Guest V8Z Posted September 20, 2006 Share Posted September 20, 2006 I found roller lifters, roller rockers and a cam shaft combo deal for a great price and wanted to see if it sounds like a good set up or not, any fore seen problems and if the cam will work well with the fast burn heads. cam is a pro comp as is the other components and the cam specs are listed below.All this is retro fit for the older blocks. What HP do you think this will obtain?????Spending alot of money and want to make sure before I purchase all this stuff. My engine part # is 10067353 and the specs are: Horsepower: 249 HP @ 5,000 RPM At Stock set up Torque: 304 Ft/Lbs @ 3,500 RPM At Stock set up Compression Ratio: 8.50 to 1 At Stock set up Block: 4 – Bolt, 2 Piece Rear Seal, 4.000†Bore Crankshaft: Cast Nodular 3.480†Stroke Heads:GMPP Fast burn 62cc ( replaced cast iron heads) Valves: 2.000†/ 1.550" Camshaft lift: 0.502†/ 0.510†Hydraulic (replaced OEM factory cam) Intake: Eldelbrock Dual plan vortec style Carb: Holley 670cfm Camshaft Specification Table Part Number 12-423-8 Engine 1955-1998 Chevrolet 262ci-400ci 8cyl. Grind Number CS XR276HR-10 Description Intake Exhaust Valve Adjustment 0 0 Gross Valve Lift 0.502 0.51 Duration At 0.006 Tappet Lift 276 282 Valve Timing At 0.006 Open Close Intake 32 64 Exhaust 75 27 These Specs Are For The Cam Installed At 106 Intake CL Intake Exhaust Duration At 0.05 224 230 Lobe Lift 0.335 0.34 Lobe Separation 110 Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted September 20, 2006 Share Posted September 20, 2006 Well, I'm going to guess that it'll make about 400HP at the flywheel, which will be a substantial increase over what you have. I'd bet money your grinning when you drive it! Quote Link to comment Share on other sites More sharing options...
280zwitha383 Posted September 21, 2006 Share Posted September 21, 2006 Well at first I thought 400hp with those heads, compression ratio, and cam was waay too much. However, I'm sure you've seen the articles where this cam or something like it was swapped into a vortec engine (with roller cam and carb.) and made something to the tune of 400hp give or take. The fast burn heads I ASSume flow better than the vortecs so I guess that's possible. Your 8.5:1 might hurt you a little, however please let us know if it doesn't because I'm curious. BTW, Desktop Dyno gives you 349hp at 5k and 408tq at 3.5k with the exact setup you have including large tube headers. Quote Link to comment Share on other sites More sharing options...
Guest V8Z Posted September 21, 2006 Share Posted September 21, 2006 349hp at rear wheels or flywheel? Quote Link to comment Share on other sites More sharing options...
280zwitha383 Posted September 24, 2006 Share Posted September 24, 2006 Flywheel. Desktop Dyno does not have provisions for calculating wheel hp and probably never will. Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted September 24, 2006 Share Posted September 24, 2006 You need more compresion with that cam to make the HP, or a tighter lobe center, like a 108, it'll fill the cylinders alittle better. I've never been a fan of wide lobe center cam for anything except blower/turbo or RV cams. Quote Link to comment Share on other sites More sharing options...
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