Chris_72

OK, so I know that I will get flamed for this, but whatever...

I found a turbo on eBay (yup its a Chinacharger, not a real turbo) and I want to try it. I have an HKS cast iron manifold and I am looking at a T4. This caught my eye, because they say it's specially sized to work with a rotary engine. can someone tell me approximately what RPM I can get full boost with this turbo? I am only looking for about 12 - 15 pounds. Any suggestions on a better Chinacharger to go with? I want to find a good sized turbo that comes on strong and fast. Looking for 350HP.

I AM NOT INTERESTED IN COMMENTS TELLING ME NOT TO USE EBAY JUNK!!! I KNOW IT'S JUNK, BUT I WILL PROBABLY GIVE IT A TRY JUST TO SEE HOW THE SINGLE TURBO FEELS. THANKS

alexdimen

iTrader: (13)

If that compressor wheel grenades, where will all that metal go?

windom

iTrader: (1)

boom goes your engine

Chris_72

WOW stupid move #1. The ebay # is 140262095733
Please check out the specs. Let me know if the specs sound good. Lets be realistic. I know I will have to balance the turbo before i install, but that is cheap. If it is properly balanced, it should not fly apart.

oo7arkman

iTrader: (2)

I am not sure you will find anyone else on here dumb enough to put one of those things on their car..... Was it found on ebay when searching for rx-7 parts/turbo's? Then of coarse the ad says it was specially designed for the rotary. At least the guy selling cheap *** parts knows how to advertise.... Please sell your car before you hurt it....

Miata_mx5

Sell your car, please.

Chinaman junk = fail. Especially when the stock twins can support 350 horsepower. If not, there are always BNR Stage 3s or Knightsports Upgraded twins good for slightly over 400 horsepower.

As a guy owning an rx7 you should know this. Try it on a tercel instead if you want to blow something up.

Chris_72

Well, here is the lowdown - I just want this turbo for a week or so. I want to run a single turbo car for a little while. If I like it, I will get a real Garrett BB turbo. If I don't like it, I will be selling the HKS manifold, wastegate, and downpipe, and will be fixing the factory sequential turbo (and probably go for the Stage 3s from BNR) I sold an old car that I didn't use, and now I have some cash to spend on the 7.
So as it stands, I want to try the single - without dropping $3000 for a good setup, and end up being stuck with it if i don't like it.
I really don't think it would grenade in one week.

Rx7_Nut13B

iTrader: (1)

If you do get this turbo make sure you install some sort of catch for the metal "That Could, not saying it will"

Most of the time if your intercooler has fins inside then it will catch most if not all the metal that the turbo can shot out.

I say run it and see how you like it, just remember that the tune you have right now will not work with that turbo, 10psi on twins doesn't equal 10psi on a single.

Try this turbo, at least it is a name brand

EBAY LINK

Chris_72

Rx7_Nut13B Thanks for being the first person to actually give me some actual advice/useful information about this. I also appreciate the link to that Borg Warner TO4H. I'm down for that turbo.
Thanks again.

Also, yes, I do understand that 10psi stock twins and 10psi big single are totally different, and do require different tunes.

Mahjik

iTrader: (1)

Looks like a Miata guy tried one out:

http://www.miataturbo.net/forum/showthread.php?t=5894

Not a rotary engine, but some info....

pp13bnos

iTrader: (1)

Whats ironic is the guys quote under his sig.

RacerXtreme7

iTrader: (2)

Typical china JUNK. It’s a midsized T04B with a max output of around 340~360 at the wheels. It’s a small to midsized turbo for a rotary yet it’s going to spool up pretty slow because the BIG 1.15 A/R turbine housing and clipped turbine wheel (P-Trim). These are NOT rotary specific turbo's. The specs on these originally were old school BorgWarner/AiResearch/Garrett turbo's spec'ed and produced for OEM diesel engines. There was quite a large surplus of these things and they flooded the ebay market. Well, some savvy marketing dude in china caught on to this flood of surplus turbo's and made a knock off of it. Now there’s a flood of the same spec turbo all over ebay but its China trash, along with the "T04E's" that seem to be everywhere. These shitty turbo's have all sorts of written specs using buzz words and incorrect turbo nomenclature like "60-1", t04S", and incorrect spellings such as "MAYOR" instead of MAJOR lol. If balanced, these turbo's actually hold up decently for a little while. But straight out the box they can last from hours, too months. The materials are suspect, and I doubt they'd hold up very long, especially rotary heat (think melted turbines, cracked turbine housings and compressor wheel fins disspearcing.

And by the way... another idiotic tidbit about your sig, SARS was a China epidemic, not Japan

~Mike.................

oo7arkman

iTrader: (2)

The high cost of going single turbo is hardly in the cost of the actual turbo itself... Although it is the most expensive single-item on the list, it is a fraction of all the suppourting costs to going single turbo... With that said, investing all the cash it takes to go single, you need to decide to either remove the twins or not. There is no really cheap way to "try out" a single setup. Not to mention like RacerXtreme7 noted, the a/ on that china junk is large and may not feel like another single turbo that you may think about purchasing. If you go with a smaller GT35 it will spool close to as quickly as your twins and have great power potential... I truly am trying to be helpful here, but it seems as if you need to do a LOT more research about converting to single turbo before you make the plunge...

But if you are still set in your ways of trying it out before you invest in a good/new turbo, then you need to figure out what size compressors (what turbo) you really want and get a cheaper version (rebuilt/used maybe). If you do not at least do that, it will still be a mystery if you will like the setup once you get a new turbo.

Truly it sounds like you may be REALLY happy with the BNR's... They are a GREAT setup and provide lots of GOOD, usable, linear power. But again, this is just me trying to be helpful.

Chris_72

RacerXtreme7 and oo7arkman: Thanks for the useful info. This is the reason I started the thread. what seemed like a good idea, is changing with the experience/knowledge gathered from people like you. The RX-7 community is lucky to have people like you. I was thinking that the 1.15AR was a bit on the large side. The actual turbo I wanted to get (if I were to commit to the single setup) was a Garrett GT3582R #714568-3 with the optional .82AR hot side #740902-11. What is your opinion on that? From my limited knowledge on turbo sizing, I figure this would be a decent turbo that would provide reasonable power with a good quick spool time.


pp13bnos: I never made fun of you, nor do I plan on doing so. Please keep useless comments like that to yourself.

hsitko

iTrader: (1)

Yeah man, i'm with these guys. You are making a mistake by going cheap here. The turbo really isnt the expensive part in going single. Every other supporting mod is. So you will modify the crap out of everything else, get it tuned for the single you got off ebay and then if you dont like it you will take everything off? What is the point in all that? I must say that i'm surprised you are a 3rd gen owner. Not typical behavior from someone with one of these special cars. Going cheap is not something a 3rd gen deserves. Do your research and pick a single that will spool like you want it and make power where you want it. There are plenty of people here who will tell you exactly what to expect with a mod list to help get you started. Dont act a fool, you jive turkey!

oo7arkman

iTrader: (2)

That is a good proven turbo. You really need to decide what kind of power goals you have. If you want a super-fun car to drive that spools up quck and ends up around 400whp then like I suggested before I would go with the BNR's. If you are determined to go single then the GT35 or the apexi RX6 are two good options.

PLEASE!!!! If you decide to go single do NOT purchase ANY cheap *** parts and make some shim-sham single turbo set up.. Truly, to do things properly it is going to cost you in the nieghborhood of $10K to pull off a proper single conversion from fuel suppourt (inj., pump, lines, fittings, rails, reg., inj resistors/harnesses), the turbo, manifold, wastegate, new gaskets, new vac lines, turbo oil lines, turbo water lines, air filter, boost controller, heat shielding, and the list goes on my friend. Plus there are TONS of B.S. misc costs from things you find that need tidied up while you are in there. Lots of low-cost item add up VERY quickly. If you do it, it is worth doing ONCE, and doing it RIGHT... I am not saying you go out and buy the best of part x to accomplish each small piece of the single turbo puzzle, but correct, quality parts do cost...

jamespond24

iTrader: (13)

I said go for it! Just remember you get what you paid for so go help yourself, I'll be looking for your post soon on 3rd section about a blown motor or turbo. Good luck.

Dudemaaanownsanrx7

iTrader: (23)

it looks like that turbo will need an exhaust flange welded onto it for the DP to connect to.

If your motor isnt street ported and that is the a/r (1.15) for the exhaust it will probably spool pretty slow. Since you are only looking for 350 hp, there are smaller options available that will give much better spool up, and be more fun on the street.

From what i've come up with it seems like a garret to4B is similar to the stock twins output, as a non ball bearing turbo. So anything larger will an improvement power wise. The GT35 is a great street/race turbo, it spools very quickly and can put out a good 400ish HP at 15-16 psi

A 60-1 is also a good turbo but a bit more laggy. With a 400 + HP range as well. Cost is lower because of the non BB.

I Agree that the turbo is really not the expensive part. Even if you source things out very very cheap and do all the work and fabricating yourself, it will still cost alot. If you have the money i would do it. The simplicity of having a single turbo, and the surge of power is all worth it.