I went to a chassis dyno today, with my race car to test a muffler |
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I went to a chassis dyno today, with my race car to test a muffler |
ChrisFoley |
Jul 7 2005, 08:22 PM
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#1
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I am Tangerine Racing Group: Members Posts: 7,958 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
I wanted to measure the power loss from my new Tangerine Evo Stage II 914 silencer.
The graph below shows that the performance was identical between the Stage I and Stage II silencers, yet there is a huge difference in sound. The Stage II is very streetable. I didn't bother tuning the engine since I will have to re-tune at the Glen anyway, so in both tests the AFR was only 12 to 1. My EGTs never even reached 1200F. |
Jake Raby |
Jul 7 2005, 08:47 PM
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#2
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Damn Chris!
You have been alot with that amount of power! The "A" engine is going on the dyno tomorrow- The weather here has been horrid and really screwing up things or I would have fired it today.... The graph looks odd to me.. The actual plots go over 120 but it states max power at a lesser value... same on torque by quite a bit...wonder if something was out of cal on that machine?? I would think judging from your performance against others that you had a bit more than the dyno states... We'll see how much you lose from my dyno to theirs- my 914 lost exactly 25HP from the flywheel to the rear wheels and so did the 3.0 in the bug.. BTW- Their plots do not cross at 5,252 RPM- There is something wrong with that dyno... All dyno graphs must cross at 5,252 thats the mathmatics. You might want to ask them about that and see if they'll re do the runs for you after they cal the machine.. They should have caught that! |
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