Imco -2 lower question
 

How manny rpm would you pick up wen u put on a -2 lower on a single 30 V bottom with a pad 6500 lb boat 502 500hp 1.5 gear ratio bravo 4 blade prop lower is about 4 inches below pad now. TIA

My guess is you won't even be able to get on plane with a -2 lower and Bravo prop.

Lower
 

It has a bravo now plane s off without even touching tabs!!!!

what rpm are you turning now ? current prop pitch

Imco
 

5800 24 bravo I know I need more prop

Im surprised its still together..............id get the revs down around 5200 5300.........maybe a 28-30 pitch, then address the drive issue

Going from 4" below the bottom to 2" below is a huge change. Most single engine V's are set up in the 3-5" below range.

I agree with Griff. You can install an IMCO SC -2 lower but you'll probably end up with a 1-1.5 inch spacer. I do like the IMCO SC lowers though, very little drag.

Imco
 

Thanks guys ill let u know how it worked in June!!!!

i put a 2 inch shorter sportmaster on our 25 foot thunder and lost the fun of overtrimming and winding it to the moon nothing sounds like a na bigblock wound up to 7000rpm it still slides on plane with no effort, it was more fun with it deep

Interested to hear how it turns out. I want to do the same thing. If there is any cavitation issues, my hunch is moving to a 5 blade propeller would fix it.

Okay have a 24-ft Baja I put an imco - 2 no problem planning off I have to run Bravo 1 prop I tried 27 3-blade will not plan off only playing off with the four blade that's just my boat I think it needs a cavitation plate you can buy and put it on but I'm happy with the four blade cuz the boat handles great doesn't sidewalk at all

A 24' Baja starts with propshaft depth in the basement at around 7" below the bottom.

I have CAD/dxf filee, for large cav plate used with -2 sportmaster. Just bend The sides after IT IS Cut. Works like at charm, prop shaft 3.7" Below bottom on My 26ft stinger.
https://cimg8.ibsrv.net/gimg/www.off...67a58f7b2a.jpg

You're right 88 was deeper I believe 1995 they moved it up cuz my buddy had an outlaw and his Drive was higher than mine put the shorty on his boat did work good work good on mine now