Ben260Z Posted February 29, 2008 Share Posted February 29, 2008 Hi, first i want to say that over the last 3 years i,ve been rebuilding my 260z, if or when a got a problem i just search and read a couple off hours on this forum and problem solved. Thats why this is my first thread,its amazing how much information here is , if you only take your time to read. I have been reading most of the threads on big turbos, and decided to buy a gt35r, after talking to the seller we decide to go for the ,82ar exhaust turbine and the standard ,70ar compressor housing. I got the turbo today its bb and watercooled and its called gt3582r , but it has a ,60ar compressor and ,63ar turbine. I called him and said that this could not be a gt35r its to smal in both ends,he convinced me that this turbo should make 600hp++ and 550whp with an ,82ar turbine housing which he will send me. He is buying turbos from precision in usa, and tells me there are bigger wheels inside this turbo. Precision has there own different numbers around on the compressor housing but i cant find a match on there site. Is it a gt30 ive got?, what do the big turbo guys think? Thanks Benjamin Quote Link to comment Share on other sites More sharing options...
mtcookson Posted February 29, 2008 Share Posted February 29, 2008 GT3076R has a .60 a/r compressor with an anti-surge housing: http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT30/GT3076R_700382_12.htm GT3582R has a .70 a/r compressor with a standard housing: http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT35/GT3582R_714568_2.htm That would be the easiest way to tell between the two. I'd say if it truly is a .60 a/r compressor, you likely have the GT30. There are quite a few turbine options for both, both having a .63 a/r option. Quote Link to comment Share on other sites More sharing options...
Ben260Z Posted February 29, 2008 Author Share Posted February 29, 2008 It has not the anti surge housing but it is stamped ,60ar on it. Is it possible to fit the 82mm(i think) compressor wheel from the gt35r into a ,60ar housing? Precision is mixing and making all kinds of hybrids ,but is it possible to get 600hp out of this one? Quote Link to comment Share on other sites More sharing options...
mtcookson Posted February 29, 2008 Share Posted February 29, 2008 hmm... do you have the numbers for the turbo that Precision put on there? Quote Link to comment Share on other sites More sharing options...
Ben260Z Posted February 29, 2008 Author Share Posted February 29, 2008 On the compressor housing: PTB 150-3550 gt3582rle-05 turbo On the turbine housing flange :thgt3-35r I took some pictures but they are to big to post here. Its garret center section and precision exhaust housing Quote Link to comment Share on other sites More sharing options...
jgkurz Posted February 29, 2008 Share Posted February 29, 2008 As recommended by mtcookson above, take a look at this Garrett link: http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT35/GT3582R_714568_2.htm I've done a lot of research on the GT35R since that's my next upgrade. Personally I think the .70 AR compressor housing and a .63 turbine is the right way to go for an L28. There are HybridZ members that have had success with both the .63 and .82 turbine, it just depends how much lag you can tolerate. If I remember right, I think JeffP is making close to 600HP with a .63 turbine. I think the .82 would make more peak HP but I'm not willing to trade my low-end power. Lastly, on the Garrett link you'll notice that the GT35R is not available with a .60 AR compressor housing and only a .70. Since they are the manufacturer I think I'd trust their configuration to achieve the max rated HP of a GT35R. One more thing, the .70 GT35R compressor housing will NOT fit the L28ET exhaust manifold without spacer. If the compressor is truly a GT35R but with a custom .60 housing it might just fit the L28ET manifold without a spacer. That could be a good compromise. Please let us know how this all works out for you. I'm very curious. Quote Link to comment Share on other sites More sharing options...
Ben260Z Posted February 29, 2008 Author Share Posted February 29, 2008 I have to decide if i will try this turbo that i already got or demand them to take it back and get me an gt35r like i ordered. He will send me an ,82 turbine housing so i can play around with that and try out both, but i,am not sure if the ,60ar compressor is big enough. If i had known what kind a turbo i got and what hp range this turbo is in, it would be easier. He told me 640hp and around 550rwhp, but if you can get that power out of this smal turbo no one would need the gt35r with ,70ar. I dont no i just dont trust him, thats why i need some input from you guys. I have looked at these links at garret before and i dont get a match with what i got. Quote Link to comment Share on other sites More sharing options...
MONZTER Posted February 29, 2008 Share Posted February 29, 2008 I believe Garrett sell the bearing cartridge by itself. The compressor and turbine housings can be purchased separately. I believe people use the Garrett cartridge and then buy a cheap non Garrett compressor and turbine housing. By cheap I mean less expensive as the Garrett stuff is pretty expensive, but I also believe the turbine housings are made of a better material. What did you pay for it? If you paid full GT35R pricing then I would be bummed, but if you got a great deal on it, then that’s probably how. I was just shopping for the same turbo and all of the E-bay 35r's I saw did not have true Garrett housings, hence the good price. Check ATP Turbo. They sell them both ways; usually they only sell the non-Garrett housings for special fitting problems. Quote Link to comment Share on other sites More sharing options...
jgkurz Posted February 29, 2008 Share Posted February 29, 2008 I believe Garrett sell the bearing cartridge by itself. The compressor and turbine housings can be purchased separately. I believe people use the Garrett cartridge and then buy a cheap non Garrett compressor and turbine housing. By cheap I mean less expensive as the Garrett stuff is pretty expensive, but I also believe the turbine housings are made of a better material. What did you pay for it? If you paid full GT35R pricing then I would be bummed, but if you got a great deal on it, then that’s probably how. I was just shopping for the same turbo and all of the E-bay 35r's I saw did not have true Garrett housings, hence the good price. Check ATP Turbo. They sell them both ways; usually they only sell the non-Garrett housings for special fitting problems. Quote Link to comment Share on other sites More sharing options...
Ben260Z Posted February 29, 2008 Author Share Posted February 29, 2008 I have payed for an gt35r $2400 remember its a bit more expensive in Norway. The company i bought it from advertices with garret and precision so i would belive its the real thing , if not the are playing a dangerous game. The seller has more or less admited that the turbo is not what i ordered , but what i am curious about is if i can mount it and be happy , how big a difference is this ,60ar compressor against the ,70ar gt35r ? I,am doing custom manifolds, 680cc injectors,big ic,z32 trans,e6x haltech,coilovers mm,++ so i dont want to mount a to smal turbo. If i send my pictures to any of you guys , could you tell if its a copy or not( i have good closeup pictures), if its i copy i would get my money back and buy it somewhere else. Quote Link to comment Share on other sites More sharing options...
MONZTER Posted February 29, 2008 Share Posted February 29, 2008 I have bought a GT 35r .82 with hopes of making 500 hp to the wheels on a completely built engine and system. I do not believe a 30r is capable of 500 hp to the wheels on our old 2 valve type motor. If you goal is 400hp and better response then I think the GT30 will be great (but I would want it with the Garrett ported compressor housing, and high nickel turbine housing) if I paid for it. That’s just my opinion Quote Link to comment Share on other sites More sharing options...
Ben260Z Posted February 29, 2008 Author Share Posted February 29, 2008 He told me that it maked over 600hp on a modern bmw engine but that dont mean it will make 600hp on the old L28 , iam thinking of returning it. I like it to be i little overkilled and than i have to modified something else:-) Quote Link to comment Share on other sites More sharing options...
Z24O Posted March 1, 2008 Share Posted March 1, 2008 have a read thru some of the info here www.skylinesaustralia.com just bear in mind that the RB heads probably breathe a little better than the L28,but at least you are in the ballpark my comment regarding sizing the turbo would be GT3076 with 0.82 a/r turbine housing for quick,low rev spoolup and good street performance and GT3582 for top end horsepower at the expense of low rev spool,better for all out racing but a bit doughy at low revs there are several other factors to consider..... -auto trans with higher stall converter allows use of bigger turbo and masks turbo lag -better flowing exhaust manifold,custom or power ported standard cast iron,can really aid spooling up of a larger turbo -no point going for a large compressor side unless your motor can get rid of the air through the exhaust side,if it cant due to small turbine side or restrictive head(2 valve,poor design,non ported) or poor exhaust flow....then this will result in a big back pressure differential which will develop a lot of heat,place stress on valve train,overboost internal or small wastegates and generally not help in power delivery -small turbine housings generally cause boost to come on like a light switch rather than gradually,not good for street driving around bends or traction in an S30 -static compression ratio has a lot to do with power goals,low comp engines run big HP on big boost,but there is a lot to be said for running higher comp(around 9:1 to 9.5:1) with a bigger cam to bleed off cylinder pressures and avoid detonation whilst being quite lively to drive off boost on the street -a .82 a/r turbine housing in a GT30 is about the same size as a .63 a/r in a GT35 - i doubt a GT30 will get you 500rwhp(without insane psi and everything needed to support this) on an L28 but it will be much more fun to drive as a street car as with most things in life,it's all about compromise work out how you want to drive the car most of the time and match the turbo accordingly don't get hung up on horsepower figures unless you are all out racing,a formula one car has massive horsepower but would be a pig to drive to work daily keep us posted paul Quote Link to comment Share on other sites More sharing options...
Ben260Z Posted March 1, 2008 Author Share Posted March 1, 2008 http://home.online.no/~btonhe/minebilder.cfm Here is pictures of my turbo, could you guys have a look and tell me what you think? you can see all the numbers precision put on there if you look at the large pictures. This will be a street driven car and a couple track days a year,so i agree with you that its more fun with quicker spoolup for street use. I guess i dont need 600hp as long as the car is fun to drive. Just got a flange today and starting to make an exhaust manifold/header so it can breath i little better. Quote Link to comment Share on other sites More sharing options...
MONZTER Posted March 1, 2008 Share Posted March 1, 2008 It looks like a GT 35r with a T40e compressor housing on it. You will have to pull of the turbine and compressor housings and measure the inducer and exducer size to figure out if the wheels are 35r specs. It’s hard to tell from the pictures, but the turbine housing looks like a 35r. FYI my GT30r has a ported 4" inlet and a 2' outlet on the compressor. My 35r has a 4" inlet and a 2.5" outlet on the compressor. Quote Link to comment Share on other sites More sharing options...
CantZme Posted March 1, 2008 Share Posted March 1, 2008 I can't really tell you anything about your turbo, but like you said...if the seller more or less has admitted that this is not what you ordered, don't settle for it. $2400 is a lot of money and I'm sure you could find a gt35r for the same amount of money or less somewhere else. If I don't completely trust a company for any given reason, there is no reason to do business with them. What if something happens down the line? Just my $.02, good luck. Quote Link to comment Share on other sites More sharing options...
510six Posted March 1, 2008 Share Posted March 1, 2008 That`s pretty pricy for a GT35r http://www.limitengineering.com/gt-35-full.jpg'>http://www.limitengineering.com/gt-35-full.jpg http://www.limitengineering.com/ I would contact Limit Engineering and get a price for a GT35r , I have a plain bearing T67 that they built with a .82 exhaust housing with a stage V wheel that spooled at under 4k.It was about a third of the cost of the GT35r and will better the 35`s horsepower numbers. Currently I have a ball bearing T04S T67 with a T3 .82 exhaust housing with a P trim and It spools at about 3500 rpm from Precision Turbo and I couldn`t be happier with it and when it spools @ 14 psi with the L stroker motor ----hold on. Quote Link to comment Share on other sites More sharing options...
Ben260Z Posted March 2, 2008 Author Share Posted March 2, 2008 Thanks for the feedback, today i took of the housing on both sides, this is what i measured. Compressor wheel 61,5mm and 82mm (inside housing stamped CCE61) Turbine wheel 62mm and 68mm ((outside flange THGT3-35R) As far as i can tell this is gt35r senter section and wheels with an ,60ar housing and a ,63ar turbine housing which ive been promissed an ,82ar. Why they put on a ,60ar i dont know. I,am thinking of trying this turbo and save me a month of waiting, it should be able to deliver since it has the same wheels right? Correct me if iam wrong. Quote Link to comment Share on other sites More sharing options...
MONZTER Posted March 2, 2008 Share Posted March 2, 2008 It does sound like the correct center section, I just have no idea how the standard size wheel will react with the smaller A/R compressor housing. You would need to see a compressor map for that combo, as the standard map for the stock .7 A/R will no longer be accurate. Who knows it might be really good, but then, why doesnt Garrett offer it that way? Quote Link to comment Share on other sites More sharing options...
Ben260Z Posted March 2, 2008 Author Share Posted March 2, 2008 I dont have a map and i dont belive anyone has since this is not stock gt35r. Maybe it gets higher speed on the air out of the ,60ar and thats a good thing one a modern smaller engine that breathes better than the L engine. Iam just thinking out loud i dont know but i cant imagine its delivering any more flow. I,am going into a 3" IC so i would be better of with the ,70ar on the other side it could be interesting to try this one and see. Quote Link to comment Share on other sites More sharing options...
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