EFR6258, 1884cc BP6D, 415whp/343wtq
Hello feline friends, I have come to share the results of my build. :likecat:
Block:
CA91 pull was 16.4psi on initial spool-up, 17.8psi by redline. Open loop boost control still needs a little work, did not want to do repeated pulls just to nail in +/- 1psi here and there when I knew it would need to be tweaked for street loads (vs. Dynojet loads) anyways. May switch to closed loop although I don't feel like I'm missing out on much transient response yet. Once I learn how to read flight plans and use my radar for low visibility conditions at low altitudes, I can work on it. E85 pull was 20psi at initial spoolup, 21psi by redline. Again, an issue of just needing a bit more tuning, the boost control has been amazing with the dual port IWGA. Only disappointment for the day was that VVT was not coming on until 3400-3500, so I don't know what I was missing in spoolup before then. Maybe between the 0 shims pump, turbo feed off the VVT line, and 5w30, just not enough pressure until that RPM. I plan on going to a 10w40 and seeing if the spool-up curve improves at all below 3500, but I feel 200wtq @ 3100 isn't going to get a whole lot better. Testing will tell. The car is STUPID fast, 300wtq @ 3800 is ridiculous. I wanted a very fast spooling setup and a fat torque curve in the stock rev range, and I got what I wanted. I plan on running it at the 330-350whp level just so I can be a little more confident in my 6-speed, and because my old weathered 225 NT01's don't hook up until 4th gear at full power anyways. Boost-By-TPS% has made it very drivable, especially with the Skunk2 TB being larger in diameter over stock. And for all you Dynojet skeptics, Sav said my numbers pass his dyno BS test and actually closely resemble his Dyapack numbers as far as torque:kpa. So take that! Hit me with any questions, comments, or concerns. Here's my standard goofy video with dyno pulls and driving for the first time, as well as some more dyno comparisons. Little Car, Big Numbers. The VVT Turbo Miata Hits The Dyno! (Rebirth Ep45 ? Finale) ? The Car Passion Channel http://i63.tinypic.com/2qm1yec.jpg |
:likecat:
1) you'll want closed loop boost when the weather/temp causes your boost to swing pretty hard. though with a built engine and e85 it probably won't matter much. no reason not to use it though, you certainly have a capable ecu for it. 2) plot looks fine for that setup. don't think it will make much more though. 3) you can probably pick up a little more lowend with earlier vvt advance, but I don't think it will be drastic. really weird problem though. so you're triggering it much earlier but it only hits target much later? |
Originally Posted by 18psi
(Post 1458613)
:likecat:
1) you'll want closed loop boost when the weather/temp causes your boost to swing pretty hard. though with a built engine and e85 it probably won't matter much. no reason not to use it though, you certainly have a capable ecu for it. 2) plot looks fine for that setup. don't think it will make much more though. 3) you can probably pick up a little more lowend with earlier vvt advance, but I don't think it will be drastic. really weird problem though. so you're triggering it much earlier but it only hits target much later? 2) Can't argue that, I can't really see wanting any more, at least until I have a BMW trans in it. 3) Yes, it's at full DC and VVT angle remains 0 relative until 3400ish, despite commanding higher values. |
Gawt dang man. Beautiful setup and some fantastic numbers. Going to watch some youtube videos now.
What are the plans for the car? Just a fun streetcar or will it be seeing track time? If you wouldn't mind sharing your E85 timing map I'd love to take a look at it. |
Originally Posted by pdexta
(Post 1458617)
Gawt dang man. Beautiful setup and some fantastic numbers. Going to watch some youtube videos now.
What are the plans for the car? Just a fun streetcar or will it be seeing track time? If you wouldn't mind sharing your E85 timing map I'd love to take a look at it. |
Looks like fun, nice to see you driving a Miata again.
:bigtu: |
awesome numbers!
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Originally Posted by 18psi
(Post 1458613)
3) you can probably pick up a little more lowend with earlier vvt advance, but I don't think it will be drastic. really weird problem though. so you're triggering it much earlier but it only hits target much later?
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Data point of one here, but I was having problems with my VVT tune that turned out to be caused by calibrating the min/max duty before my oil had really got up to temp. It would work at startup, then drift away as I drove & the oil viscosity changed. Recalibrating min/max after a spirited drive fixed it.
https://cimg0.ibsrv.net/gimg/www.mia...c656a6ad18.png |
Originally Posted by wackbards
(Post 1458727)
Data point of one here, but I was having problems with my VVT tune that turned out to be caused by calibrating the min/max duty before my oil had really got up to temp. It would work at startup, then drift away as I drove & the oil viscosity changed. Recalibrating min/max after a spirited drive fixed it.
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Originally Posted by Braineack
(Post 1458721)
you can target it at 100rpm, but it's only going to move when it has the OP to move. I believe early vvt tuners were having issues trying to advance too early when there was insufficient oil pressure and it was causing a herky-jerky affect. (see hustler's old thread)
I'd check min/max angle settings and then oil pressure and solenoid |
Originally Posted by 18psi
(Post 1458757)
I don't need to see hustlers old thread. I had exactly the same issue and we were troubleshooting it together ;)
I'd check min/max angle settings and then oil pressure and solenoid |
It's certainly possible, though IMO not very likely. The normal way basically draws it from the same actuator, just earlier in the plumbing right when it comes from block. You can easily test this with a cheapie feed line and Tee from the normal location. I doubt that's it though
You got a picture of your current setup? I'm too old for facebook or wherever else you house your pics |
Originally Posted by 18psi
(Post 1458759)
It's certainly possible, though IMO not very likely. The normal way basically draws it from the same actuator, just earlier in the plumbing right when it comes from block. You can easily test this with a cheapie feed line and Tee from the normal location. I doubt that's it though
You got a picture of your current setup? I'm too old for facebook or wherever else you house your pics |
yeah how you have the oil line plumbed. if I understand your description, you tee'd a line off the vvt line right?
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On my STOCK VVT (not added afterwards) car, the oil feed and oil pressure guage pulls off of the same feed as the turbo oil feed. Just for a data point.
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Good stuff man. I still remember when we were commenting back and forth on one of my youtube videos about the EFR. Glad it worked out for you. Having all that power early is what EFR life is all about.
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Originally Posted by 18psi
(Post 1458770)
yeah how you have the oil line plumbed. if I understand your description, you tee'd a line off the vvt line right?
http://i66.tinypic.com/vqnuyq.png |
Using 5w 30 I'm surprised the damn thing moves at all. Are you shopping for oil in the ladies department of the auto parts store?
I really think that making 400 horsepower on 5 hw30 is rather cavalier, too. You're putting a lot of faith in some really thin film strength. |
Originally Posted by 1993z32
(Post 1458781)
A 1.6L OPS lives in the open hole now.
[img]http://i66.tinypic.com/vqnuyq.png[img] |
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