I believe ya, just tryn to get a rise out of these guys but you won't convince me that a stock honda civic with a 4 inch tip sounds good.  As a joke in high scool I took my Dads old retired 88 Dodge colt, cut the muffler off stung a straight pipe with a resonator on.  It wasn't fast because I didn't have all the bolt on primered ground effects like the other guys.


In my high school "Fast in the furious" was a lifestyle for some, or so they would have liked you to believe.

That would probably be right for Daves JR drive, I still go the jr Intake that came out of my lil boat sittin arround somewhere not sure what i'll ever do with it.

thats cool I like thinkin outside the box.  I have no knowledge of the chevy just the prob the guy was having with the rotory(rpm wise).  Maybe if you stuck two of those 4's side by side with a cross pipe it would sound desent

Don't forget were talking about jet boats here not cars with 3.50 rear end gears.  An A impeller only absorbs 150hp at 3600 RPMs, so even if the rect ports don't have the best port velocity or torque on the low end, It doesnt take much.  the most common complaint I get with rect port heads is that there a hesitation or poor throttle response (usually in conjucntion with a single plane intake), but most if not all that can be taken care of with carburetor and correct tuning.  My .02 you can easilly tune rect ports for the low end, but you have to work harder on ovals for the top end

Here are some old pictures, and as soon as I get around to my mill work I'll have a new pic soon.  I'm missing about 4 different pictures/setups in between

Great lookin boat there Josh. Nice and clean, I like that.  Your boat gives me something to aspire to.

Thanks for the kind words, on another note (ie your other thread) I wouldnt add 200 extra pounds of big block to this boat or yours for the world.  Loosing my 150 Pound pasenger made the difference in 3 MPH on my top end.

I wouldnt do that just yet (lower it), the weight of the boat and massive motor will probably lower it just right.  Looking good John , keep it up!

especially with all the arthritis, torn ligaments/tendons, compacted disks in my neck goes on and on.

guess I cant complain, except for the grey hairs that keep popping out from trying to potty train my lil girl

Is lobe seperation and lobe center the same thing?   I guess I'm cammed to the limit my seperation is 108*  and duration 232/242 at .050. No reversion yet.(knock on wood)

Intake lobe centre angle + exhaust lobe centre angle ÷ 2 = LSA

here ya go..... for about $1,000

Looks like a hookah

its desined to lookm like a FI hat, so yes no real functionallity.

From what I understand the smaller chambers act more like a fast burn head because of the compact chambers.  Typically you can run less timing or a little more compression seeing as they are not as prone to detonation compared to a dome piston and an open chamber head with the same CR.   Like they said above the flat top will have a more efficient burn, however the closed chambers shroud the valve (made worse by installing larger than factory valves) so the open chamber tend to flow a bit better. 

The nozzle adapter is much worse than even the early Dominators...