Engine Building Ideas
Posted: Wed Jul 05, 2017 10:38 pm
I don't really have ideas but I am looking for opinions to see if there is a consensus. The questions I have relate to building whatever 6 cylinder I end up with, but I think they are valid for any engine build so I thought here was as good as any to post this.
I am heavily leaning toward building a 250cid 6 right now so those are the numbers I am going to use here and was looking at piston options etc. remember that I don't get a ton of options, so anyway here goes, and I will probably say some ignorant stuff so just correct me and move on
When increasing compression ratio, what does everybody think a good number to shoot for, for a street car running regular pump gas (possibly premium because I can get it ethanol free)?
To increase compression is it better to mill the head or deck the block or use a different piston? In my situation I have a choice of about 3 or 4 different pistons I can use; stock cast with either a 6.5cc or a 13cc dish, a flat top cast piston out of a Ford Tempo, or a Ford 255cid V8 piston with a compression height of 1.585" as opposed to the stock height of 1.50" for the 6 (the stock piston has between .120" and .150" of deck height).
Cam Timing (this is where everything goes fuzzy) the most I know is reading "Ford Falcon 6 Cylinder Performance Handbook" it tells me to use a '69 chain and gear set because Ford kept advancing timing for fuel economy, not sure what I am looking for here so I will include the stock timing on the cam - Duration 256°, Int. Open 10° BTC, Int. Close 66° ABC, Ex. Open 58° BBC, Ex. Close 18° ATC, Overlap 28°, Lift .368. There are several different cam grinds available but not sure what would work best.
Hopefully that is enough to get the discussion started so I can get more confused.
I have a few questions about V8 drivetrain stuff but will post over in that section.
See Ya,
Mike
I am heavily leaning toward building a 250cid 6 right now so those are the numbers I am going to use here and was looking at piston options etc. remember that I don't get a ton of options, so anyway here goes, and I will probably say some ignorant stuff so just correct me and move on
When increasing compression ratio, what does everybody think a good number to shoot for, for a street car running regular pump gas (possibly premium because I can get it ethanol free)?
To increase compression is it better to mill the head or deck the block or use a different piston? In my situation I have a choice of about 3 or 4 different pistons I can use; stock cast with either a 6.5cc or a 13cc dish, a flat top cast piston out of a Ford Tempo, or a Ford 255cid V8 piston with a compression height of 1.585" as opposed to the stock height of 1.50" for the 6 (the stock piston has between .120" and .150" of deck height).
Cam Timing (this is where everything goes fuzzy) the most I know is reading "Ford Falcon 6 Cylinder Performance Handbook" it tells me to use a '69 chain and gear set because Ford kept advancing timing for fuel economy, not sure what I am looking for here so I will include the stock timing on the cam - Duration 256°, Int. Open 10° BTC, Int. Close 66° ABC, Ex. Open 58° BBC, Ex. Close 18° ATC, Overlap 28°, Lift .368. There are several different cam grinds available but not sure what would work best.
Hopefully that is enough to get the discussion started so I can get more confused.
I have a few questions about V8 drivetrain stuff but will post over in that section.
See Ya,
Mike