Early stages of HR/VHR intake manifold dyno testing.
10-10-2007, 11:43 AM
#61
I wish it were as simple as just milling new bolt holes in the manifold but this new manifold is made of both steel and plastic in such a way that drilling off set new holes is not so simple... or even possible. Some could be milled and others can't.
On the all aluminim DE manifold it would be a piece of cake, but not on this new one. If you could hold and see a HR manifold in person you would be able to easily see why. Explaining it via text here would be complicated without drawings or pictures.
As far as the HR or VHR having more FI potential I'll wager on the VHR being able to do more. If they put the VHR engine in the GTR it will have to have more potential.
Only time will tell. If Nissan ever actually produces a GTR.
On the all aluminim DE manifold it would be a piece of cake, but not on this new one. If you could hold and see a HR manifold in person you would be able to easily see why. Explaining it via text here would be complicated without drawings or pictures.
As far as the HR or VHR having more FI potential I'll wager on the VHR being able to do more. If they put the VHR engine in the GTR it will have to have more potential.
Only time will tell. If Nissan ever actually produces a GTR.
10-10-2007, 07:18 PM
#63
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Originally Posted by Hydrazine
I wish it were as simple as just milling new bolt holes in the manifold but this new manifold is made of both steel and plastic in such a way that drilling off set new holes is not so simple... or even possible. Some could be milled and others can't.
On the all aluminim DE manifold it would be a piece of cake, but not on this new one. If you could hold and see a HR manifold in person you would be able to easily see why. Explaining it via text here would be complicated without drawings or pictures.
As far as the HR or VHR having more FI potential I'll wager on the VHR being able to do more. If they put the VHR engine in the GTR it will have to have more potential.
Only time will tell. If Nissan ever actually produces a GTR.
On the all aluminim DE manifold it would be a piece of cake, but not on this new one. If you could hold and see a HR manifold in person you would be able to easily see why. Explaining it via text here would be complicated without drawings or pictures.
As far as the HR or VHR having more FI potential I'll wager on the VHR being able to do more. If they put the VHR engine in the GTR it will have to have more potential.
Only time will tell. If Nissan ever actually produces a GTR.
I mean, maybe there is more power had that way, or better emissions can be achieved, but I just don't know - especially for aftermarket, and having watched the BMW tuners turn there heads at the valvetronic motors.
10-10-2007, 07:28 PM
#64
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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. We'll get through it working with JWT and others.
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.
10-11-2007, 10:56 AM
#65
Originally Posted by Wired 24/7
Give it up and finish the exhaust project!! Where's my 10-20hp? 
Better repeatability on the dyno means I will be able to dial in better gains. (due to greater certainty of the changes seen on power curve)
And there are a few more interesting details I want to try on the dyno before putting it into production.
Must be certaint of the gains made. Gotta get the MOTEC!
02-20-2008, 07:28 PM
#69
We have to wait and see if they are putting the same manifold into the next gen Z.
Nissan tweaked the 3.7VHR manifold so it wouldn't be interchangable with the 3.5 HR manifold.
This project can't be started if they come out with a 3.8 liter engine with a different manifold on the next generation Z. We will have to wait and see what the next Z brings for 2009.
Nissan tweaked the 3.7VHR manifold so it wouldn't be interchangable with the 3.5 HR manifold.
This project can't be started if they come out with a 3.8 liter engine with a different manifold on the next generation Z. We will have to wait and see what the next Z brings for 2009.
02-21-2008, 03:53 AM
#72
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just not fair I tell yea just not fair .....
What about the 37hr is different other than the top being dished? I know you tried to mod one to fit did that ever work?
Last edited by WalkerT; 02-21-2008 at 03:55 AM.
02-21-2008, 06:59 AM
#74
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Next question ... You say the top of the 37hr intake is dished so why not put that top on a hr base? If the bolt holes are the only difference then this should not be that difficult
Yes I know it is plastic and glued together.
Yes I know it is plastic and glued together.
02-21-2008, 07:57 AM
#75
I tried that.
If you could see and compare the bolt holes for youself you would see that the Nissan engineers intentionally did it in such a way that:
1) The stock plenums can not be interchanged.
2) They overlapped the bolt holes in such a way that even if a new manifold is designed it can only be one or the other.
If you could see and compare the bolt holes for youself you would see that the Nissan engineers intentionally did it in such a way that:
1) The stock plenums can not be interchanged.
2) They overlapped the bolt holes in such a way that even if a new manifold is designed it can only be one or the other.
02-21-2008, 09:58 AM
#76
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Well the bolt holes would be on the lower half of the 35hr intake... If you look close at the HR composite intake it is two halves glued together. Basicly a two part intake. seperate the lower half from the upper half a do the same to the 37 hr intake. Swap and glue it back together. I am talking very generic of course. I think there are some simple/profitable changes you can do that will benifit the HR engine.
02-21-2008, 10:12 AM
#78
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You have to think out side the box. Hot Blade take a minute or two ... clean cut and then cut a grove for the sealent and reseal. This is plastic and with the right epoxy the seal will last forever.
02-21-2008, 10:23 AM
#79
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One better get a plastic mold for a new top and have it shaped completely different. The plastic part of this opens up new doors that people that are use to handleing metal dont think about. I am not implying anything just this can be done right and cheap. Once the mold is made it would be a matter of putting out enough to cover the cost of the mold. Average mold can produce 10,000 unites priced at 100 dollars for the swap and you have 1,000,000. You sell only 5000 at that price and you 500,000. You would only need to sell 100 to cover the price of the mold. You design a top that benifits the 35 and the 37hr engine.