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Dyno testing


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Done that already, running 21-22 psi now.

Will hit the dyno again in the near future.

 

Build link:

http://www.26liter.u...hp?topic=6249.0

 

Wiseco 8:1 pistons

Race prepped rods

Balance shaft eliminated

Non jet valve head, M28 (lightly ported)

Stock valves, HD springs

Schneider 274f cam

Gato Manifolds

Megasquirt 1 (modded by Mr. Scott Thompson)

T4 60-1 turbo, .58 A/R (currently testing Hx40 56mm)

ACT HD 6 puck clutch

12x29x3 fmic

Stainless 3" exhaust

Greddy Type s bov

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Awesome! Love to see that, but do enlighten me as your TPS says 60%, peak of 87%. So you're just loafing along, what would a WOT run do? Also good to see someone running the coolant temp up where it should be. Edited by scott87star
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The TPS and CLT are both suffering from noise...see how they rise/spike with RPM/boost then fall flat on decel. Think, I spoke to you about this a while back and we concluded on "grounds". When coasting or boosting, the CLT temp is between 189-198*F. The IAT also had noise but I was able cure that. Still working on others...

I took the video clip while one of shop guys spun the wheels. Not sure how he throttled it, should be WOT though, considering the faulty TPS signal. Pissed me off when he shut it down immediatly after a 4th gear pull.

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if you don't calibrate the TPS before a run like that it could show that you aren't at WOT when you really are.

I had issues with a noisy CLT and TPS signal when I ran those signal wires along with my injector wires using 20 AWG TXL wire. I have since changed the injector and sensor wires to a shielded cable and the noise disappeared. Yours really doesn't look that bad in my opinion, unless it's false triggering accel. Could also be grounding issues too, I've had plenty of that.

 

Your AFR looks great! Very clean and steady although a bit richer than needed.

 

Here's what mine looked like on the dyno last time. Check out how screwed my max/min TPS is LOL

If I don't recalibrate everytime I start the car it looks like this. But my TPS signal is good and the TPSdot looks great.

 

http://imagizer.imageshack.us/v2/640x480q90/633/sXFZ5f.png

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Its been a while since I recalibrated the TPS although I don't think it will make a differece. The noise is ground/interference for sure.

 

Those rich AFRs are robbing me a couple of ponies but I'm leaving it around low 11s until I cure the noise. Rather have it spike rich than lean on boost...as a fail safe.

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A pull from last year's dyno with clearer graph.

391whp/365tq @18-19 psi. using a restrictive 2.5" downpipe.

https://www.youtube.com/watch?v=eS6hxNbgGK8

 

 

 

393whp/366tq @18-19psi. """""""""""""""""""""""""""""""""""""""""""

both pulls uncorrected with heat soaked intercooler

https://www.youtube.com/watch?v=0bP1lhkYfOU

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Think you'll find the answer looking at the symmetry of Timing and PW. Timing advances, PW goes up. As mention before, I've screwed around with the timing and fuel on the low end to build less torque. Not looking to brake more drivetain parts.

 

You shipped the bushings yet?

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Is your AE just turning off at like 43-4500rpm in that pic? You see PW dive and AFR jump.

 

Didn't realize you were talking to me. I'm not sure what was going on at that point, it's been a while. AE shouldn't have been doing much there anyways since it was already on the floor. I'll take a look at the log

 

Edit: Just looked over that log. MAP based DE was kicking in where the PW went low and AFR spiked. This run was done on a tune that was far from perfect. That's why it's only14.5 psi on that run.

Edited by psu_Crash
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