16vmarc

scoobchrissy

iTrader: (1)

Sounds like that to me

johnfelstead

That doesnt seem to be the case based on all back to back previous testing Shaun.

chrisp

Mine ran 315bhp, 2000 Type RA with a tek3, sounds right to me.

fastfrank

yeah, I have to admit in all honesty that 265 does seem a bit OTT. Me and my mate were gobsmacked as those figures (ft lb) are higher than a stock Sti if you take the spec on the Subaru website. I read of someone on Scoobycity who got 255 with an Afterburner fitted. My mileage is now 21k so it should be well run-in.

After all, I would have been happy if the car just met the 225 factory claimed output but the extra was a mega bonus.

I did carry out the earthing mod as per the projectWRX website (thick gauge wire from engine to a better earthing point)... don't know if that could have made any difference? It does seem to make the car run a tinny bit better but sometime we like to think it does to

Why do people talk about the gear selected to go on the RR? What difference does it make what gear your in?

Frank

johnfelstead

The gear you use has an affect on how the turbo spools. If you use too low a gear you dont generate the load on the engine to pull the turbo spool in early enough or hold full boost that you would see on the road. Thats why i was running the TypeRA/R's in 5th and the UK turbo's in 4th, as doing that their respective gearing is the same.

The other thing you have to be careful of, especially on the new age cars, is getting the inlet temperatures down before you carry out a power run. If you dont manage that the ECU introduces a cut in performance to protect the engine from det. Thats why i was running the cars at light load for a while before doing the power runs, it brings the inlet and charge temps down significantly.

The other area that will affect spool is how low down the rpm range you are when you start your power run, i was running the cars from 1500rpm which helps get the inlet temps down a little and gives enough time to spool the turbo in a similar way to how it will work under road loads.

fastfrank

cheers John, interesting stuff. Another interesting thing was the comment one of the engineers made about draining the battery a bit (on new ages) prior to the run in order to keep the alternator active so you could get a reading for the torque figure - Complex stuff - Best left to the experts

johnfelstead

yes, on cars with individual coil pack's on the plugs like the early Impreza's and the new age cars, you cant use a conventional ignition pickup on the HT lead to register the rpm signal, so you have an electronic device that you connect to the battery that is able to see the small pulses the spark generates over the base battery volts, the electronic device then converts this into a signal the rpm pickup can read. To give a stable base voltage on the new age cars you sometimes have to increase the electrical load on the alternator to make it kick into life, as when that starts to charge the battery it has a regulated steady voltage, so the background noise is reduced.

Getting the alternator to work isnt to increase the engine load, its to smooth out the base voltage so the ignition pickup can see all the spark pulses, if you lose a few pulses the dyno cant calculate the correct torque figure, which was the problem on a couple of tony's runs.

ex-webby

Twas a joke.... hence the crying and laughter smilies!

Regards,
Shaun.

TonyBurns

iTrader: (3)

If it were well lane id probably be getting 330bhp

Tony

jimmy wrx

Yes I got 256bhp on a standard 03 wrx with afterburner backbox

rolling road ,clive Attowe ,Norwich

fastfrank

alright there Jimmy... that was the very one I was thinking of.

Hows the bike license coming along?

jimmy wrx

You must catch up m8

Been riding a cbr 600 for 2weeks ,scary but what a rush .Learn something every time I go out on it

sold the 03

SCOOBY TOWERS

iTrader: (7)

LOL - The RR was calibrated only 6 weeks ago, so it should give accurate readings

julian N/W wrx my93

so, does it matter if they measure the rpm with the electronic thinyg or just guess it?

i did 262 at prosport last year, with the measure thingy, then did 242 at well lane with added de cat d/p and dawes, but with them working out the rpm on the pc screen.

fastfrank

who knows mate... they are the experts. I pay the money and assuem what I get given is the final product.

MadMark

Congrats mate!

My 03 WRX posted 260bhp from just a Prodrive Backbox and Green Cotton filter!

johnfelstead

if you arent picking up the rpm signal from the engine then your power figure could be incorectly calculated if they havnt used the correct gearing for the car.

RR's measure torque, to generate the power value you have to know the rpm and use this formula Power=(Torque X rpm)/5252 to produce the power figure. Thats why the torque and power values always match at 5252rpm, if they dont the power run you have is meaningless, although the torque value will be correct.

fastfrank

My car is on this DVD!:

http://bbs.scoobynet.co.uk/showthread.php?p=4462216

ex-webby

Just looking at Chrisp's graph.... is'nt the torque & power (according to the physics behind all this) supposed to cross at 5250rpm (or what ever it is).

Just something I thought I read some where????

Maybe John "the egg" can comment.

Regards,
Shaun.

GaryCat

Kind of makes a mockery of the PPP doesn't it, if WRX's can make 260-265 bhp with just a backbox.

virgin

Yer but no but, how do we know the ppp is not getting alot more than the quoted 265ps then ?

Any one RR the above in blobeye ?

FrenchBoy

Yes me!

260 bhp and 271lb
I was happy with that. Especially as the peak torque comes in at 4k rpm.

Although you can achieve similar power figures with some simple modifications, the driving characteristics/power delivery is very different to the PPP.

Don't forget about the warranty blah blah blah.....

mightyyid

Come on fellas.

Its fine to compare cars on the same RR but to honestly beleive that a standard car with minimal changes would make 40bhp more is pushing it a bit I think. As someone else has pointed out, comparing RR is very hard to do, and comparing different cars on the same RR is also difficult - some of the beasts we see on here would be at 500 bhp without a second thought.

What would be great would be a PPP car on this RR - me thinks it would make about 300 or so and the owner would go away thinking how good his car is.

To be honest, if it was that easy to hit 265bhp, why would the PPP involve a new ECU? Bottom line - it isn't that easy and the figures I have to say seem very misleading on what is a basic car with very minimal mods. An extra 10bhp - possibly, but 40bhp. No way....

chrisp

Yep I thought that at the time but suddenly realized that the scale on the bhp is not the same scale as the lb/ft, so they will be slightly offset.

If you look at 5250rpm and read off the figures for each one of their scales then they are both about 285bhp and 285 lb/ft.

ex-webby

Ahhhh..... just proves I cant read either then!

Sorry for that.

Regards,
Shaun.