Cam Advance and Retard... which do i do to make this change?
#1
TECH Resident
Thread Starter
iTrader: (1)
Join Date: May 2002
Location: The Thin Air
Posts: 859
Likes: 0
Received 0 Likes
on
0 Posts
Cam Advance and Retard... which do i do to make this change?
my tsp 231/237 is on a 112 +2
do i advance it or retard it 2deg to get it to 110 +2 ?
Normally Installed it looks like this...
Intake Valve opens - IVO 5.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 45.5 ABDC
Exhaust Valve Opens - EVO 52.5 BBDC
Exhaust Valve Closes - EVC 4.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 114
Overalap 10 degrees
I want it to look like this 110 lsa +2
Intake Valve opens - IVO 7.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 43.5 ABDC
Exhaust Valve Opens - EVO 50.5 BBDC
Exhaust Valve Closes - EVC 6.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 112
Overalap 14 degrees
do i advance it or retard it 2deg to get it to 110 +2 ?
Normally Installed it looks like this...
Intake Valve opens - IVO 5.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 45.5 ABDC
Exhaust Valve Opens - EVO 52.5 BBDC
Exhaust Valve Closes - EVC 4.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 114
Overalap 10 degrees
I want it to look like this 110 lsa +2
Intake Valve opens - IVO 7.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 43.5 ABDC
Exhaust Valve Opens - EVO 50.5 BBDC
Exhaust Valve Closes - EVC 6.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 112
Overalap 14 degrees
#2
9 Second Club
iTrader: (5)
Join Date: Jan 2002
Location: Sacramento
Posts: 651
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by T/A Medic
my tsp 231/237 is on a 112 +2
do i advance it or retard it 2deg to get it to 110 +2 ?
Normally Installed it looks like this...
Intake Valve opens - IVO 5.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 45.5 ABDC
Exhaust Valve Opens - EVO 52.5 BBDC
Exhaust Valve Closes - EVC 4.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 114
Overalap 10 degrees
I want it to look like this 110 lsa +2
Intake Valve opens - IVO 7.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 43.5 ABDC
Exhaust Valve Opens - EVO 50.5 BBDC
Exhaust Valve Closes - EVC 6.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 112
Overalap 14 degrees
do i advance it or retard it 2deg to get it to 110 +2 ?
Normally Installed it looks like this...
Intake Valve opens - IVO 5.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 45.5 ABDC
Exhaust Valve Opens - EVO 52.5 BBDC
Exhaust Valve Closes - EVC 4.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 114
Overalap 10 degrees
I want it to look like this 110 lsa +2
Intake Valve opens - IVO 7.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 43.5 ABDC
Exhaust Valve Opens - EVO 50.5 BBDC
Exhaust Valve Closes - EVC 6.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 112
Overalap 14 degrees
Don
#4
Originally Posted by Jabroni
LSA is ground in. Unfortunately, you're stuck with it.
you ARE stuck with the LSA but you CAN retard to get your desired VEs if you wish. what he is asking here how much mest he retard to get the desired VEs,altho not perfectly he can get Verry close..
#5
9 Second Club
iTrader: (5)
Join Date: Jan 2002
Location: Sacramento
Posts: 651
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Gage
Yes and NO
you ARE stuck with the LSA but you CAN retard to get your desired VEs if you wish. what he is asking here how much mest he retard to get the desired VEs,altho not perfectly he can get Verry close..
you ARE stuck with the LSA but you CAN retard to get your desired VEs if you wish. what he is asking here how much mest he retard to get the desired VEs,altho not perfectly he can get Verry close..
#6
Originally Posted by Reboot
He has to advance an additional 2 degrees to get the desired VE's. Retarding the cam will move the VE's in the opposite direction of what he's looking for.
this retarded 2deg.
IVO 3.5
IVC 47.5
EVO 50.5
EVC 6.5
and this is advanced 2deg(to make it +4 from the original)
IVO 7.5
IVC 43.5
EVO 54.5
EVC 2.5
Last edited by Gage; 10-28-2003 at 07:50 PM.
#7
9 Second Club
iTrader: (5)
Join Date: Jan 2002
Location: Sacramento
Posts: 651
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Gage
DOH, ya thats what i ment, lol
this retarded 2deg.
IVO 3.5
IVC 47.5
EVO 50.5
EVC 6.5
and this is advanced 2deg(to make it +4 from the original)
IVO 7.5
IVC 43.5
EVO 54.5
EVC 2.5
this retarded 2deg.
IVO 3.5
IVC 47.5
EVO 50.5
EVC 6.5
and this is advanced 2deg(to make it +4 from the original)
IVO 7.5
IVC 43.5
EVO 54.5
EVC 2.5