Injected Performance Cosworth Inlet Manifold REVIEW
Originally Posted by Robert_K
Quick lesson here though...Ricer: (Rice-er) Noun; One who purchases cheap products for one's car and product doesn't improve any cosmetics or performance of said car. (I just bought a new AutoZone airfilter with intake tube wrapped in a CF sticker for $50. I know... I'm a ricer.
)Baller: (Ball-er) Noun; One who purchases overprice products for one's car and product doesn't improve cosmetics or performance of said car anymore than same quaility less expensive products. (I just bought the Cosworth Intake Plenum with real CF end caps for $1000! Don't hate me cause I'm a baller!
) 
2005 350z with Turbonetics Kit, ~8psi
Run 051 --- Stock Manifold
Run 053 --- Stock Manifold w/ Plenum Spacer
Run 048 --- Cosworth Plenum
10+whp gain from 5300 up
~30whp gain at 6300rpm over stock!
This looks promising for the high revs, 7000+rpm tests coming soon
Run 051 --- Stock Manifold
Run 053 --- Stock Manifold w/ Plenum Spacer
Run 048 --- Cosworth Plenum
10+whp gain from 5300 up
~30whp gain at 6300rpm over stock!
This looks promising for the high revs, 7000+rpm tests coming soon
Still waiting to be impressed. Disappointed to see the midrange loss. Looks like the spacer was more consistent throughout the entire powerband. Hopefully this performs better in the upper RPMs. I'm anxious to see results with a motor/setup going to 7500 RPM.
Last edited by RudeG_v2.0; Dec 13, 2007 at 05:32 PM.
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Originally Posted by Hal@IP
2005 350z with Turbonetics Kit, ~8psi
Run 051 --- Stock Manifold
Run 053 --- Stock Manifold w/ Plenum Spacer
Run 048 --- Cosworth Plenum
10+whp gain from 5300 up
~30whp gain at 6300rpm over stock!
This looks promising for the high revs, 7000+rpm tests coming soon
Run 051 --- Stock Manifold
Run 053 --- Stock Manifold w/ Plenum Spacer
Run 048 --- Cosworth Plenum
10+whp gain from 5300 up
~30whp gain at 6300rpm over stock!
This looks promising for the high revs, 7000+rpm tests coming soon
. I dont mind losing that much mid if the high end gains is off the chart 
This plenum is going to show that it works better with high HP high RPM setups !!
Last edited by XKR; Dec 13, 2007 at 05:01 PM.
those are big top end gains damn! lDoesnt look like on this particular car the spacer did anything for midrange vs even stock plenum, but the gains up top, esp at redline, are quite nice. Looking forward to trying it out on my NA motor
Last edited by Z1 Performance; Dec 13, 2007 at 05:12 PM.
Rather disappointing actually. Where would you use all that 6K+ power? Not around town. The area under the curve goes to the spacer. That makes the dragstrip a toss-up too. I suppose there is no way to tune this thing, no adjustments to shift the power curve?
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Originally Posted by Z1 Performance
those are big top end gains damn! lDoesnt look like on this particular car the spacer did anything for midrange vs even stock plenum
I'm not going to argue your driving style, I'm sure you're an expert. However, I'd like to point out that when you shift, the spacer will be all over that manifold. That's why I called it a toss-up. I'm sure someone will try it out soon enough, and then we'll know for sure.
Originally Posted by RudeG_v2.0
Still waiting to be impressed. Disappointed to see the midrange loss. Looks like the spacer had was more consistent throughout the entire powerband. Hopefully this performs better in the upper RPMs. I'm anxious to see results with a motor/setup going to 7500 RPM.Not very impressed, considering Im losing mid range power and gaining it back at 6000+rpm. Meh, they shouldve kept in secret for another year
Originally Posted by undrgnd
I'm not going to argue your driving style, I'm sure you're an expert. However, I'd like to point out that when you shift, the spacer will be all over that manifold. That's why I called it a toss-up. I'm sure someone will try it out soon enough, and then we'll know for sure.
1st 3.794
2nd 2.324
3rd 1.624
4th 1.271
5th 1.00
6th .794
so if you shift at 6600 rpms, then
2nd starts around 4000 rpms
3rd starts around 4600 rpms
4th starts around 5100 rpms
5th starts around 5150 rpms
6th starts around 5200 rpms
if you shift at 7000 rpms, then
2nd starts around 4300 rpms
3rd starts around 4900 rpms
4th starts around 5450 rpms
5th starts around 5500 rpms
6th starts around 5550 rpms
if you shift at 7500 rpms, then
2nd starts around 4600 rpms
3rd starts around 5200 rpms
4th starts around 5800 rpms
5th starts around 5900 rpms
6th starts around 5950 rpms
the time you spend in 1st and 2nd gear are nothing compared to the time you spend in 3rd-5th gears which the majority of that rpm range falls above what the spacer's midrange power will give you the advantage. The big hp cars are going to be traction starved in 1st and 2nd gears anyway and not likely to be able to go full WOT in those gears where they'll briefly be in the mid rpms
Last edited by sentry65; Dec 13, 2007 at 05:50 PM.
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Originally Posted by sentry65
the time you spend in 1st and 2nd gear are nothing compared to the time you spend in 3rd-5th gears which the majority of that rpm range falls above what the spacer's midrange power will give you the advantage. The big hp cars are going to be traction starved in 1st and 2nd gears anyway and not likely to be able to go full WOT in those gears anyway where they'll briefly be in the mid rpms
Originally Posted by undrgnd
I'm not going to argue your driving style, I'm sure you're an expert. However, I'd like to point out that when you shift, the spacer will be all over that manifold. That's why I called it a toss-up. I'm sure someone will try it out soon enough, and then we'll know for sure.
your butt-dyno cannot be that sensitive to properly notice that midrange loss...n/a
i think the gains look promising.... Looking forward to higher psi, rev rpm runs...
And the spacer midrange wasnt that impresive compared to what the stock run was.
Fi....that mid range loss is nothing VCT cannot fix
Last edited by IIQuickSilverII; Dec 13, 2007 at 05:59 PM.
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Originally Posted by IIQuickSilverII
And the spacer midrange wasnt that impresive compared to what the stock run was.
Fi....that mid range loss is nothing VCT cannot fix
Originally Posted by undrgnd
I'm not going to argue your driving style, I'm sure you're an expert. However, I'd like to point out that when you shift, the spacer will be all over that manifold. That's why I called it a toss-up. I'm sure someone will try it out soon enough, and then we'll know for sure.
all over? not if you shifted at redline it wouldn't. You would fall right back into the zone where the manifold seems to come on from the looks of it. And this is still a stock redline car from the looks of it, something to keep in mind