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how do you kill the lift in the cowl?

Bill, What model of Nova Rossi is that with the blue head?

So if I understand this right you can buy a Mac engine and have Mr. Brown do some tuning to the engine?

I will be interested in 2 weeks krpnova.PM me with contact info please.It looks like its the Mac for me.Does anybody know some setup info on the Mac such as head clearance and pipe length and somebody that does a little engine tuning?

This has turned out to be a very good discussion.If I did get a mac engine who would I send it to to be gone through?I never thought about the timing I assumed rb would change it for boat use but I doubt he did.Good call :P

I think increased port count helps with rpm on top end.Most of the killer on-raod engines have at least 7 ports not including the exhaust.I in fact wrote the port count wrong for the c5 it has 9 ports not including the 3 exhaust ports.I forgot what special word they called this particular...

he carries a wheelbarrel in his truck for those ba$$s! :P :lol: :D

I called precision boats and talked to a guy and he said that as long as the stroke matches between the nova and the c5 that the crank they make will fit so I looked and they both are 16.80 mm. I am having a hard time deciding between the c5 marine and the mac powerhead.I have seen where people...

thanks for the input fellas.I talked to Mitch Atwell and got all the info I needed.The place is just right down the road from me. :D

I don`t think its the same motor.The nova rossi has 9 ports and the C5 has 11.It may be a nova rossi based motor but the insides are different.

thanks

I live in jacksonville florida and was looking for a boat club that is nearby.I went to the IMPBA and looked under the club listings under district 3&4 but some of the listings are out of date.Can someone point me to a place or a person so I could do some racing?

From what I gather the new c5 has a carb designed specifically for marine use.It has a rotory carb,9mm throat,and the main needle has a servo arm so it acts as a 3rd channel mixer.I have read up on its cousin the c5 on-road and from what I gather this motor is awsome.You can read reviews about...

From what I gather the new c5 has a carb designed specifically for marine use.It has a rotory carb,9mm throat,and the main needle has a servo arm so it acts as a 3rd channel mixer.I have read up on its cousin the c5 on-road and from what I gather this motor is awsome.You can read reviews about...

yes it is big money but that might be a good thing for the saw racers if its heavy on the hp,and even for the mod class.

sweet...........so has anybody had any experience with this motor?

I was just cruising the internet and came across the new rb concepts c5 engine.I can`t find hp or rpm specs yet but it has the turbo head and turbo cut crank with..............drum roll...........11 ports,not to mention its also a long stroke.Man if I could find a pto for that engine put on a...

I am in jacksonville florida

I will take one at [email protected] on ms word

I was looking at the latest fuel prices and was wondering would it be more economical to mix your own and what are the proper steps to mix good fuel?