JustinOlson Posted August 31, 2006 Share Posted August 31, 2006 Has anyone tried one of these turbos on a l28? I'd be very interested in seeing how they respond. Regards, Justin Quote Link to comment Share on other sites More sharing options...
SR240Z Posted September 1, 2006 Share Posted September 1, 2006 the gt3071r comes with t25 exhaust housing but you can get the option from garrett to make it a T3. We are running the 3076r with .82 a/r on our sr20det car and its amazing. Full boost at about 4500 (26psi) and just screams like hell. Quote Link to comment Share on other sites More sharing options...
JustinOlson Posted September 1, 2006 Author Share Posted September 1, 2006 The turbo I'm looking at running is the 3071R with a .78 a/r divided turbine housing: Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted September 1, 2006 Share Posted September 1, 2006 One of the biggest advantages from a track car's perspective in the GT range is the high-nickel context exhaust housing. This stops the housing warping/expanding/going off. A mate needed a fresh housing every 2 meets on his old T4 but has run his GT35R for 3 seasons with no changes. I would be careful about changing the housing to one made by someone else. I suppose you would need to justify the gains from having a split pulse housing (and manifold) against the potential for turbine housing problems (if its going to be raced). Dave Dave Quote Link to comment Share on other sites More sharing options...
JustinOlson Posted September 1, 2006 Author Share Posted September 1, 2006 The housing above is actually just a machined GT32 turbine housing fitted to a gt3071r. Here is a picture and link to garretts info on the gt32: http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT32/GT3267_452234_2.htm Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted September 1, 2006 Share Posted September 1, 2006 I don't really see how that can be the case. The GT30 wheel is 60mm with a trim of 84 (making the exducer around 65mm), while the GT32 wheel is 64mm with a trim of 73 (making the exducer around 75mm). How can a bigger housing be used on a smaller wheel? Or maybe I've got the trim calculations mucked up. Dave Quote Link to comment Share on other sites More sharing options...
JustinOlson Posted September 1, 2006 Author Share Posted September 1, 2006 I've just heard they take the unmachined versions straight from garret and machine them for the gt30+ turbine wheels. Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted September 2, 2006 Share Posted September 2, 2006 That'd do it. I wonder what that would do to the spool characteristics as it is likely the GT32 turbine housing is physically bigger than the GT30 one. Dave Quote Link to comment Share on other sites More sharing options...
JustinOlson Posted September 2, 2006 Author Share Posted September 2, 2006 They make great power and if the divided manifold is setup correctly, the turbo will spool 1000 rpms sooner vs a non divided manifold setup. The highest powered stock block honda D16 is running one of these GT3071R divided turbos. Has some boost creep on the topend by the looks of it to me. Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted September 2, 2006 Share Posted September 2, 2006 1000rpm? Got any evidence of that? Sounds like far too much to me. Depends far too much on the size of the turbo, the size of the turbine, etc etc. Dave Quote Link to comment Share on other sites More sharing options...
JustinOlson Posted September 2, 2006 Author Share Posted September 2, 2006 Its just a numbe I've been have heard alot by some big honda guys that aren't bullshiters. Justin Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted September 3, 2006 Share Posted September 3, 2006 Right. Believe it when I see it. (Honda guys that aren't bullshitters AND 1000rpm lower boost threshold). Dave Quote Link to comment Share on other sites More sharing options...
Clifton Posted September 3, 2006 Share Posted September 3, 2006 Right. Believe it when I see it. (Honda guys that aren't bullshitters AND 1000rpm lower boost threshold). Dave I'm with you. I would believ 100 rpms. Although not GT turbo, I run a .70 divided, alot of guys with the same motor run a .68 undivided. Are spool times are nearly identical. On my car, going from an O to P trim is only a 600 rpm difference. Quote Link to comment Share on other sites More sharing options...
abes Posted February 13, 2008 Share Posted February 13, 2008 I know this is an old thread but I'm curious if any one is running or has run a gt30 in an l28. I'm trying to decide on a turbo for my "mean time" project and I think that a gt30 sounds pretty good. I have a brand new gt35 that I was going to run in my rb25 sitting at home but I think it's a tad too big for what I'm looking for. I had a t3/t4 stage2 on my old l28 few years ago and that thing was all over the place. It put down about 320 to the rear at 18lbs. with all bolt ons. I'd like to have a similar set up, but with more power. I just bought an '83 turbo from an old friend of mine with a t04e and some other goodies for a really good price, but from what I can remember it was really laggy. So, I thought that I can get rid of the '80s technology and move to something more advanced (gt series or similar). Let me know what you guys think... Thanks.... Quote Link to comment Share on other sites More sharing options...
Clifton Posted February 13, 2008 Share Posted February 13, 2008 IMO a GT30 is too small. I run a Precision Turbo PT 61, GT35R compressor wheel with a P trim hotside on an L28 now and wouldn't think of going smaller. The Garrett GT35R uses a smaller turbine side than I have so should spool even faster. A GT35R will also make more power than a GT30R just with the larger turbine wheel. If you want more power you need to go bigger. You can be in the efficiency range on the compressor side but kill your HP on the hot side. Quote Link to comment Share on other sites More sharing options...
Nizm0Zed Posted February 17, 2008 Share Posted February 17, 2008 so then, still on topic, but a little bit off, how would a GT3271 go? Just picked one up for $50 in excellent condition, its going on a L28. From what ive seen of the compressor maps, she should be pretty well sized? http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT32/GT3271_452203_1.htm Quote Link to comment Share on other sites More sharing options...
Clifton Posted February 17, 2008 Share Posted February 17, 2008 so then, still on topic, but a little bit off, how would a GT3271 go? Just picked one up for $50 in excellent condition, its going on a L28. From what ive seen of the compressor maps, she should be pretty well sized? http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT32/GT3271_452203_1.htm The stock T3 flows around 32lbs. I guess it would do well at lower boost. Garrett recommends it for 2.0-2.7l engines. Quote Link to comment Share on other sites More sharing options...
abes Posted February 17, 2008 Share Posted February 17, 2008 Hey Clifton, would you happen to have any pics of your set up on the l28? Quote Link to comment Share on other sites More sharing options...
Clifton Posted February 17, 2008 Share Posted February 17, 2008 Hey Clifton, would you happen to have any pics of your set up on the l28? I took this yesterday, it's back in now. T4 flanged welded to the manifold and another loose T4 flange for a spacer. Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted February 18, 2008 Share Posted February 18, 2008 MMmm ceramic. Do you think it's possible to redrill the stock manifold for a T4 flange? Mario Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.