BoredandStroked
Well-Known Member
Hey All... here is some fun with crankshafts !
I am building a 318 up and I know its unusual but oh well. I am trying to get between 450 and 500 hp out of it. But I am having a tough time with choices of crankshafts, connecting rods, heads, intake manifolds, and camshafts of course.
For crankshafts I can decided between a 273 forged, 3.578 inch casted, or 4 inch casted. I want rpms but the main thing is power haha. How much would a 3.578 inch (which is a 360 crank) or a 4 inch make my rpms drop? I saw in an article that a group spun up a 318 with a 273 forged crank up to 6500 rpms and made 400 hp. But I am curious at how much a stroker combo will go up too. I know some of you guys have built stroker combos so let me here what you have to say.
For connecting rods I cant decided between keeping my own 318 rods (1973 engine) since I heard they are pretty strong or get a set of repro 340 rods or go with a new set of forged SCAT rods. Any and I mean ANY help with this would be a great help... so confusing since I am trying to learn it all haha.
For cylinder heads I am deciding between Magnum heads and X and J heads (915 casting). Do you have to do any work on the X or J heads to make them work right? I heard you had to do something because it would actually make ur combustion lower if you put them on a 318. The Magnum heads I do not know that much about other than that they are a close chamber design. But I hear they are a great head to use just I dont know much about them.
For intake manifolds you can refer to my other Forum. But I am chosing between the Edelbrock RPM Air Gap, Mopar M-1, Weiand X-CELerator and Stealth. I have NEVER heard anything about the Weiand's so I am curious to see what they can do. I have never heard a bad word on the M-1 side other than the Edelbrock does a better job on the low-mid range end but the M-1 is better for top end. So again... any help in this is greatly wanted haha.
For camshafts... I just need a cam that will work with everything haha... plain and simple. But I dont know where to go for it. So many places like Hughes Engines, CompCams, Crane Cams, Edelbrock, and alot of others.
Ok this pretty much covers everything. I just need alot of help with this engine build haha. As you can tell I am sure but give me a break... I am only 17 and I was a very stupid chevy boy for many years. Finally switched to Mopar and learned what power and knowledge was haha. Thank you all!
I am building a 318 up and I know its unusual but oh well. I am trying to get between 450 and 500 hp out of it. But I am having a tough time with choices of crankshafts, connecting rods, heads, intake manifolds, and camshafts of course.
For crankshafts I can decided between a 273 forged, 3.578 inch casted, or 4 inch casted. I want rpms but the main thing is power haha. How much would a 3.578 inch (which is a 360 crank) or a 4 inch make my rpms drop? I saw in an article that a group spun up a 318 with a 273 forged crank up to 6500 rpms and made 400 hp. But I am curious at how much a stroker combo will go up too. I know some of you guys have built stroker combos so let me here what you have to say.
For connecting rods I cant decided between keeping my own 318 rods (1973 engine) since I heard they are pretty strong or get a set of repro 340 rods or go with a new set of forged SCAT rods. Any and I mean ANY help with this would be a great help... so confusing since I am trying to learn it all haha.
For cylinder heads I am deciding between Magnum heads and X and J heads (915 casting). Do you have to do any work on the X or J heads to make them work right? I heard you had to do something because it would actually make ur combustion lower if you put them on a 318. The Magnum heads I do not know that much about other than that they are a close chamber design. But I hear they are a great head to use just I dont know much about them.
For intake manifolds you can refer to my other Forum. But I am chosing between the Edelbrock RPM Air Gap, Mopar M-1, Weiand X-CELerator and Stealth. I have NEVER heard anything about the Weiand's so I am curious to see what they can do. I have never heard a bad word on the M-1 side other than the Edelbrock does a better job on the low-mid range end but the M-1 is better for top end. So again... any help in this is greatly wanted haha.
For camshafts... I just need a cam that will work with everything haha... plain and simple. But I dont know where to go for it. So many places like Hughes Engines, CompCams, Crane Cams, Edelbrock, and alot of others.
Ok this pretty much covers everything. I just need alot of help with this engine build haha. As you can tell I am sure but give me a break... I am only 17 and I was a very stupid chevy boy for many years. Finally switched to Mopar and learned what power and knowledge was haha. Thank you all!