Send a flame arrestor too tim, see what happens in as run condition!

Shipping now, just printed label off... I hope my carbs are not junk lol

Speaking of flame arresters...I think you will be shocked at what you see there, just for grins Smitty try a pull with just a good air filer base that has a nice flow to it, that should give you your base line, as that should be worth power over nothing at all...

Vintage Chromoly rob didn't lose but maybe 1-2 hp with and without arrestor.

Made little if any difference on mine with the 4500

I remember mike tkach dynoing his 1200hp whippled 588, with and without the flame arrestors, and it wasnt a change. Maybe a couple two three, but nothing noteable. Dual carb style flame arrestor. Not the lame ones with the KN style filters.

I noticed a decline in performance when I took the spark arrestor off at the lake. It seemed like just a little bit of resistance is good to straighten out the air.

I think we lost 4 hp with a 14x4 marine K&N flame arrestor

can,t remember for sure but i am thinking less than 10.

My 14 by 4 K&N only lost 2 or 3 HP over the dyno air flow hat.

I'd have to look at the sheet, but iit was insignificant.