Rigging a new allison

**MGR** · 12-29-2014

This might sound dum butt what is the point of adding set back .
how do you no how much to add?

**wtsjr66** · 12-29-2014

Adjustability without resealing the transom every time, also the new boat that I have from Larry must use a plate because of the way the upper edge is formed. There is a company that makes a 2'' and 3'' adjustable plate that fits these small boats real well, I saw them at one of the Southeastern Drag Boat club races this year in S.C. Someone come get this new Allison before I change my mind! Billy 912-663-0424

**Hevi Kevi** · 12-29-2014

Originally Posted by MGR

This might sound dum butt what is the point of adding set back .
how do you no how much to add?

Set back is to help adjust the balance of the boat, it gets the weight to back more. I've also been told 2 to 3 inches of setback on these style boats helps you accel out of the corner better.

Kevin

**MGR** · 12-29-2014

So we're do you won't the balance point to be?

**MGR** · 12-29-2014

Attachment 59054 Attachment 59055 Attachment 59056 Attachment 59057
here are some pics of the boat when i picked it up it Florida from Larry

**Hounddog** · 12-29-2014

MGR Several of the racers do not run any set back at all. The set back helps bow lift because you do not require a lot of positive trim to carry the bow. The set back also puts the prop in better water. The hull makes a hole behind the boat and that disrupts the water going to the prop. On a race boat too much set back will cause the boat to drag in the corner which hurts cornering speed and exit speed. Boat balance is different for each driver. What you don't want is to have the bow rise [kite] as you back off entering the corner. You want to be able to trim down and have the boat set for the turn and have the bow drop slightly should you need to back off. Proper balance is full speed, very little if any positive trim and the boat will take off and land level off a wave. A lake racer or a kilo run boat can have more set back on the boat. I believe Joe ran 12 inch set back on his kilo run EP Allison.

**sheuninck** · 12-29-2014

Originally Posted by MGR

So we're do you won't the balance point to be?

1 beam forward

**MGR** · 12-29-2014

What do you mean buy beam?
And thanks guys for all the info so far

**ultrafast30** · 01-01-2015

If you do a search for Allison 13r for sale you can see how the bobs works out it ends up 2-1/2" offset I did this boat a few years ago. I am discussing a race deck boat now. Building a Shorty v4 alcohol motor for it. Not quite sure what I ll do with the boat. Odba is considering a v4 class.