Ashkellybarr Posted October 23, 2019 Share Posted October 23, 2019 2 hours ago, Roman said: If you gear the supercharger for millions of boost in midrange with the plan of bleeding the air out, you'll potentially be at risk of overspeeding the supercharger by high rpm. Then from what I hear they melt the telfon linings off the rotors then things get worse from there. Also you're heating the air twice or thrice by recirculating it, which not only means hotter air at the outlet but less cooling from incoming air through the charger to keep it a little cooler I guess. I'd be more inclined to just ditch that hot air and get more through. Yeah can find the rpm specs online for them. good point about the heat though. if the charger was recirculating on it self and not causing pressure in the intake would it still create a lot of heat though? I was more thinking about lowering pressure at low rpm to help with his high comp issue...? Quote Link to comment Share on other sites More sharing options...
kpr Posted October 24, 2019 Share Posted October 24, 2019 Im with ol mate @Roman on this one. They are bad at heating the air running normal let alone overspinning and air being sent through for another go. Also the e throttle idea is basically the same as what the factory sc14 stepper motor does . Combined with the sc clutch can control when an how much boost . Not sure how much the sc clutch likes being tuned on at all the rpm, but was switching one on at 4000rpm for a short time and didnt nuke itself Quote Link to comment Share on other sites More sharing options...
Ashkellybarr Posted October 24, 2019 Share Posted October 24, 2019 Put the bypass after intercooler dont over spin, just run what he has and use the control to help with load down knock. didnt know the sc14 ran a stepper motor either Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted October 24, 2019 Author Share Posted October 24, 2019 I'm actually planning on putting my Motec m400 in and perhaps moving to e throttle for simple iac. But I'm far more keen to have the blower switched on just off cruise. And run a vaccum valve for bypass. Simple is better and usually looks better too. 1 Quote Link to comment Share on other sites More sharing options...
h4nd Posted November 3, 2019 Share Posted November 3, 2019 Gonna start a chat thread for the Lotus, so we can nag you into bringing it to the burgermeats? 1 Quote Link to comment Share on other sites More sharing options...
h4nd Posted November 3, 2019 Share Posted November 3, 2019 Also, have just jumped in here, have not read the earlier posts: Twin screw (Lysholm / IHI) etc compressors make less heat per boost, yes? My understandnig is that they snip off a packet of air at low pressure, squeeze it, the squirt that out on the high pressure side. So it's not pressing againts the high pressure the whole time it's rotataing: overall, less force x distance = less physics-work (joules) = less power (work/time) consumed per boost? Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted November 4, 2019 Author Share Posted November 4, 2019 Yeah will start a discussion thread, or feel free to make one and start nagging! Dunno about the difference between screw and normal pd blowers, but I'm reasonably committed to the sc12 since I bought the lotus and I'm now super broke haha. Quote Link to comment Share on other sites More sharing options...
Leone Posted February 17, 2023 Share Posted February 17, 2023 thread dredge here, just reading thru some old builds, i see it's been a couple of years since the TT setup was started, has there been any more progress? Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted February 18, 2023 Author Share Posted February 18, 2023 not alot of progress unfortunately, but certainly not abandoned. it spent more than a year in storage when i sold my house at the worst time in history and got stuck living at my parents. and then motivation and money has taken a heavy hit over the last year. its in my garage now and id really like to kick myself back into building the TT engine and hush the voices telling me to just buy an old single cam 18r and drive it. same store with the lotus 7 and the crown got sold for similar reasons and modern daily acquired to in an attempt to free up some time for other projects. Quote Link to comment Share on other sites More sharing options...
Leone Posted February 18, 2023 Share Posted February 18, 2023 I think you should slap an old 18r in it and drive it, very quickly you will gain an appriecation regarding the loss of power and the motivation will kick back in (unless your daily is a bit of a weapon ) Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted February 19, 2023 Author Share Posted February 19, 2023 i hate your line of thinking my daily is quite fortunately a jaguar xf that i picked up for an absolute steal. its cushy and fast and does terrible things for the motivation. 3 Quote Link to comment Share on other sites More sharing options...
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