Guest Anonymous Posted September 9, 2000 Share Posted September 9, 2000 If you could choose any turbo, for a vg30t engine, what would it be? Not using the OE manifolds opens the possibility of using any turbo I want, any brand, any configuration, etc, etc. Does any 1 brand have advantages over other brands? (I know a guy who's porch[sic] got keyed because he had a KKK turbocharger sticker on it) Garrett? Mitsubishi? KKK? IHI? I'm only familiar with Garrett stuff and am just wondering about other choices. ------------------ Morgan morgan@z31.com http://carfiche.com http://z31.com [This message has been edited by Morgan (edited September 08, 2000).] Quote Link to comment Share on other sites More sharing options...
Owen Posted September 9, 2000 Share Posted September 9, 2000 I heard IHI turbos are good if you get the ball bearing ones. Or the HKS T-54? or Trust T-88 or t-78 hybrid. These are all big bucks though. Owen ------------------ http://www.homestead.com/s30z/index.html Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 9, 2000 Share Posted September 9, 2000 Yeah, I dunno about spending $600 or so on a BB turbo. That's a real nice set of tires and a pair of cams too! I just meant in general, is one brand generally regarded as better is some random aspect than others? More reliable? Cheaper? etc, etc. edit: I mean an EXTRA $600 on BB option, not $600 total of course. ------------------ Morgan morgan@z31.com http://carfiche.com http://z31.com [This message has been edited by Morgan (edited September 08, 2000).] Quote Link to comment Share on other sites More sharing options...
Drax240z Posted September 9, 2000 Share Posted September 9, 2000 I'm not too familiar with the other types other than Garrett myself. But I'd probably suggest something around a T04, or a T3/T04 hybrid. Try checking out this site for their turbo calculator: http://www.turbofast.com.au/javacalc.html I hope that helps you out. ------------------ Drax240z 1973 240z - L28TURBO transplant on the way! http://members.xoom.com/r_lewis/datsun.html [This message has been edited by Drax240z (edited September 08, 2000).] Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted September 9, 2000 Share Posted September 9, 2000 My stock GN turbo is now up for sale. Makes the stock VG30T turbo look puny. Nice and tight, ported and polished compressor and adjustable wastegate rod. It is a Garrett, if you are interested in brand name. Went 11.50@117.24 with it. ------------------ Scottie 71 240GN-Z http://www.mindspring.com/~vscott911/gnz.html Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 9, 2000 Share Posted September 9, 2000 Wastegate? Is it a t4? What are the specs on it? Is it water cooled or not? How much you asking and what kinda condition is it in? I have a gimpy stock t25 that I'll use to get everything running and sorted out, then worry about finding a real turbo. ------------------ Morgan morgan@z31.com http://carfiche.com http://z31.com Quote Link to comment Share on other sites More sharing options...
Drax240z Posted September 9, 2000 Share Posted September 9, 2000 So Scottie, what is your future turbo going to be? And what are your 1/4 mile goals for it? Hmm, I wonder what that turbo would do on a L28... ------------------ Drax240z 1973 240z - L28TURBO transplant on the way! http://members.xoom.com/r_lewis/datsun.html Quote Link to comment Share on other sites More sharing options...
Mikelly Posted September 9, 2000 Share Posted September 9, 2000 My limited experience with turbos was primarily with Garrets, but I did do sa tone of research a few years back and the T3/T04 Hybrid was the smack back then... I'd look into those, and the BIGGEST intercooler you can find... Guy I know had a 240Z with a Mazda RX7 2nd generation turbo motor in it with a Garrett T3/T04 with a Mack Truck intercooler stuffed in it... Thing was scary fast. By far the fastest accelerating car I have ever watched at an autoX! That creation was another beast from the ZDr. folks in Roanoke, VA! Mike ------------------ "I will not be a spectator in the sport of life!" mjk Quote Link to comment Share on other sites More sharing options...
Owen Posted September 9, 2000 Share Posted September 9, 2000 I heard a lot of good stuff about the Garetts. I think HKS uses them too. I'd recommend a hybrid for good response and top end power. Like someone mentioned, a big intercooler is absolutely necessary. I prefer front mount over the water cooled units. I think Spearco has some kind of sizing tips for different applications, you dont want to go too big, because of pressure drop. Friends who have used Spearcos say their fin designs arent as efficient as the Apex type but are a couple of hundred cheaper...your choice. I would also go with an adjustable external wastegate but you could alwasy put washers under the spring of the internal wastegate types too. You could also get the turbine wheel of a stock turbo trimmed to the specs of an expensive aftermarket turbo. Owen ------------------ http://www.homestead.com/s30z/index.html Quote Link to comment Share on other sites More sharing options...
Arif Posted September 10, 2000 Share Posted September 10, 2000 I used a t3/t4e garrett turbo on my L6. I think it's more important to get a reputable shop (Majestic Turbo, etc.) to build one to your specs rather than looking for the best brand of turbo. I had one built that was water cooled for $575 plus $150 for an external wastegate. Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted September 11, 2000 Share Posted September 11, 2000 My future turbo IS (yes, I got it) a PTE-51. I got it Friday night, slapped it on and ran today. Major spoolup problems at the line. According to my data logger, I did not get full boost until 3+ secs into the run, but still got it to run 11.53 @ 120.51mph 60' was horrible, 1/8 ET was slower but 98+mph. I suspect the problem is this custom 3" wastegate elbow and the wastegate puck is not properly aligned with the wastegate hole in the turbine housing causing bleedoff. Once I get it fixed, I should be running 10.90s @ 120+++ with a little more boost and tuning. That might be a little while because I blew an oil line or the oil pump and dropped 1.5 qts of oil on the track The entire engine is covered in oil. Normal oil pressure, no oil in water or vice-versa, no overheating. All feels OK but just a little rough. This might be an excuse to pull it and freshen up the bottom end in anticipation of 450hp So much for my adventure. The stock turbo I just took off is a T3 but huge by import standards. I do not know the specs, but to give you some idea, some turboZs hog out their compressor and stuff GN wheels in them. I am asking $275 complete with the wastegate housing and adjustable wastegate rod. If you are interested I will snap some pics and post them. It is "pretty", ------------------ Scottie 71 240GN-Z http://www.mindspring.com/~vscott911/gnz.html Quote Link to comment Share on other sites More sharing options...
clint78z Posted September 11, 2000 Share Posted September 11, 2000 I think I am going to have to agree with Arif, the maps are a guide . The rael power and drivability are from trial and error on the dyno, and shop experience . Since we can't try turbo's on like a pair of pant's, check and see what others with good sucess are running . HKS and Greddy are Garrett cores I think . I think the T04E/T3 57 or 62mm wheel with the stage III turbine and .63 A/R would be a nice street setup and would get you into the 11's in 1/4 mile . After studying turbo's for a long time compressor maps aren't going to make alot of difference as long as the turbo is not over driven, it doen't surge, and the effeciency doen't drop below 60 percent . The difference in air temp between a 70% eff and 60% is not that much, a big intercooler will chill it anyways . A Jim Wolf package is good lot's of research, a real good way to go!! I recently learned that on big turbo they use a small A/R ratio to spool up turbo quickly, and then use a big wastgate to dump excess backpressure . If you tried this with a small internal wastegate, you would choke high rpm and load in your motor . Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted September 12, 2000 Share Posted September 12, 2000 If anyone is interested, here are pics of the stock GN turbo I have for sale. Morgan, the 1st pic shows how it it is mounted on the GN and how it could be positioned on the VG30T. ------------------ Scottie 71 240GN-Z http://www.mindspring.com/~vscott911/gnz.html Quote Link to comment Share on other sites More sharing options...
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