My NWP 75mm throttle body upgrade review
 

I got one of NWP's 75mm throttle body kits. He had some great claims and good research to back up what he was doing with the project. So of corse is the conquests of continuing development of the vq platform I was hooked. I knew this would be a tough crowd, and this is why I am writing the review. Most people with this platform discredit things for no other reason than it doesn't follow the normal cookie cutter build.

http://www.nwpengineering.com/Phenolic_Spacers.html
Dyno Sheet from NWP
http://www.nwpengineering.com/images...350z-NonRU.jpg
For those that haven't seen it here it is. 100% Plug and Play. No tuning or portwork required. Perfectly port matched. Features a tapered bore for increased airflow!

When I received the package from NWP I was thoroughly impressed with the quality of the adapter piece. Was machined beautifully, came with new hardware and additional gasket.

Install was as simple as unbolting the intake pipe removing the old tb, installing the adapter plate, new 75mm throttle body, plug in Voltage drop adapter harness, then re install intake. Defiantly a diy job with basic hand tools.

Initial Impressions: Car fired right up first try with no need to idle relearn, and a very steady idle, it didn't idle hunt like my previous tb. It was very steady.

First drive and rev ranges. The throttle response is fast and crisp. The butt dyno says that it is making power in the upper rpms, and did not feel any noticeable lost down low. It seems to be really pulling in the 5k plus rpm which is consistent with the dyno charts that I have seen from NWP. I will be doing additional testing in the next couple weeks and will eventual be doing some dyno testing with before / after and retune.

In closing, I am impressed with the upgrade and think is a very good bang for you buck that will compliment most other bolt on mods on the market. Especially those that are trying to squeeze every last drop out of there motor.

Note: If you are using t-bolt clamps and very stiff couplers you might need a larger size to accommodate the additional size of the new tb. I was able to stretch my silicon coupler over but needed a larger t-bolt clamp.

Side by side comparison of the stock vs the new 75mm Tb
Front
http://i42.tinypic.com/fwj3wl.jpg
Rear
http://i39.tinypic.com/xkod1x.jpg
Installed
http://i42.tinypic.com/jae0s2.jpg

Im going to buy one. For 365$ if I get 5hp ill be happy

In for more info and dyno numbers!
You are turbocharged also, correct?

I've been waitin on this review! They claim 15+hp but it's all in high Rpm's. what do you guys think it will do on a n/a z? Should be the same huh?

keep us posted, man. definitely wanna see those dyno charts.

Thanks Danny, sub'd for dyno updates

Yes I am greddy 18g, cosworth, bc stage 2 cams, 3" dp / exhaust.

Yes the gain are mostly felt in the upper rpms, from what I can tell. I know all there testing was on n/a platforms. So you should see similar gains to what they have dyno'd

if you post a good dyno....ill buy it! Want to see the gains with TT/cosworth and this TB.

Thanks! That's what I was thinking. I talk to the guys at nwp via Instagram. They tested it on a 06 non revup? I think. I want to see how it affects fuel economy and if the horsepower in the high Rpm's is worth it. But for the price, it's probably the cheapest horsepower you can get.

Op, how long did install take?

I can answer the install question...it's the same as installing an OEM throttle body except for the adapter harness, which adds on 5.8 sec. It's seriously a 20 min job.

in for #s

This mod is not going to kill fuel economy, unless you want to keep testing your new found power.

As said it takes no longer than 20 min with some basic tools.

Sub'd for dyno results

How is everyone getting theres before me ! I paid for express shipping and its not getting here very express :mad:

I will also be posting before and after dynos when I get mine in but I will be retuning for the tb

good review, now just need data to confirm.

too bad they didnt work with a much bigger TB. Its free to increase the duty cycle on the wastegate solenoid.

I'll assume this mod is probably a waste of money for low boost applications?

I have/had a 2006 Rev-up, which I realize is going to have a little more top end than a regular DE but that dyno chart looks phishy at best. My peak power on a stock baseline was at 6k and held flat to 6.5k rpms and my torque curve was pretty damn flat through the low to mid range. Granted it's been a while since I've looked at stock DE dynos but, eh. I want a 3rd party dyno chart.

Just ordered mine! Hopefully it'll be here by the end of the week.

I'll let you guys know how it feels on my Revup.

Here are my engine mods currently:
Furookie Intake
Non-Resonated 2.5" Test Pipes
Invidia Gemini Exhaust
Motordyne 5/16 Iso Thermal Plenum Spacer
Motordyne MREV+ Intake Manifold
Motordyne Copper Iso Thermal Upgrade
Cobb AccessPort

+1

I wonder if the throttle body itself has more smooth control or anything over stock that would help with power delivery for a boosted car going from vac to wot.

this seems to be a normal stock 350z dyno before and after uprev tuning
https://my350z.com/forum/attachments...imathianos.jpg

This is the nwp TB
http://www.nwpengineering.com/images...350z-NonRU.jpg

The NWP doesnt exhibit the flat 5500 to 6200 trq curve, and really takes a dump after 6000 rpms. Not typical of a properly running VQ35

Granted the dyno is just for showing before and after changes, a 3rd party dyno will be great!

I just noticed that the NWP throttle body lost peak hp and torque...yes I realize that it matters that it had big gains up top (allegedly), but I don't like that dyno at all.

Should have mine next day or 2 and I'll be on the dyno monday :thumbup:

Waiting to see results as well as everyone else !

When you guys do the dyno, please don't go there with the TB already installed then post up the results with a before from whenever. Make sure to do the install on the dyno so that nothing but the TB changes between your runs. If you can, it'd also be great if you can do like 3 runs before, 3 runs after, and 3 runs with the stock TB again. That way, you can also attempt to control for the ECU possibly compensating for the WOT pulls you're doing. Since this is supposed to be a bolt-on affair, there shouldn't be any tuning either. Please? :D

I'm really excited for this. The more scientific analysis of this we can get, the better. Looking forward to the results!!!

man I hope they are going to make a kit for the hr

I just installed one of these kits. Super nice with perfect fitment. Car drives like stock just with more power.

Interested in seeing this on a Rev equipped car. I assume this is 75mm In / 75mm outlet with the spacer being tapered to match the stock plenum diameter. Any experimentation of porting the plenum to match and throwing out the spacer? What is the diameter of the OE tb?

70mm , and I am porting my spacer and V+ intake right now. I'm also doing some work to the TB, it needs countersunk screws and some grinding to the shaft.

I talked to a guy at NWP who told me to keep a taper in the adapter plate/spacer to improve air velocity. Also, the throttle body cannot be used without the spacer due to the mounting style.

I've asked for a dyno plot of a Rev-up engine as well, hopefully they did testing.

Fail

what ever came of this goblin? have considered it to squeeze a little more out of the car. but would be great to see some 3rd party dynos.

Your car is plenty squeezed

so assume no-one else has had any independent dyno results still?

I gained 1whp. It also leaned out the afr about .5 or so.

LOL well im sold haha

So should I save my $400 or what?

save your $$$

I completely agree^ I've been lurking around these different threads hoping to see some positive results...but that dyno chart from NWP is garbage. It still faceplants really hard...and loses peak hp and tq? Yeah, no thanks.

Grassroots Motorsports did a piece on this upgrade in its August 2015 magazine. They did back to back dyno testing of this upgrade and found that there is a 5 hp increase between 4800 and 5500 rpm. Since that is the sweet spot if you track your car then maybe $350 for 5hp is worth it.

Did they do a tune before and after? If not it could just be leaning out the tune. When I tuned the throttle body we didn't gain anything.