Hi,
spool as promised.........

On the road we data logged the SC 50 it spooled as follows......
1 bar @ 2950 rpm
1.85 bar @ 3280 rpm.

All on road fuel, Shell V power, NO additives.

Cheers
Kev

 

1 bar @ 2950rpm---->1.85 bar @ 3280 rpm

I hope you had a tight grip of the steering wheel

 

Was this in a 2.5 Kev?

 

2.33 I believe

So can't really compare to my 2 litre - but interesting all the same

 

Kev,

Looking at the figures, Paul's gained about 30bhp, and lost about 30ftlbs of torque, but it would be good to see the real differences between the two turbos.

Can you overlay Paul's MD321T graph, with the new one, so the real differences can be seen ? It would really help to see the boost graph as well.



Mark.

 

Hi,
we have checked the original MD321T graphs and due to paul haveing suspension problems when it was originally mapped the graphs are innacurate also dyno compensation was adding BHP and torque.

With the SC50 we made 100% sure that there was no compensation and we have just re-newed all his suspenion to stop the car bouncing about, so what you see is what youve got, no bullsh1t, no race gas or additives, no one pouring dry ice on the intercooler, just a genuine mapping session with accurate results.

What I am prepared to do is after the shootout I will bolt the MD321T back on and run the car as a direct back to back comparison, Any one is welcome to attend, all input greatly recieved.

Nice result with the MD though.

Cheers
Kev

 

Terry,

Meant to say "well done" to you, & Simon for the mapping. That's a fantastic result for a 2.0lt, even with "additives" !

It certainly is the current record for an MD321T

 

Can I have my prize now then please

 

Hi,
Additives, we can try that one next week as well,
Be interesting to see what Mr. Crafts car will do with the SC50 and some race gas, may need a new gearbox though.

Cheers
Kev

 

That would be interesting. Mine made 10% more power and 20% more torque.

Can't wait to try this funny fuel on my own 2.33 future build

 

Terry, Tuning Bugs got you now Well done on the RR figure, see you Sunday

Iain

PS Your all lucky my new Supercharged Subaru won't make it in time for SSO

 

Looks like some great new turbos around now, back to back tests would be very useful, maybe for 2lt STI's etc

 

Ive got the md321h on my scoob, just waiting for dyno results to see what its producing, should be getting mapped now at scoobyclinic, they are a busy bunch this week, its all map map map getting cars ready for sunday, been some good results, hope mine is to .

 

The 321H is a cracker - especially for 2 litre road cars - great spool and loads of power and torque - I'm sure you're going to love it

 

Terry got a little excited last night as we watched the magic numbers come up, I think it was a big loud YES and a fist in the air

Excellent result for the turbo and mapping

 

how things move on

those are just the figures im looking for with my build

terry,
F**k me i bet that thing hits hard when it comes in, I have enough trouble keeping mine on the black stuff

 

So does Terry sorry Terry I couldn't resist.


It would have been nice to spend a little more time tweaking to get it how I wanted it on the rollers but the objective wasn't to extract every last horse from it but to find the best timing to run it at.. the slight dip in the graph at 6400 and up is it richenning up slightly..

But when you (Terry) are paying for the dyno time you spend the time on what is essential and save the fuelling tweeks for free black twisting roads

It was not an exercise to try and outshine some numbers already produced etc..

Simon

 

Terry - are you running Race Fuel all the time now or will you be swapping maps for special ocassions?

Simon - I think you did outshine some numbers already produced

 

Well done Terry & Simon, very good, >>> How do you swop maps ??????

 

Terry runs a GEMS from memory so you smply load a pre-saved map to suit the fuel you are using - from conversations with Terry hes simplky using pukka fuel for T/A, etc............

alyn

 

Yes the GEMS has a switch that can remove a preset amount of timing. I think it has been programmed now to remove 12 degrees - plus I can lower the boost setting with the AVCR on the non race setup. So basically it isn't optimised until I run the race setting with race fuel - but that's as good as a Gems can do. If I had an ECU with 2 full switchable maps, then that would be awesome But then the car is only really used in anger at events - so I can live with that.

 

Is 12 degrees the difference in advance between Vpower and Race Fuel?

Wow

 

Just out of interest, I have the option of a 2.5l or a 2.65l. My main goal is as close to 500/500 as possible with earliest spool/minimum lag, the rev limit on the 2.65 will be 7250 whereas the 2.5 will rev to 8250 if needed., however I heard that many turbo's are out of their efficient zone past 7000 rpm on a 2.5l.

Will a 2.65 give boost noticably earlier on the SC46/MD321T? Will it suffer any by not being able to rev through 7250?

Advice will be much appreciated.
thanks
will

 

2.5

 

Kev,

In what way would the suspension effect the accuracy of the dyno run ? Because you mention,

A car that bounces, slips, jumps, or climbs out of the rollers leaves very clear signs on the graph that something like this has happened, such as dips, or spikes.

The MD321T graph is smooth, and consistant, with no anomalies to indicate anything but a clean run.

Your Dyno Dynamics rolling road equipment is recognised as being one of the most sophisticated, and accurate rolling roads available.

It is designed to monitor several parameters, such as barometric pressure, relative humidity, and air intake tepmerature, (also shown along the bottom of each graph), and based on these readings, uses very sophisticated compensation tables to either add, or subtract power, and torque, to compensate for the atmospheric, and air intake temperature conditions.

Dyno Dynamics go a step further, and have the Shoot-44 mode, designed to be so consistantly accurate, that any figures obtained on the Dyno Dynamics rolling road in this configuration, are considered comparable world wide.

The only time it won't be either adding, or subtracting to/from the figures, is if the conditions exactly match what Dyno Dynamics have set as the baseline.

Since it would be extremely rare for the conditions to exactly match the baseline, nigh on all of the graphs will have some compensations applied.

Anyway, I don't doubt the SC50 will produce more power, it's a bigger turbo, I just wanted people to see the differences between them, but who knows what results you'll find next time.

Here are the two graphs for people to see.

Mark.

 

Very interesting comparison.

 

so the sc50 turbo is better,,as with the md it got 474 and with the sc50 it got 505,,,,(at this time)

and they say it can get more,,,it will be intresting when scooby clinic do the back to back tests



stu

 

it really depends on your definition of better - i would imagine that they are different cars to drive. Higher power doesnt always mean better.

 

this is on the same car,,,md = 474 /sc =505

stu

 

Thats subjective, the MD321T is pretty much generating max torque at 3800rpm, while the SC50 seems to be at a similar place on the chart at about 4200rpm. Also bear in mind the sclae on the charts, the MD321T has 2600-7400 rpm charted in a smaller horizontal space than 3000-7000 on the SC50 chart making it look narrower than it actually is.
Its impressive how the SC50 holds all the way to the end of the graph though, its still generating more than 480bhp through 7000rpm, the MD321T is really struggling over 7krpm, as can be seen with it dropping off to 420bhp. Draw into that what you will though as really you need a back to back test.

Seems to be what you'd expect, SC50 is a larger turbo, spools noticably later but generates noticably more power (and I'm sure there will be more to come given this is the first dyno run thats been seen on it).