I hear you on the dyno comment. He had better luck wirh the comp springs than the manleys because the comps would sag where the manleys would snap....a very bad thing indeed. A drag racing friend of mine has experienced the same thing with his 10,500 rpm small block ford.

Not to change the subject but how come there isn't vacuum pumps used on boat motors? I saw 40hp go away on Pat Musi's dyno because of the crankcase vacuum sucked the pan gasket in due to a POS oil pan.

I think because most boaters don't turn enough rpms to really see the benefit. Plus its just more stuff to maintain. That's why I chose not to go that route anyway.

I have a jet boat with a 454 single carb with me switching to a tunnel ram with a dual carb set up make much of a difference? Please help I may be purchasing today should I not waste my money he wants $1000 for the set up

An old thread but that’s what their for. Much of it depends on your tune/combo. If I had to guess in a boat app with all optimum components you’d probably gain 50 hp + - at 6,200-6,600 over a good SP intake carb/efi set up. Equate that to speed 3-4 mph + -

What heads, intake, carb currently and what TR you looking at? I’d only consider dart.

Actually thanks for bringing up an old, entertaining thread! Lots of names from the past. Can't answer your question though.

Been running 8-71's and 10-71's on Darts for 10 years or so. Motors seem to really like the port flow above 3800. You pick up a cooling effect from surface area of aluminum in TR. They do very well mid range and up on a dyno compared to a typical blower intake and even compared to an intercooler unless you are really cranking up the boost. KE can get you the adapters.