|
The ECU becomes too busy to chat at some points in the rev range. All you can do is reduce the number of logged parameters until the ECU is willing to devote enough time for the amount of data.
To drop your capture interval to below 200ms is a different issue. Simply drop the number of logged parameters until the capture interval reduces to what you want. |
The differences you are seeing are rounding errors. The ECU returns pressure in 0.15 PSI increments. DeltaDash then rounds to 1 decimal place. We're going a bit off the dyno topic now though.
Cheers Steve |
Star's rollers are taking 35 seconds approx (fixed) to run from 2500 to 6500 under WOT in any gear. On the road my car does this increment in about ONE FIFTH of this time in 3rd gear.
|
Andy... too late to go get camera now.. send me a mail to remind me if I havent done it tomorrow evening..
I was recording christians for him.. or trying to.. David |
On the rolling road runs I've done, I've never seen as high boost on the rollers as I do on the road. Last PowerStation run was about 16.5psi max, 16psi held (MY00 PPP) but on the road with the same ambient temperature, I've seen a peak of nearly 20psi and held 17.5psi. Gauge confirmed as being consistent with ECU readings by PS.
A difference of 1.5-2psi will be a difference of up to 10-20lbft torque, and possibly the same in peak power? It's worth noting that because of the tests to confirm the boost gauge accuracy, the car had been on the rollers for about 5 minutes or so with about 3 full throttle runs before the actual power run. My thoughts are the engine was running rather hot by this point :( which is why the boost was less, and I bet the intake temperatures were rather higher. Talking to Mike Wood at the Prodrive Live thing this time last year, he was explaining about rollers vs. real life in a bit more detail. He was saying that the situation is different on the rollers to real life (which we all know anyway :)) because it's also down to the aerodynamics and air flow around the car, which causes better cooling and also different cooling to just sticking a fan in front of the car. He said that the only way to accurately simulate a real-life run is to take it to Mira and stick it in the wind tunnel, which makes sense! The difference in Star rollers vs DeltaDash etc is interesting and a little concerning... Anyway I'll carry on watching this thread... extremely interesting "Old Skool Scoobynet" thread :D. Cheers Richard |
Mark Verhoeven from EMS has got some good figures on an STI Type UK that he has just tuned, including manifold:
http://www.ecutek.com/downloads/STI7-EMS.DDF Cheers Steve |
That is an excellent result ! I wonder how much difference the manifold made. Without the manifold I would assume that 260 whp and 255 ft. lbs. would be reasonable with just a catless zorst and ecutek remap on a JDM STI-7 ?
Cheers, Ray |
What was the result? Cannot load the DDF at work.
|
Here you go John. Your graph was very similar (he had you ever so slightly, but I guess that is due to your biggger turbo and at the top you gained on him nicely) until about 4,000 rpms where your car kept pulling :D
Cheers, Ray Dyno Test: Sti7-ems =================== Comment: STi7 with Supersprint manifold & ported wastegate, holding 1.28 bar until 5000rpm, dropping to 1 bar at 7000rpm. Mapped by Mark Verhoeven of EMS. Maximum Wheel Power: 281.3 BHP @ 5799 RPM Maximum Wheel Torque: 277.6 LbFt @ 4750 RPM Power to weight ratio: 175.8 BHP per ton Terminal velocity due to power: 179.4 mph In Gear Acceleration: 30 - 50mph = 3.7 seconds 40 - 60mph = 2.7 seconds 50 - 70mph = 2.5 seconds 60 - 80mph = 2.6 seconds 70 - 90mph = 2.9 seconds Speed per 1000 RPM: 1st: 5.2 mph 2nd: 8.0 mph 3rd: 10.8 mph 4th: 14.2 mph 5th: 19.6 mph 6th: 25.2 mph Maximum Speed per Gear: 1st: 39.8 mph 2nd: 61.0 mph 3rd: 82.2 mph 4th: 107.6 mph 5th: 149.1 mph 6th: 191.5 mph Vehicle Mass: 1600kg Drag Co-efficient: 0.37 Frontal Area: 2.20 square metres Wheel/Tyre Setup: 225/45/17 Rev Limit: 7600 Test gear: 4 Max Speed of gear: 102 mph |
Course I mean he had you up until about 4,000 rpms and only on the graph, obviously your power to weight ratio is insanity and real world in gear driving bananas :D
Just for a laugh what do you think you could do the 0 - 60 and 1/4 mile in ? Go on, have a guess :D Humour me :D Cheers, Ray |
All depends on the launch :p
|
oh sheesh :D
under 4 0 - 60 and under 12 1/4 mile ? Faster than a 911 turbo (recent model year) you think ? Cheers, Ray |
I think it would be in the 4s and the 12s on the 1/4 that is all I'm saying :p
|
:D:D
Itīs the supersprint manifold:D Skassa |
I still bet you'd both rather have one of these though :p
http://www2.uk.porsche.com/english/g...intro_foto.jpg Stefan |
Of course if it had a decent amount of boost :p
The manifold setup is giving about 16 BHP more than the average of the runs for the map I did the 2 days ago, but I was using 0.35 for drag rather than 0.37. Sounds like running similar boost. [Edited by john banks - 2/13/2003 2:01:37 PM] |
It has 0.8bar from 2,700rpm and twin-turbos, but I'm sure you could easily rectify that :)
Stefan |
Anyone know the bhp and whp to weight ratio of a 911 turbo (recent model year) ?
Cheers, Ray Just curious :D Yes yes yes, if I had the cash I would have a 911 turbo in a flash over my JDM STi-7 :D |
Ok I did a little quick calculations for fun :D
STI-7 JDM ES tuned: 281 whp x 1.3 = EST: 365 bhp 1430 kg weight = 3,160 lbs / 2,000 lbs (1 ton) = 1.58 tons Power to weight = 365 / 1.58 = 231 Brand new 911 turbo (specs per USA web site): 420 bhp 1540 kg weight = 3,403 lbs / 2,000 lbs (1 ton) = 1.701 tons Power to weight = 420 / 1.701 = 246 John Banks mean machine: 320 whp x 1.3 = EST: 416 bhp 1250 ??kg weight = 2,763 lbs / 2,000 lbs (1 ton) = 1.381 tons Power to weight = 416 / 1.381 = 301 :D :D crazy !! and for fun: Brand new 911 GT2 (specs per USA web site): 456 bhp 1420 kg weight = 3,138 lbs / 2,000 lbs (1 ton) = 1.569 tons Power to weight = 456 / 1.569 = 291 :D John, do you fear anything on the road :D Again, above was just for fun and may not be completely accurate :D Cheers, Ray |
Lifted from here
Max Power @ 6,000rpm = 309 kW (420 bhp) Max Torque 2,700rpm - 4,200rpm = 560 Nm Weight = 1540 kg Stefan |
Ah, but power isn't everything.
Will JB's car stick to the tarmac as well as a 911? Both have 4WD (OK AWD on a Scoob). And will JB's car hit 190mph? 911's still the better f@nny magnet ;):D:D Stefan |
No I have not found anything on the road that is suitable opposition, even though there is a TVR dealership nearby :D
I think you are overestimating my power though. 1.3 is a strong multiplier, and I would say it is more like 315 BHP at the wheels, so about 380 BHP flywheel. |
Ah, but power isn't everything. <<<--- agree 100% :D
Will JB's car stick to the tarmac as well as a 911? Both have 4WD (OK AWD on a Scoob) <----- I don't think there would be much in a properly setup STI and 911 turbo when it comes to handling. Any difference would be sorted on the straight aways due to the 50 bhp per ton advantage :D as far as handling, don't forget John's car is lighter as well :D And will JB's car hit 190mph? <---- course not, but 175 maybe ? 911's still the better f@nny magnet <---- you have just stated the obvious my friend :D This was never suppossed to be a Imprezza vs. Porsche thread, overall etc etc the Porsche is on a different level, it was just to show that straight line accelleration and John's car is crazy :D Cheers, Ray Stefan |
I fear Mr Forrest, until he runs out of gears or drives a 420 BHP Evo :p
[Edited by john banks - 2/13/2003 4:17:32 PM] |
Try to mesure the 0-200km/t speed, as itīs listet on the most powerfull German cars!.
You would be surprised what car a modded scoob can match . Just a few Audi RS6 = 16,8sec Ferrari 360 = 16,2sec BMW M5 = 17,8sec Pork GT3 = 14,3sec |
When you order DeltaDash are you supposed to get overnight delivery in the UK or just 3 day registered post?
Ordered mine on Tuesday and I'm still waiting on it [img]images/smilies/mad.gif[/img] If it's just registered post, can the EcuTek boys please update the website accordingly :( Stefan |
No I have not found anything on the road that is suitable opposition |
Forrest Race Engines are planning something special so I will be able to pass even you ;) maybe :eek: The engine builder there says I'll kick your ass :D
|
Oi ! You can't say things that without a banner ad !
Ah, you've got one havn't you :D :D |
I think the manifold brings about 20 - 25 BHP (flywheel) at the same boost. I got about the same figures with 0.15 bars less boost compared to the std. manifold. Unfortunately I am maxing out the injectors from 5.500 RPM, so this will be the limit for now.
The car is a joy to drive, it is on full boost from 3100 RPM in 4th gear and itīs very responsive. I took the owner of a BMW M3 E46 for a drive and he was realy impressed (mainly by the torque). A back to back comparison with this car will follow. We are waiting for some 650 cc injectors. These will be fitted combined with a decent turbo.......... Mark. |
| All times are GMT +1. The time now is 02:00 PM. |
© 2024 MH Sub I, LLC dba Internet Brands