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Old 10-05-2007, 09:04 AM   #1
Duner is offline
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Way back in the beginning of the UltraPower discussion, I recall Mike B stating that a stock 8.1L on the dyno will have the exhaust manifold glowing red. Seems to me that this is why the plug wires tend to burn up on these engines.

Here's my questions open for discussion:
1) How much, if any, will the UltraPower ECM upgrade reduce the manifold temperature?

2) Is it a case of the stock engine operating with a rich fuel mixture and too much fuel burning in the exhaust manifold?

3) If UltraPower leans out the fuel under certain load/throttle positions, shouldn't there be a noticeable deduction in manifold temperature?


I think Mike B and the Brazel's Boys should run some controlled before/after manifold temp tests on the dyno to see if there is a significant reduction in temperatures. If there is a real reduction this would be another BIG selling point for UltraPower and a benefit for the folks burning up plug wires.

My personal experience has been 2 episodes of burnt plug wires in the 1st 11,000 miles. Then I had the vent kit installed and shortly after that I installed UltraPower, Taylor wires, and CAI. I have 26,800 miles on it now with no problems. Running at 26,000 gvw, I have pulled many of the long steep grades here in the West and the combination of upgrades is working excellent for me.

I would sure like to see some dyno testing results!!!!

Happy Trails,
Duner

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Old 10-05-2007, 09:04 AM   #2
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Way back in the beginning of the UltraPower discussion, I recall Mike B stating that a stock 8.1L on the dyno will have the exhaust manifold glowing red. Seems to me that this is why the plug wires tend to burn up on these engines.

Here's my questions open for discussion:
1) How much, if any, will the UltraPower ECM upgrade reduce the manifold temperature?

2) Is it a case of the stock engine operating with a rich fuel mixture and too much fuel burning in the exhaust manifold?

3) If UltraPower leans out the fuel under certain load/throttle positions, shouldn't there be a noticeable deduction in manifold temperature?


I think Mike B and the Brazel's Boys should run some controlled before/after manifold temp tests on the dyno to see if there is a significant reduction in temperatures. If there is a real reduction this would be another BIG selling point for UltraPower and a benefit for the folks burning up plug wires.

My personal experience has been 2 episodes of burnt plug wires in the 1st 11,000 miles. Then I had the vent kit installed and shortly after that I installed UltraPower, Taylor wires, and CAI. I have 26,800 miles on it now with no problems. Running at 26,000 gvw, I have pulled many of the long steep grades here in the West and the combination of upgrades is working excellent for me.

I would sure like to see some dyno testing results!!!!

Happy Trails,
Duner

__________________
Bill (Dune'r), Helen & Missy (our toy poddle)
Last of the Chieftains, 2004 39T, W22, UltraPower, Koni's, SMI Toad Brakes
My Website:http://sites.google.com/site/billmarie2008/
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Old 10-05-2007, 11:37 AM   #3
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We have only had one coach(P32 Trek Owned by JestMe13)That still burned a wire after programming & Taylor wires.I beleive with the fuel ratio's where they need to be,the plug wire issue is 99.88% solved! We have heard of other dealer's replacing the stock wires with Taylor's and still burning them.
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Old 10-06-2007, 09:12 AM   #4
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In addition to what Mike has stated, air flow is very key to plug wire survival. The design of some front caps do not allow a lot air flow. Thus Workhorse has designed a kit to direct air to the rear 2 cylinders on each of the engine.
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