How much power does an engine lose due to its age?
Obviously how it is driven will play a significant part in wear and tear but as an average does anyone have any idea and does remapping reinstate the initial power loss or is power only retrieved by modding and or new internals(clearances etc)
Thanks Ian

 

It depends on how well its been looked after, if its been well maintained and the injectors etc have been cleaned (redex etc) then the loss isnt going to be great, but on a badly serviced/maintained car, the loss will be considerably higher.

Tony

 

would you reccomend redex tony, does it work

 

Yes it does actually work, had a few "older" cars that have felt sluggish, one being a lowish mileage ford mondeo which had just done town driving, got it on an open road... oh not quick, 1 bottle (yes full bottle) of redex later, she flew
Ran that car for another 40k miles, had to change the rear wheel bearings (and normal servicing) but no other issues.

Tony

 

Redex in a scooby? I was told not to with my last one. No explanation given as to why though.

 

There should be no issues putting redex in there, now putting unleaded in there I would say was an issue but as pretty much every 95+ ron petrol has detergents in (similar to redex) id be amazed if they caused problems

Tony

 

ive seen 15 year old scoobies on original engines still push out 300+bhp

 

I hope so, as mine is 14 years old and I want around 330ish eventually!!

 

Had a power run a few yrs back on my00 80k, made 213.9. Yes means diddle poo as it may have been more when it came off the line. But still nice to no it was making standard power after 8yrs.

 

when i first got my 98 wrx four years ago i put it on the rollers and it was standard the garage said it would only make 250 bhp pr 260bhp if i was lucky it made 276.2 bhp and that what it come out of the box with 280 ps which is about 276 bhp 65000 mile son it i guess it was juts well looked after, but saying that it had good piston slap when it was cold back then

 

When i got my 93wrx in 2005, on the rollers it made 213, after oil change, plugs, cam belt, filters and a decat moved it up to 234, if serviced and warmed up and down properly power loss is minimal and will last as long as your normal family saloon

 

As far as I know mine is on its original engine.

I'm the only UK owner (for 7 years) after it spent 10 years in Japan. With a few tweaks here and there its running 325 bhp. Only 62k miles though.

 

I have used STP injector cleaner with good results. Even did a blind test on my dad who taught science and said these products don't work until I proved him wrong.

 

My MY93 WRX's original stock engine (before it was rebuilt/mapped) made 249.5bhp back in 2007 - some 14yrs later and 12.5bhp more than std.

Mind you, there are so many variables when rolling roading...

 

my 93 wrx made 245bhp at scoobyclinic with just a magnex backbox. its 240ps standard.
ive now fitted a z4 ecu and centre section and im hoping its good for 255bhp now.

 

Oh yeah, I forgot to mention it had a cat-back system and Green panel... so helped with getting the gases in and out a tad...