China 64mm TB knock-off
 

I was trolling around and came across this. Very similar but likely not the same qualit. Still though, has anyone tried or even seen this?

https://www.aliexpress.com/item/PQY-...f-c460ef89c255

It's already on Ebay as well at $96, has been for a couple weeks.

I'm convinced enough that it's 100% exactly the same part that i'm putting one on my DD.

Does a larger TB alleviate the effects of not having a square top?
Obviously it allows more flow into the intake manifold, but is it significant enough to make a difference?
Its much cheaper than a square top.

Mainly it keeps your throttle from breaking and killing your motor.

no

Just wait until the matching intake manifold is on alibaba too.

I'm going to run a 70mm TB on Hater. Because i can.

WhyI'llNeverSendDrawingsToChina.html

hahaha right?
The knockoff is getting knocked off.

Interesting. I'm late to the party then. I was waiting to pick one up used just for safety's sake but this is intriquing.

Probably just changed the CNC code a touch and few different bolts n bearings. Likely see these popping onto cars soon.

I doubt they did that. My theory/hunch is that it's the same part made on a different line in the same factory, it's just not getting the last step of "put it in a Skunk2 box."

Skunk2 has been making this throttle for a loooonnnggggg time. It wasn't changed much for Miata application.

lol "changing things" is way too much effort for these places. the only things they actually "modify" are leaving off the previous companies logos and emblems.

or maybe it's not even that. maybe junk2 slaps their emblem on when these things arrive stateside, so in china these "knockoffs" are the actual part without even anything left off.

Yup, same as Junk2. I was somewhat seriously thinking about buying these in bulk on Alibaba as they're about $50 each there.

I'll wait until someone can compare it up close to the Junk2 TB. It would be tragic if I bought the cheap knockoff to prevent catastrophic engine failure and then the knockoff failed..
The Junk2 suddenly becomes appealing in the <$100 market. I find it mind boggling to buy a $250-300 TB and then have to dick with it to make it work properly; it's much more palatable for $80.

.

Just to clarify, what is the total set of fixes for a skunk 2 TB. I will upgrade to one of these over my epoxied stocker.

From what I have read and searched, the fixes for the skunk2 TB are redrilling the spring engagement hole so the throttle doesn't stick, and I read something about loctite, and some longer allen heads, but I didn't see it in once collective place, just spattered between build threads and whatnot.

Hmm. I didn't do anything to my junk2 aside from get slightly longer bolts, but sometimes it idles high. maybe I need to do that spring mod.

I hate overpaying for stuff. shoulda bought the knockoff haha

Minimum order quantity is 10 on aliexpress, buy a bunch and throw on a "Junk2" sticker on it and undercut OBX pricing.

OBX Billet Throttle Body Mazda Miata 99-05 1.8L 64mm BP-4W, BPT, BP-Z3 All | eBay

I only listed OBX since they're shipping from the states.

Great idea! I have a laser etcher at work, maybe we can engrave the mt.net logo on them and sell them on ebay for more than the Junk2 = PROFIT!

Lol, if you did the throttle body sticking mod, it probably would be better than a legit skunk2 tb.

Anyways, I went ahead and bought one for science. If someone that has a legit skunk2 TB we can compare dimensions/quality/bearing/etc. if you guys want.

I have both. I'll dig my Skunk2 out of storage and do some comparisons for the group in a couple days.


https://cimg6.ibsrv.net/gimg/www.mia...1b3ea934d8.jpg

I ordered one for science as well. We shall see.

My Skunk2 doesn't have the lower right corner (in the pic above) milled off at an angle like that. Also less machining marks around the mounting holes and finish looks different on both the main body and the "cable cam" or whatever you want to call that part. Very similar otherwise. Not sure how old my Skunk2 is as I bought it unused off someone else but it looks like all the pics I've seen of them. Did they ever change the main body design at all?

China SKUNK TB knockoff review
 

I mentioned ealier I had a SKUNK2 throttle body and had bought one of the China knockoff items that caused this thread [both 99-05 fitment]. Below is a quick comparison of both items [my SKUNK2 is used but cleaned up]. Any questions, or anything you feel I missed send me a PM and I'll try and answer it.

One of my customers happens to be a manufacturer of production throttle bodies so there's a few things I know wouldn't pass muster with them and that went into this.

1. Machining finishes & visual

The SKUNK2 is definitely a better finished product. The coating is much smoother vs the unfinished aluminum of the China knockoff. Also, the machining of the knockoff, while likely meets with whatever mfg tolerances they use it doesn't match up with throttle bodies I see at one of my customers who's in the business.

Several of the edges of the knockoff are sharp and they haven't taken the time to do much more than a cursory manual deburring. Definitely no thermal deburring process here....


https://cimg4.ibsrv.net/gimg/www.mia...1742725906.jpg


https://cimg5.ibsrv.net/gimg/www.mia...1ea9a9d856.jpg

2. TB Bore
One of the things you watch for in TB manufacturing is the actual finish of the TB bore and the transition areas where the angle changes and the butterfly is. You can clearly see, at least in this example, the China TB has some surface finish flaws especially below the butterfly. The SKUNK2 is well finished with no surface imperfections. I haven’t taken the time to do a profilometer check on the finish.

An area of concern is the intersection of the butterfly shaft and the throttle body bore. On both sides of the China unit the cross shaft flats are carried into the wall of the throttle body. As bearings wear and allows any movement of the shaft this could cause a problem where the shaft starts to dig into the body. The SKUNK2 unit carries the full diameter of the shaft out to this area and theoretically provides better support.


https://cimg0.ibsrv.net/gimg/www.mia...cc5d55c096.jpg



https://cimg2.ibsrv.net/gimg/www.mia...6586bbdfce.jpg


https://cimg1.ibsrv.net/gimg/www.mia...edaf9260c8.jpg



3. Pulleys
The SKUNK2 pulley is a fully machined piece of aluminum whereby the China TB is a plastic pulley. I haven’t disassembled the China TB to look at the internals where the pulley connects to the shaft but I expect the aluminum machined version is a lot stronger. Also, spring pressure seems the same although I haven’t checked with a guage.


https://cimg1.ibsrv.net/gimg/www.mia...67226e85e4.jpg

4. Butterfly shaft
Here’s where the 2 products differ significantly.

Cross shaft Ø:
SKUNK2 10.88
China TB 9.71

Across shaft flats:
SKUNK2 6.8
China TB 6.8

My unit is whatever version sold by SKUNK2 in 2014 so if there was a change I guess the China people haven’t caught up yet. If I was worried/concerned about the cross shaft breaking and destroying my motor this’d be the deal breaker. Also, the SKUNK2 product uses allen head screws vs phillips head screws to get ample tightening torque. I notice no threadlocker on the China screws so if you’re using one, best to add some red threadlocker before you install.


https://cimg6.ibsrv.net/gimg/www.mia...7d17c7f25.jpeg

5. SHAFT BEARING
Looking at the bearings, it appears both bearings are about 1mm difference in the OD and the difference in cross shaft is accommodated with a thicker inner race in the China TB. You can easily see the difference in the picture. Of interest is the difference in the tang that engages the TPS. I'm not sure why the significant difference and I haven't fit a TPS to the China product.


https://cimg0.ibsrv.net/gimg/www.mia...b238e6d48e.jpg

6. Misc
Most of the surfaces, but not all are identical, and close enough to the SKUNK2 to imply a copy [possibly of an earlier SKUNK product]. Things like the IACV cover plate are identical. The obvious things are in attention to details like sharp edges on machined surfaces, no coatings to protect from corrosion and removal of machining burrs.


https://cimg5.ibsrv.net/gimg/www.mia...2bbb05b518.jpg


The differences noted are what I see visually and can measure without a full disassembly.

^Thats some post! Thanks, bahurd!

:likecat:

Wow thank you!

Awesome post! Poscat!

So an 100 dollar Throttle Body that needs 500 bucks worth of my time to fix? GAHH! Alright, gimme one please. I'm so sorry US manufacturing. I feel like a total pos.

I have decided fixes when i get mine i will get allen butterfly screws and loctite them, then i will redrill the spring hole. Ill also measure and compare to stock unless someone beats me to it.

My Skunk2 looks like the top pic. Bottom one is from Bahurd's post. Notice the bleed screw (or whatever that is) position is different on the bodies. Did they change these at some point? I assuming they must have. Curious which one is the current design. Think I've seen both in pics. Noticed mine doesn't line up the best with the lump on my squaretop.


https://cimg1.ibsrv.net/gimg/www.mia...39338a6ead.png


https://cimg4.ibsrv.net/gimg/www.mia...d57ea00526.png

Diff between 1.8NA and 1.8NB throttle bodies??? What year car?

Adapter is the only difference between NA and NB to the best of my knowledge.

My Junk2 also looks like Julio's. Car is an NB.

Yep. Mine is an NB but they are supposed to be the same except for the bolt on adapter plate for the IAC valve like Concealer mentioned. I'll have to send something to Skunk2 and see if they will chime in. I'm curious now as to when these changed.

I noticed that when doing the comparison. The China TB looked pretty much like what yours does. Maybe you could measure the OD of the butterfly shaft [not across the flats, that’s the same]. You might find yours is the smaller diameter?

Not sure what Skunk changed over the variations but given the breakage problems that probably was one of them.

Like I said, mine is 2014 time frame so recent.

Mine was purchased late winter/early Spring 2015.

The shaft on mine measures 10.88 mm, flats for the TPS are 1.6 mm, paint marker on the allen heads etc. Don't see any other differences other than the bleed screw location. Weird...
I've got my original box with the labels etc and paperwork inside it but don't see any dates on anything at all so that's no help.

Another of lifes many mysteries. Lends meaning to the term Junk2.

Looks like the important thing is the shaft diameter. :riaa:

So the consensus is the Ebay will break and cause your whole engine to blow up into sad cats, even with new allen screws and Locktite?

Just trying to understand some of the comments made since sarcasm is so easy to read on the internet.

Edit: Is the shaft being 1mm smaller for the valve going to cause it to fail?

I don't know if that's the consensus.

If I had a lot of money in a built engine, and had "evidence" of failures caused from a smaller shaft I'm not sure I'd opt for something just because it's cheaper. If I was putting it on an essentially stock engine, for street use, with limited funds and had the ECU to take advantage of tuning maybe why not.

So my real question is: Do you feel that the cheap one is still "stronger" than the oem one in terms of the shaft breaking or not breaking?

Good question. Don't know the OEM material [or the china or Skunk for that matter] so making an assumption they're all basically the same steel it comes down to shaft cross-section right?

I'll try and dig out an OEM one to compare later today.

I just measured my stock 99-05 throttle body shaft. I am getting about .345 or 8.76 mm. So it looks like the cheapo and the skunk turd are all slightly larger in diameter. Again, no idea about the OEM material, or the others for that matter.

I have to admit the shipping from China was pretty quick. I got mine yesterday, and I can tell you it looks like crap. As stated above, the finish is terrible, machine marks everywhere but the most annoying part is all the chips inside the threaded holes.

I'll be taking it apart and posting up my findings in a bit.

Here are some pictures.
https://imgur.com/a/WNuxC

I couldn't fully disassemble the throttle body, there's a gasket that's stuck inside the bore where the throttle plate shaft goes through, and the stupid spring is stuck.

From a super quick inspection, the throttle plate ranges from Ø64.47MM to Ø64.54MM, the shaft is steel, I just don't know if it's hardened (I have some hardness files around here somewhere.)

This appears to be the bearing: https://www.fastenal.com/products/details/4126357 from the part number

https://www.mcmaster.com/#standard-b...rings/=19lhx65

My Junk2 throttle cable cam thingy is made out of aluminum, which can be seen here.

Attachment 229739

Here are the dimensions I got from my shaft.

Attachment 229740

I question how strong the pulley really needs to be. Nylon will probably outlast my car.

Proof enough that it's a cheap copy, not the real thing at less cost. Hard pass.

QFT

And a heads up: some really good prices on the genuine Junk2 99-05 TB on Amazon right now.

Ordered one of these E-Gay throttle bodies and it came in black!?

https://cimg6.ibsrv.net/gimg/www.mia...2677f9666e.jpg

Well i want that.

It never gave me a color option so watch out, You might get a pink one!

Linky?

This is the link to the listing I bought it from.

https://www.ebay.com/itm/322629216054

So they forgot to send me this bolt... 👎

https://cimg7.ibsrv.net/gimg/www.mia...7642f93cf2.jpg

M6x1.0 button socket head. Probably shallow thread length.

I got mine the other day- took 7 weeks and at one time was thought to be lost. Anyhoo, it looks pretty good. A little different than the others, machine marks were acceptable and the throttle cam is aluminum not plastic. The throttle shaft also measures about 10.5 mm in dia. Raw aluminum it looks like. I did not see any color options at the time either. Trade me for that black one?

Thanks for the offer but I dont mind the black.

Word of advise to anyone who hasn't installed theirs yet. Bring your idle control valve with you when you go get the button head screws. They only supply one screw and the other will need a slightly longer one than whats on the factory TB. Also the supplied TB to manifold gasket is cut wrong.

is your throttle cam plastic or aluminum?

It's aluminum.

I am thinking about ording one of these and was curious about the one that came in black. Idk if this was around when you ordered yours but they officially offer them in black now

https://www.ebay.com/itm/New-64mm-Th...paGP3N&vxp=mtr