Riss Racing catless DP

[Zuzu]

Was that a cut and weld mod?
So all the new DP's that are ordered will have this mod already done in the US ?

[WAY]

No the pipe remains intact. Not sure about the details. You will have to talk to Andrew.

[Zuzu]

No probs..Thanks Wayne.

I will give andrew a call later today.

[Kris]

If thats the case, any exhaust shop can replace the O2 Sim location...

[Riss Racing]

It was the O2 bung. For RHD it's needs to be moved over and re set. Andrew took care of this no problem and we figured out the fix for it from here on out. Thanks to Wayne for sure being the test mule and Andrews hard work to make it work!

[Kris]

anthony, will you produce RHD pipes now based on that resolution? or do we need to go through Andrew for this?

[DTNJNQ]

Andrew - How much do the Riss Racing down pipes cost installed?

[Zuzu]

I spoke with Andrew today and the pricing hasnt been finalised yet.

[WAY]

I thought RR said they are sending some stock to Andrew? I guess this means there will be local stock soon for my business partner's 135i when that lobs in the country...

[DTNJNQ]

Originally Posted by WAY

I should have done a 0-200 on my GPS device previously and do it again now.

Wayne, what GPS performance measuring device do you have?

[WAY]

I just have a 5ghz GPS unit that I couple up with race chrono and Nokia phone. Brilliant little software!

[andrew@southernBM]

The initial shipment will be here very soon, so then i can modify them and have them ceramic coated. When this is taken care of, they i can set the prices and will be sure to let you all know when they are available.

Thanks again

Andrew

[andrew@southernBM]

More photos and some dyno videos are here

Another 135i AW with coral, images here

[AussieRacer]

My internet connection is back to normal so I finally had a look at those graphs. I'd say with 100% confidence we are talking different gears with those peaks.

Looking at the post DP install graph first. If you look at the x-axis (rolling speed) you'll see there are two runs - either a 3rd and 4th gear run, or 4th and 5th gear - on the post DP install dyno graph.

Now since dynos have no idea about revs, you really are measuring road speed. So if you compare it to the stock dyno run graph (unfortunately using a different y-axis scale):

you can see the it is the right (or red coloured) run in the top graph that was done in the same gear as the stock run (bottom graph).

And it might be my eyes, but stock produced a slight higher peak....
Now of course Andrew has stated there were many days in between and there are so many variables, what these graphs do say is this particular install of downpipes yielded no peak gains.

However if I stare even closer I CAN see there is a slight increase in the mid-range (no doubt when boost is at its peak). If the graphs were the same scale it would become clearer there is more power through the rev range, but just not a bigger peak......

Unfortunately the torque scale on the right has been chopped, so no idea which one delivered more.

Of course happy to be proven wrong if I've missed something obvious.

[andrew@southernBM]

I can 100% attest to the fact it is the same gear, 4th gear. I had a my business partner in the car while it was being dyno'd. I spoke to the owner before the first dyno stating what i wanted. I will double check the variables that Kris asked about, tomorrow. I will double check all the raw data and let you know. I have no reason to make up data results. I test so many different products and most are rubbish. This made power, drive it and you can tell, no doubt about it.

I'll be back to you!:thumbup:

[Kris]

The operator should be able to provide this kind of info:

ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
º A.L.S. PERFORMANCE º
º Dyno Dynamics Chassis Dynamometer. º
ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ

******** Dyno Detail File : C:\DYNO\SNAP\KK1180.TXT **********
Customer :Kris K
Details :135
I.D. :KK1180
10:30:16 14-05-2008

ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
º Speed Power Tractive Ignition Temp Air/Fuel Vacuum º
º KPH kW N AIR øC Petrol (Abs) º
ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
Ramp-Up : Rate = 7

Graph File :KK1180.001
Description: 135
ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
º Speed Power Tractive Ignition Temp Air/Fuel Vacuum º
º KPH kW N AIR øC Petrol (Abs) º
ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
70 71 3637 0 11.7 14.7 105.00 kPa
75 75 3606 0 11.7 14.7 104.90 kPa
80 82 3688 0 11.7 14.6 104.90 kPa
85 84 3574 0 11.7 14.5 104.90 kPa
90 89 3570 0 11.7 14.4 104.90 kPa
95 92 3489 0 11.7 14.4 104.90 kPa
100 98 3510 0 11.7 14.4 104.90 kPa
105 103 3527 0 11.7 14.4 104.90 kPa
110 107 3487 0 11.7 14.4 104.90 kPa
115 111 3487 0 11.7 14.4 104.90 kPa
120 116 3483 0 11.7 14.4 104.90 kPa
125 119 3438 0 11.7 14.4 104.90 kPa
130 121 3362 0 11.7 14.4 104.90 kPa
135 123 3291 0 11.7 14.2 104.90 kPa
140 125 3213 0 11.7 14.1 104.90 kPa
145 131 3253 0 11.7 14.1 104.90 kPa

[AussieRacer]

Andrew, does the first graph above include the original dyno run (red line) and then the post-DP install dyno run as an overlay? Meaning only one graphed run per dyno session. If that's the case, the extra peak HP claims may be true, but still doesn't explain why the runs weren't done in the same gear to give a proper engine power comparison. Obviously how an engine can spin up its running gear differs from gear to gear.

When I do dyno runs (also on a Dyno Dynamics) comparing different gear runs is useless. In fact I personally tend to focus on steady state speeds in the same gear (eg. 70, 85, 100, 120km/h) so you can more accurately chase gains across the rev range under constant load WOT, not just at peaks. But then for me I care about EVERY single hp

Don't doubt you've been told it was the same gear, and I especially don't doubt that the car would accelerate quicker by having more power across the rev range, but unless WAY had his gearing changed, the top speed reached in each run should be identical....

[WAY]

Nope, no gearing changes at all. I am curious to understand what went on as well. As I said, there is no doubt by driving it that the car is making heaps more torque and power. It's one of those mods that it is so obvious without needing to see the graphs to know! But still, would be great to know what the scientific numbers actually tell you!

[andrew@southernBM]

Originally Posted by AussieRacer

Andrew, does the first graph above include the original dyno run (red line) and then the post-DP install dyno run as an overlay? Meaning only one graphed run per dyno session. If that's the case, the extra peak HP claims may be true, but still doesn't explain why the runs weren't done in the same gear to give a proper engine power comparison. Obviously how an engine can spin up its running gear differs from gear to gear.

When I do dyno runs (also on a Dyno Dynamics) comparing different gear runs is useless. In fact I personally tend to focus on steady state speeds in the same gear (eg. 70, 85, 100, 120km/h) so you can more accurately chase gains across the rev range under constant load WOT, not just at peaks. But then for me I care about EVERY single hp

Don't doubt you've been told it was the same gear, and I especially don't doubt that the car would accelerate quicker by having more power across the rev range, but unless WAY had his gearing changed, the top speed reached in each run should be identical....

Ahh, i see your point, good one. I'm on the phone to him now, to get all the other print outs.

He's going to ring dyno dyanmics and ask them directly.

He said defiantly 4th gear both. i asked him your point.....

Can you PM me your mobile number i'd like to get this sorted asap, and your obvious experience will help me get this sorted quickly.

He has offered another dyno run again in 4th gear and i can video the fact, but it doesn't really answer your question does it?

I hope to hear from you soon.

Kris, the other data is available, i'll pick them up this morning

Thanks

Andrew

[Kris]

Thanks Andrew!!

[andrew@southernBM]

Dyno dynamics think it may be wheel spin?

It was wet that day, they have asked us to re-dyno and compare results, i'll ask the owner and get back to you guys asap

[AussieRacer]

Mobile number PM'd :smile: