SR motors making less than stock??

[The Mic]

some guy said that s13 sr motors tend to make < 200hp due to engine wear? this true?

[IvoryJ30t]

its a junkyard motor. just because it came from the factory with a given power level doesnt mean it makes that horsepower when you get it. unless its got super-low mileage, or its freshly rebuilt, its definately going to make less horsepower [if its stock] than it was born with.

[The Mic]

yeah i know that , im just wondering like would the wear drastically lower the hp like to 170hp?

[IvoryJ30t]

depends on the condition. you cant generalise it, too many factors.

if your gonna mod it, it doesnt make a difference anyway.

and let me clear this up - ALL motors make less than rated power due to age and wear.

[IvoryJ30t]

its not like its a specific problem with an s13 sr motor. that happens to every motor with age and mileage.

[dareo]

Some motors will increase slightly im power with some age, a perfectly broken in motor that was very well cared for shouldnt lose power. Unless you have eleventy billion miles on it

[IvoryJ30t]

well, specifically the motor is at its peak at 10-20 k miles. after that its down hill.

power starts off, increases, then slowly decreases.

a motor with 70,000 miles does not have the same power it did at 15,000 miles

[dareo]

Yeah its pretty much the engine breaking in....then its fully broken in and making its best power....then it starts to wear out and make less power. but its not like your dropping hp every time you change your oil.

[IvoryJ30t]

no, im not saying its a drastic change. you probably wouldnt even notice unless you kept consistant dyno readings.

[IvoryJ30t]

probably like a 20 hp change from 15,000 to 70,000

[Onizuka]

A pristine 15,000mile perfectly taken care of s13 SR20 wont make more than 180 at the wheels. Its a simple matter of drivetrain loss.

As far as them being junkyard motors, thats what you buy for $1500 on ebay. Expensive motors were pulled from running vehicles bought in auctions that were parted.

Unless some essential part (like the turbo) has taken a crap or it has been neglected, the motor will produce just about the same power figures its whole life. If it were as simple as -20hp/55,000 miles there would be a ton of little hondas running around with 300,000 miles and -15hp.

[yellow_jacket]

My almost stock(I only have a 3" exhaust) Red top is putting 190 to the wheels.

[GTS4-R]

it depends on mods, and less figure that u loose about 15% of your HP from your flywheel to your wheels. So that 1170 out of a stock sr sounds about right (AT THE WHEELS). Now most of the motors we get over here have from 30,000-60,000 miles on them. To me thats a motors prime as long as it has been taken proper care of (oil changes, no overheating, etc etc.) A motor with 40,000 miles on it will make just as much, if not, more power than a motor with 0 miles on it for the most part. But the transmission and diff. will eat up HP and thats probably what your talking about

[Hijacker]

your only problem with the low mileage motors we can get is that they've been sitting around a long time. Redtops haven't been produced since.....94? A friend of mine just finished installing a red top into his friend's S14, and the engine was sputtering oil all over the place because it had been sitting upside down at some point. An imported engine has too many variables associated with it to make its factory HP rating. The only way to do it is if you invested into getting the internals redone before you drop the engine in.

[yellow_jacket]

I would have to disagree. There are many very good motors out there that can make great power. Yes there are abused motors that have been upside down and the like.

Like I stated previously. My stock red top with 72k kilometers put 190 hp to the wheels. This was under stock boost, smic, stock turbo etc. The only mod is the 3" exhaust. If the motor is rated at 205hp stock(at the flywheel) a 15% drivetrain loss should give you 174.25hp at the wheels. I am 15 rwhp above that. I don't think that is going to be attributable to an exhaust system. Especially seeing how others with the same or more performance modifications are making less power.

Would I expect this out of every motor? NO. But If you get a good front clip there are great possibilities.