RobSheffield Posted September 14, 2005 Share Posted September 14, 2005 the BL turbos are called 61, 67 and 71....but i keep hearing of the GT turbos (GT35, GT42 and GT47) is there any direct link between the two (as in T67 from BL is like GT42) what is the GT equivalent of the T67 from BoostLogic? is it better or worse when looking for a streetable car? looking at things from a 'lag' and ultimate boost point of view Quote Link to comment Share on other sites More sharing options...
bedlam Posted September 14, 2005 Share Posted September 14, 2005 Rob This link might help you.. http://www.moreboost.org/turbo_detail.htm#TO4R Andy Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted September 14, 2005 Author Share Posted September 14, 2005 thanks its very helpful - if a little confusing! Quote Link to comment Share on other sites More sharing options...
bedlam Posted September 14, 2005 Share Posted September 14, 2005 LOL Rob yes it is a bit of a wandering Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted September 15, 2005 Share Posted September 15, 2005 the BL turbos are called 61, 67 and 71....but i keep hearing of the GT turbos (GT35, GT42 and GT47) is there any direct link between the two (as in T67 from BL is like GT42) what is the GT equivalent of the T67 from BoostLogic? is it better or worse when looking for a streetable car? looking at things from a 'lag' and ultimate boost point of view the GT series are GARRETT Turbos. they are a more modern design turbo with quick spooling.the T series turbos are an older design a t67 and a gt42 are way different turbos. a t67 is a mid size turbo. a gt 42 is a large turbo that can give more power 700-1000hp something like a gt47 is a huge turbo they use for big power drag cars Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted September 15, 2005 Author Share Posted September 15, 2005 noticed on this thread here http://www.mkivsupra.net/vbb/showthread.php?t=47253 that Paul can get the GT30R, GT28R, and GT40. i was wondering which would most suit a manual car in a single turbo application? Quote Link to comment Share on other sites More sharing options...
Alex Posted September 15, 2005 Share Posted September 15, 2005 GT35R is close to a T61. Anything smaller wouldn't be worth it. I think the "best" street turbo would be a T67DBB Ptrim. This should out spool the stock system (ie be at full boost before the second turbo comes online) and deliver a decent punch at the top of the powerband....but equally a T61DBB larger than .68A/R would spool even faster and deliver nearly as much power. From what I've read of the specs Garrett don't make anything that's like a T67...if there is I'd like to know which one it is. Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted September 15, 2005 Author Share Posted September 15, 2005 Thanks Alex having looked at this link http://www.precisionturbo.net/turbochargers.php it looks like the GT35R or GT-37 might be close - but what i know about turbo specification could be written on a postage stamp! i mostly grasp the concept of A/R's, and compressor wheel housings etc.. what i really want is a turbo that spools fast and punches in nicely. externally wastegated (arent they all?!) giving at the wheel power around 550-650 (power is not too important - i just want it to be high enough to be worth doing!) what is the expected output of a T67 DBB P trim (with supporting mods such as Emanage, FMIC etc etc)? Quote Link to comment Share on other sites More sharing options...
Alex Posted September 15, 2005 Share Posted September 15, 2005 IanC got his non DBB T67 to 580@the wheels at 1.4bar. I've not dyno'd my T61 to compare Quote Link to comment Share on other sites More sharing options...
JohnK Posted September 15, 2005 Share Posted September 15, 2005 I always thougt the higher the A/R the more power a turbo was capable of for a given size turbo at the same pressure. So could someone explain these last 2 T61 results to me please, is what I have always thought wrong? 638 rwhp (uncorrected) by Irving R. .81 A/R, P trim @ 28 psi 625 rwhp by Travis M. .58 A/R, P trim, thrust b. @ 29 psi Both running similar boost but a big difference in A/R. Quote Link to comment Share on other sites More sharing options...
Alex Posted September 15, 2005 Share Posted September 15, 2005 As I vaguely understand it...having a .81 A/R over a .58 will give you slower spool but more power. This is due to the turbine exit being bigger. The turbine being bigger means, less restrictive = less back pressure to the engine and so it can take in a bigger gulp of fresh pressurised air thus producing more power....but the trade off is slower spool cause you've got less restricted (ergo slower) exhaust gasses down low, which can't get the thing spinning as quickly. Quote Link to comment Share on other sites More sharing options...
JohnK Posted September 15, 2005 Share Posted September 15, 2005 More or less what I thought Alex, but that doesnt explain those results, 0.23 is quite a difference in A/R is it not? Im not looking to argue, just to learn. I understand that those could just be freak results. Quote Link to comment Share on other sites More sharing options...
Alex Posted September 15, 2005 Share Posted September 15, 2005 Are you saying the gap isn't enough??? Quote Link to comment Share on other sites More sharing options...
JohnK Posted September 15, 2005 Share Posted September 15, 2005 I just dont understand the same size turbo running the same (near enough) boost but with a big A/R difference make the same power. Quote Link to comment Share on other sites More sharing options...
Dragonball Posted September 15, 2005 Share Posted September 15, 2005 noticed on this thread here http://www.mkivsupra.net/vbb/showthread.php?t=47253 that Paul can get the GT30R, GT28R, and GT40. i was wondering which would most suit a manual car in a single turbo application? Rob, Can get all the others too (just waiting on price) - but the GT35R+ is really what you are after IMHO Quote Link to comment Share on other sites More sharing options...
Alex Posted September 15, 2005 Share Posted September 15, 2005 Well true to form the one with the larger A/R does roduce more power...but I'm betting the closeness is NOT down to the turbo's. It's all down to VE and if one part of the chain from the intake to the tip of the exhaust can't deal with the increased airflow...then you might as well not have the bigger A/R. The prime candidate is the head...as it is restrictive...sooo...what I'm saying is that despite the fact you're reduced the back pressure between the exhaust valves and the turbo...it may have only made a small difference of there is still major flow issue's elsewhere such as the intake or exhaust cams. Does that help? Quote Link to comment Share on other sites More sharing options...
Alex Posted September 15, 2005 Share Posted September 15, 2005 Had another look at that Precision Turbo's site and it's the clearest explanation of Garrett Turbo's by far....the GT35R is definatle man enough and Eyefi is the one to ask about how it drives as he has one! I've got effectively a PT-61 with a 4"/2.5" (Intake/output) on a T4 flange. Which is rated at 680HP. (at what psi isn't clear). The GT35R is also rated at 680Hp... Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted September 15, 2005 Share Posted September 15, 2005 Rob, Can get all the others too (just waiting on price) - but the GT35R+ is really what you are after IMHO Based on your experience with turbo's Paul LMAO You also may want to state if all the turbos you are offering these guys are T4 flange or not! If anyone needs turbo info PM me. BTW BL are MAIN PTE distributors and have said they will beat any genuine turbo quotes into the UK. Quote Link to comment Share on other sites More sharing options...
Dragonball Posted September 15, 2005 Share Posted September 15, 2005 PMSL - Took your time there Terry - normally a lot quicker than that in interjecting! If anyone needs to look at buying turbos (which ever size they require) - please see here http://miami-gt.com/index.php/cPath/100_1_27?osCsid=3767c4292b86dd850b5c909f51faba8d Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted September 15, 2005 Share Posted September 15, 2005 So are they all T4 flanged Paul?? Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted September 15, 2005 Author Share Posted September 15, 2005 PMSL - Took your time there Terry - normally a lot quicker than that in interjecting! If anyone needs to look at buying turbos (which ever size they require) - please see here http://miami-gt.com/index.php/cPath/100_1_27?osCsid=3767c4292b86dd850b5c909f51faba8d0 not sure that link is working Boss... it bounced about for 5 minutes on my machine, trying to resize and display images - then cycled back through again.... just thought id let you know Quote Link to comment Share on other sites More sharing options...
Dragonball Posted September 15, 2005 Share Posted September 15, 2005 If you want to check out which are available Terry Flanges - http://www.precisionturbo.net/turbo-accessories.php?company_id=101795&category_id=3031 Quote Link to comment Share on other sites More sharing options...
Dragonball Posted September 15, 2005 Share Posted September 15, 2005 not sure that link is working Boss... it bounced about for 5 minutes on my machine, trying to resize and display images - then cycled back through again.... just thought id let you know Thanks Rob Rechecked and should have been http://miami-gt.com/index.php/cPath/100_1_27?osCsid=3767c4292b86dd850b5c909f51faba8d Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted September 15, 2005 Share Posted September 15, 2005 I know exactly what they are Paul but do you? Are you sure what you are trying to pedal are suitable for Supra kits? Quote Link to comment Share on other sites More sharing options...
Dragonball Posted September 15, 2005 Share Posted September 15, 2005 I will ensure that all kits are suitable for Supra owners before supplying them - but thank you for your concern! Thanks for the sales plug Also - they come direct within a couple of days of ordering flown in direct to your door with whichever accessories may be required No wait - no fuss Quote Link to comment Share on other sites More sharing options...
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