Hypereutectics pistons and alcohol
#1
Junior Member
SHOW GUEST
Thread Starter
Join Date: Nov 2011
Location: Pensacola, FL
Posts: 5
Hypereutectics pistons and alcohol
Considering some KB hypers (64cc heads) for a production SBC 406 Alky setup. Plan is to run N/A alky 13:1 ratio 500-600hp with a rotating assembly rated for 650hp max. DRAG Car.
Its my first engine and after some research and deliberation I want to try alky over pump gas/NOS. Anyways, I really haven't found anything that warns against hypers & alky. I know hypers are not a good idea for NOS, supercharging etc. I've read plenty on the differences of hypers: harder and more brittle, less expansion, tighter clearances and timing.
Does anyone have any experience/knowledge on using alky with hyper pistons?
good, bad or ugly...
tks
James
Its my first engine and after some research and deliberation I want to try alky over pump gas/NOS. Anyways, I really haven't found anything that warns against hypers & alky. I know hypers are not a good idea for NOS, supercharging etc. I've read plenty on the differences of hypers: harder and more brittle, less expansion, tighter clearances and timing.
Does anyone have any experience/knowledge on using alky with hyper pistons?
good, bad or ugly...
tks
James
#2
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
Not a good plan with alcohol, i know some guys that run a 305 sprint car were the rules mandate stock type piston and heads on alcohol, the biggest problem with them is you have to run atleast a .030 ring gap on the top ring, or you'll pull the top off due to the heat, and that much end gap causes the clyinders to wash down on warm up, and milk the oil pretty bad. It's not easy or cheap to build a good reliable engine to run alcohol. It's kinda like throwing a 200 shot of nitrous on a bone stock, engine, you can do it but for how long :?:
JMO
Zip.
JMO
Zip.
#3
Junior Member
SHOW GUEST
Thread Starter
Join Date: Nov 2011
Location: Pensacola, FL
Posts: 5
Originally Posted by zipper06
Not a good plan with alcohol, i know some guys that run a 305 sprint car were the rules mandate stock type piston and heads on alcohol, the biggest problem with them is you have to run atleast a .030 ring gap on the top ring, or you'll pull the top off due to the heat, and that much end gap causes the clyinders to wash down on warm up, and milk the oil pretty bad. It's not easy or cheap to build a good reliable engine to run alcohol. It's kinda like throwing a 200 shot of nitrous on a bone stock, engine, you can do it but for how long :?:
JMO
Zip.
JMO
Zip.
#4
Check these pistons out. Good prices for a 2618 forged piston. I have a set from when they were sold under the Keith Black name in my motor now. Very nice piston for the price. I got lucky and ordered mine from Summit not knowing that they had the wrong price in only for the piston I needed at the time. Paid 275.00 for set of 8. Had I looked at any other sizes on the sight at the time I would have seen I saved a couple hundred dollars and I might have ordered a couple more sets.
http://www.summitracing.com/search/Brand/ICON-Performance-Pistons/Make/CHEVROLET/Part-Type/Pistons/Bore-in/4-155-in/?Ns=Rank|Asc
Here is the web site.
http://www.kb-silvolite.com/icon/index.html
Curtis
http://www.summitracing.com/search/Brand/ICON-Performance-Pistons/Make/CHEVROLET/Part-Type/Pistons/Bore-in/4-155-in/?Ns=Rank|Asc
Here is the web site.
http://www.kb-silvolite.com/icon/index.html
Curtis
#5
Senior Member
MASTER BUILDER
Join Date: Apr 2003
Location: Brookings South Dakota
Posts: 244
Buy a good set of forged pistons, if money is a concern, Icon Makes a great forged piston for a pretty attractive price. The hyperuteitc are prone to cracking the ring lands as they are very brittle. Wider ring end gaps are required.