Hello,
Total newb to this site, but have driven a US log head 200 for a couple decades and want more power. I looked for info on xflows on a 200. I found http://fordsix.com/forum/viewtopic.php? ... ight=us200 but this is a hotter setup than I need so I ask you the experts for another opinion.
I will be building a EFI US200 with a 1987 Xflow XF EFI head. I am aiming for about 150HP or more if drivability and mileage do not suffer (automatic with stock stall converter, 9:1CR, 87 US octane, headers eventually & 2.25†EX system). I do NOT want to over-cam.
I need to buy a new cam but the specs from CROW cams are for a 250CI engine. I like specs of the #14221 but I think it is too much for a 200CI is a 14613 still too hot a cam?
Is a 1987 XF EFI triggered from a crank trigger or just from the dizzy?
Is a LPG cam perfectly useable on a normally fuelled engine?
________________stock 200CI__________________
YEAR 77-80 200CI Chamber 62 In-valve 1.75 Ex-valve 1.54 HP 85 TQ 154
CAM Duration Valve Lift
200ci - hyd 252/256 .348
200ci - hyd 256 .372
_________________Xflow cams__________________
XFLOW 4.1 EFI Valves IN 1.84 EX 1.55
CROW# 14678 Standard replacement EFI Cam.
power range 900-3400rpm lobe cen 109
in 264/196@.050" lift .439"
ex 264/196@.050" lift .439"
CROW# 14613 High torque, fuel efficient, smooth idle. Use for LPG in unleaded cars. Excellent for towing.
power range 1000-3800rpm lobe cen 112
in 254/194@.050" lift .441"
ex 264/202@.050" lift .470"
CROW# 14771 L.P.Gas cam for good power and fuel economy in standard leaded motors.
power range 1200-4000rpm lobe cen 111
in 258/200@.050" lift .458"
ex 262/205@.050" lift .470"
CROW# 14221 Improves throttle response. Highway cam for mild or stock engines.
power range 1400-4200rpm lobe cen 109
in 266/205@.050" lift .472"
ex 271/209@.050" lift .485"
THANKS!
Mark
Total newb to this site, but have driven a US log head 200 for a couple decades and want more power. I looked for info on xflows on a 200. I found http://fordsix.com/forum/viewtopic.php? ... ight=us200 but this is a hotter setup than I need so I ask you the experts for another opinion.
I will be building a EFI US200 with a 1987 Xflow XF EFI head. I am aiming for about 150HP or more if drivability and mileage do not suffer (automatic with stock stall converter, 9:1CR, 87 US octane, headers eventually & 2.25†EX system). I do NOT want to over-cam.
I need to buy a new cam but the specs from CROW cams are for a 250CI engine. I like specs of the #14221 but I think it is too much for a 200CI is a 14613 still too hot a cam?
Is a 1987 XF EFI triggered from a crank trigger or just from the dizzy?
Is a LPG cam perfectly useable on a normally fuelled engine?
________________stock 200CI__________________
YEAR 77-80 200CI Chamber 62 In-valve 1.75 Ex-valve 1.54 HP 85 TQ 154
CAM Duration Valve Lift
200ci - hyd 252/256 .348
200ci - hyd 256 .372
_________________Xflow cams__________________
XFLOW 4.1 EFI Valves IN 1.84 EX 1.55
CROW# 14678 Standard replacement EFI Cam.
power range 900-3400rpm lobe cen 109
in 264/196@.050" lift .439"
ex 264/196@.050" lift .439"
CROW# 14613 High torque, fuel efficient, smooth idle. Use for LPG in unleaded cars. Excellent for towing.
power range 1000-3800rpm lobe cen 112
in 254/194@.050" lift .441"
ex 264/202@.050" lift .470"
CROW# 14771 L.P.Gas cam for good power and fuel economy in standard leaded motors.
power range 1200-4000rpm lobe cen 111
in 258/200@.050" lift .458"
ex 262/205@.050" lift .470"
CROW# 14221 Improves throttle response. Highway cam for mild or stock engines.
power range 1400-4200rpm lobe cen 109
in 266/205@.050" lift .472"
ex 271/209@.050" lift .485"
THANKS!
Mark