texis30O Posted March 8, 2016 Share Posted March 8, 2016 Mark, I am in Austin working this week. Is there any chance I could see your build in person? Quote Link to comment Share on other sites More sharing options...
ihiryu Posted March 8, 2016 Share Posted March 8, 2016 I wanna come see it too..... Quote Link to comment Share on other sites More sharing options...
EF Ian Posted March 20, 2016 Share Posted March 20, 2016 I appreciate the advice from everyone to use a custom ECU. I have a Motec M6 in my RB26 Z (http://www.rolston.me/NewSite/Z-Blog/Z-Blog.html) and while it's arguably one of the best aftermarket ECU's, even the best programming can't match what the factory ECU can do for basic drivability. Any custom map likely suffers from cold-start, decel, part-throttle, and other tune weaknesses. I'm determined to start with the factory ECU along with the UpRev programming to see if I can have my cake and eat it too- meaning to have a nice drivable map along with the high power setup that I've built. While that can be true, all it takes is time to get the aftermarket ECU's performing like a stock in terms of driveability, with the time and money you've spent on this surely a bit more on tuning is no big deal. Map it well on the dyno and then spend couple of weekends tweaking the cold start, drive-ability and part throttle settings, make sure the conditions are different on each weekend. I feel the drive-ability on my RB26 with lnik ECU is very good, tweaked the cold start a few times and now its perfect. The schedule target is now to have the car finished and running for the Nismo Fiesta in San Antonio at the end of April. It may not be painted but I expect it will be finished otherwise. Then we can do a few months of test/tune at Harris Hill to figure out what spring rates, shock settings, etc. work best. If you recall, the entire frame and suspension of this thing is custom and therefore we have no real idea of what will work best. at it's current weight of less than 2000lbs it should be quick in any case. Will be great to see it running, good luck, make sure to keep us up to date. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted March 22, 2016 Author Share Posted March 22, 2016 It is nearly impossible in my experience to get a custom ECU programmed anywhere near a factory ECU in terms of drivability. They literally spend 1000s of hours on the tuning map. It might be technically possible to approximate it but it would take a monumental effort. In any case, it's tuned now and running great. with only spring pressure it does 430whp. We'll tune it soon with boost control for ~200+ more. 1 Quote Link to comment Share on other sites More sharing options...
ihiryu Posted March 22, 2016 Share Posted March 22, 2016 Truthfully, I think my R32 drives like stock with the EMU in it. A lot of people who have driven/ridden in it don't believe it's on standalone. However, I do have roughly 20 hours or so on tuning the stock turbo and injectors to get it just right. I get much better gas mileage than stock as well too. I think though, that it's also because it's an old car running an 8 bit ECU, and suddenly went up to three decades of technology lol. So.....about that invite to see the car? Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted April 7, 2016 Author Share Posted April 7, 2016 small update. We're down to fit and finish. I never like the way the center console fit up against the dashboard. So we are reshaping it carefully to fit better. Then both will be surfaced in CF. Quote Link to comment Share on other sites More sharing options...
Pharaohabq Posted May 7, 2016 Share Posted May 7, 2016 FIt n Finish is awesome... I almost had to move to Austin, your car was one of the draws, fortunately I got a job here, so I'll just have to see it when I make it out sometime. It's awesome to see you're so close on it. Phar Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted August 14, 2016 Author Share Posted August 14, 2016 still working on carbon parts and fit-n-finish. It's slow going. Here's a quick shot of how the rear diffuser neatly covers the rear suspension underneath. We hope to do track testing in September. I want to get this thing done this year. Quote Link to comment Share on other sites More sharing options...
EF Ian Posted August 17, 2016 Share Posted August 17, 2016 Will be great to see this thing on track, good luck, take some videos for us. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted October 29, 2016 Author Share Posted October 29, 2016 I will be doing the first track shakedown of the car this thursday (Nov 3) at Harris Hill in the AM. Also, dashboard nearly finished. looks great. maybe too shiny. 1 Quote Link to comment Share on other sites More sharing options...
ihiryu Posted November 26, 2016 Share Posted November 26, 2016 ARRRRGH I CAN'T BELIEVE I MISSED THSI Quote Link to comment Share on other sites More sharing options...
jpndave Posted November 27, 2016 Share Posted November 27, 2016 I will be doing the first track shakedown of the car this thursday (Nov 3) at Harris Hill in the AM. Also, dashboard nearly finished. looks great. maybe too shiny. Very nicely done! Quote Link to comment Share on other sites More sharing options...
seb280z Posted February 15, 2017 Share Posted February 15, 2017 Did you get to the track? I would love to see some Pictures of if in the current state, the work and detail of this car is awesome and you are a inspiration and keep me motivated for continuing building my Datsun.. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted February 18, 2017 Author Share Posted February 18, 2017 (edited) Did you get to the track? I would love to see some Pictures of if in the current state, the work and detail of this car is awesome and you are a inspiration and keep me motivated for continuing building my Datsun.. I did. I apologize for not posting but we were so caught up in testing that I didn't take many photos and completely forgot to get video. The car is insane to drive. The throttle is too sensitive and it'll spin it's wheels at the slightest tap. On the bumpy Harris Hill track the bumps cause my foot to accidentally depress the accelerator just enough to send the wheels spinning. Not good. We are adjusting the throttle map to attenuate the tip-in throttle intensity. We are moving to a smaller brake MS for tighter braking control and we're going to get some stiffer shocks. Otherwise it's a blast to drive. Next up is to finish the various CF parts and get it painted. I also need to find some better doors. These are too banged up. . Edited February 18, 2017 by markrolston@mac.com Quote Link to comment Share on other sites More sharing options...
rturbo 930 Posted February 18, 2017 Share Posted February 18, 2017 I'm surprised you didn't go with a composite door shell. Car looks good though. I like that it isn't too extreme looking, even though it is very extreme in every other way. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted February 19, 2017 Author Share Posted February 19, 2017 I'm surprised you didn't go with a composite door shell. Car looks good though. I like that it isn't too extreme looking, even though it is very extreme in every other way. composite doors are an easy way to get killed on the track without a ton of engineering in the CF structure. That's not something I can do. The car has steel where it's most needed. Quote Link to comment Share on other sites More sharing options...
EF Ian Posted February 27, 2017 Share Posted February 27, 2017 Epic build, look forward to some more photos and definitely a video hen you get a chance. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted April 24, 2017 Author Share Posted April 24, 2017 FYI. I'm bringing the car, along with my RBZ, to the San Antonio Nismo Fiesta this coming Sunday, April 30th. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted August 18, 2017 Author Share Posted August 18, 2017 small update. big news. Car went to paint a few weeks ago. Starting the process of getting painted. Quote Link to comment Share on other sites More sharing options...
tim.d Posted August 18, 2017 Share Posted August 18, 2017 (edited) I'm kind of upset you're painting it, but more glad it's still alive! Edited August 18, 2017 by tim.d Quote Link to comment Share on other sites More sharing options...
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