F-2 Speedy

iTrader: (6)

that will be a drive breaker for sure, unless its a SCX

SR24Dave

Has anyone taken a SCX and had it REM polished and cyro treated?
Or do they come that way?
just curious.

SR24Dave

My thought is that if they are that good to start, wouldn't this process make them even better?

Griff

Will need high octane fuel. Less longevity, more potential for failures and will push your drive beyond its limits.

JohanSweden

Thanks for your advice guys, maybe the XR will handle it but eventually not the X upper.. hmm. The 540 has ben running with XR setup in many years without drive failure.
Maybe he was lucky.

Here in Sweden we have 95 octane gas as standard, and also 98 high octane so that eint no problem if running with the 98 octane.

JohanSweden

Is there any calculation on what speed I can expect with procharged 540 bulldog 770hp?

Now I have top speed at 52 mph @ 4750rpm with my 425hp merc 496.

Someone said like 25-30hp is like 1-2mph gain.
Would be nice to get some higher cruising speed.

sutphen 30

if you have a bravo,,top speed will be what ever the tow boat has.

Griff

Keep in mind that European octane ratings are calculated differently from American octane ratings.
95 EU = 90 US and 98 EU = 93 US

Griff

Approx 15hp for every 1 mph gain for where you are at, but its not linear. If you started at 75mph, it might take 25 hp to gain 1mph

JohanSweden

Every day I learn something new, thank you Griff. Didnt know that

So approx 25 mph gain from 425hp to 770hp?