S2000 Under The Hood S2000 Technical and Mechanical discussions.

Amuse-ing day at the dyno

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Old 06-21-2003, 08:59 PM
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jzr
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Man, talk about an old thread...

Amuse parking lot flyby

But as has been said before, sound inside the car is nothing like what it's like outside. The Amuse is loud, but not as loud as my custom-bent system using the stock resonator and a Borla XR1. Edge definitely goes to the Amuse for sound. Nothing quite like it...
Old 06-22-2003, 09:00 AM
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When I went to dyno my car, my car was making more and more HP as the car got hotter. Why is this? everyone else best run was the first run and mines was the last run on the Dynojet.


Chris C.
Old 06-22-2003, 03:41 PM
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Originally posted by SC-SUZUKA
When I went to dyno my car, my car was making more and more HP as the car got hotter. Why is this? everyone else best run was the first run and mines was the last run on the Dynojet.


Chris C.
Mine is the same way. My guess is that my cooling mods keep the car from heating up, but the oil in the engine, transmission, and differential gets thinner after each run, causing less loss. I have dyno'ed my car on 3 occasions, and my 1st run is always my worst.
Old 06-22-2003, 06:45 PM
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Originally posted by SC-SUZUKA
When I went to dyno my car, my car was making more and more HP as the car got hotter. Why is this? everyone else best run was the first run and mines was the last run on the Dynojet.


Chris C.
My car did also, no idea why.
Old 06-22-2003, 07:13 PM
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Consider intake temps as well. If the car has been sitting for a short period, intake temps go through the roof. A full throttle run will actually bring those temps down. A couple consecutive runs will bring them back down to more normal operating conditions.

Oil temps, as Gernby suggested, also play a role. We've seen changes of as much as 5-8 hp from a stone cold situation (engine temps normal, but car was not driven) all the way to fully warmed up in terms of oil temps. And you can warm up the tranny/diff oil without driving the car under some load (meaning on the road, or a load type dyno).

UL
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