Chinacharger experimentation
#1
Chinacharger experimentation
I unfortunately destroyed my first chinacharger through turbo noob negligence, but now I am wiser.
I'm curious as to people's thoughts on this turbo here (T25 T28 GT25 GT28 GT2871 GT2871R GT2860 SR20 CA18DET Turbo Turbocharger turbine | eBay)
My previous turbo would almost immediately hit 7psi+ at 3k rpms. (Unfortunately the listing has been deleted, so I can't pull the size data from that).
Now my new turbo, I know from memory is a bit bigger (we're talking an extra 10mm on the compressor imo), and has a .2 higher AR ratio.
I'm only looking for 200ish WHP, is this turbo overkill? Will I be waiting till 5 grand till I feel any boost?
P.S (Yeah I know chinachargers are iffy)
I'm curious as to people's thoughts on this turbo here (T25 T28 GT25 GT28 GT2871 GT2871R GT2860 SR20 CA18DET Turbo Turbocharger turbine | eBay)
My previous turbo would almost immediately hit 7psi+ at 3k rpms. (Unfortunately the listing has been deleted, so I can't pull the size data from that).
Now my new turbo, I know from memory is a bit bigger (we're talking an extra 10mm on the compressor imo), and has a .2 higher AR ratio.
I'm only looking for 200ish WHP, is this turbo overkill? Will I be waiting till 5 grand till I feel any boost?
P.S (Yeah I know chinachargers are iffy)
#3
I'm not racing my car, or anything like that. The maybe 500-800 rpm spool gap that a name brand turbo and my turbo share is fine by me when I can get a turbo for 150$ while I'm just learning.
Also, doesn't really answer my question at all. I'm asking for how much slower this turbo will spool, and basically how well matched it is to a miata 1.8 engine.
#5
I ran that turbo before. If you push it past 350whp or so it will overspin and tear up the bearings. For 300whp it should last for years. Mine had full boost around 3600 or so with ebay manifold on my setup. For 200whp it's overkill but would last forever at that power level since you wouldn't be pushing it much. If you really only want 200whp I'd put a smaller turbo.
#6
I ran that turbo before. If you push it past 350whp or so it will overspin and tear up the bearings. For 300whp it should last for years. Mine had full boost around 3600 or so with ebay manifold on my setup. For 200whp it's overkill but would last forever at that power level since you wouldn't be pushing it much. If you really only want 200whp I'd put a smaller turbo.
I have a 7psi wastegate, I'm thinking that should get me to 180-200 based off of what I've seen around here.
I mean obviously car to car its different, and PSI doesn't mean everything. I'm also running stock exhaust (sort of), till further notice. That will kill some power.
#7
That is pretty much the turbo I started life with. The thing is still in my garage. It started blowing some oil after a few years, but it worked. I want to see someone experiment with one of the ball bearing churbos. If you feel like taking one for the team, try it and let us know.
http://www.ebay.com/itm/GTX2860R-Dua...FYzOl-&vxp=mtr
http://www.ebay.com/itm/GTX2860R-Dua...FYzOl-&vxp=mtr
#8
Ah darn okay. Would you be able to give a guesstimate at what PSI it made 200ish?
I have a 7psi wastegate, I'm thinking that should get me to 180-200 based off of what I've seen around here.
I mean obviously car to car its different, and PSI doesn't mean everything. I'm also running stock exhaust (sort of), till further notice. That will kill some power.
I have a 7psi wastegate, I'm thinking that should get me to 180-200 based off of what I've seen around here.
I mean obviously car to car its different, and PSI doesn't mean everything. I'm also running stock exhaust (sort of), till further notice. That will kill some power.
#9
That is pretty much the turbo I started life with. The thing is still in my garage. It started blowing some oil after a few years, but it worked. I want to see someone experiment with one of the ball bearing churbos. If you feel like taking one for the team, try it and let us know.
GTX2860R Dual Ball bearing Turbo GTX28R Billet Wheel Balanced T25 Turbo Charger | eBay
GTX2860R Dual Ball bearing Turbo GTX28R Billet Wheel Balanced T25 Turbo Charger | eBay
I've been thinking the exact same thing about those new china ball bearings. They probably haven't caught on yet because people don't feel like dropping that much money on a churbo.
#10
The one I ran, when I ran it at 18-20 PSI, up to 8500-9000 RPM, it never showed any shaft play, wear, oiling, nothing. When I tried to run it at 25-30 PSI and rev that high, it started destroying the bearings. After thinking about it, I did some rough math, and I was soooooo far off the compressor map on my setup that it's a wonder the turbo didn't just explode from over-revving it. I was on the next page of the compressor map. I posted pics of it here in a turbo thread. My opinion is it's solid, especially for the money.
#11
The one I ran, when I ran it at 18-20 PSI, up to 8500-9000 RPM, it never showed any shaft play, wear, oiling, nothing. When I tried to run it at 25-30 PSI and rev that high, it started destroying the bearings. After thinking about it, I did some rough math, and I was soooooo far off the compressor map on my setup that it's a wonder the turbo didn't just explode from over-revving it. I was on the next page of the compressor map. I posted pics of it here in a turbo thread. My opinion is it's solid, especially for the money.
#13
I'm just asking because on my last turbo, Cxracing recommended to run a restrictor otherwise the turbo would not be happy apparently.
As it turned out my turbo still burned out, but that's because of other reasons haha.
#14
I'm running the chinacharger linked in the OP on my 2000 LS. Works great. I get positive pressure before 2k rpm's if I mat it, full 15psi by 3500-4000rpms. I'm running an oil feed a restrictor at the turbocharger fwiw. Works good. I think this is a very good turbo for a stock bottom end build
#15
Great timing on this thread lol. Is the outlet a "true" T25 outlet? I plan on using the Flyin Miata cast downpipe for my build but have held off on getting a churbo because of posts like below.
https://www.miataturbo.net/diy-turbo...03/#post840195
#16
Great timing on this thread lol. Is the outlet a "true" T25 outlet? I plan on using the Flyin Miata cast downpipe for my build but have held off on getting a churbo because of posts like below.
https://www.miataturbo.net/diy-turbo...03/#post840195
I don't think the outlet is a "true" T25 outlet. The bolt spacing is weird. You'll probably be able to get 3 or 4 bolts in your flyin miata downpipe.
#18
I used one of these. I have 4 bolts in it: Mild Steel Flange 3" I.D.V-band Flange to TB25/TB28 and T25/T28 5 bolt Adapter
I ended up having to cut the vband off and weld directly to the flange to make a hard enough angle to get past the body of the car behind my turbocharger.
I ended up having to cut the vband off and weld directly to the flange to make a hard enough angle to get past the body of the car behind my turbocharger.
#19
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I used one of these. I have 4 bolts in it: Mild Steel Flange 3" I.D.V-band Flange to TB25/TB28 and T25/T28 5 bolt Adapter
I ended up having to cut the vband off and weld directly to the flange to make a hard enough angle to get past the body of the car behind my turbocharger.
I ended up having to cut the vband off and weld directly to the flange to make a hard enough angle to get past the body of the car behind my turbocharger.