The trick is matching the parts. It's not lower compression that allows a properly designed engine to run on pump fuel. It's matched parts and careful machining. The last 505 I built was 11.2:1, RPM heads, and runs fine on 89 w/10% ethanol from any minimart.
Compression is at 10.75, solid Hughes cam htl4852bs3...and it runs strong and pulls hard..fun motor if anything, was a fun build..hope this helps
No, not really. First, lack of parts description,second, is 10 - 1 plus really a low compresion ratio?
To ya both;
LOL, big deal, if ya know what I mean. I can build a 13 - 1 mill and run it on 87 as well. I'll just select the biggest cam in the book and retard the timing so it don't ping. But is 13-1 ratio really a low ratio. Is a 11.2-1 low?
I think, just IMO and thinking out louc here a second.....
I think the OP is on a wave length of what was stock. Not pump gas-able.
What would you both do with a near zelch ($0) budget and a low compresion 400 or 360? Stock pistons, no block milling no fancy crank off set grinding.
Design a set up to make power at a REAL low buck budget. Lets sweeten the mix with NO HEAD PORTING. Since this is a true low budget build. Assume the heads are dead stock, small valved and good to go. This takes rebuilding the heads out of the picture and as such, you can not squeezzzeee in commensts like,"Well, for only a few bucks more, you can back cut the valves."
WRONG, that's money spent that is not available. Come on now, the basics.
We'll accept headmilling.
Challenge on!
Now, who can not just type in thebuild, but actually do it and show it! I gotta '71 Duster w/a 400/727. It'll take awhile....the car is not in state.
