Hi all i know this has be brought up befor ,but i just removed my risers for the first time ,and was suprised how restricktive the tabulators were, i would like to leave them out and remove my internal flappers, as i all so have the external rubber ones on the tips . any idea how much free HP would be gained from this and how many of you 496ho owners have done this without trouble later on . my boat is allways put back on trailer and motors washed out on the boat ramp after every use, thru transom exhaust thanks for any help .

Happy new year to you all . regards paul

bob at full throttle marine has dyno results posted on this and proves it may gain you 10hp, excellent article on this and testing on diff exhaust systems as well

i'm going to remove mine this winter as well, but my boat is always kept in climate control year round, the turbulators are there for condensation in the risers from temp changes

I pulled mine out a few years ago. No issues. Deeper rumble. No noticeable power change.

8 hp on the dyno removing the turbulators.

Bob Lloyd
Full Throttle Marine

Anybody removed the turbulators on a procharged engine? Any water issues after removing?

496ho/whipple...turrbulators removed....not too many miles yet....no problem so far (stock cam)

Any noticable power increase?

I've removed them on a couple of my customers boats, and haven't noticed any difference in performance. I'm told it makes more power, but would probably only show up on a dyno. Merc must have thought there was a need for them, so i've always put them back!

can't tell....it was done same time as the whipple...power increase is.....

The guy i got the Procharger from said that he never saw any gains from removing them. The pc increase is great as well!