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View Full Version : advice on measuring horsepower for complaint



Mark F
05-22-2002, 12:29 PM
Originally posted by krispykeith:
Hello all. Quick summary, new spec delivered with defective engine. They refused replacement vehicle, instead ordered a new engine....and I have been driving for a few weeks since it was replaced. BBB not much help. Here is the deal: I have noticed a detectable reduction in my power, especially in the low gears. When I first drove the spec, it really took off in 1st and 2nd.....but since the engine was replaced it drives fine but feels less powerful. Even my stated "it feels alot less peppy".

Long story short, Nissan North America is sending a representative to the local dealership to meet with me and inspect my car next Thursday. I fully expect they will say "there is nothing wrong with it". I know better. Is there any way to measure horsepower or similar type of reading that I could point to and say "no no, this is acceptable.....and this is what mine is." Someone at work talked about a dyno, but to be honest....I am not familiar with the term. Ideas....I want to be as prepared as possible and am more than willing to spend some money beforehand to have something to back up my argument. I highly doubt the dealership will have another one there for comparison. Thank you!<font size="2" face="Verdana, Arial[/img]Playing devils advocate for a moment; is it possible your original engine was a little too peppy, hence its premature demise? You really ought to try driving another one for side-by-side comparison.

I suppose you could have your car dynoed, but that won't necessarily mean anything since I presume you didn't dyno the original motor.

**DONOTDELETE**
05-22-2002, 12:57 PM
I am not sure if it was "too peppy" or not....but it had excessive piston slap the second it was handed over to me. I hope to find another one that I can drive for comparison....but they just arent around. I did do a test drive before ever purchasing, and from what I remember it too felt much stronger in the low gears than the replacement engine does. I have no idea what would cause a reduction in torque or power, so I really dont know how this meeting will go.

**DONOTDELETE**
05-22-2002, 01:21 PM
Your best bet is what your friend told you and that is to go get the cars output measured on a dynomometer. You can easily compare to others dynos that are on this site and if it is significantly lower then atleast you have something and not the impression of the "inspector".
Good luck.

**DONOTDELETE**
05-22-2002, 01:34 PM
Look in the yellow pages under race shops, or performance shops or automobiles - racing.

You'll find the heading with a long list of performance engine rebuilders, chassis specialists etc. Some of them will have a chassis dyno.

Call them up, price them out and go for a dyno run. This will get you your readout and you can compare it others.

**DONOTDELETE**
05-22-2002, 07:29 PM
Thanks so much guys....this is exactly the info I was looking for. I see another thread discossing dyno's, so hopefully some people will post their results so there will be a nice base range.

I will check the yellow pages right now!

**DONOTDELETE**
05-22-2002, 11:43 PM
Hello all. Quick summary, new spec delivered with defective engine. They refused replacement vehicle, instead ordered a new engine....and I have been driving for a few weeks since it was replaced. BBB not much help. Here is the deal: I have noticed a detectable reduction in my power, especially in the low gears. When I first drove the spec, it really took off in 1st and 2nd.....but since the engine was replaced it drives fine but feels less powerful. Even my stated "it feels alot less peppy".

Long story short, Nissan North America is sending a representative to the local dealership to meet with me and inspect my car next Thursday. I fully expect they will say "there is nothing wrong with it". I know better. Is there any way to measure horsepower or similar type of reading that I could point to and say "no no, this is acceptable.....and this is what mine is." Someone at work talked about a dyno, but to be honest....I am not familiar with the term. Ideas....I want to be as prepared as possible and am more than willing to spend some money beforehand to have something to back up my argument. I highly doubt the dealership will have another one there for comparison. Thank you!