Daytona Racing VQ37VHR Upgraded Throttle Bodies

andy_meng1024 · 11-18-2015, 12:07 AM

Quote:

Originally Posted by FPenvy

interesting. have you dyno'd with the new TB's (obviously answers later are fine based on your time)

I wonder if something like the 75mm kit that I found from NWP could work as well.

2 75mm TBs from them are only $130 a piece.

NWP Engineering, Inc - Big Bore Throttle Body - Phenolic Thermal Intake Manifold Spacers - Eliminate Heat Soak in your Nissan!

My dyno just arrived not too long ago and I'm still installing it. I'll get a dyno sheet soon.

imjello · 11-17-2015, 10:58 AM

Quote:

Originally Posted by andy_meng1024

Yes, the connectors are plug and play. I machined a spacer so air flows smoothly from 80mm throttle body into the upper plenum. I'll check the part number tomorrow since it's midnight here now.

Andy

iPhone

pm price for spacers please!

Morfiy · 11-16-2015, 08:07 PM

I assume he talks about Maxima TB
http://www.ebay.com/itm/THROTTLE-BOD...3D291578202095

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synolimit · 11-17-2015, 09:10 PM

I get it but don't see the point. Why have a huge TB if the manifolds gonna stay small? That bottle neck can't be good. now if this spacer is long enough with a nice taper, that could speed the air up some and help. But a spacer matching the bigger TB then having the back side be larger than the manifold hole is going to be horrible for flow as the air will hit a lip.

What really needs done is machine the manifold completely removing the gasket ring section so the holes 75-80mm. Then siliconing or getting enough gasket to hold tight on the flat surface of the spacer and manifold. Then it'll be a smooth transition being true all the way through. But with that much air will our motor be able to take it? Where will the power curve move to?

synolimit · 11-17-2015, 10:02 PM

Just sent this idea to phunk...should work. Any takers or thoughts??

andy_meng1024 · 11-18-2015, 12:05 AM

Here's the whole thing looks like:
IMG_3351.jpg

Part numbers:
IMG_3352.jpg
IMG_3353.jpg

With the spacer installed:
IMG_3354.jpg

From this angle, you should see that when we talk about the area of the throttle body, the real cross section ares is not pi x r^2. It has to subtract the butterfly valve part, which means the total area is a lot less. Look at the end of the spacer, the area is not blocked by the butterfly valve at all, which makes the area almost the same with the area from the bigger throttle body.
IMG_3355.jpg

I know this is not the ultimate design yet, which is why my new upper plenum is in prototyping already, to pair with this 80mm throttle body.

synolimit · 11-18-2015, 05:12 AM

Quote:

Originally Posted by andy_meng1024

Here's the whole thing looks like:
Attachment 109724

Part numbers:
Attachment 109725
Attachment 109726

With the spacer installed:
Attachment 109727

From this angle, you should see that when we talk about the area of the throttle body, the real cross section ares is not pi x r^2. It has to subtract the butterfly valve part, which means the total area is a lot less. Look at the end of the spacer, the area is not blocked by the butterfly valve at all, which makes the area almost the same with the area from the bigger throttle body.
Attachment 109728

I know this is not the ultimate design yet, which is why my new upper plenum is in prototyping already, to pair with this 80mm throttle body.

Nice so it does taper right? Looks that way. 80 down to the manis opening at 62mm? All thats needed now is go bigger

. Port the TB, bigger butterfly, thin the butterfly shaft and install flat head screws vs these large round ones. PS i know a guy

andy_meng1024 · 11-26-2015, 02:26 AM

Quote:

Originally Posted by synolimit

Nice so it does taper right? Looks that way. 80 down to the manis opening at 62mm? All thats needed now is go bigger

. Port the TB, bigger butterfly, thin the butterfly shaft and install flat head screws vs these large round ones. PS i know a guy

Yes, it's taper.

370Z JT · 11-18-2015, 01:57 AM

Any info on your upper plenum?

Sent from my Nexus 6 using Tapatalk

andy_meng1024 · 11-18-2015, 05:34 AM

Quote:

Originally Posted by 370Z JT

Any info on your upper plenum?

Sent from my Nexus 6 using Tapatalk

It's still in prototyping stage so not final yet, but it's designed to optimize and balance air flow for each cylinder, kind of like what ITB does. It's specifically designed for N/A application, since all the ones I've seen now are for turbo cars.

iPhone

Morfiy · 11-18-2015, 07:18 AM

Well done Synolimit! At least something is going on around NA engines

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Elmo370z · 11-18-2015, 11:02 AM

We just need a manifold, so many Empty promises

Morfiy · 11-18-2015, 07:55 PM

Yup, something to increse our hp's and make the bay looks great

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andy_meng1024 · 11-25-2015, 09:06 PM

My sample manifold is almost ready, but the cost is crazy. Still trying to see if there's other ways to cost down, otherwise it'll probably be a one off plenum.

iPhone

370Z JT · 11-25-2015, 09:35 PM

Crazy like $3k +?

Sent from my Nexus 6 using Tapatalk

11-17-2015, 09:10 PM	#4 (permalink)
synolimit A True Z Fanatic Join Date: May 2013 Location: Columbus, OH Posts: 5,051 Drives: 2013 Silver 370z Rep Power: 3391	I get it but don't see the point. Why have a huge TB if the manifolds gonna stay small? That bottle neck can't be good. now if this spacer is long enough with a nice taper, that could speed the air up some and help. But a spacer matching the bigger TB then having the back side be larger than the manifold hole is going to be horrible for flow as the air will hit a lip. What really needs done is machine the manifold completely removing the gasket ring section so the holes 75-80mm. Then siliconing or getting enough gasket to hold tight on the flat surface of the spacer and manifold. Then it'll be a smooth transition being true all the way through. But with that much air will our motor be able to take it? Where will the power curve move to? hooey_b likes this. __________________ 13 370z-

11-17-2015, 10:02 PM	#5 (permalink)
synolimit A True Z Fanatic Join Date: May 2013 Location: Columbus, OH Posts: 5,051 Drives: 2013 Silver 370z Rep Power: 3391	Just sent this idea to phunk...should work. Any takers or thoughts?? Morfiy and hooey_b like this. __________________ 13 370z-

11-18-2015, 12:05 AM	#6 (permalink)
andy_meng1024 Premium Member Join Date: Nov 2009 Location: Taipei Posts: 233 Drives: 2012 370z Rep Power: 3383	Here's the whole thing looks like: IMG_3351.jpg Part numbers: IMG_3352.jpg IMG_3353.jpg With the spacer installed: IMG_3354.jpg From this angle, you should see that when we talk about the area of the throttle body, the real cross section ares is not pi x r^2. It has to subtract the butterfly valve part, which means the total area is a lot less. Look at the end of the spacer, the area is not blocked by the butterfly valve at all, which makes the area almost the same with the area from the bigger throttle body. IMG_3355.jpg I know this is not the ultimate design yet, which is why my new upper plenum is in prototyping already, to pair with this 80mm throttle body. FPenvy, Morfiy, synolimit and 1 others like this. __________________ Current: 2015 C200 / 2018 Cayenne / 2012 370z / 2012 C250 Coupe Gone: 2013 Cayenne / 2004 Cayenne S / 2003 SL55 AMG / 2008 C300 / 2006 350z / 2006 C280 4Matic

11-18-2015, 01:57 AM	#9 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 380	Any info on your upper plenum? Sent from my Nexus 6 using Tapatalk __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

11-25-2015, 09:06 PM	#14 (permalink)
andy_meng1024 Premium Member Join Date: Nov 2009 Location: Taipei Posts: 233 Drives: 2012 370z Rep Power: 3383	My sample manifold is almost ready, but the cost is crazy. Still trying to see if there's other ways to cost down, otherwise it'll probably be a one off plenum. iPhone __________________ Current: 2015 C200 / 2018 Cayenne / 2012 370z / 2012 C250 Coupe Gone: 2013 Cayenne / 2004 Cayenne S / 2003 SL55 AMG / 2008 C300 / 2006 350z / 2006 C280 4Matic

11-16-2015, 08:07 PM	#3 (permalink)
Morfiy Base Member Join Date: Dec 2012 Location: Russia Posts: 209 Drives: 370Z "Authentic" Rep Power: 14	I assume he talks about Maxima TB http://www.ebay.com/itm/THROTTLE-BOD...3D291578202095 Passport Tapatalk

11-18-2015, 07:18 AM	#11 (permalink)
Morfiy Base Member Join Date: Dec 2012 Location: Russia Posts: 209 Drives: 370Z "Authentic" Rep Power: 14	Well done Synolimit! At least something is going on around NA engines Passport Tapatalk

11-18-2015, 11:02 AM	#12 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,730 Drives: 09 nissan 370z Sp M6 Rep Power: 295380	We just need a manifold, so many Empty promises

11-18-2015, 07:55 PM	#13 (permalink)
Morfiy Base Member Join Date: Dec 2012 Location: Russia Posts: 209 Drives: 370Z "Authentic" Rep Power: 14	Yup, something to increse our hp's and make the bay looks great Passport Tapatalk

11-25-2015, 09:35 PM	#15 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 380	Crazy like $3k +? Sent from my Nexus 6 using Tapatalk __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

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