Ok so I have just purchased '89 SR1 292 with 454 mags. Engines are fresh with comp cams. compression tested almost dead even 170psi on every cylinder, a couple were 165 and a couple were 175. Anyways I checked base timing is set at 8degrees at 800rpm. and I'm getting wot on the carbs. I first tried 24pitch 4 blade bravo 1's and 60-62mph at 4500 rpms. Today I tried 22pitch 4 blade bravo 1's and 60mph at 4900rpms. What gives? Brochure says 66mph with stock 23p 3 blade mirages. Also this is at LOTO. Also new cap, rotor, plugs, wires, and fluids.

Just wondering if the 4 blade prop isn't fighting me with too much lift. I have the trim all the way up and it feels that it could benefit from more. Just thinking that maybe formula had it right with the 23p 3blade mirage. unfortunately I bought the boat with one 25p mirage and one 25p quicksliver. ..... please help !!

The four blades will typically be slower on the older Formula hull. State of the art technology back then was a clever prop You may actually see a higher top speed with the three blades on it, but cruise and mileage will suffer. Also in 89 they didn't have GPS speedos so that number is probably from a dreamometer which tended to run 3-5 moh faster than true radar or GPS.

jg1000 - have similar setup and hoping getting my bravo's 1 labbed with BBlades witch bring the max out of the boat. I plan to advance timing while using 93 pump gas too, though dont have the Mags. mike

All of this data is with gps.... what is everyone else getting with their 292 non stepped hulls?

did you purchase that boat from glencove marina?

I've got a 1990 292 Sr1 mags stock 23 mirage she does 65 seen 67 a few times

A good friend of mine has a 1990 292 with fresh 454 mags, his does 60 most of the time, I think he has seen 62 a couple of times. It has Mirage 3 blades.

I didnt buy this from glencove. now for the last two comments how does the same boat differ 5mph ?!? thats a big power difference. maybe the difference between salt water and fresh water? does anyone ever trim the 3 blade props to get more rpms?

My '89 311 with mags will do 67 mph (GPS) with Bravo 1 26 pitch props, and 68 with 25 pitch Mirages (not Plus). Motors are stock except for Gil Offshore exhaust. If your not making the speed you are not making the horsepower.