Finally some good results (1.6L IM)
 

Finally got brad on the dyno to see what his 1.6L BEGi IM did.

It lost a little on the low-end during spool, but everything above 5.5K was an improvement. You can see the boost plots for each pull so you can see even with slightly less boost it's making a bunch more top-end.

Its running around 20-24* spark angle at 17psi which slowly drops to 16psi at redline, no matter what we couldn't cure this, he needs a new wastegate actuator.

His final numbers were 261rwhp and 221rwtq @ 16.1psi, not bad for a 1.6L with just a built block.

Setup = 2871, log manifold, 3" turbo back exhaust, BEGi IM, 70mm TB, .020" overbore, 8.8:1 CR pistons.


http://boostedmiata.com/brads/Dyno_0...e_after_IM.jpg

http://boostedmiata.com/brads/Dyno_0...Dyno%20058.JPG

Sweet! Is this roughly the same as your setup?

Mine has a larger plenum, slightly shorter runners (without the step change) and stock TB. I was hoping to run today as well and redo it, but I didn't receive a part I was waiting for.

This is the one on Brad's car: http://www.bellengineering.net/templ...e/P2045596.JPG

It's 100% fabricated, unlike mine.

For starting at less than 250whp, that is pretty good. What do you think the torque loss was due to?
Stephanie

That is freakin awesome. Steph, I need one!
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That's the before/after of the IM/TB combo. You can see it held torque a lot better than before, it only lost 20 tq from peak, compared to 60 tq from before. With a little more timing and if his wastegate could maintain the boost past 6300RPM, I'm sure he could hit closer to 280.

http://www.boostedmiata.com/brads/Dy.../brad_0606.jpg

here's the log file:

The boost pressure is forcing the flapper open just after 5500rpm. Get an adjustable wastegate and tighten it to like 13+ psi and it will hold all day long. Then he can finally push it up to like 20psi or whatever the max will be on pump.

I'm using a begi 15 psi actuator, with my hallman it holds at 16 psi all the way to red line. Did the same when I tried 19.
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