I have looked into them too, I bit the bullet a few years back and got a kinugawa td04hl for a saab 9000 turbo, many people said they were rubbish and would explode etc. the saab was putting down 300+HP to the front wheels and was a absolute weapon, still too this day that turbo is going strong. the price of the NPower / TOG turbos is quite reasonable too
some nice second hand 2530s on yahoo japan buy em cheap rebuild if needed cheap as ! http://page8.auctions.yahoo.co.jp/jp/auction/h209531285
Thanks for your input mate, exactly why I posed the question here. I'm new to Zed's but an old hand cars wise so I know better than most to search for real world use feedback as opposed to keyboard warrior impressions. Exactly what I was getting at. I know plenty of respected tuners who use the chinese stuff to great effect. Just none of them have used any of the zed specific items like these... I'm not shopping for 600hp per se, but if the headroom is there with a value for money useable propostion I'd be mad not to consider it right? Here's the specs directly from the N Power ebay ad: - Internally wastegated turbine housing - 360 degrees Thrust bearing - Heat treated steel wheel and shaft - Stainless steel dump pipes TURBO SPEC: COMPRESSOR 51.3-trim compressor; exducer 60mm TURBINE 0.64 A/R turbine housing, Wheel trim: 69.4 I was also pointed towards one of the Specialty Z customers in the US who had used the apparently the same turbos under the name Godspeed and these are the specs for those items: Compressor Trim 60 Exhaust Trim 63 Intake side inducer 46.48 Intake side exducer 60 Exhaust side inducer 53 Exhaust side exducer 47.12 Internal wastegate set at : 12 psi Going by the numbers alone it would appear these are not the same turbochargers, however as I said I'm a zed noob and have not been following any of the Yank forums or sites so can't comment if the info is on point or not. They are using these turbos (godspeed) in a drift car and along with inlet/exhaust/intercooler upgrade and a boost increase are making 340rwhp up from 280rwhp previously. If all the specs are to be believed then the N Power units should flow more air but have better spool properties than the godspeed units. If any of these are better than the stock units remains to be seen. Has any of the australian contingent used these items at all? Certainly a good price, but by the time you factor freight and a rebuild I don't know how far in front you'd be. I was under the impression that the 2530 wasnt a major upgrade over stock units, other than having excellent response with a slightly higher horsepower ceiling.
You can really only compare the flow of wheels based on those numbers when the major diameter is the same, compressor wheels are both 60mm so they're comparable. The Godspeed numbers you've posted appear to based on a GT2560, compressor is basically the same and exhaust has a higher trim=slower spool, higher peak flow. To compare the godspeed compressor to the N*power one, the lower trim on the N*power suits quicker spool and will support higher pressures but less peak flow -> less max power. As I said earlier the N*power compressor looks like GT2259 specs so you can compare that to a 2560 here https://www.turbobygarrett.com/turbobygarrett/turbocharger (just the compressor maps). We still don't know what size turbine wheel the N*power run but if we guess they're 53mm major like the others the higher trim would increase lag but reduce back pressure. If that's the case then the quick boost production of the little compressor is probably balanced by the slow spool of the turbine giving a normal-ish boost curve. Maybe like these but with higher efficiencies, but that's a guess https://conceptzperformance.com/Cart/description.php?II=3318 The HKS 2530 is a big upgrade, it's a hair larger than the GT2860s that Black Beast is running, you're probably thinking of JWT/Z1 530bb which are little ball bearing units. Make sure you get the bigger SR/RB20 version though, I think they do a version for the GTR with little housings and smaller trimmed wheels which will choke earlier. You're welcome to take your chances with these but the majority of the members here prefer to pay the extra for the one in a million failure rate rather than one in a thousand. If you do run these keep us updated on how they go.
lol it would be a hks GTX 2530 seriously good deal on those. i had mine rebuilt when they came over from japan not that expensive either
Like tassuperkart, I get frustrated with people constantly bagging chinese turbos when they have no experience with them! I have had both good and bad and find the smaller scale chinese turbos tend to be more prone failure as I found twice with some chinese twins on a 1jz. Although I ran some cheap chinese t28 copies on my zed without any issues. On the 1jz I converted to a single with a chinese T70 that set me back $300 roughly 7 years ago. It was meant to tie me over for a year while I save up for a decent turbo but I have done over 200k on that turbo and it still shows no signs of failing!
Makes sense, smaller turbos typically have higher wheel speeds than larger sizes so balancing errors are going to be more pronounced. 2/4 (or 4/7?) is a pretty high fail rate and I'm sure most of the people here know at least one person who has tried a no-name turbo and had it fail, my cousin's R32 got maybe 2.5 years out of a KKR. (not a distant cousin, he lives around the corner)
Problem is that its an engine out job and 2 turbos to replace if they fail. Unlike a single turbo inline 6 set up ..easy access Not worth risking with the Z .
