73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Performance => Topic started by: slideways on September 04, 2019, 06:43:07 PM
-
So I’m restoring my father in laws 83 K10 frame up and originally it had a 305 at some point swapped with a backyard build 350 that he is clueless about but supposedly it’s got very low time on it and the 700r4 has paperwork to back it’s rebuikd also. I gingerly drove it home so I couldn’t get a feel for it before I tore it down but it does run and idle very nicely and has over 50psi oil pressure. All I can tell is that it has a QJet and 8920 heads which I’m reading are nothing special but I guess not horrible. I’m going to guess it has stock pistons which supposedly puts it around 8:5-1 My plan is to stick a 262 or 268 torque making can in that hopefully has a lope idle. I’m not sure which one yet. Also ditched the cast manifolds for long tubes and will be adding a cheap manifold like the Performer or Jegs Chanpion.
Any suggestions welcome. But what type of numbers should I expect from that type of setup? I’d like vortex’s but not yet. Need to build the rest of the truck first.
Thanks for the thoughts.
-
First, read through Camshaft/ intake/ HEI upgrade questions! (http://forum.73-87chevytrucks.com/smforum/index.php?topic=26161.msg217465#msg217465)
Second, enter the engine parameters along with your specific requirements into the CamQuest (http://www.camquest.com/) engine simulator on the Comp Cams website for camshaft recommendations and application notes, based on Comp Cams' offerings. The simulations produced are surprisingly close to reality.
Last, peruse the torque/horsepower curves generated to determine the most suitable cam profile(s) for your rig. Be patient and realistic.
-
Welcome to the site.