07-29-2022, 03:18 PM | #1191 | |
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Do you know the compression of your engine? |
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07-29-2022, 03:18 PM | #1192 | |
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Do you know the compression of your engine? Have any acceleration videos like a 2nd gear pull from low RPM to high RPM? |
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07-29-2022, 03:30 PM | #1193 |
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I'm a little surprised looking at the top two graphs, 1. That yours isn't a little higher, I had heard of others dynoing (dynojet) in the two hundred-teens-ish. and also that the BRZ was that high on 91. Anyway, I understand that it isn't a direct comparison.
Here is an overlay, look at the increase in the 5-6k range when you're pulling out of a corner.
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07-29-2022, 03:44 PM | #1194 | ||
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I haven't made any, but my AIM Solo runs whenever the car is driving so I'll see what I can pull off it tonight. The K24 car has lead to me being somewhat disappointed when I drive my full bolt on FA20 daily driver, unfortunately. The K24 throttle response, huge midrange, eager/playfullness of revs, pulling all the way to the limiter, etc are all blinding when I drive the two. Quote:
I'd hazard a guess that the calibration and smoothing play a factor in your points there... there is one other K24 BRZ that I know of that has been on a NASA classing dyno. Nick from the facebook group, looks pretty close to mine: 205/175
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07-29-2022, 04:44 PM | #1195 | |
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07-29-2022, 04:58 PM | #1196 |
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Have you had it on track yet? I'd love to see some before and after swap data
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07-29-2022, 09:48 PM | #1197 |
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That's really healthy! Sounds like either you have leaking valve guide seals or control rings, but either way it's no big deal. I eat about 1 quart of oil per 750 miles on mine; pretty excessive! We did a cylinder leak down test and it showed I have leaking valve guide seals on every cylinder lmao. So I have a 4Piston head on the way. Just gonna swap it onto my stock block with a set of Todo D cams and call it a day until the bottom end goes.
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07-29-2022, 09:53 PM | #1198 | ||
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I'm really curious to see how yours does with the Todas/head, the way the torque falls off above 5200ish on these seems to say it all. I went out to test the oil temp stuff, here is a 1-2 pull and then a full 3rd gear pull for you. Shielding the two DBW signal wires on the engine harness side didn't fix the issue, for what it is worth. I have shielded jumper harness wires for those two also, but I'm not real optimistic.
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07-30-2022, 01:39 PM | #1199 | |
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We have very similar acceleration. I seem to be a little quicker, but I'm also on E85 with 4.33s so I would hope I am! This is rather disappointing. I am still fighting this issue and while being a daily driver it's not that big of a deal, it still annoys the heck out of me. Please keep us posted on any further updates. |
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07-30-2022, 10:07 PM | #1200 | ||
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I was reading a bit today and saw this article from Haltech:
https://www.haltech.com/news-events/...dos-and-donts/ and this post on HPAcademy, specifically the one by Chris250 https://www.hpacademy.com/forum/gene...round-question Two sections stood out to me: Quote:
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Sooo, I unplugged the ECU and found that the sensor ground still had continuity. Started pulling grounds and found that the sensor ground wire was being grounded through the two eye rings on the valve cover. I plugged the ECU back in without those two eye rings grounded and the ECU wouldn't turn on. When I grounded either of the two valve cover eye rings and the ECU powered on. Seems like progress is being made, I guess.
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07-30-2022, 11:25 PM | #1201 | |
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07-31-2022, 01:01 AM | #1202 |
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It might resolve some issues, but I'm going to put the ball back in KPower's court. I spent the last three hours pulling the Haltech, adapter board, engine harness and checking continuity everywhere.
Ends up that the engine harness shares ground for every thing on it from sensors to coils to ECU, rather than having a separate sensor ground. Easiest way to check to see if your harness has this issue is to unplug the AC1 plug, unbolt the two ring connectors from the valve cover, stick an ohm meter on one, and stick an ohm meter into one of the sensor grounds like the oil pressure/temp sensor. If there is continuity then there is shared ground between sensors and everything else. Now you can all quit listening to me talk like a crack smoker about oil temps. I'm assuming this has also been affecting crank position sensors, cam position sensors, etc since they also share the ground.
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07-31-2022, 02:05 AM | #1203 |
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Wanted to share this anomaly that I'm now wondering if it's related to the interference issues that RedReplicant is posting about..
Fresh oil change with 5w30 and a can of "engine restore" compression fix additive. Fire the car up, drive it halfway down the block, car starts misfire and loses tons of power and idles real low. I drive it around the block back home, plug in my laptop and see this code which mind you shows as "Past" and not an active code: As the car is idling (erratic and low), it starts slowly getting better and better as if it is re-calibrating itself. Within a few minutes the car runs normal again: great idle, smooth and full power. Hasn't done it since, it's been about 700 miles. Any ideas? |
07-31-2022, 03:25 AM | #1204 | |
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Always looking to tinker with something..
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