 I went to a chassis dyno today, with my race car to test a muffler |
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| ChrisFoley |
 Jul 7 2005, 08:22 PM
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I am Tangerine Racing  Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
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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. |
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| Jake Raby |
Jul 7 2005, 08:47 PM
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Engine Surgeon Group: Members Posts: 9,394 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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Posts in this topic
Racer Chris I went to a chassis dyno today Jul 7 2005, 08:22 PM
Racer Chris Power would have come up quite a bit if I had lean... Jul 7 2005, 08:24 PM TimT Chris is the stage 2 like the smart racing looki... Jul 7 2005, 08:44 PM Jake Raby This is what it should look like..... Same dyno so... Jul 7 2005, 09:00 PM Racer Chris Jake, The scales for hp and torque are different. ... Jul 7 2005, 09:06 PM Jake Raby oops Jul 7 2005, 09:06 PM Jake Raby Chris, The numbers still do not cross at 5252- som... Jul 7 2005, 09:08 PM seanery damn dude, I went and flipped it for ya and you fl... Jul 7 2005, 09:09 PM Racer Chris Jul 7 2005, 09:11 PM Racer Chris ... Jul 7 2005, 09:14 PM Jake Raby Sean,
Damn thing won't save correctly..... it ... Jul 7 2005, 09:16 PM Jake Raby I think you may be confused.. The way their graph ... Jul 7 2005, 09:21 PM Racer Chris ... Jul 7 2005, 09:38 PM Jake Raby The dip may be from tire slippage or some sort of ... Jul 7 2005, 09:49 PM Jake Raby Here's one from my dyno... trend is the same, ... Jul 7 2005, 09:57 PM McMark Chris & Jake: Here's what I see.
Torque seem... Jul 7 2005, 10:05 PM Jake Raby Yeah, I agree- The scaling is way off. It may be e... Jul 7 2005, 10:09 PM Racer Chris The real point is that the Stage II makes the same... Jul 7 2005, 10:20 PM McMark Oh yeah. http://www.914world.com/b... Jul 7 2005, 10:21 PM
Jake Raby Cool... I'd really like to try it out here in ... Jul 7 2005, 10:25 PM |
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