Got started on the 20psi tune last friday, dyno and video inside
07-05-2011, 08:00 AM
#1
Got started on the 20psi tune last friday, dyno and video inside So, we went back to the dyno after having not enough fuel. The fix was to switch to 160's and also sent back my pump, filters, and regulator to all be rebuilt. That seems to have done the job! Also went to the dyno with C16 this time instead of e85.
We spent the early part of the night fixing typical problems. A boost leak, a little spark blowout, and the boost controller was giving us fits. We got the car perfectly dialed in at 16psi, and were happy with the way the car was responding. At that point, we decided to step into the boost a little and moved up to 20psi. The last two pulls on the sheet are the 20psi pulls. We still have a couple *'s of timing to put into it and also are pretty conservative on the a/f. I'd guess there's a solid 75 to the tire sitting in the tune, but we were happy enough and ready to fine tune at the track. The track should push the tune into tottaly different cells in the tuning tables, so there's no real point in pushing it on the dyno. Also are running into more spark blowout at 20psi, so we'll need to close down the plugs again before we go back out again. We are still pretty happy with the results!
not much to see on the video, but what the heck, haha.
http://youtu.be/qNqPbV_9wro
We spent the early part of the night fixing typical problems. A boost leak, a little spark blowout, and the boost controller was giving us fits. We got the car perfectly dialed in at 16psi, and were happy with the way the car was responding. At that point, we decided to step into the boost a little and moved up to 20psi. The last two pulls on the sheet are the 20psi pulls. We still have a couple *'s of timing to put into it and also are pretty conservative on the a/f. I'd guess there's a solid 75 to the tire sitting in the tune, but we were happy enough and ready to fine tune at the track. The track should push the tune into tottaly different cells in the tuning tables, so there's no real point in pushing it on the dyno. Also are running into more spark blowout at 20psi, so we'll need to close down the plugs again before we go back out again. We are still pretty happy with the results!
not much to see on the video, but what the heck, haha.
http://youtu.be/qNqPbV_9wro
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07-05-2011, 09:23 AM
#10
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any plans on redoing that downpipe to be a full 5"? I wouldn't be surprised if thats not starting to cause you issues. I'm pretty sure a 5" necked to 4" caused me issues on my old 366 setup.
07-05-2011, 09:39 AM
#11
We tried to get the 5" all the way out, but couldnt get it past the K-member/a-arms. Once i get off my wallet and buy tubular, we should be able to sneak it through. I imagine we are losing something there for sure. the neck down is downstream to "try" to minimize the restriction, but I'm sure it's still there.
07-05-2011, 01:16 PM
#13
Actually, we are limited to a 76mm, but we went ahead with this turbo for now. We are building the car for Real Street 275 class. This turbo is supposed to be a really inefficient Garrett TV8513 unit, but we've been "happy" with it so far. I will say my Borg Warner S480 i had before felt a little more "hot" than this one though.
