keebs Posted April 24, 2015 Author Report Share Posted April 24, 2015 Meanwhile in the temple of doom... My turbo manifold is almost finished. Quote Link to comment Share on other sites More sharing options...
Bean Posted April 24, 2015 Report Share Posted April 24, 2015 Holy crap man - that's some serious business right there! What turbo are you running? Rabin Quote Link to comment Share on other sites More sharing options...
keebs Posted April 24, 2015 Author Report Share Posted April 24, 2015 Borg Warner s250sx with a .75 divided turbine housing. Quote Link to comment Share on other sites More sharing options...
my3AWDgst Posted April 25, 2015 Report Share Posted April 25, 2015 That's looking lovely and I love Tial products :-) I have them on my DSMs as well. Have you thought about running Precision turbos? Quote Link to comment Share on other sites More sharing options...
keebs Posted April 25, 2015 Author Report Share Posted April 25, 2015 Thanks, gotta love Tial. Didn't even consider Precision turbo, had a bad experience with them. Quote Link to comment Share on other sites More sharing options...
Stewart Posted April 25, 2015 Report Share Posted April 25, 2015 Evil hand wringing and deep throaty laughter from The Temple of Doom! I can hear it in Australia. I keep telling my colleagues, "I am not crazy, this is serious stuff to a 505 driver". Two questions to start, Keebs. 1/ Will this use the Dani cam? 2/ Would you have an equivalent Garrett for me to run the Dynosim for you? Yippee! Quote Link to comment Share on other sites More sharing options...
Bean Posted April 25, 2015 Report Share Posted April 25, 2015 I had never looked at any other turbos from BW aside from the EFR line, but damn those SX turbos spec out really nicely, and lots of good reviews. Love that it's a journal bearing (rebuildable), smallish, twin scroll, and pretty darn affordable! I'm gonna have to spend more time looking at that series. Rabin Quote Link to comment Share on other sites More sharing options...
keebs Posted April 26, 2015 Author Report Share Posted April 26, 2015 For the time being it still has the standard cam installed, dani cam might go in later. A garrett comparison would be between a gt28rs and gtx3067 based on flow alone. The only thing I like about the EFR turbos are the compressors. Sure you might save a buck if your system is built around it, but then you're stuck with it and things marked "engineered for racing" usually mean finite lifespan. Quote Link to comment Share on other sites More sharing options...
Stewart Posted April 26, 2015 Report Share Posted April 26, 2015 Ok. 1/ Static compression ratio? 2/ Wastegate setting? 3/ Yippee! Quote Link to comment Share on other sites More sharing options...
keebs Posted April 26, 2015 Author Report Share Posted April 26, 2015 1) 7.5:1 2) 7psi base pressure, 12psi with ebc Quote Link to comment Share on other sites More sharing options...
Stewart Posted April 27, 2015 Report Share Posted April 27, 2015 Keebs, Oh Mighty Emperor of Doom! The figures from the Dynosim prediction. Air temp at 75 F and altitude 500ft. In the table the boost can be seen in the Int Man Pressure ( inlet manifold pressure) beginning at 1500. I'll have play with static comp ratio and cam timing then try the set up with the Dani profile. Have you sorted an adequate intercooler? Quote Link to comment Share on other sites More sharing options...
keebs Posted April 27, 2015 Author Report Share Posted April 27, 2015 Hopefully it will make more power with less boost. I'll post an old fuel/ignition map alongside the new one for comparisons sake. Quote Link to comment Share on other sites More sharing options...
Stewart Posted April 28, 2015 Report Share Posted April 28, 2015 Great . We can enter a close ignition graph for a better prediction. By the way, your TIG welding almost looks superb! Take a better photo next time, mate! Quote Link to comment Share on other sites More sharing options...
Stewart Posted April 28, 2015 Report Share Posted April 28, 2015 Here is the same set up with an increase in compression to 8.5 and the cam advanced 4 crank degrees. There is a slight increase in BMEP which might be worth considering during the build up. Quote Link to comment Share on other sites More sharing options...
keebs Posted April 28, 2015 Author Report Share Posted April 28, 2015 Can't take credit for the welds. It's being made by a local fab shop called Tempest Racing. If the car comes back tomorrow I'll post some better pics. 8.5:1 is probably the limit compression wise unless the chamber can be modified for a faster burn. Quote Link to comment Share on other sites More sharing options...
Stewart Posted April 29, 2015 Report Share Posted April 29, 2015 OK. Could you check the sizes of turbine, compressor and A/R specs on your turbo, so I might get close to the basic set up to run for us please? Quote Link to comment Share on other sites More sharing options...
keebs Posted April 29, 2015 Author Report Share Posted April 29, 2015 Compressor-49.5mmx69.5mm Turbine-69.5mmx61.5mm Comp housing A/R-? Turbine housing A/R-.75 divided Quote Link to comment Share on other sites More sharing options...
Stewart Posted April 29, 2015 Report Share Posted April 29, 2015 That should do us! It's looking good. 200 ft lb at 2500rpm. I'll play around with intercooler sizing if you agree on the output prediction. Graph 1 is at 7.5, graph 2 at 8.5 on standard cam timing and small intercooler. Should get a nice whistle along, Oh Mighty One! Quote Link to comment Share on other sites More sharing options...
keebs Posted April 30, 2015 Author Report Share Posted April 30, 2015 Just a few shots. Quote Link to comment Share on other sites More sharing options...
Bean Posted April 30, 2015 Report Share Posted April 30, 2015 Wow. Attention to detail and byild quality look exceptional. Out of curiousity - what was your thoughts/experience on one piece flange vs segmented flanges for each port to account for expansion? And was there any consideration for a support bracket for the turbo to take some weight off the manifold bolts? Just curious - Again just looking for validation on different methods Ive seen. Rabin Quote Link to comment Share on other sites More sharing options...
keebs Posted April 30, 2015 Author Report Share Posted April 30, 2015 Stewart, I should be up and running in a day or two to give some feedback. Rabin, I see no difference between a solid flange and a segmented one. Segmented would be useful for weight savings, or if you basically needed to assemble during install with slip connectors due to cramped spaces. A solid flange would dissipate more heat than segmented, so possibly less chance of warping. It's really a toss up. If you're making the flange at home on a drill press segmented would be better since a mistake wouldnt cost a whole flange. I wouldn't brace a turbo manifold unless it was stupid heavy. Think about thermodynamics and metal expansion rates. You have a 800-950c manifold at fairly uniform temps and expansion, then you have a rigid stick bolted to it that wont let the material do what it wants through heat cycles. A better solution would be a harmonic isolation bushing thats a mild durometer that doesn't impart an outside stress just absorbs vibration. Quote Link to comment Share on other sites More sharing options...
Stewart Posted April 30, 2015 Report Share Posted April 30, 2015 Gulp! Good work sir. I look forward to some data. How does one tune A/F in a Temple of Doom? Quote Link to comment Share on other sites More sharing options...
keebs Posted May 1, 2015 Author Report Share Posted May 1, 2015 Now that's a complex question. Easy way is a dyno, the other way is trial and error. Use your best guess as to what feels faster that's about it. Got the car running today, but forgot to snap a shot of the previous map. Only tuned to .5 bar, had to add 5% more fuel in the cruising range and 2-3% up top. Egt was lower so took some timing out. Overall it runs, doesn't leak, and the turbo makes it sound like a truck. I'm happy with it. Quote Link to comment Share on other sites More sharing options...
my3AWDgst Posted May 1, 2015 Report Share Posted May 1, 2015 Thanks, gotta love Tial. Didn't even consider Precision turbo, had a bad experience with them. Interesting... From our experience HP and track numbers have improved with Precision units and most of them are smaller unit compared to Garret units. Cool build I'm glad someone is doing something good with 505's. Quote Link to comment Share on other sites More sharing options...
Bean Posted May 1, 2015 Report Share Posted May 1, 2015 EXTREMELY interested in how fast it spools up once you get it dialed in... Btw - with respect to the bracket I was thinking direct support of the turbo instead of to the manifold. No idea how heavy the assembly was, but turbo is a bit father out so curious of it crossed your mind. Oh - and install pictures would be awesome to see how a top mount turbo looks in the engine bay. Rabin Quote Link to comment Share on other sites More sharing options...
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