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Air filter size

K

Keeth1123

Well-known member
What size air filter is everyone running on a SBC setup? Also, what do you have for rain protection or cover.
 
Keeth1123 said:
What size air filter is everyone running on a SBC setup? Also, what do you have for rain protection or cover.
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Go on YouTube n search air filters on dynos n u will see what 1 u want.. remember all a engine is ...is an air pump it wants air... I use 14x4 K&N with a filterwear cover I dont run in the rain but if I get caught in it I wait or if it's not to bad the filterwear will keep the rain out my breather nut has a rubber seal rain covers are silly looking to me imo 20190413_174233.jpg

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Gotta be ready for anything DoDo

I tell Mr Branch to treat it like its an airplane. I have been out off the coast in the fall run net fishing and the wind and tide converge. Having to get us back across those open cuts between barrier islands if you drop power you gonna sink. We went to a fully enclosed Spectre air filter housing that also has 2 ram air style snorkels'. It uses a washable element, filters the air good and has proven effective in heavy weather.

If it is really bad and we have to push thru it I can even reach back and face the snorkel's to the rear to minimize water entry. The base has a small seam that prevents pooling and so far so good. I would recommend it.

About 5 years back met a young man (Ox Box folks) who had a hot car motor boat. He explained to me that they were having trouble with a conventional open filter pulling fuel out of the carb at high speed. They had fashioned a partially closed system to prevent that from happening. After running my boat I noticed a fuel film on the prop and discovered my boat was pulling fuel also so we went to a closed system first a Spectra dual rams horn style then later the current top mounted dual snorkel.
 

14" Snorkel Air Boxes

Factory direct Spectre replacement air filters, and cold air intake systems.
www.spectreperformance.com www.spectreperformance.com

Use the standard height NOT LOW PROFILE if your engine is 350 inch or larger.

14_snorkle_air_boxes.jpg


14_snorkle_air_boxes.jpg
 
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Krahammer your set up is the actual proper (USCG) standard for an inboard marine application, my issue is it offers no real degree of particulate filtration. The Spectre uses a washable filter just like a K&N and it does a good job for us. We run dry a lot being out on night rides and the amount of bugs and dirt it traps we would not want going into the cylinders.

Back in the late 1960s the performance cars were being built with Ram Air, Cowl Induction and Shaker Scoops for a reason. The speed or pressure of air being captured in a closed ducted system acts much like added "boost" that a supercharger adds. Now this was a very slight amount of pressure and higher speeds are where this works but to gain performance at zero cost is a win in any application.
 
We run a "Cadillac batwing" style cleaner on my Son's small block. Should he get caught in the rain, he can just spin the air cleaner 180 degrees so the intake duct faces the back. Not the best setup, but works fine.

http://www.acedux.com/assets/product-images/107445/900.jpg
 
Velocity stack. Tarp and bungies stay in the boat. On the trailer, I cover the motor, and then the whole metalwork from cage to gas pedal.
 
SWAMPHUNTER45 said:
Gotta be ready for anything DoDo

I tell Mr Branch to treat it like its an airplane. I have been out off the coast in the fall run net fishing and the wind and tide converge. Having to get us back across those open cuts between barrier islands if you drop power you gonna sink. We went to a fully enclosed Spectre air filter housing that also has 2 ram air style snorkels'. It uses a washable element, filters the air good and has proven effective in heavy weather.

If it is really bad and we have to push thru it I can even reach back and face the snorkel's to the rear to minimize water entry. The base has a small seam that prevents pooling and so far so good. I would recommend it.

About 5 years back met a young man (Ox Box folks) who had a hot car motor boat. He explained to me that they were having trouble with a conventional open filter pulling fuel out of the carb at high speed. They had fashioned a partially closed system to prevent that from happening. After running my boat I noticed a fuel film on the prop and discovered my boat was pulling fuel also so we went to a closed system first a Spectra dual rams horn style then later the current top mounted dual snorkel.
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Hey Swamphunter. Anyway you can send a pic of your air filter set up with the spectre housing and snorkels? This sounds like the set up I’m interested in just wanting to get a visual. Thank you!
 
MRuss said:
Hey Swamphunter. Anyway you can send a pic of your air filter set up with the spectre housing and snorkels? This sounds like the set up I’m interested in just wanting to get a visual. Thank you!
Click to expand...
This is what I’m running on my new set up. I imagine pretty similar to what swamp was describing
01AA4B43-5962-4C30-A465-822D14BA343A.jpeg
 
Coastslider said:
This is what I’m running on my new set up. I imagine pretty similar to what swamp was describing
View attachment 98123
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I wanted to mention something to consider if your filters will be in the back near the prop as in the pic - the suction created from the prop may draw fuel from the carb under heavy load / high speed. This is what I'm looking to resolve on my boat and why I was inquiring - thanks again.
 
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