Walnut blasting dyno results

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I work at a tuning company and also do some specialist things like DSG diagnosis/repairs, DPF cleaning( not the cheap way but the good way ), DPF removals, tranny flushes and intake cleaning.

Wanted to share this walnut blasting cleaning with you guys. I'ts my dads car, recently bought. '08 Mini clubman john cooper works 211hp. 1.6 direct injected turbocharged engine.

When i drove it i felt like it was holding back, hesitating and not delivering power.

I have put the car on our superflow 4x4 dyno and measured. Then cleaned the valves using our walnut blasting tool and after that used the tunap valve clean spray with running engine.

Let these results speak for themselves

Black lines stock before valve cleaning. Red lines after cleaning







Stock with dirty valves 191 hp
Stock with cleaned valves 211 hp ( exactly as per manufacterer! )

Testdrive after cleaning also confirmed a drive without hesitation and improved performance.
 
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@javacontour
Yes, and also notice the curve being more straight with a lot less pikes in the high rpm area.
 
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Thanks for doing this and sharing the results! I've been worried about build up on my GTI. It looks like catch cans reduce the problem somewhat, but not all together. And good cans for some of these cars are so expensive you might as well just drive it until it needs a cleaning.

That power number is also great, seeing the rated number at the wheels is always good. Is that torque number ft/lbs?
 
@reddy45
Yes you vacuum it out during the blasting. Special adapters make you vacuum and clean during the same time.

@hemihawk
In europe we always talk about crank HP. These figures are crank hp and Nm. We first do a drivetrain loss measurement in the gear that we are going to use to measure te power ( 4th gear most of the times )

So its exactly 211 crank hp's and converter to lb ft its around 224 crank lb ft.
 
Interesting. 20hp loss, or 9%. That's a lot of crud. I suspect 9% is a detectable seat of the pants measurement

I know every engine design is different. Is it a linear loss? as in, different engine with half that crud, is it 5% loss?
 
I dont think the loss is linear. I think it it doesnt lose much power in the first build up phase. But seeing the valves like this i think a little more buildup would cause the engine not to deliver any decent power anymore.

Mostly you can feel that the engine is running right. Pulling strong and linear without shocks and hesitation.

Ofcourse we have tuned the engine after all of this was done. 228 hp and 350 nm if the best we got out of this engine in complete stock form.
 
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That's nuts (pardon the pun).

And this is why some people seem to have at least a somewhat rational concern about DI. Not a problem on port injection applications.
 
Another reason I like the dual systems that have both Port and Direct Injection (ECU moves between the two depending on load/mode, etc.).
At least in this type of engine, the use of fuel tank based cleaners (and just running good Top Tier Gas) can keep the intake valves decently clean.
 
That's quite an improvement. A walnut blaster that incorporates a shop vac is fairly easy to make from cheap HF stuff, they even have the shells.
 
Originally Posted By: OVERKILL


And this is why some people seem to have at least a somewhat rational concern about DI. Not a problem on port injection applications.


My thoughts exactly.
 
Looks like the nuts did the job. As for DI here, early Mini such as topic 08 and similar age Audis considered a couple "early adopters", and have a rep for excessive IV deposits.
 
Buy a new car that's more efficient and powerful thanks to the technology of direct injection... for the first 30,000 miles.
 
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