Ductile iron sleeves

[Sanger]

I had a shop machine and sleeve a 6.7 Cummins block for me we talked about using Darton sleeves. The shop decided on going with this company Freedom Racing engines in Indiana is were they purchased the sleeves from. The company that made them was Quaker city castings. So my question is what are your guys opinion on these Ductile Sleeves? Anyone ever run these? Are they any good for a high HP application, Drag Racing?

 

[97rada]

Pretty sure freedom racing engines is fleece. So Ryan is has put 1500 or whatever through them

 

[straight 6 roar]

I know the Darton sleeves are pretty damn strong if the machinist knows what they're doing.

 

[Sanger]

Would it be better to run a Darton steel sleeve?