05-14-2004, 02:03 PM
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CC Member
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Join Date: Mar 2004
Cobra Make, Engine:
Posts: 76
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There are a couple of factors at work when it comes to Dynojet numbers.
Transmission and differential are major factors. Front wheel drive (typically import) manual transaxles are at the high end of the efficiency scale, often around 10-15%. Bone stock vehicles rated at 170 hp for example will Dynojet in the 150 rwhp range. On the other end of the scale are rear wheel drive automatics and lossy differentials. A great example of this is to convert from a stick to an automatic with no other changes. I've seen it done. The customer was sick over it!  But the car performed great when all was said and done.
This gets into the other issue. Rear wheel numbers are neither a percentage nor a set amount. Officially they are "sort of both." You can hear a much more flowery version of this explanation if you call a chassis dyno company. |
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