Imco Shorties on single 29 Scarab?

custom29scarab · 05-21-2008, 03:57 PM

Any one try a imco shortie on their 29 scarab? I am running mid 70's with a bravo one and a 26p bravo 1. What will I gain if anything with the shortie? What prop would I want with the loss of bow lift from the shortie? Any help or experieince would be great.

zul36 · 05-22-2008, 01:09 AM

Quote:

Originally Posted by custom29scarab

Any one try a imco shortie on their 29 scarab? I am running mid 70's with a bravo one and a 26p bravo 1. What will I gain if anything with the shortie? What prop would I want with the loss of bow lift from the shortie? Any help or experieince would be great.

I have a 2" shortie on my 29 with a 496ho. I only do about 57 MPH on GPS. I have no clue how fast other 29's do with the regular drive. However, on the stock speedo (Not GPS), it would give me a reading of 60, but when I did the Shortie I also did the GPS speedo. So I'm not sure if it truly made a difference.

custom29scarab · 05-22-2008, 08:04 AM

Thanks for the response. I can't decide to spend the cash or not. From what I have heard you don't really gain much unless you are over 80 with a shortie????

zul36 · 05-22-2008, 01:40 PM

Quote:

Originally Posted by custom29scarab

Thanks for the response. I can't decide to spend the cash or not. From what I have heard you don't really gain much unless you are over 80 with a shortie????

Have you tried a five blade prop?

custom29scarab · 05-22-2008, 05:13 PM

No I haven't. Only the bravo 26p since the build.

fast22 · 05-22-2008, 08:05 PM

I have been told by quite a few people in the know that our boats would respond well to the shorty as far as speed, but Ive never talked to anynone who actually tried it on a 29' with bigger power. I'm guessing your running at least 600+ due to your speed with the 26p so getting your lift back shouldn't be too hard. As far as not helping till 80mph, I'm not sure. I know its true with a just nose cone cause anything under 75 and you could actually put down force on the boat as you trim up, I know I picked up speed when I took mine off. But the shorty should improve the overall X-dimension.

custom29scarab · 05-22-2008, 10:40 PM

great info fast22. I am making 625 on the dyno and am trying to push it to 80. I am a solid 72 almost every day and 74 with1/2 tank 2 people in cool weather. I have now heard from 3 people that a shortie on my set up 29 single change in the X dimension would be an improvement speed wise. I guess I will start looking for one now.

custom29scarab · 05-22-2008, 10:42 PM

Now for a prop what would I start with? Could I try the bravo 26p that is getting labbed as I type at Throttle Up or will I need a different prop for the imco?

fast22 · 05-22-2008, 11:27 PM

Not sure if the prop will work, It would be a good place to start but I think alot of the shorties come with the 1 1/4" propshaft, although I could be wrong. You may have to move up in pitch cause the new x-dimension may create more slip since it will be closer to the surface and could airate a little more. As for the type you would definetley want to stay with either a bravo or a hydromotive round ear for bowlift. I think the cleaver type will create sternlift. I'mvery interested in what youfind. I have a 12" stellings box set at nuetral wich do to the extra length actually puts the drive lower than stock. I'm making right about 620@5300 with 5lbs of boost, slightly worked 26p bravo and on GPS I'm getting 72 on a 1/2 tank and 2 people, and I can get 68-69 fully loaded.
Scott

custom29scarab · 05-23-2008, 08:01 AM

WOW almost the exact setup I am running. 509 with a B&M 250 making just under 5lbs of boost. I could only turn the prop about 5050-5100 last year but I had a slight ding in the prop after my 2nd run

I tried to get my hands on a few others to try but for one reason or another never hooked up with them. I will be sure to keep you posted especially if I get an Imco lower.