Dyno run today,can someone take a look at my graph ?
10 May 2008, 07:11 PM
#1
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Dyno run today,can someone take a look at my graph ?
Had my scoob on the dyno today at Powerstation,was hoping for at least 370-380bhp but it only managed 334bhp !
The last time I had it on there,the air filter got wet so could only run low boost and was misfiring and made 335bhp !
So today running 1.55 bar it made pretty much the same as when it was running on low boost with a misfire
Looking at my 2 graphs,today it produced nearly 50bhp more at the wheels than last time but very slightly less at the flywheel.
Please take a look at my graphs at let me know what you think.
Previous run,low boost with misfire:
Todays run,1.55 bar,no problems:
My full spec is in my profile
The last time I had it on there,the air filter got wet so could only run low boost and was misfiring and made 335bhp !
So today running 1.55 bar it made pretty much the same as when it was running on low boost with a misfire
Looking at my 2 graphs,today it produced nearly 50bhp more at the wheels than last time but very slightly less at the flywheel.
Please take a look at my graphs at let me know what you think.
Previous run,low boost with misfire:
Todays run,1.55 bar,no problems:
My full spec is in my profile
10 May 2008, 07:16 PM
#2
Well looking at the graphs.. you must have had something wrong with your transmission or something before on the first run, as they're some serious losses! Whereas the new graph is much more like it, plus it seems like the second run it was MUCH hotter..
10 May 2008, 07:21 PM
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It was alot hotter today as the previous run was in december.
When I first got this car it ran 340bhp/320lb/ft on the standard TD05 turbo.
With a TD05/06 20G it should do alot more than 334bhp
10 May 2008, 07:25 PM
#4
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the 2nd run seems more fluid, with little tail off. the oil temp is much higher thus will give less drag. last time mine was done it hit 315bhp, but now its running 24psi of boost on TD05 with remap so i guess its the same roughly as yours.
i also noted more at the wheels in the 2nd which would indicate maybe a slipping clutch in the first run?
i also noted more at the wheels in the 2nd which would indicate maybe a slipping clutch in the first run?
10 May 2008, 07:31 PM
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the 2nd run seems more fluid, with little tail off. the oil temp is much higher thus will give less drag. last time mine was done it hit 315bhp, but now its running 24psi of boost on TD05 with remap so i guess its the same roughly as yours.
i also noted more at the wheels in the 2nd which would indicate maybe a slipping clutch in the first run?
i also noted more at the wheels in the 2nd which would indicate maybe a slipping clutch in the first run?
With my spec I should be getting anything between 360bhp-400bhp,that's what I built the car to do so i'm very disappointed at the moment.
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10 May 2008, 07:59 PM
#9
Your car seems to make its power/torque late in the rev range.
My car a few years ago made 336bhp@powerstation on a 20G with 1.2 bar, that was with a 2.5ltr and uk heads.
I tend not to bother with RR but a real time recordings, like from a drag strip.
Does your car feel quicker?
My car a few years ago made 336bhp@powerstation on a 20G with 1.2 bar, that was with a 2.5ltr and uk heads.
I tend not to bother with RR but a real time recordings, like from a drag strip.
Does your car feel quicker?
10 May 2008, 08:15 PM
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Your car seems to make its power/torque late in the rev range.
My car a few years ago made 336bhp@powerstation on a 20G with 1.2 bar, that was with a 2.5ltr and uk heads.
I tend not to bother with RR but a real time recordings, like from a drag strip.
Does your car feel quicker?
My car a few years ago made 336bhp@powerstation on a 20G with 1.2 bar, that was with a 2.5ltr and uk heads.
I tend not to bother with RR but a real time recordings, like from a drag strip.
Does your car feel quicker?
My mate has a scoob with 300bhp 320lb/ft and I took him out in mine after the run and he said mine would leave his standing.
10 May 2008, 08:30 PM
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Rolling roads give different figures all the time, ive had mine rolled on the same rollers 3 different days with the same spec and it pulled 430 one day 413 on another and 407 on another then 420 so I wouldnt bother, its how it feels on the road that counts.
Dougie
Dougie
10 May 2008, 09:22 PM
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Did I do the original run (on the dyno day where it was misfiring)
If so I'm likely to have braked on the run down as it's pointless trying to get a run out of it if it's not right.
IIRC it was the best of two attempts (and worse on the second go) with it misfiring (after trying it on low boost for the second run)..
Todays looked good, although I wasn't able to watch any gauges from the engine bay.
Edit to add, maybe Rich did the run in 5th ( I didn't see) that would DEFINITELY explain it.
If so I'm likely to have braked on the run down as it's pointless trying to get a run out of it if it's not right.
IIRC it was the best of two attempts (and worse on the second go) with it misfiring (after trying it on low boost for the second run)..
Todays looked good, although I wasn't able to watch any gauges from the engine bay.
Edit to add, maybe Rich did the run in 5th ( I didn't see) that would DEFINITELY explain it.
Last edited by Fuzz; 10 May 2008 at 09:26 PM.
10 May 2008, 09:29 PM
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Did I do the original run (on the dyno day where it was misfiring)
If so I'm likely to have braked on the run down as it's pointless trying to get a run out of it if it's not right.
IIRC it was the best of two attempts (and worse on the second go) with it misfiring (after trying it on low boost for the second run)..
Todays looked good, although I wasn't able to watch any gauges from the engine bay.
Edit to add, maybe Rich did the run in 5th ( I didn't see) that would DEFINITELY explain it.
If so I'm likely to have braked on the run down as it's pointless trying to get a run out of it if it's not right.
IIRC it was the best of two attempts (and worse on the second go) with it misfiring (after trying it on low boost for the second run)..
Todays looked good, although I wasn't able to watch any gauges from the engine bay.
Edit to add, maybe Rich did the run in 5th ( I didn't see) that would DEFINITELY explain it.
It seemed to go well today,that's why i'm disappointed with the figures.
Max injector duty was only 90% !
Not sure which gear Rich did the run in but he did mention about how close the 'box was !
It goes really well on the road but the dyno figures just seem so low
10 May 2008, 10:29 PM
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My vf35'd wrx made very similar figures to yours, last summer at PS. It's had a tweak or two since so now maybe more (certainly feels quicker), so the 20g on yours should be more IMHO..
HOWEVER, we all know not to read too much into dyno figures, especially on a road mapped car..!
Do you know if your speedo is fairly accurate or how much it over reads..? If so (safely) try timing a few 60-100 runs through the gears, allowing for any speedo inaccuracy as much as possible. Comparing it against others and also the www.letstorque calculator can be a good indication of what level your at..
Either way, I wouldn't worry about it, just find another car you know to be quick (RS4/M5 et al) and show them a clean pair of heels..
HOWEVER, we all know not to read too much into dyno figures, especially on a road mapped car..!
Do you know if your speedo is fairly accurate or how much it over reads..? If so (safely) try timing a few 60-100 runs through the gears, allowing for any speedo inaccuracy as much as possible. Comparing it against others and also the www.letstorque calculator can be a good indication of what level your at..
Either way, I wouldn't worry about it, just find another car you know to be quick (RS4/M5 et al) and show them a clean pair of heels..
11 May 2008, 10:23 AM
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I have a feeling the actuator maybe weak,Andy Forrest has sent me a new one so maybe that'll make things better.
12 May 2008, 01:34 PM
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Yeh was hoping it would last longer than a couple of days since mapping 
Still I think it's done pretty well, seeing as a standard evo clutch isn't meant to take much more than 330
So I now need a bigger turbo and a clutch
No don't think Si has had it on any other RR's.
Still I think it's done pretty well, seeing as a standard evo clutch isn't meant to take much more than 330
So I now need a bigger turbo and a clutch
No don't think Si has had it on any other RR's.
12 May 2008, 02:26 PM
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Ignore the bar figures, you have nearly 50bhp more at the wheels, there is either an error in the way the transmission losses have been measured, or someone has been messing with the dyno settings.....90bhp is quite a lot to loose, but can you imagine the heat 138bhp was (allegedly - that is 50 x 2Kw eletric fires heating your driveytrain if its true) putting into gearbox/diffs etc - they would have been glowing cherry red!
I won't name names but a friend who knows dyno's watched a certain RR place set up a unichip on a Celica CS and then claim an extra 35bhp, trouble is he watched them offset the known dyno losses by 30Nm between runs.....
Simon
I won't name names but a friend who knows dyno's watched a certain RR place set up a unichip on a Celica CS and then claim an extra 35bhp, trouble is he watched them offset the known dyno losses by 30Nm between runs.....
Simon
12 May 2008, 08:08 PM
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No mate,hasn't been on any other RR yet.
Maybe i'll pop back over and you can do the job properly this time
I know I have a boost issue as when it was mapped it would hold 1.55 bar until about 5500rpm iirc and then it would drop to approx 1.1-1.2 bar.
I have a new actuator that Andy Forrest has sent me so i'll fit that,get the map checked and pop over and see you and we'll try again
By the way,do you know what gear Rich ran it in ?
Maybe i'll pop back over and you can do the job properly this time
I know I have a boost issue as when it was mapped it would hold 1.55 bar until about 5500rpm iirc and then it would drop to approx 1.1-1.2 bar.
I have a new actuator that Andy Forrest has sent me so i'll fit that,get the map checked and pop over and see you and we'll try again
By the way,do you know what gear Rich ran it in ?
12 May 2008, 11:09 PM
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No idea what gear it was in fella. Yep, pop up when when I'm not up to my ears in bolt on turbo bits that don't bolt on. 
I will do it in 5th I think, as I could see rich was having traction problems at the start. Have you got nang kang tyres on it or something or RA gearing?
If your car was running properly I would have done it right first time round.
I will do it in 5th I think, as I could see rich was having traction problems at the start. Have you got nang kang tyres on it or something or RA gearing?
If your car was running properly I would have done it right first time round.
12 May 2008, 11:21 PM
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No idea what gear it was in fella. Yep, pop up when when I'm not up to my ears in bolt on turbo bits that don't bolt on.
I will do it in 5th I think, as I could see rich was having traction problems at the start. Have you got nang kang tyres on it or something or RA gearing?
If your car was running properly I would have done it right first time round.
I will do it in 5th I think, as I could see rich was having traction problems at the start. Have you got nang kang tyres on it or something or RA gearing?
If your car was running properly I would have done it right first time round.
It's got an Sti 5 Type-R 'box and diffs but a UK 5th gear so i'm told !
Might leave it until I fit the new actuator and get it remapped,just wanted to see what power it put down as it is before sorting the boost issues out
