TB993tt

Very impressive power and performance, what weight are you running for that 4s 100-200 and how much boost for those dyno numbers ?
When does the boost peak on the road, that 4000rpm peak on the dyno is surely not correct, it should be boost at 2200rpm and full torque by 3000rpm ? also can I ask how long that dyno run takes, is it an 8 second jobbie or does it get decent loading ?

Thanks for sharing

Rickard 993 Turbo

1,55 boost
1200kg empty, like 1350kg with fuel and me

The dyno is correct..
The motec logg says the same.. i have full boost at 3500rpm

Its a 5 gear pull with no brake ,it takes around 6 sec
I could have loaded it if we wanted but thats not how its done here if we like to compare

They dynoed a RS tuning gt3 , 1 week before 5hp and 5nm was the diffrence

PS: I was looking through your 3,9 liter VTG dyno papper and you have 734hk@6260rpm and 921nm@4220rpm why should my little 3,6 liter have max torque 1200rpm before yours..?

And i dont think you fully understand the beniffit of running E85

TB993tt

Turbo cars chassis dyno differently to NA cars, the 1100NM is a clue also if you have full boost at 3500 the dyno does not show this because of the lack of loading. I think you can disregard the low down torque numbers, unless the engine is braked properly like in a manufacturer measurement but maybe the maximum power is correct, certainly your performance indicates it is !

On VTGs mine was reaching full boost by 2500rpm, this is benefit of 3.9 and engine dyno accurate tuning.

Can you explain the benefits of the E85 compared to just 99RON ?

Rickard 993 Turbo

Im very confident the dyno is correct i have dyno turbos and gt2 before there the numbers are right

http://www.speedhunters.com/2015/04/...about-ethanol/

I can run like 5-10 degrees more timing
I'm running intake temps at 30-35 degrees

I know you are sceptical to everything and you are right to be, some of the USA numbers are a yoke but some time other people are right and can be better then you

I did test the E85 before the dyno and it was more like E95 so thats like +115okt RON

Rickard 993 Turbo

Here I a clip from the car at Mantorp,look at 1,58-2,20 and you can se the acceleration and speedometer



Here is a 100-200km/h log 4,37 with big lift off and 1 shift 3 to 4

TB993tt

"People can be better than you"

Err yes you are better than me - congrats

You are into your racing and have a lightweight fast car which is great for you but 8 second chassis dyno runs do not measure turbo torque accurately and this looks to be the case with your 1100NM. Show me a loaded Hub dyno and I'll gladly tell you again how much better than me you are ��

Rickard 993 Turbo

This dyno messerue turbo accuratley on turbo cars, they have done oem messurment for Nissan and Honda so they are very accurate, so no issoue with Turbo and NA cars

But for you I will put load on it next time, but next time its without VTG im going with bigger turbos now but still E85

Rickard 993 Turbo

My car spools up a little later then other VTG cars, but thats of the exhoust camshaft i have timed diffrently to get more torque/hp on higher RPMS, if you look it doesnt drop of as drastic to others.. better for track use..

TB993tt

Measuring OEM turbo motors is often accurate on these dynos because of the factory tuning so that OEM will give that torque number loaded or unloaded but an ace mapper can easily get more torque (measured)on an unloaded dyno which would disappear with a proper braked measurement - the whole snake oil tuning industry is based around this !
having said all that I am not writing off your 1100NM claims but they just don't reach my measurement standards....

Next time you are at the ring book in with Manthey and get them to test your engine on their Maha rig, those guys know how to load an engine

Rickard 993 Turbo

Okey.. understand what you are saying..

remove 200nm then if you think thats more accurate, but we dont have a simmular car to compare agaisnt so its hard to say right or wrong..

But the dyno and the track/street are the same with when the boost comes and etc..

No Nur for me with this car, its to fast and not setup for the Nur..

Rickard 993 Turbo

Okey.. understand what you are saying..

remove 200nm then if you think thats more accurate, but we dont have a simmular car tocompare agaisnt so its hard to say right or wrong..

But the dyno and the track/street are the same with when the boost comes and etc..

No Nur for me with this car, its to fast and not setup for the Nur..

TB993tt

All I am saying is the measurement is not like a manufacturers that is all, you may well have 1100NM, it certainly looks f**king fast in your video !

I always recommend reading through this site in particular "the column" , really explains a lot about power train measurement.
http://www.rri.se/index.php?DN=38

Rickard 993 Turbo

One thing i did notice in the Durametic logg from your pulls

Is that you boost falls of, my boost hold 1,55 to redline..

I know you car is a street car and need to meat the regulations and etc, just intressting to compare..

TB993tt

My boost is "all over the place" because the programming is done like factory so it is all about hitting the programmed torque targets and the program continually adjusts boost according to many conditions. Some days I see 1.2 bar at 7000rpm and some days 1.05 bar.
What is interesting (to me ) is that on vmax days my 320kph IATs are very similar ~55C (for 15-20C ambient) whether the boost is 1.05bar at high revs or 1.2bar which suggests that the engine is still doing the same amount of thermal work regardless of the boost and this is borne out by similar vmax top speeds.
When stamping on the throttle my program gives a big overboost up to 1.4 bar for a few seconds even at higher revs....

Todd's strategy is fix the boost and tune around it, it is a simpler concept but he's been doing it for 25 years and has it very refined. I always worry that this strategy can cause big problem if on a very hot day the IATs get critical and the fuelling + ignition adjustments do not lower it adequately but I think there is an ignition cut off available in the program for that eventuality.

TB993tt

lol