Couple engine building questions

[auto_x5.0]

Question #1-I have new pistons, but no pistons rings. The block is .030 over, pistons are .030 over pistons, how do I figure out what size piston rings I need, and are there good brands and bad brands?

Question #2-Has anybody here done a e85 carb build? I'm really thinking about going to e85 for the performance benefits and the fact that it's at the pump and cheap

Any help is great, thanks

 

[945.0]

what brand pistons and whats the part number for them

 

[auto_x5.0]

Keith Black pistons
kb312+.030

 

[5.0kid]

according to http://autoplicity.com/products/383...312020_keith_black_hypereutectic_pistons.aspx

you need

5/64 in. x 5/64 in. x 3/16 in. piston rings. make sure to get the .30 over rings!

here are some good rings

​

http://www.summitracing.com/parts/SLP-R934335/

you could also give summit a call and make sure...

 

[5.0kid]

ok that first link isn't working but here it is in on another site, hopefully it works. also says 5/64 and 3/16 rings. moly rings are supposed to be better rings. you can spend a lot more for other rings, but i was told moly rings back when i built mine.

http://www.rpmmachine.com/shop/index.php?l=product_detail&p=6429

 

[945.0]

yes moly rings are good rings

 

[auto_x5.0]

Ok, now what about e85 through a carb? Do I need to swap over gaskets, floats, jets, etc?

 

[mikey94gt]

Call up csu, http://csucarbs.com/ and grill them. A buddy and I set up one of their e85 blow thru carbs, and it worked perfectly after a few minor tweaks. They can set you on the right path. Kevin over there is a genius with carbs.

 

[mikey94gt]

But yes, everything needs to be roughly 30% bigger, jets, fuel line, fuel pump. Efc. Your basically building an alcohol carb. The floats need to be changed too.

One thought, are you going nitrous or boost? High compression? (12.1 or higher?)