I need expert opinion for a cam selection street 454 with Merlin 269
July 3rd, 2020, 11:14 AM
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I need expert opinion for a cam selection street 454 with Merlin 269
Cams and pushrod lengths confuse me.
My question is, what is the best cam. This is what I have and had done and want to work with:
I am building a 454.
Machine shop over bored.060. Standard deck height.
My pistons are heavy. new forged TRW -13.80cc .060 over.
Eagle H Beam rods.
Reground -.010 nodular iron cast 039 crank. Magnafluxed Shotpeened flange trued.
I had a set of older Merlin 269 Heads rebuilt. The older ones have the 2.19/1.88 valves. New valve grind. Seats re cut 3 angle. Spring height correctly set. 135lb springs. These heads have been milled approximately .030.
Combustion Chambers are 113cc not 119
Intake cc at 271 not 269
Flow:
.100 75/65
.200 144/121
.300 213/165
.400 275/202
.500 323/239
.600 352/262
.700 355/274
.800 341/282
I have a Edelbrock dual plane intake. Not the air gap. The regular one.
800cfm Edelbrock carb.
I am going roller hydraulic.
What’s the best cam? I am not very knowledgeable on valvetrain geometry.
Have my eye on a trickflow cam:Summit Racing Part Number:
TFS-41302000
Duration at 050 inch Lift: 236 242
hydraulic roller cam
Advertised Duration:
286 292. .600 lift Lobe Sep. 112
Will this cam handle cut down heads and dome pistons? How do I know the valves will clear the dome pistons before I buy the cam? Is it too big? Just don’t want to buy this cam and be stuck with it if it has too much lift.
Want max power from this combination i already have. Cams and pushrod lengths confuse me. Thank you.
My question is, what is the best cam. This is what I have and had done and want to work with:
I am building a 454.
Machine shop over bored.060. Standard deck height.
My pistons are heavy. new forged TRW -13.80cc .060 over.
Eagle H Beam rods.
Reground -.010 nodular iron cast 039 crank. Magnafluxed Shotpeened flange trued.
I had a set of older Merlin 269 Heads rebuilt. The older ones have the 2.19/1.88 valves. New valve grind. Seats re cut 3 angle. Spring height correctly set. 135lb springs. These heads have been milled approximately .030.
Combustion Chambers are 113cc not 119
Intake cc at 271 not 269
Flow:
.100 75/65
.200 144/121
.300 213/165
.400 275/202
.500 323/239
.600 352/262
.700 355/274
.800 341/282
I have a Edelbrock dual plane intake. Not the air gap. The regular one.
800cfm Edelbrock carb.
I am going roller hydraulic.
What’s the best cam? I am not very knowledgeable on valvetrain geometry.
Have my eye on a trickflow cam:Summit Racing Part Number:
TFS-41302000
Duration at 050 inch Lift: 236 242
hydraulic roller cam
Advertised Duration:
286 292. .600 lift Lobe Sep. 112
Will this cam handle cut down heads and dome pistons? How do I know the valves will clear the dome pistons before I buy the cam? Is it too big? Just don’t want to buy this cam and be stuck with it if it has too much lift.
Want max power from this combination i already have. Cams and pushrod lengths confuse me. Thank you.
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