My 355 project
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My 355 project
So I have been all over the map based upon what I can get cheap. Pretty much exhausted that. Time to start thinking again.
I would like to make a 355 with a hyd roller cam, I also intend to make cooling my olympic event if I use aluminum heads.
GM performance has a delightful cam with a part number of 12370847. which is a crane cam btw. its a 234/242 at .05 on a 112, .539/.558 lift. Its really interesting because the lobes are funny shaped. at .05 its valve events have a 107 ICL at the advertised they have a 111 ICL. Its compression range is 10-11.5:1, and should work very nicely with my M21 and a 3.73 or 3.9:1 rearend.
Now I have 2 options in cylinderheads dart iron eagle 200 platinums (ridiculously good flow from 2.02 valves), or dart pro 1 platinums with the factory direct CNC chamber work, and cnc port matching.
Depending on head choice will dictate my piston choice. If I go with the iron eagles, some generic forged flat tops will be sufficent, if I go with the pro 1s a set of Ross 2.7cc dome pistons. Kinda high compression when compared to old wives tales on compression.(10.38 on iron, 11.42:1 on Aluminum) (DCR of 7.25:1 on Iron heads, 7.95:1 on Aluminum).
Couple of things concern me.
Intake Selection:
Height: tall intake may dictate the requirement of a new hood
Rear coolant ports: I require rear coolant ports
Fel-pro 1205 gasket
I am not against a tall manifold and getting an L88 hood with the fresh air chamber. BUT, I am running kind of high compression and am not to sure how well the motor would like the all natural forced induction. If I dont go with a tall single I would be using hot engine air.
I have a couple of intake options the best I can tell.
Edelbrock RPM airgap
Dart Dual Plane
Dart Single Plane
Maybe another single plane, not to sure though.
Carb selection: I am probably going to get a barry grant speed demon 750 with annular venturis and an electric choke. The question is vacuum or mechanical secondaries. Both the holley and Barry grant selection guide has me in vacuum secondary land. (3000lbs with a 4.56 rearend according to holley....., barry grant is not as stringent). But I have also found threads on various forums found by google that would like to shy away from vacuum secondaries on a single plane.
So, its a work in progress, but I figured I would share my thoughts. I hope everybody has a good day at work.
I would like to make a 355 with a hyd roller cam, I also intend to make cooling my olympic event if I use aluminum heads.
GM performance has a delightful cam with a part number of 12370847. which is a crane cam btw. its a 234/242 at .05 on a 112, .539/.558 lift. Its really interesting because the lobes are funny shaped. at .05 its valve events have a 107 ICL at the advertised they have a 111 ICL. Its compression range is 10-11.5:1, and should work very nicely with my M21 and a 3.73 or 3.9:1 rearend.
Now I have 2 options in cylinderheads dart iron eagle 200 platinums (ridiculously good flow from 2.02 valves), or dart pro 1 platinums with the factory direct CNC chamber work, and cnc port matching.
Depending on head choice will dictate my piston choice. If I go with the iron eagles, some generic forged flat tops will be sufficent, if I go with the pro 1s a set of Ross 2.7cc dome pistons. Kinda high compression when compared to old wives tales on compression.(10.38 on iron, 11.42:1 on Aluminum) (DCR of 7.25:1 on Iron heads, 7.95:1 on Aluminum).
Couple of things concern me.
Intake Selection:
Height: tall intake may dictate the requirement of a new hood
Rear coolant ports: I require rear coolant ports
Fel-pro 1205 gasket
I am not against a tall manifold and getting an L88 hood with the fresh air chamber. BUT, I am running kind of high compression and am not to sure how well the motor would like the all natural forced induction. If I dont go with a tall single I would be using hot engine air.
I have a couple of intake options the best I can tell.
Edelbrock RPM airgap
Dart Dual Plane
Dart Single Plane
Maybe another single plane, not to sure though.
Carb selection: I am probably going to get a barry grant speed demon 750 with annular venturis and an electric choke. The question is vacuum or mechanical secondaries. Both the holley and Barry grant selection guide has me in vacuum secondary land. (3000lbs with a 4.56 rearend according to holley....., barry grant is not as stringent). But I have also found threads on various forums found by google that would like to shy away from vacuum secondaries on a single plane.
So, its a work in progress, but I figured I would share my thoughts. I hope everybody has a good day at work.
