I was at work curiously going through random posts and whatnot, and saw this one where someone said the following:

"I owned a i/h/e B18C1 swap in my ols 1992 Civic Si hatch.

It dynoed 150whp/122ft-lbs. of torque to the wheels, but it had a really broad, flat powerband. There wasn't a big dip, then surge forward when VTEC hit like there is with the B16A/B18C5 engines because the C1 is tuned for midrange power too. It just doesn't have the top-end rpm whp that the poor man's R would (if it pulled much like an ITR engine) so don't expect it."

The post can be seeing here: https://honda-tech.com/zerothread/2359111.

K the point is that how is this possible. I will be buying this same engine next year for my EG and was always curious how bad does the hp/torque real numbers fall as the engines are used with time. How can an engine with stock 178hp can come down to 150hp. If this is true why we keep worrying about this numbers if we are not going to end up with them anyways. So if i bought a CTR engine or even ITR, wouldnt have my 200+ hp in it then?

PS: It curious that even in Gran Turismo for PS2 and PS3 this numbers also fall with the usage of the engine, but is easily fixed with an oil change.
PS2: sorry if this has been posted somewhere else but i couldnt find anything.

 

Although everything is built the same not everything produces the exact some output after it's all put together. Also, you have to factor in how the horsepower number is obtained, some use engine dynos to measure and others use wheel dynos. All ways will differ. Then you have to factor in air temp variances and such, there's a lot of factors that can give you less or more than rated power. Don't forget that parts can wear and things can be corroded or begin to develop issues that will bog down performance over time.


Oh and in Gran Turismo the more you drove the Toyota Supra the more power it would get, I think mine was over 1160something(This was more than everyone else's that I knew that had the game) and kept gaining power the more I drove it and changed the oil regularly

 

Ok first off the factory hp rating are on an engine dyno and whp are gotten on chasis dyno's.
There is a loss of power from the transmisson.
So anything measuring hp at the wheels will read lower then an engine dyno that reads off the flywheel and therefor doesn't have the frictional losses from the transmisson.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by luispizarro25 &raquo;</TD></TR><TR><TD CLASS="quote">PS: It curious that even in Gran Turismo for PS2 and PS3 this numbers also fall with the usage of the engine, but is easily fixed with an oil change.</TD></TR></TABLE>You've got to be kidding right?Your asking if GT has anything to do with real life?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fkned &raquo;</TD></TR><TR><TD CLASS="quote">You've got to be kidding right?Your asking if GT has anything to do with real life? </TD></TR></TABLE>

lol No that wasnt my point, I wasnt comparing GT with real life at all... i was stating this for ppl to know. I know this website does not have to do anything AT ALL with this game but i like it alot... Im actually learning how to drift in GT at the moment, seems pretty cool...

Anyhow, the thing is that for the longest time I have been wondering about the hp and torque rating of cars. Im taking engineerig classes at the university and this one mechanical class i was in they talked about engines and how their power is rated and how they loose power as their parts get older and worn out. So then i thought about my car and the engine i will buy in the future.

Sorry for the misunderstanding...

 

Engines gradually lose some compression over time (rings mostly, but valve seats too), usually not enough to cause any real issues beyond a slight drop in power.