WRX03 265 result!
#35
Originally Posted by Greeny01
hmm, 265 seems a little high to me for a standard wrx.
I have exactly the same mods and got 235 bhp and rougly the same torque on a rr recently.
i would take rr results with a pinch of salt as they vary from rr to rr. fair play to you though if you are getting 265bhp then Im jealous! maybe the factory fitted the sti turbo by mistake!
Iain
I have exactly the same mods and got 235 bhp and rougly the same torque on a rr recently.
i would take rr results with a pinch of salt as they vary from rr to rr. fair play to you though if you are getting 265bhp then Im jealous! maybe the factory fitted the sti turbo by mistake!
Iain
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
#36
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.
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.
#37
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
#38
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.
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.
#39
Originally Posted by johnfelstead
That doesnt seem to be the case based on all back to back previous testing Shaun.
Regards,
Shaun.
#41
Scooby Regular
Join Date: May 2003
Location: www.scoobycity.co.uk
Posts: 889
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 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
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
rolling road ,clive Attowe ,Norwich
#42
Originally Posted by jimmy wrx
Yes I got 256bhp on a standard 03 wrx with afterburner backbox
rolling road ,clive Attowe ,Norwich
rolling road ,clive Attowe ,Norwich
Hows the bike license coming along?
#45
Scooby Regular
Join Date: Jan 2004
Location: St.helens!!!!
Posts: 3,639
Likes: 0
Received 0 Likes
on
0 Posts
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.
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.
#48
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.
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.
#49
#50
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.
Just something I thought I read some where????
Maybe John "the egg" can comment.
Regards,
Shaun.
#53
Scooby Regular
Join Date: Dec 2003
Location: South Bucks
Posts: 811
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 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 ?
Any one RR the above in blobeye ?
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.....
#54
Scooby Regular
Join Date: Jun 2004
Location: house in a street on the earth
Posts: 1,028
Likes: 0
Received 0 Likes
on
0 Posts
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....
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....
#55
Scooby Regular
Join Date: Nov 1999
Location: In wrxshire
Posts: 6,725
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by webmaster
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.
Just something I thought I read some where????
Maybe John "the egg" can comment.
Regards,
Shaun.
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.
Thread
Thread Starter
Forum
Replies
Last Post
fatboy_coach
General Technical
15
18 June 2016 03:48 PM
alcazar
Non Scooby Related
25
11 September 2015 08:45 PM