Upper plenum project 75mm Maxima TB - Page 9 - MY350Z.COM - Nissan 350Z and 370Z Forum Discussion



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Old 04-04-2017, 03:00 PM   #161
MatthewBouchard
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Well, the shop I went to before is now closed-ish and sold their dyno. I went to Rev works to get retuned. I had the same tuner as before, "MTuned" .The numbers are 237hp /215 tq. Its lower than before but it was another dyno.

So sadly there are no magic numbers to show an increase; however I love how it feels now.

Edit: Here is the graph.
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Upper plenum project 75mm Maxima TB-new-dyno.jpg  

Last edited by MatthewBouchard; 04-05-2017 at 07:31 AM.
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Old 04-04-2017, 09:25 PM   #162
BakaN20
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I don't have before or after dynos, but after I added a 3 inch intake and 3 inch maf to this setup, I picked up around 2-3 mph on my trap speed. Can't remember the DAs, but just to give a somewhat objective view of this mod. It definitely seems to work with the added breathing modifications.

Last edited by BakaN20; 04-04-2017 at 09:34 PM.
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Old 04-11-2017, 11:51 AM   #163
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- I bought cockyZ's upper intake from him last year. It was delivered shortly after I paid for it. It has been collecting dust for the past year while I tried sorting out existing issues with the car. He is not accepting Private Messages, so I am posting on his thread.

Fast forward to April 2017. My car with a new rebuilt engine has put 331 WHP down on a Mustang dyno.

On to the pieced together stock-ish VQ35DE...

-Rebuilt engine
-Stock bottom end from a REV UP (Pistons, rods, block, crankshaft)
-Stock Non-Revup Heads
-Upgraded ARP Rod Bolts
-New Bearings
-New rings, etc...
-Revup Oil Pump
-PPE Longtube headers
-Single 3 " Agency Power Exhaust
-JWT C8 Cams and Springs
with stock throttle body, upper intake manifold, *ported revup lower, and Momentum intake and UPREV dyno tuning...

-331 WHP on a Mustang Dyno!! (Without this modified upper intake)

Fuel cut is set to 7000 rpm due to the stock rotating assembly. Needless to say I am very pleased with the numbers based upon the relatively mild cams and low 7000 RPM redline. It is still increasing power at fuel cut. I will try and post the dyno chart in the next couple days.

-I will be testing this modified intake manifold within the next couple weeks. I think it will show definitively whether it is a winner. C8 cams, PPE headers, Large intake, your upper intake, ported rev up lower and ported lower intake manifold, UP rev tuning, and full exhaust with no restriction. Revving to 7000 rpm...lets see how this goes!!

Thank you for coming up with this design...I am excitement to see some results!
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Old 05-22-2017, 05:41 AM   #164
dnash
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Quote:
Originally Posted by dsm_mikey View Post
- I bought cockyZ's upper intake from him last year. It was delivered shortly after I paid for it. It has been collecting dust for the past year while I tried sorting out existing issues with the car. He is not accepting Private Messages, so I am posting on his thread.

Fast forward to April 2017. My car with a new rebuilt engine has put 331 WHP down on a Mustang dyno.

On to the pieced together stock-ish VQ35DE...

-Rebuilt engine
-Stock bottom end from a REV UP (Pistons, rods, block, crankshaft)
-Stock Non-Revup Heads
-Upgraded ARP Rod Bolts
-New Bearings
-New rings, etc...
-Revup Oil Pump
-PPE Longtube headers
-Single 3 " Agency Power Exhaust
-JWT C8 Cams and Springs
with stock throttle body, upper intake manifold, *ported revup lower, and Momentum intake and UPREV dyno tuning...

-331 WHP on a Mustang Dyno!! (Without this modified upper intake)

Fuel cut is set to 7000 rpm due to the stock rotating assembly. Needless to say I am very pleased with the numbers based upon the relatively mild cams and low 7000 RPM redline. It is still increasing power at fuel cut. I will try and post the dyno chart in the next couple days.

-I will be testing this modified intake manifold within the next couple weeks. I think it will show definitively whether it is a winner. C8 cams, PPE headers, Large intake, your upper intake, ported rev up lower and ported lower intake manifold, UP rev tuning, and full exhaust with no restriction. Revving to 7000 rpm...lets see how this goes!!

Thank you for coming up with this design...I am excitement to see some results!
Where you able to get dyno'd yet?
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Old 07-09-2017, 11:21 AM   #165
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My build is similar to dms_mikey's - my z has Z1 Motorsport's stage 2 headwork with C8 cams. My non-revup made 300 whp on their dyno, and drops off fairly sharp. Can this plenum mod accommodate the NWP 75mm throttle body? Or would I definitely need to sell it to install the 75mm Maxima tb?
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Old 07-11-2017, 03:43 AM   #166
dnash
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The NWP throttle body is the 75mm Maxima throttle body. The difference beng the adapter for the smaller 350z flange with the NWP kit.
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Old 07-11-2017, 05:27 AM   #167
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Quote:
Originally Posted by jellofuel View Post
My build is similar to dms_mikey's - my z has Z1 Motorsport's stage 2 headwork with C8 cams. My non-revup made 300 whp on their dyno, and drops off fairly sharp. Can this plenum mod accommodate the NWP 75mm throttle body? Or would I definitely need to sell it to install the 75mm Maxima tb?
This modification to the upper plenum allows the NWP throttle body to bolt right up after cutting off the cooling lines. The advantage to this is that instead of where the NWP plate reduces to 72mm and the small sharp bend of the stock plenum it's actually enlarged to 3.25" and the radius decreased further aiding in increased airflow at what is probably the point of the most restriction in the airflow path.
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Old 10-03-2017, 05:34 PM   #168
dnash
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Does anyone know if these manifolds are still availiable? I pm'd cockyZ to no response.
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Old 10-03-2017, 08:05 PM   #169
MatthewBouchard
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Quote:
Originally Posted by dnash View Post
Does anyone know if these manifolds are still availiable? I pm'd cockyZ to no response.
The last I heard from him, he lost his account info I believe.
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Old 10-04-2017, 04:07 AM   #170
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Quote:
Originally Posted by MatthewBouchard View Post
The last I heard from him, he lost his account info I believe.
Do you have any contact info? PM me if you can.
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