01scarab29

looking for prop information ,,, i have a 2001 29ft scarab twin 5.7's mpi ,,, wondering what max speed i should be able to run and a good cruzin'speed ,,, what's a good cruzin RPM to run?

Shag555

I would assume they are the 350 MAG MPI's, which is 300HP each, and you have a BravoI setup? I dont have the Scarab, so its not completely apples to apples, but my hardware is as above (ive got a 28zx). My props ar Mirage Plus 23's. I run 71mph with it. I would think your performance would be similar (or better) provided you have the 300hp motors.

Mariah212Z

IMO, I would say 66 or 67 mph Top Speed GPS.

dereknkathy

shag, what rpm's you turning. i have 350's with dart heads LT1 cams alum GLM exhausts. i hear the boat is good for 63 at 5200 rpm's. i haven't got it in water yet since i got it back. 23 mirage plus. alphas. 27 Nova III really a 26 with molded platform. doubt it could match your Donzi if everything else was equal...

Shag555

5100... Hitting the rev limiter in ecu. What Dart heads? Im looking for HP myself. Thinking of Dart Pro1's along with their single plane intake, set up for mpi.

dereknkathy

they are the cheapie Dart heads. 007 sportsmans with 76 cc chambers and 1.94 valves. and i just found one cracked when i took it to get a really bad valve guide done. i am stuck with an old spare pair of 624's for 1 motor for now. if spending good money, go aluminum. better everything plus another 100+ lbs out of the back of the boat..

01scarab29

hey guys ,,, have a little information, 2001 29ft scarab, twin 5.7's, bravo 1's, mirage plus 23's, 100gal tank,,, 2 people, 3/4 tank fuel, 4900rpm, wind just right 68mph GPS,,, run 65mph easily,,, I cruise 4000rpm, 55mph,,, been told PowerTech props are a very good choice, talked with them and was told they wouldn't change anything,,, said i'm buying spare set anyway what would you suggest ,,, they ask how it plans out, told them fine, it sometime trys to blow out, but very seldom he suggested OFX 3 blade 24p props ,,,,, wondering about 25p or OFX4 blade ,,, would like some input from ya'll ,, i know cars but just starting with boats

01scarab29

hey Shag555 ,,, is your speed GPS , most i get is 68,,, 65 all day,,, they are 300hp,,,

01scarab29

well i guess because i'm new in this, dont have tons of money to take the first advise i get,,,, i do like to hear from several people with first hand experience with there on boat,,,, thats what this forum is for ,, Right ? ,,,, thanks for ALL information and opinions

Shag555

This is about how my boat runs. I think once you gain some experience with it, youll figure it out, then you can start playing in modding it out. As I stated before, I'm in the same boat (just a different hull).