21 AM
#48
OK... I can wait another week or two. 
Honestly... Tony, thank you for your dedication and determination. It takes as long as it takes. We need products that are well thought out, thoroughly tested and perform as advertised in the real world. It's guys like you that make owning these cars more pleasurable!!!
Honestly... Tony, thank you for your dedication and determination. It takes as long as it takes. We need products that are well thought out, thoroughly tested and perform as advertised in the real world. It's guys like you that make owning these cars more pleasurable!!!
Last edited by quidproquo; 09-19-2007 at 11:03 AM.
09-19-2007, 10:34 AM
#49
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Originally Posted by Hydrazine
I was counting on being able to swap manifolds to do quick and easy exploratory testing, but Nissan threw a bucket of water on the party.
This will take time. Next step is to get both manifolds 3D scanned and digitized. Next step is to modify the design so they are interchangable. Next step is to build rapid prototypes. Next step is to test fixed geometry manifolds. Next step it to do analysis on the data. Next step is to design a variable geometry prototype based on the data. Next step... ughhh I can keep typing for two more pages.
As you can see, I have a lot of work to do and it won't come together any time soon.
But it will happen because it must!
This will take time. Next step is to get both manifolds 3D scanned and digitized. Next step is to modify the design so they are interchangable. Next step is to build rapid prototypes. Next step is to test fixed geometry manifolds. Next step it to do analysis on the data. Next step is to design a variable geometry prototype based on the data. Next step... ughhh I can keep typing for two more pages.
As you can see, I have a lot of work to do and it won't come together any time soon.
But it will happen because it must!
My thoughts on this are (and the reason I am asking) that a variable geometry manifold will likely require an ECU retune, if not a piggyback capable of handling multiple systems (cam timing, ignition timing, manifold position, variable fuel maps based on the above 3). Sounds expensive and time consuming to develop, but also like a rewarding technology if done right.
Am I making too many assumptions and this is possible something that can use the factory ECU (maybe with a reflash?) and the manifold "change" point can be controlled by an RPM pickup or possible even the exhaust cam timing?
09-20-2007, 02:46 PM
#50
Originally Posted by Hydrazine
That would be possible if the assembly came up out of the hood...
Would that be acceptable to the masses?
.
Would that be acceptable to the masses?
.
I can see it now....
an 05 350Z, with its sleek hood,
next to another 05 350Z, with the Stillen hood,
right next to an 07 350Z with the "HR bump" hood,
finally,
THE MOTORDYNE HOOD
09-27-2007, 11:22 PM
#52
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Yeah, come on Tony. It's been like a whole week 
From the sound of it, I am guessing there'll be no news here for about 60-90 days at a minimum.
But we can dream!
What about that exhaust you were working on (Sorry.. threadjacking)
From the sound of it, I am guessing there'll be no news here for about 60-90 days at a minimum.
But we can dream!
What about that exhaust you were working on (Sorry.. threadjacking)
10-09-2007, 04:09 PM
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Originally Posted by Hydrazine
This will be a while. I have to design prototypes from scratch and it won't be easy.
Obviously joking. I'm curious if you ever got any dynos comparing the two manifolds that you could post though (or if you have them are you wanting to keep it to yourself for R&D reasons).
10-09-2007, 06:32 PM
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Originally Posted by Hydrazine
No comparative testing yet. That's what will make it a lot more difficult.
Nissan didn't want anyone to do this.
Nissan didn't want anyone to do this.
With the 07, I have found that Nissan really doesn't want us modding it much.
We are having some issues.....to say the least. We'll get through it working with JWT and others.
Last edited by Seb-Specialty-Z; 10-09-2007 at 08:31 PM.
10-09-2007, 08:00 PM
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Originally Posted by Seb-Specialty-Z
Big 2nd
With the 07, I have found that Nissan really doesn't want us modding it much.
We are having some issues.....to say the least.
With the 07, I have found that Nissan really doesn't want us modding it much.
We are having some issues.....to say the least.
(u can start a new thread so that we don't end up hi jacking this one)
10-09-2007, 08:01 PM
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I know you said that the manifolds were just slightly off in bolt pattern. I don't know where the bolts that are off are (and since I haven't really seen the manifold off the car I can't make a good judgement) but is it something you could just bore the bolt holes out, use some washers or a backer plate against the head of the bolt, and get the manifold to work well enough for a few pulls?
Or are we talking the whole manifold has to be remanufactured because of this.
I'll make a fairly bold statement that I don't think the variable valve lift will prove to be benefitial. There are 2 or 3 very basic issues I have with it, one being forced induction (see Alpina ASA blown valvetronic engine requiring a throttle body to be added). The second being that it reduced airflow restriction by 2-3%, and gives that almost completely in gained hp, but also adds complexity to the valvetrain which adds chances for a future failure. the 3rd is that I'm not sure its going to be anything short of a tuning nightmare. I'll see if I'm proven wrong, but I would guess that the VQ35HR will prove to be MORE promising than the VQ37HRV (I think thats the code) as far as big power is concerned.
Or are we talking the whole manifold has to be remanufactured because of this.
I'll make a fairly bold statement that I don't think the variable valve lift will prove to be benefitial. There are 2 or 3 very basic issues I have with it, one being forced induction (see Alpina ASA blown valvetronic engine requiring a throttle body to be added). The second being that it reduced airflow restriction by 2-3%, and gives that almost completely in gained hp, but also adds complexity to the valvetrain which adds chances for a future failure. the 3rd is that I'm not sure its going to be anything short of a tuning nightmare. I'll see if I'm proven wrong, but I would guess that the VQ35HR will prove to be MORE promising than the VQ37HRV (I think thats the code) as far as big power is concerned.