Presumably you mean lb/ft as 340 nm is near about 225lb/ft which is under stnd.

Ross

Oops I meant 440 Nm of course

PS: Wheres my pic h2ypr?

here's the Graphs:

http://i11.photobucket.com/albums/a198/suba11/GT28RSgraph.jpg

http://i11.photobucket.com/albums/a198/suba11/GT28Rgraph.jpg

http://i11.photobucket.com/albums/a198/suba11/CoupeGT3071Rpower.jpg

John - would the issue there have been the high rev limit rather than the torque? Doesn't the stress on the rods increase at a massive rate when you go that high on the rev limit? I'm sure that the torque would also be a factor though!

Why don't the power and torque plots cross at 5,250rpm?

As far as I can remember, they MUST cross at this point, regardless of the scale of measurement (KW & Nm or BHP and lb-ft)

It looks like the graphs are being moved around for some reason

They're not on the same scale ...

I've heard this aswell. Those graphs are very difficult to read. Peak torque on the first one is 390nm? Thats about 284lb/ft? Second one is 460nm? Thats around 335lb/ft? Unless im working it out wrong?

Ross

Thats a club site. Checked another site and its multiply by 0.73.

Ross

Dude u changed ur post - just say u were wrong!

Wasnt denying i was wrong. Sorry if it came across that way. Check my edit reason. I got my calculations wrong. I thought it was 0.66 but its 0.73. That site does nearer 0.75.

Ross

Hi TurboJ,

Short and simply answer, yes . Like I explained my Top Speed run was made with excat the same setup and all the gears through with full throttle . There was only one Sierra Cosworth (+650 bhp) with 281 km/h and Porsche Turbo (997) with 271 km/h ahead me, for example Audi RS6 stayed well behind me with 245 km/h, so I guess I have used at least amount of power + torque as was given in RR .

Also like Flea explained, I have used +350 lb-ft already over two years. My first high power RR was with GT28RS (335 bhp and 376 lb-ft). This graph was also posted to the Forum.

Think if some tuner says, that it is safe to run with that amount of power / torque and you crash yuor engine. Who is to blame? That is why they always answer you so that they can be quite sure, that with given values your engine stands.
At least this is how I see it.

I don't have any clear answer to that, why my engine stands (so far )or my friends engines stand these kind of figures, but we beleive to know what we are doing .

About the graphs, they don't cross because of the scaling, left hand you have power in kW and in right hand you have torque in Nm (1 lb-ft is about 1.356 Nm), so by dividing the Nm values with 1.356, you should receive the lb-ft torque value.

- Jari -

@Suba - I never used to go over 7k with std rods because of the rod bolt potential problem so my issues were not related to that. Anyway, I asked Arrow rods for some consultancy on the 2.0 std rod and they told me it was definitely not good for 400BHP and 400lbs/ft.

The torque delivery of the 2.4 is very different but only because you chuck such large turbos on a 2.0. I've seen a 2.0 that made 350lbs/ft torque at approx. 3200rpm for instance. Although it did break a rod

Also on my 2.4 the torque came in pretty gently as is common with larger turbos.

@Flea - I've been to powerstation!

Nice to see the various power graphs Jari How do you feel about your setup at the moment? It looks just about spot on for the drag strip but is it ok to drive around town?

@John, let's be seeing your graph then

I can get around 300lb/ft at that rpm aswell.

Ross

Who are they or are they staying anonymous?

It was years ago My car made 227BHP on Powerstation rollers and 189BHP on Owen Devs rollers. Same setup and within 3-4 weeks of each other.

Reason I wouldn't go back to Powerstation is my car was overheating on their dyno due to their hairdryer fan and they still did about 6-7 power runs on it. Even tried to spray my intercooler knowing their fan wasn't up to the job like cowboys. I think theres a fair few people on the forum who will remember that.

Ahh, that's different to what they have now. The fans are very powerful all within a totally enclosed cell coupled with a new dyno. There have been plenty of dyno days there since and all making expected or lower power With my old setup I was consistently running 360bhp there the same as PTS. As for Owen Devs, well last time Barbz was there he got 440bhp with a boost leak... on the road I was pulling a bit at the top end so make of that what you will

Powerstation are the leading Subaru tuners and won Time Attack, they certainly are a very professional outfit these days!

The most impressive graph seems to be the RS ... decent low down torque and top end - what other mods was he running?

Here is a comparison of the three Finnish coupés

Torque

BHP

Discuss!

looking at those graphs, you'd have to say the least powerful car would probably be the quickest on some really twisty roads

Interesting comparison flea.

Can you add in sheiks mines and subas to the torque graph?

Ross

@Flea - yes completely different to what it was.

Hi Flea,

These are good graphs .

And yes, the GT28R is most propably to best setup for driving o twisty roads . Ok, it depends on how twisty they are...
When I and my friend with that GT28R turbo came back from Top Speed competition, there were a road section, which is very twisty. We drove it "quite" fast and hard and there were many part in the road where I should change to 2nd gear, but I was affraid to loose the grip. Because also with 3rd gear I was loosing the grip in high revs. My friend could easily drive it with 3rd gear. All in all I had to drive harder than my friend, just because of the lost of low down torque , but in straigh sections... .

Flea, my setup is quite comfortable and easy to drive "normally", but I have to remember to keep the rev's above 3000 rpm, if I want to be "awake" .

One very important thing in Coupe, look my graph! After 3000 rpm power drops dramatically, this is the reason for intake cam to move that 18 degrees backwards! With this turbo it is first time to see clearly.
Now I will "fix" the intake cam to "sharp" position to avoid that power drop. Maybe I gain also something .

- Jari

PS. Tomorrow quarter mile run in very rough surface, I'm going to try the Hoosier once again. Either way, new record or clutch totally destroyed . This is life...

Jari,

Can you send me an e-mail at fccuk@chorus.pp.se? I get an out of office-reply on you adress