240zprace Posted November 7, 2007 Share Posted November 7, 2007 Sbc 400 Block Bored 30 Over 4 Bolt Main Steel 350 Crank Hb&m 6" Rods Kb Forge Pistons Compcam 520 In/ 540 Ex Moly Perf Rings Perf Cam/ Main Bearings Perf Head Gasket Vortec Aluminum Heads Edelbrock Victor Jr Intake Roller Rockers Holley 750 Cfm Carb 10.1 compression I'm New To The V8 World.....will This Set Up Produce 400+hp Or Is This Horseshit.... Quote Link to comment Share on other sites More sharing options...
Savage42 Posted November 7, 2007 Share Posted November 7, 2007 I seriously don't think it would be 400+ HP. I'd bet it's safe to say 350-375HP, but the thing about 400 SBCs is they have massive torque. My buddy had a 400 SBC in his 240 for 15 years, Pink Rods, forged pistons, serious head work, etc and it was about 325HP but put out 500 ft lbs torque. Torque is king!! Quote Link to comment Share on other sites More sharing options...
jt1 Posted November 7, 2007 Share Posted November 7, 2007 You need to give some more specs on the cam, duration at 0.050 and the LSA, and some flow numbers on the heads for somebody to make a good guess. jt Quote Link to comment Share on other sites More sharing options...
dustin280zx Posted November 7, 2007 Share Posted November 7, 2007 I would suggest some better heads like afr. Quote Link to comment Share on other sites More sharing options...
jgkurz Posted November 7, 2007 Share Posted November 7, 2007 It might make 400HP with the Vortec heads. The cam will be the key component. Take a look at this article for reference. http://www.rustpuppy.org/chp/Welcome.html Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted November 7, 2007 Share Posted November 7, 2007 It is a 400 block with a 350 crank. So that is what, a 377? Pretty big lift numbers on the cam. Try a search on 377. Here is one that the guy was estimating 430 HP http://forums.hybridz.org/showthread.php?t=66497 This one looks more race oriented http://forums.hybridz.org/showthread.php?t=85468&highlight=377+dyno So all that work and they still make less HP than a stock LS2 motor. Damn. Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted November 7, 2007 Share Posted November 7, 2007 If in doubt, install a NOS cheater plate system. My friends 355 chevy engine with vortech heads using a NOS designed cam shaft is putting out 543 RWHP on a 150 shot of the juice. The key like it is stated above is the camshaft. John Quote Link to comment Share on other sites More sharing options...
240zprace Posted November 7, 2007 Author Share Posted November 7, 2007 i'll try to get more info on motor... Quote Link to comment Share on other sites More sharing options...
pparaska Posted November 7, 2007 Share Posted November 7, 2007 IMO, There's a serious mismatch of components if an engine with 10:1 compression and that much lift on the cam can't make 1.1 to 1.2 hp/ci. I'd guess that with good heads you should be at 400hp easily if it truly is a 400, but if it's a 377, you ought to get 400+hp if the build has good heads and the cam and intake are matched to the head flow and its TUNED WELL! Quote Link to comment Share on other sites More sharing options...
silicone boy Posted November 7, 2007 Share Posted November 7, 2007 IMO, There's a serious mismatch of components if an engine with 10:1 compression and that much lift on the cam can't make 1.1 to 1.2 hp/ci.I'd guess that with good heads you should be at 400hp easily if it truly is a 400, but if it's a 377, you ought to get 400+hp if the build has good heads and the cam and intake are matched to the head flow and its TUNED WELL! Just bench racing, but if it's a 377, I would think you are just short but close enough. Depends on the cam, as others have said. It could be a lot of fun depending on what you are using it for. Quote Link to comment Share on other sites More sharing options...
240zprace Posted November 8, 2007 Author Share Posted November 8, 2007 Sbc 400 Block Bored 30 Over4 Bolt Main Steel 350 Crank Hb&m 6" Rods Kb Forge Pistons Compcam 520 In/ 540 Ex Moly Perf Rings Perf Cam/ Main Bearings Perf Head Gasket Vortec Aluminum Heads Edelbrock Victor Jr Intake Roller Rockers Holley 750 Cfm Carb 10.1 compression I'm New To The V8 World.....will This Set Up Produce 400+hp Or Is This Horseshit.... got some more imfo on the 377motor.... eagle steel 350 crank eagle h-beam 6" rods comp push rods promag roller rockers gm angleport fast burn heads (alum)62cc manley valves comp cam...gross lift 520 intake/ 540 exhaust, duration@.015- 282int/ 292exh does this help a little..... Quote Link to comment Share on other sites More sharing options...
silicone boy Posted November 8, 2007 Share Posted November 8, 2007 got some more imfo on the 377motor....eagle steel 350 crank eagle h-beam 6" rods comp push rods promag roller rockers gm angleport fast burn heads (alum)62cc manley valves comp cam...gross lift 520 intake/ 540 exhaust, duration@.015- 282int/ 292exh does this help a little..... Those Fastburns are nice. I would say you are there. Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted November 8, 2007 Administrators Share Posted November 8, 2007 In short, yes it can produce 400 HP. Will "your" quoted particular engine produce that sort of “peak” power? That entirely depends on how well thought out the combination of parts are, (and as already mentioned, including the “exact” cam specs) AND how well that combination is dialed in. The long version. Yes, 377 Cubic inches of displacement, regardless of the badge on the valve cover, is more than capable of producing 400+ HP. HOW it produces that 400+ HP will be depicted by the “combination” of the parts and how they function in complimenting each other without being under or overly aggressive for the role this engine will play in your car. Another often overlooked aspect is the “tuning” or “dialing in” of whatever combination. Just bolting on parts with “stage whatever” cam is no guarantee that the power plant will perform any better than a stock 5 liter TBI truck engine. The amount of time and care applied to the tune of those parts after it is up and running, (i.e. the ignition timing curve/map and Air Fuel Ratios), along with time spent researching the compatibility of the parts to be used, (parts chosen to meet a particular demeanor that owner/driver wishes the car to posses), is key in getting good performance. It has been proven time and again, many bargain built/assembled engines out performing engines with more aggressive and expensive parts, merely because the parts chosen for the budget project were a better match for each other and care was taken in "dialing in" that combination instead of just tossing a credit card to Summit racing for all the “Cool” parts. Good luck, Paul Quote Link to comment Share on other sites More sharing options...
jt1 Posted November 9, 2007 Share Posted November 9, 2007 I agree, properly tuned 400hp shouldn't be a problem. jt Quote Link to comment Share on other sites More sharing options...
LS1 240Z Posted November 10, 2007 Share Posted November 10, 2007 ok.. so you COULD build that.. or you could buy an LS1 and put a cam in it and do 400 REAR wheel horse power with just a cam swap through an automatic transmission... or you could buy an even cheaper LQ4 6.0 truck motor and make even more hp.. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.