do I have an A or C code ?
08-18-2008, 06:07 AM
#1
6th Gear Member
Thread Starter
Join Date: Oct 2006
Location: Cork, Ireland
Posts: 6,417
do I have an A or C code ?
Hi all,
the engine is 289 from a 66 Mustang (at least to what the engine casting number says).
The datecode confirms. I guess the block is the same anyway, but they have different compression.
So for that I guess there are 2 types of heads.
Is there any way to figure what compression ratio (what head) I have without poulling it?
the engine is 289 from a 66 Mustang (at least to what the engine casting number says).
The datecode confirms. I guess the block is the same anyway, but they have different compression.
So for that I guess there are 2 types of heads.
Is there any way to figure what compression ratio (what head) I have without poulling it?
08-18-2008, 06:29 AM
#2
Join Date: Mar 2006
Location: California
Posts: 36
Not sure about the compression ratio but...
is it just the short block or is it complete, A codes came with 4 barrel carb, C code with 2 barrel. I thought the A codes were supposed to be ~10:1 comp, and C codes ~9.5:1
check this site
http://www.carmemories.com/cgi-bin/v...erience_id=131
is it just the short block or is it complete, A codes came with 4 barrel carb, C code with 2 barrel. I thought the A codes were supposed to be ~10:1 comp, and C codes ~9.5:1
check this site
http://www.carmemories.com/cgi-bin/v...erience_id=131
08-18-2008, 09:32 AM
#3
6th Gear Member
Thread Starter
Join Date: Oct 2006
Location: Cork, Ireland
Posts: 6,417
engine is complete. currently 2barrell but I know the PO ran a 4barrell on it.
But thankls for the link. it says that both the A-code and C-code had a comp ratio of 9.81:1 in 1966
So that answers my question
thanks !
But thankls for the link. it says that both the A-code and C-code had a comp ratio of 9.81:1 in 1966
So that answers my question
thanks !
08-18-2008, 11:09 AM
#5
6th Gear Member
Join Date: Aug 2007
Location: Elk Grove, CA
Posts: 5,896
Compression change is actually from different pistons, not different heads. There are no 2V or 4V heads. The only way to tell would be to either look at the VIN on the original car, or take it apart and inspect the pistons.
08-18-2008, 03:59 PM
#9
6th Gear Member
Thread Starter
Join Date: Oct 2006
Location: Cork, Ireland
Posts: 6,417
yah. sorry. should have pointed that out more clear.
car is U or F code. don't remember. 170ci 6 banger. engine is 289 from 66
But as all the 66 289s are same compression ratio the only difference seems to be the intake and carb .. which i'm going to change. I'll just wait for a few months, order a cam kit (the K31-234-3). I have a weiand8124 intake and a holley 570 already sitting on the shelf waiting to go in .. :-)
Usually i'd put in the carb and intake straight away, but I was not driving for 3 months, so all money is now going towards petrol :-)
car is U or F code. don't remember. 170ci 6 banger. engine is 289 from 66
But as all the 66 289s are same compression ratio the only difference seems to be the intake and carb .. which i'm going to change. I'll just wait for a few months, order a cam kit (the K31-234-3). I have a weiand8124 intake and a holley 570 already sitting on the shelf waiting to go in .. :-)
Usually i'd put in the carb and intake straight away, but I was not driving for 3 months, so all money is now going towards petrol :-)
08-18-2008, 04:28 PM
#10
5th Gear Member
Join Date: Jul 2006
Location: San Diego, CA
Posts: 2,990
sorry I didn't make the connection that that the engine was a 66 and the car was a 64.5
you said its two barrel but the PO ran a 4? does it have a 2 barrel intake then and the PO used an adapter? what intake do you have
you said its two barrel but the PO ran a 4? does it have a 2 barrel intake then and the PO used an adapter? what intake do you have