Bare with me, i know just enough to get me in trouble.
Need some comments and recommendations on a cam to use in this engine.
BBC
bore 4.280 +210 dome
4.000 stroke
6.135 rods
118cc heads stock
2500 stall
700r4 trans
4.10 rearend
750 holley vacumn secondaries
Edelbrock performer 2.0 intake
Ported heads gasket matched to intake.
flat tappet? roller cam? hydraulic? solid lifter?
whats the max lift and load rate on your valve springs ?
whats the car weight?
tire diam.?
do you need to run pump gas?
whats the actual compression ratio?
HEADERS?
what do YOU intend to do with the car?
need to pass emission testing?
Well grumpy, how did i know you would come back with so many question.
Ok will try and give you as much info as possible.
1. full length headers
2. Daily street driver and hotrod." pump gas"
3.28" tires
4.no smog
5.10:1 comp
6.weight 56 2dr chevy i'm quessing around 3200lbs
7.Right now it has this cam the there lifters and springs..Don't like it very noisy.
http://www.compcams.com/Cam_Specs/CamDe ... d=388&sb=2
by noisy, are you referring to the valve train noise at idle?, the exhaust sound ? does it click softly and rhythmically like a solid lifter, or does it clatter like theres a valve train issue?
If you ignore the noise,how does the power curve, suit your expectations?
have you adjusted the valves while its idling?
comp cams are notorious for having fast closing lobe ramps that seat the valves with a bit of noise, that at least in theory allows the valves to remain open a bit longer for a given duration,but its also harder on the valve train, decreasing durability slightly in some cases
1/4 turn in from the point the lifter just stops clicking at idle has worked the best over the years for me
Ive always found the final adjusting of HYDRAULIC LIFTERS is best done at idle, with the engine up to operating temps., as it allows for all the variables like heat expansion and lifter seat movement as the oil pressure lifts the push rod seat) of course a tall valve cover roughly similar to this mod helps reduce the potential for a mess
given the info you've posted,something similar to this cam linked to below seems like a decent match,its got a bit less intake duration for more low rpm tq and longer exhaust duration and more lift for better breathing, with a full exhaust, but be aware you'll NEED to get better valve springs and verify clearances to run EITHER cam as stock springs and clearances are very unlikely to work which may be the cause of your current problem, but why not talk to the tech guys at crane
866-388-5120
but before you even do that please answer the questions so others gain info from your experience
http://www.cranecams.com/?show=browsePa ... e=camshaft
Need some comments and recommendations on a cam to use in this engine.
BBC
bore 4.280 +210 dome
4.000 stroke
6.135 rods
118cc heads stock
2500 stall
700r4 trans
4.10 rearend
750 holley vacumn secondaries
Edelbrock performer 2.0 intake
Ported heads gasket matched to intake.
flat tappet? roller cam? hydraulic? solid lifter?
whats the max lift and load rate on your valve springs ?
whats the car weight?
tire diam.?
do you need to run pump gas?
whats the actual compression ratio?
HEADERS?
what do YOU intend to do with the car?
need to pass emission testing?
Well grumpy, how did i know you would come back with so many question.
Ok will try and give you as much info as possible.
1. full length headers
2. Daily street driver and hotrod." pump gas"
3.28" tires
4.no smog
5.10:1 comp
6.weight 56 2dr chevy i'm quessing around 3200lbs
7.Right now it has this cam the there lifters and springs..Don't like it very noisy.
http://www.compcams.com/Cam_Specs/CamDe ... d=388&sb=2
by noisy, are you referring to the valve train noise at idle?, the exhaust sound ? does it click softly and rhythmically like a solid lifter, or does it clatter like theres a valve train issue?
If you ignore the noise,how does the power curve, suit your expectations?
have you adjusted the valves while its idling?
comp cams are notorious for having fast closing lobe ramps that seat the valves with a bit of noise, that at least in theory allows the valves to remain open a bit longer for a given duration,but its also harder on the valve train, decreasing durability slightly in some cases
1/4 turn in from the point the lifter just stops clicking at idle has worked the best over the years for me
Ive always found the final adjusting of HYDRAULIC LIFTERS is best done at idle, with the engine up to operating temps., as it allows for all the variables like heat expansion and lifter seat movement as the oil pressure lifts the push rod seat) of course a tall valve cover roughly similar to this mod helps reduce the potential for a mess
given the info you've posted,something similar to this cam linked to below seems like a decent match,its got a bit less intake duration for more low rpm tq and longer exhaust duration and more lift for better breathing, with a full exhaust, but be aware you'll NEED to get better valve springs and verify clearances to run EITHER cam as stock springs and clearances are very unlikely to work which may be the cause of your current problem, but why not talk to the tech guys at crane
866-388-5120
but before you even do that please answer the questions so others gain info from your experience
http://www.cranecams.com/?show=browsePa ... e=camshaft