StephenDone

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.

StephenDone

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

john banks

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.

David_Wallis

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

Re-Bitten Hero

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 .

Cheers
Richard

StephenDone

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

Razor2001

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

john banks

What was the result? Cannot load the DDF at work.

Razor2001

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

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

Razor2001

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

Just for a laugh what do you think you could do the 0 - 60 and 1/4 mile in ? Go on, have a guess Humour me

Cheers,
Ray

john banks

All depends on the launch

Razor2001

oh sheesh

under 4 0 - 60 and under 12 1/4 mile ? Faster than a 911 turbo (recent model year) you think ?


Cheers,
Ray

john banks

I think it would be in the 4s and the 12s on the 1/4 that is all I'm saying

Denmark

iTrader: (2)

It´s the supersprint manifold

Skassa

ozzy

I still bet you'd both rather have one of these though



Stefan

john banks

Of course if it had a decent amount of boost

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]

ozzy

It has 0.8bar from 2,700rpm and twin-turbos, but I'm sure you could easily rectify that

Stefan

Razor2001

Anyone know the bhp and whp to weight ratio of a 911 turbo (recent model year) ?

Cheers,
Ray

Just curious Yes yes yes, if I had the cash I would have a 911 turbo in a flash over my JDM STi-7

Razor2001

Ok I did a little quick calculations for fun

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 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


John, do you fear anything on the road


Again, above was just for fun and may not be completely accurate

Cheers,
Ray

ozzy

Lifted from here

Max Power @ 6,000rpm = 309 kW (420 bhp)
Max Torque 2,700rpm - 4,200rpm = 560 Nm
Weight = 1540 kg

Stefan

ozzy

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

Stefan

john banks

No I have not found anything on the road that is suitable opposition, even though there is a TVR dealership nearby

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.

Razor2001

Ah, but power isn't everything. <<<--- agree 100%

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 as far as handling, don't forget John's car is lighter as well


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 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


Cheers,
Ray

Stefan

john banks

I fear Mr Forrest, until he runs out of gears or drives a 420 BHP Evo

[Edited by john banks - 2/13/2003 4:17:32 PM]

Denmark

iTrader: (2)

Try to mesure the 0-200km/t speed, as it´s 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

ozzy

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

Andy.F

That'll be cos mine is oft road just now then

john banks

Forrest Race Engines are planning something special so I will be able to pass even you maybe The engine builder there says I'll kick your ***

Andy.F

Oi ! You can't say things that without a banner ad !

Ah, you've got one havn't you

EMS

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 it´s 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.