The old ej257 debate
 

Found this which made for some interesting reading... just thought id share it with a few of you on here
http://www.importtuner.com/tech/impp...h/viewall.html

very interesting, nice find that :thumb:

Link takes me to a blank page !

I wonder what RCM's take is on this??

I agree that alot of people do bin a perfectly good oil pump for no other reason than hearsay and paranoia, but then I don't have the hard cold facts at hand.

That was a great read.Thanks for that.
Since coming on here I've read so many threads where people are told "get ready to spend on a rebuild" that I've spent the last 6 months worrying and listening for any noises.
I feel a little less paranoid now.



Danny.

But look at this:

And then, the TOP tuners in the world, the longest serving of which started business in 2003, are ALL IN THE USA.

So........how much of the rest of it can we believe?

Arguably, they have been playing with the EJ25 alot longer than us though.

And also turbocharging normally aspirated versions too, as at one point USDM Scoobs didn't have Turbos.

True, but to call them the top Scoob tuners in the world is stretching it a bit :rolleyes:

A bit like "World Series " baseball and American football.....

I stopped reading when I got to here as I was laughing so loudly :lol1:
So they are basically saying that a standard STI engine can run 600bhp on its standard internals :rolleyes: damn it gets even better down the bottom on the page...

And yet its well proven over here that above 360-370bhp (fly and not wheel bhp) is that you have issues with the pistons, so what amazing things do the Yanks know that we dont? :rolleyes:

I would suggest anyone taking "advice" off any of those tuners, dont, listen to the tried and tested guys over here with a good reputation for building engines, dont go pushing them well beyond what they are capable of, be sensible and you should be ok :)

Tony:)

Americans always seem to get silly high whp figures for any and everything that they do. Some of the figures they come out with over there are crazy.

Claimed Yank WHP On a Dynojet dyno seems comparable with UK ATF figures on a DD dyno so I wouldn't read too much into those figures....

They are extremely insular: if it's not happening in America, it's not happening.

Thanks for that OP, thats why I had mine pro tuned last week and boy does the car feel better and I hope with regular servicing the car will hold 350/380 for a long while to come!

Enough go for me! :thumb:

Don't get me wrong I think ramming it up to around 380 bhp would be pushing it to the limit!

I don't think the increased capacity is the USP of the RCM pump though, is it? I thought it was a modification to a valve that has a propensity to stick open on the OEM pump leading to oil starvation???

I wouldn't be at all surprised if the article (when corrected for UK vs US bhp figures - USA horses not as big as ours lol) holds water! Expertly tuned 2.5s sitting in the mid 300s seem to do very well in the reliability stakes. They key seems to be getting shot of the original map (their explaination of the map issue was interesting - i never did buy the whole "it's just that the fuel cut was too aggressive" although Im sure that wasn't a good thing!).

I wonder what the UK mappers think of this?

Ns04

There is also a bit of a dangling carrot here. UK tuners do it too, maybe not so blatent though.

Carrot = Tuner "we'll get 350+bhp out of your scoob just from a few bolt-ons and a remap".
Donkey= Customer "great, do it!" < hands over a fist of ££££ >
Stick= Engine blows up 20,000 to 30,000 miles later (or sooner, or later depending on luck)
Carrot = Tuner "oh hard cheese old boy, but see this as a great opertunity to get forged internals so it can handle even more power!"
Donkey = Customer "great, do it!" < hands over a fist of ££££ >
Stick = Engine now forged, needs more bolt-ons and mapping to get more BHP
Carrot = Tuner "now your engine is forged we can fit this, and that and it'll make 450+bhp"
Donkey = Customer "great, do it!" < hands over a fist of ££££ >
Stick = Gearbox/clutch fails
Carrot = Tuner "oh hard cheese old boy, but see this as a great opertunity to get a stronger transmission/clutch"
Donkey = Customer "great, do it!" < hands over a fist of ££££ >


And it goes on and on until the customer either runs out of money or gets bored of the car breaking and sells it for something else ;)

Oooooooooo You old cynic you! ;) :D

I know it won't be enough to make a huge difference, but does anyone know the octane rating of fuel in the states?

I think theirs is 82 and 85.
Apologies if I'm wrong.



Danny.

I

Sad but true of some tunners

Dyno's - an invaluable tuning tool if used correctly
Dyno's - an invaluable sales tool if used incorrectly

Mon not ron rating, which equates similar to ours in ron I believe.

Tony:)

Copied this from a USA site:

( RON Octane Rating x 0.95 = AKI Octane Rating )
98 RON Octane x 0.95 = 93.1 AKI Octane (US measure)
100 RON Octane x 0.95 = 95 AKI Octane (US measure)

So, as you can see the 93 or 94 octane fuel we are all paying an arm and a leg for is actually quite comparable to the higher octane fuels found in Europe and Japan. The people whom have to worry about low octane rating are our friends out west in places like California that are subjected to substandard 91 octane.
91 AKI Octane (US measure) = 95.5 RON Octane