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  #1  
Old 13-10-2017, 12:25 PM
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Frank351 Frank351 is offline
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Looking for that 3 extra HP from your BBC ... look no further ...



Yep ... its a salad bowl with the bottom cut of it and one of those K&N 14" air cleaner lids on it.

Taken from the latest episode of Engine Masters on the Motor Trend Channel.

They compared 19 different styles of aircleaner over an open carb. Interesting results.

p.s. Apologies its not a video, just the screen grab happens to have the play button there.
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1970 Ford Mustang Sportsroof 302W/Toploader
1970 EL Camino 350/TH350 - The FrankenUte
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  #2  
Old 14-10-2017, 01:01 PM
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RAW454 RAW454 is offline
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Classic. Is this the first time The Simpsons did NOT predict the future correcty?

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(I guess it makes sense and shows why people with modern cars are generally better with the factory 'airbox' than just bolting on a cone filter...)
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Old 14-10-2017, 04:01 PM
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Ive got one of them bowls time to unleash the beast
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Old 14-10-2017, 06:24 PM
imamutant imamutant is offline
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Whats the margin of error on that dyno though?
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Old 14-10-2017, 09:57 PM
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sar4890 sar4890 is offline
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Might depend on the salad dressing in the bowl. I will play it safe and use american dressing
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  #6  
Old 15-10-2017, 08:36 AM
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Quote:
Originally Posted by imamutant View Post
Whats the margin of error on that dyno though?
Yeah, well I suppose you have to take it with a grain of salt but the test was interesting to compare all the different types- 19 in all.

For those of you that used to turn the lid upside upside down on your factory air cleaners , that actually made a huge positive difference.

Also it seems to be a lot better to have the air coming in from the top ie. like a velocity stack rather than the sides and having to make a 90 degree turn like most air cleaners.

The vid will be free to watch on YouTube in about 4 weeks.
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1970 Ford Mustang Sportsroof 302W/Toploader
1970 EL Camino 350/TH350 - The FrankenUte
2006 Jeep SRT8 - Big dumb US fun.
2007 FPV Force6 - Wife's car
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Old 15-10-2017, 10:39 AM
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God dammit Frank!

I got all excited. Thought we finally had video embedding added.

Friday 13th brought the evil out in you
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  #8  
Old 15-10-2017, 08:11 PM
Geoff 4 Geoff 4 is offline
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What I find strange is that the air flow area [ lid section only ] defeats K&Ns own formula for determining minimum area of the filter for the engine's output.
That small area of the lid filter would be expected to choke air flow, reduce HP....but then again, this test was done in the USA....
Using the K&N formula, a 454 @ 6000 rpm needs a K&N filer area over 130 sq in.
Bigger than 454, more rpm, more filter area reqd.
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Old 16-10-2017, 09:10 AM
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Well interesting you should say that as this was another test :



and the results were that taping up the sides made bugger all difference - so which tells me that when you have one of the filter lid jobbies most of the air comes from the top.
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1970 Ford Mustang Sportsroof 302W/Toploader
1970 EL Camino 350/TH350 - The FrankenUte
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Old 16-10-2017, 11:56 AM
69JavelinMan 69JavelinMan is offline
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That is interesting because there was a school of thought that those filter tops increased turbulence above the carb and maybe cost power, would seem that is not the case.

---------- Post added at 09:56 AM ---------- Previous post was at 09:50 AM ----------

Did they test the thermocharger:

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Old 16-10-2017, 02:54 PM
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Nah, they didn't test the thermocharger ... looks interesting ...

I think the turbulence or lack of it may depend on the type of filter. For example the ones most old school velocity stacks use do restrict the flow. It was only after they removed the filters that they actually saw an small increase over carby with no filter at all.
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1970 Ford Mustang Sportsroof 302W/Toploader
1970 EL Camino 350/TH350 - The FrankenUte
2006 Jeep SRT8 - Big dumb US fun.
2007 FPV Force6 - Wife's car
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Old 16-10-2017, 07:11 PM
Geoff 4 Geoff 4 is offline
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..or maybe the K&N formula for calculating reqd filter area is.....simply wrong.

And it is not just the airflow [ cfm ] that can affect the final hp . Booster buffeting, disturbance of air above the bowl vents can have an impact on the F/A ratio, affects final output.
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  #13  
Old 18-10-2017, 08:51 AM
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Originally Posted by Russ View Post
God dammit Frank!

I got all excited. Thought we finally had video embedding added.

Friday 13th brought the evil out in you
Sorry Russ ... Didn't even realise it was the 13th
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Frank.

1970 Ford Mustang Sportsroof 302W/Toploader
1970 EL Camino 350/TH350 - The FrankenUte
2006 Jeep SRT8 - Big dumb US fun.
2007 FPV Force6 - Wife's car
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Old 18-10-2017, 05:29 PM
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So in a nutshell would a vehicle with cowl induction ie a corvette for example benefit from an aircleaner filter on the top?
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  #15  
Old 18-10-2017, 06:56 PM
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Quote:
Originally Posted by sar4890 View Post
So in a nutshell would a vehicle with cowl induction ie a corvette for example benefit from an aircleaner filter on the top?
Well the test was fairly comprehensive testing 19 different types of air filters and configs. They also took the dyno graph results so they could tell as what HP number and RPM the filter started beconing a restriction and hurting power (some like the salad bowl added power) . The max power of their BBC was around 750 HP . Also a drop base lost HP vs. flat base for a normal style 14" air cleaner. The taped air filter with the filter actually was better than the same thing but untaped ...a weird result.

Another screen shot :



So from those results you are only better off if you have a flat base and tape the filter leaving only the lid open. Weird.

A 14 inch by 4 inch high K&N was better again but only by 1HP or so, so based on the MT video I would go for the 14 inch by 4 inch high K&N assuming the cowl is high enough.
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1970 Ford Mustang Sportsroof 302W/Toploader
1970 EL Camino 350/TH350 - The FrankenUte
2006 Jeep SRT8 - Big dumb US fun.
2007 FPV Force6 - Wife's car
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