75hp Mer OpiMax vs. 75hp E-Tec

[BoatBuoy]

Re: 75hp Mer OpiMax vs. 75hp E-Tec

... with todays turbos there is no lag and you gain ALOT of power for very little added weight (would be a better setup than the Mercury Verado IMO).

Why not add a 6-71 type blower and burn nitrous oxide; or ether, castor oil, and alcohol? Man, talk about power. However, it's doubtful it'd run all day rigged like that, which is what an outboard is expected to do.

Typically, on a given engine, when output is increased, dependability is decreased. With outboards it's a fragile balance. If your car quits, you pull off of the road; if your outboard quits, just hope the currents don't carry you to Cuba.

 

[Rancherlee]

Re: 75hp Mer OpiMax vs. 75hp E-Tec

Why not add a 6-71 type blower and burn nitrous oxide; or ether, castor oil, and alcohol? Man, talk about power. However, it's doubtful it'd run all day rigged like that, which is what an outboard is expected to do.

Typically, on a given engine, when output is increased, dependability is decreased. With outboards it's a fragile balance. If your car quits, you pull off of the road; if your outboard quits, just hope the currents don't carry you to Cuba.

6-71 is heavy (this is mercury's approch with the supercharged verado) and nitrous needs a refill. Current 4 stroke outboard would need little to no modifications to run 7-8psi boost pressure off a turbo and be stone reliable. Drop the compression half a point and with 7-8psi boost it will still run on 87 octane. Actually a turbo outboard would be even more reliable than a turbo car engine due to the fact that you have an unlimited supply of cool water to keep everything happy. I think this is where the outboard market is going to head eventually, more power with a lighter engine. Right now there is no need since they are still selling a ton of heavy 4 stroke outboards and will be for a long time. Heck, Etec and Optimax are both closer to 4 stroke weight than they are to traditional carbed 2 strokes for wieght. I work on Turbo engines for a living, granted they are diesel but some of the generator sets I work on go 20,000 hours running 30+ psi of boost full load, only time there down is every 500 hours for an oil change.

 

[studlymandingo]

Say hello to Raul!

Say hello to Raul!

If your car quits, you pull off of the road; if your outboard quits, just hope the currents don't carry you to Cuba.

I have often wished I could visit Cuba!​