Re: How's a 572 ci gonna run?
 

I spoke to Ron @ Imco just now. He's thinking I should have a 12" box with a 3" rise. Than a 1" shorted lower drive. Total of 4"s. I think it's too much, what do you think?

Re: How's a 572 ci gonna run?
 

Hey Tom,
The stock Y2K has the prop shaft 3" below the bottom which seems to be working well on Krackmeup's boat. The slip numbers are quite good with a stock 4 blade; 13% at 72+mph.
Jcap found that a 2" spacer and 5 blade prop were needed in his quest to crack the 90mph mark.
Mike had an Imco extension box on his boat; he is the guy to ask.
I would say that a neutral extension box would be better based on the fact Jcap's set-up has the prop shaft 5" below the bottom.
Did you ask Imco how much HP their drive can handle?

Re: How's a 572 ci gonna run?
 

Ron said most people are ok at 700hp range but I think the XR is just as good personaly.

Re: How's a 572 ci gonna run?
 

Oh-Zone is having his 30 rigged with the Merc. ITS.
What kind of set-back does that provide?
I wonder how the cost compares to the Imco box and steering?

Re: How's a 572 ci gonna run?
 

Did Ron tell you that with the 3 inch raise box the motor has to go up 3 inches in the boat. JCAP has proven that the high X will not give the boat enough bow lift.The ZUPERBOAT had a neutral box and -2 drive.That put the shaft at 2 below the bottom.I spoke to throttle up about props and they had a good point.The more blades the less stress on each blade.That should be the same for drives.Twin small blocks stock drives=85mph.We need JCAP/MR WIZARD to do the math, power to weight thing. Lets see if rick has any info on the boat with twins.

Re: How's a 572 ci gonna run?
 

Pat
The ITS has I believe a 71/2 in set-back. I don't know the cost comparison...

Re: How's a 572 ci gonna run?
 

Hey Oh-Zone,
I would bet your HP525 and ITS is going to prove to be one awesome set-up... :D

Re: How's a 572 ci gonna run?
 

The merc ITS looks like a mini #6 sweeeet.The imco with the stearing wings is outdated.Now motors Im sure you can get a nice 598 with 700hp for the price of a 525.

Re: How's a 572 ci gonna run?
 

Hey ZZ,
Why 572 or 598 for 700HP and not a 502 with a super charger???
Jcap chose supercharger, you more cubes...

Re: How's a 572 ci gonna run?
 

Drive Choices...
http://www.mercurymarine.com/drives4

Hey Tom,
Have you asked JC what a speedy would cost?
The IIIA looks like the one for 750HP...

Hey ZZ,
Which drive do you have?