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      08-12-2009, 01:37 PM   #23
acuteperformance
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yes, you'll just have to pay for actual shipping costs. i believe it's $45 for UPS.

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Originally Posted by MIKEYBMW1 View Post
can I get these in the UK?

michael.
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      08-12-2009, 05:08 PM   #24
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I picked up a set from Eloy a few weeks back and got to check out his operation. Hes a really cool dude that really knows his shit.

I have not installed the scoops yet because my cars been in the shop for a while but I got it back yesterday and I'll be putting them in shortly. I'll post my experience with them
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      08-12-2009, 10:41 PM   #25
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Quote:
Originally Posted by endofanera7 View Post
you have a nice stable of cars buddy! Very tastefully modded too.

Sorry to go off topic, regarding the RPi, I feel a lil regret selling mine. Will be getting another set soon, in different color of course!
+1, for the first part at least (not to go too off topic myself either). And you had an M6 in the past!
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      09-01-2009, 04:36 AM   #26
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Quote:
Originally Posted by SenorFunkyPants View Post
Hmm I've seen other comprehensive dyno tests of these scoops that showed absolutely no gain whatsoever.
But as snake oil goes it not too expensive.
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Originally Posted by acuteperformance View Post
Do you happen to know where? I'd love to take a look.

Michael
Acute Performance
Excuse the delay in replying:

"Experiment :
To see if Rpi Scoops;
- Help lower intake temperatures
- Help engine consume more air
- Help with airflow
- Help with power

Test 1:

Using fan with approx wind speed of 90-100mph directed straight at front kidney grills with and without scoops.

To test if any change in air mass sensor readings in kg/h over a period of 2 mins under static full load @ 3100rpm.

Result:

Average consumption of air increased by 0.5 kg/h with scoops. This basically means the scoops don't create an effect where any additional air, or anything that can be called even close to minute, is forced into the engine. The air mass meter readings clearly tell us this.

Test 2 (done in conjuction with Test 1)

To see if Rpi scoops lower air intake temperatures AND if they allow temperatures to fall faster from 41 over a 2 min time span under full load @ 3100 rpm

Result:

No reduction in air intake temperature over a 2 min period. Air intake temperatures not falling any faster.

Test 3 - Full Power Dyno run

Result - zero difference accross the entire rpm range. With and without scoops overlay each other perfectly. Even the fuelling is exactly the same.

Conclusion:

The scoops do absoltely nothing whatso ever. Air mass meter readings don't change, air intake temperatures don't change, fuelling is exactly the same.
The engine is consuming the exact same amount of air as per the air flow sensor.

I have one further test to do and I'll do it on the way home - data log the average intake temperature with and without scoops (25 miles each). All A road and motorway driving.

If anyone wants the dyno charts or excel sheet with the logs on there please do not hesitate to contact me.

Finally, we already knew these things don't work because of how effective the factory airbox is and how well it flows.

Just have a think about this and I'll put it in very basic terms.

This engine has the capacity to 'suck' as much as 1000 kg (without even thinking about it) of air per hour. Do you really think your going to force feed it anymore with a bit of air pressure?
The standard factory airbox already has external air feeds and it's a well pressurised system. How much more pressure would you require to actually increase to a level where it's forced in?"

"Back to the scoops. Just delivered the car back to the customer with all of the datalogs represented in excel.
He is not happy and wanted to see the data for himself so I've just come back from 1.5 hours with of road driving with him recording differences in temperatures and air mass readings with and without the scoops. Not surprisingly, the road data matches up to the dyno data quite well but the on road testing clearly shows coolant temperatures to be affected more.

Some information that shocked me though - the difference between ambient and intake temperatures are larger on the road than on the dyno.
On road the difference is always 7+ degrees even at xxx+ speeds.
On the dyno the intake temps are only 3-4 degrees higher than the ambient."
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      09-01-2009, 06:15 AM   #27
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Weird, I did the dyno test with them before and after. I gained 7whp above 7k rpm, and 14wtq from 2400-3600rpm on a dyno dynamics.
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      09-02-2009, 12:40 AM   #28
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If you guys knew Eloy, he wouldn't put his name on it if it does not make power.

The scoops were made off my car, I put well over 5k on my car and had to dyno every damn week!

Best bang for the buck.
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      09-02-2009, 01:52 AM   #29
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Well...

Quote:
Originally Posted by SenorFunkyPants View Post
Excuse the delay in replying:

"Experiment :
To see if Rpi Scoops;
- Help lower intake temperatures
- Help engine consume more air
- Help with airflow
- Help with power


Some information that shocked me though - the difference between ambient and intake temperatures are larger on the road than on the dyno.
On road the difference is always 7+ degrees even at xxx+ speeds.
On the dyno the intake temps are only 3-4 degrees higher than the ambient."
Your opinion is noted. There are many of us on these forums who have independently tested our own cars and seen others that showed a positive gain on a Dyno Dynamic's machine.

I am sure we could all run multiple Dyno tests and all come up with different measurements/readings.

As many have already stated, for $100 the "butt dyno" feel out performs the cost.
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      09-02-2009, 04:03 AM   #30
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As you say its a low price so even if there is no benefit you haven't lost much....its the sort of part I would have fitted to my car in my younger days.
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      09-02-2009, 10:24 AM   #31
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I personally witnessed a before and after dyno of two of my cars on the same day (M6 and M3) there are gains... Must be the old english air

While the gains are minimal, its incremental hp; couple the scoops with filters plus a pulley and you got yourself some decent whp gains for cheap money IMHO.

No one should ever hope that scoops alone will be end all to mods but dollar per hp the value is seriously strong.
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