Daytona Racing VQ37VHR Upgraded Throttle Bodies
 

Daytona Racing VQ37VHR Upgraded Throttle Bodies

Daytona Racing Upgraded Throttle Bodies have been modified to accept larger butterflies increasing the area in which incoming air can travel. This means your engine can breathe better which results in improved throttle response and power gains throughout the power band. Includes one PAIR of modified throttle bodies.


Stock TB size 60mm

Upgraded TB size: 62mm


Have anyone purchase these?

Well a few guys have upgraded TBs, and $900 sounds like a terrible deal

Yea the price is very steep. Pretty costly. Yet does this actually work?

I have been thinking about getting this for some time now. I might do it and see how it goes. but I will be doing ported intake and ported lower intake at the same time. then dyno it to see if difference. be next year though

$900 for 2mm........ thats not even 1/10 of an inch

I've been thinking about purchase, but decided to wait until some used one appears on Yahoo Japan auction and grab it with better price. The chipest ported TB among Japanese brands I found is Fujimura which is 700 USD

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I use 80mm throttle body and it works great.

Where did you get 80mm throttle body from?

Ls1 motor?

It's from some other Nissan with single throttle body from Japan, so it's a direct fit with the electronic control plug. I only needed to adjust the a/f ratio with the new 3" intake.


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

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andy can you confirm part number? thanks :)

so you basically take 2 80mm tb's and they direct plug and play with the 370 connectors?

I already have 2.75 or 3" I cant remember intakes with no neck downs etc.. that required a new maf mapping and AF change. wonder if I could make this switch and see gains.

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


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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!

pm price for spacers please!

Are you sure that it bolts on to VQ37 plenum?

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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?

I have no idea but it's all I've found so far.

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

http://i39.photobucket.com/albums/e1...psro5qkk6m.jpg

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. :tup:

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

Any info on your upper plenum?

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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 ;)

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.


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

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We just need a manifold, so many Empty promises

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

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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.


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Crazy like $3k +?

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For now the CNC one is around there, but I'm trying to see if I can use other method to get it to around $1k or below.


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Yes, it's taper.:happydance:

...

This is still designed for turbo application tho!


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Hey Andy did you ever dyno your throttlebodies?

N/S's will have to sort to a dry sump to make that manifold worth it