Sharpie Posted September 22, 2006 Share Posted September 22, 2006 What a great topic and a great debate Im in the middle of making my mind up as to whether to go single which lets face it if it did nothing else it really finishes off the engine bay a treat or i fit new o/e uk turbos as i like the sequential system. I too have an auto so im not looking for more hp really and again im at BPU now with a dyno'd 430bhp, ive got to go one route or the other and the cost is quite similar for me which ever way i go. Ive ruled out hybrids for my own reasons and now would love a run in a uk auto with a single on it, preferably a PHR kit using Map Ecu as thats what im thinking to fit if i went the single route. Regards Dunk Hey Dunk, You still don't have to pay Mr T prices, Turbo Technics can just rebuild your old ones http://www.turbotechnics.com/docs/turbo/exchange.htm if you don't want to go the Hybrid route. Just a thought Quote Link to comment Share on other sites More sharing options...
Pig Posted September 22, 2006 Share Posted September 22, 2006 When mine was running well recently, i was happy with it. Apart from running it at under one bar. I think that a t61 running properly at 1.4 bar would be worth the money but it must be done properly! Quote Link to comment Share on other sites More sharing options...
Stonkin Posted September 22, 2006 Author Share Posted September 22, 2006 What would the power difference be at 1.2 compared with 1.4 please guys? Quote Link to comment Share on other sites More sharing options...
Clarkey Posted September 22, 2006 Share Posted September 22, 2006 Alot! 1.4 - 1.6 is within the efficiency range of the T61. When we went for a blast - my boost gauge was reading just below 1.2 bar - perhaps 1.18 or 1.19. Quote Link to comment Share on other sites More sharing options...
Clarkey Posted September 22, 2006 Share Posted September 22, 2006 I wouldn't go bigger than a 67, it really is enough power for a shopping car It's deffo laggier than a 61 -Ian Even with the DBB Ian ? I read your write up with interest. I remember you were getting more psi of boost earlier in the rev-range. Hmm, I'll have to have search around for your report on it - as can't remember now. Quote Link to comment Share on other sites More sharing options...
Wez Posted September 22, 2006 Share Posted September 22, 2006 When we was mapping my car each .1 bar was approx 25 to 30hp more power as a very rough guideline. Quote Link to comment Share on other sites More sharing options...
Ian C Posted September 22, 2006 Share Posted September 22, 2006 It's in the Tech section somewhere. If we use 4th gear I hit 1.0bar at 3700rpm with the DBB - how does the T61 compare to that? As a very rough rule my T67 at 0.9bar felt like my old uberhybrids at 1.4 = about 480bhp. At 1.4bar it dyno'd at 630bhp. That gives 30bhp per 0.1bar, which happily coincides with what Wez has said. -Ian Quote Link to comment Share on other sites More sharing options...
stupra Posted September 22, 2006 Share Posted September 22, 2006 I'm going single very soon. I'm on an auto box, so i'm going for a t61, along with other small changes. What made my mind up for me was a ride out in Lee's (BURTS) car, it really was an awesome ride. I'm out with single upgraded cars each month, BURT t61 auto, Robace t61 auto, an Matt Harwood t67 manual, they really pull away, even from us BPU guys when everyone hits the load pedal. Defo worth the money to me. Quote Link to comment Share on other sites More sharing options...
Clarkey Posted September 22, 2006 Share Posted September 22, 2006 . If we use 4th gear I hit 1.0bar at 3700rpm with the DBB - how does the T61 compare to that? -Ian My wastegate spring is 1 bar. But as you know sometimes it can overboost perhaps 0.1 bar above that. Just had a look at my EM datalogs for a 4th gear run -wastegate boost. And if I'm reading it right & interpreting the fields correctly (please correct me if I'm wrong) - the t61 was on full boost at 3974 rpm. I'm going by the field "Relative pressure kg/cm2" - which was at 1.046. That was reading at 3974 rpm at 98% throttle. But in the logs - it also shows the "Relative pressure kg/cm2" at 1.007 @ 3603rpm - at 97% throttle. Quote Link to comment Share on other sites More sharing options...
Stonkin Posted September 22, 2006 Author Share Posted September 22, 2006 Thank you guys, this thread has been really useful to me. I'm glad Clarkey hasnt taken it the wrong way, it was purely for some techy advice as opposed to saying 'why bother wasting your money on that' It seems there is a huge difference between different boost levels then and that was what i was mainly trying to understand. In that case, Clarkey, get it sorted, and take me for another spin matey! Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 22, 2006 Share Posted September 22, 2006 Hey Dunk, You still don't have to pay Mr T prices, Turbo Technics can just rebuild your old ones http://www.turbotechnics.com/docs/turbo/exchange.htm if you don't want to go the Hybrid route. Just a thought Cheers Peter but think ive ruled out any rebuild on my old tubbies and would rather fit nice new ones, you never know with the heat cycles the turbo's go through if say the casings would fail and i dont want any doubts in my mind that ive done everything above and beyond and the money isnt really an issue and the saving isnt worth it imo. Quote Link to comment Share on other sites More sharing options...
Clarkey Posted September 22, 2006 Share Posted September 22, 2006 In that case, Clarkey, get it sorted, and take me for another spin matey! No problem Christian. Finding a police & traffic free zone seems abit of a challenge - in our neck of the woods. Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted September 22, 2006 Share Posted September 22, 2006 Personally, for me, going single was one of the best modifications on my car. It's all down to personal preference, and what you want out of the car. Quote Link to comment Share on other sites More sharing options...
JamesG Posted September 22, 2006 Share Posted September 22, 2006 Very interesting subject! I seriously considered going single a while ago. The main thing that put me off was that my supra is an automatic. I thought i'd probably end up upgrading the auto-box to cope with the power, and it still wouldn't be as controllable or as fun as a manual. My car is BPU at 1.2bar and I don't crave any more power for the moment! Instead I bought an Elise which taught me that power (and err.. reliability) isn't everything Quote Link to comment Share on other sites More sharing options...
i-macca Posted October 12, 2006 Share Posted October 12, 2006 Just been reading through some single stuff, sorry to drag this back up.. There's plenty of people with singles happy, but on the flip side, is anybody out there running a single conversion and really not happy with it?? Quote Link to comment Share on other sites More sharing options...
Homer Posted October 12, 2006 Share Posted October 12, 2006 Yes, there are a few, but I don't think they like to talk about it much! Quote Link to comment Share on other sites More sharing options...
toyotatom Posted October 12, 2006 Share Posted October 12, 2006 There's plenty of people with singles happy, but on the flip side, is anybody out there running a single conversion and really not happy with it?? Good question that. Should also bear in mind that depending on your personal disposition, choosing and waiting for an endless stream of parts to turn up, questions being discussed and finally answered, work being carried out then fine fettling afterwards, can take its tolls on your stress levels. If you dont have much hair then a single might not be for you, because you'll you probably be bald by the time its finished Quote Link to comment Share on other sites More sharing options...
Pig Posted October 12, 2006 Share Posted October 12, 2006 IMO dont do it unless your going to do it properly. e.g everything at once. Nothing should be "ok" for now. My mistake was not buying bigger injectors which meant the car was too slow. This resulted in me upping the boost too much for the 550's and its basically killed it! Oh and i have lots of lag...i dont know why. But lots of lag on an autobox without a highstall is a big no no for me. Quote Link to comment Share on other sites More sharing options...
toyotatom Posted October 12, 2006 Share Posted October 12, 2006 IMO dont do it unless your going to do it properly. e.g everything at once. Nothing should be "ok" for now. Exactly what Im getting at with my previous post. Think you summmed it up there mate. Quote Link to comment Share on other sites More sharing options...
Miguel Posted October 12, 2006 Share Posted October 12, 2006 IMO dont do it unless your going to do it properly. e.g everything at once. Nothing should be "ok" for now. My mistake was not buying bigger injectors which meant the car was too slow. This resulted in me upping the boost too much for the 550's and its basically killed it! Oh and i have lots of lag...i dont know why. But lots of lag on an autobox without a highstall is a big no no for me. How can you Kill something then have lag ? Or do you mean you had lag then killed it ? Quote Link to comment Share on other sites More sharing options...
LeeT Posted October 12, 2006 Share Posted October 12, 2006 IMO dont do it unless your going to do it properly. e.g everything at once. Nothing should be "ok" for now. My mistake was not buying bigger injectors which meant the car was too slow. This resulted in me upping the boost too much for the 550's and its basically killed it! Oh and i have lots of lag...i dont know why. But lots of lag on an autobox without a highstall is a big no no for me. I had the 72mm turbo on my autobox with no hi-stall and lag wasn't bad at all. Turning the boost up was your own doing for which you are now suffering the consequences. I managed to keep my boost down to 0.8bar for a good few months whilst i was gathering my Fuel system together. You just need to be a bit sensible if you are going to do a build step by step:tongue: Quote Link to comment Share on other sites More sharing options...
Pig Posted October 12, 2006 Share Posted October 12, 2006 Its not completly dead. I cant push it for too long though. If i do it drips oil or autobox fliud or something like that for a while and smokes like a beast! Just very bad compression results and when it last went on the RR is didnt get on full boost untill 4800RPM Quote Link to comment Share on other sites More sharing options...
Miguel Posted October 12, 2006 Share Posted October 12, 2006 Its not completly dead. I cant push it for too long though. If i do it drips oil or autobox fliud or something like that for a while and smokes like a beast! Just very bad compression results and when it last went on the RR is didnt get on full boost untill 4800RPM Gotcha.. Low comp would lead to more lag Quote Link to comment Share on other sites More sharing options...
Pig Posted October 12, 2006 Share Posted October 12, 2006 I had the 72mm turbo on my autobox with no hi-stall and lag wasn't bad at all. Turning the boost up was your own doing for which you are now suffering the consequences. I managed to keep my boost down to 0.8bar for a good few months whilst i was gathering my Fuel system together. You just need to be a bit sensible if you are going to do a build step by step:tongue: I had a problem with lag from the word go. It took forever to come online, but it wasnt just that it was the fact that from standstill it REALLY slow to pull away. I wonder if my engine was never up to it, or if there has been a problem there from the word go. Killing the engine was me turing the boost up...ill happily admit that. I will stand by there being something strange/wrong before. Lucifer drove my car and agreed it didnt seem right! Quote Link to comment Share on other sites More sharing options...
Pig Posted October 12, 2006 Share Posted October 12, 2006 Gotcha.. Low comp would lead to more lag Ahhhhhhhh, and that was prob caused by me running around with EGT's @ 900 odd, post turbo. (fucked intercooler) The problems prob started then Quote Link to comment Share on other sites More sharing options...
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