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Old 01-22-2005, 01:41 AM
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any one got desktop dyno plees help

I do not wont to get the program just to build one motor It cuts in to the hot rod funds so if sum one has it and is bored I would greatly appreciate it.So heres the plan small block chevy 400 stock short block,stock vorteck heads with steam holes of course,performer air gap intake,625cfm street demon carb,HEI with flame thrower module and a 50,000 volt coil,headers 1.58" primary's and 3" exhaust with a balance pipe,crane Saturday night special cam with 470 lift 280 duration 224@0.050 and a 106*LSA It's 2,500-5,500 rpm,electric water pump,roads lifters and roller rockers.I will be using a 2,500-2,800 RPM stall and 3.73 gears.This is for my 77 chevy truck that I will be using for 4x4 mud drags and driving every day to work so it cant get to crazy but if any one has a beater idea or if something would match up beater pleas share your idea and sum one pleas dyno this for me before I throw down the cash I cant afford to build it twice.

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Old 01-22-2005, 05:50 PM's Avatar Moderator
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Need a lot more info to do a good calc but I assumed 8.5:1 compression, 2.02 Intake valves, 1.60 exhaust valves, and a few other items and came up with this

Nice flat torque curve and good bottom end hp.
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Old 01-22-2005, 10:24 PM
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I will be using vorteck heads of a 96 van they halve 1.94 intake 1.5 exhaust and 64cc chambers they flow 234cfm intake and i think 187 cfm exhaust but i might be wrong on the exhaust.I think the 64cc chamber should raise the compression to 9.3 and when I race I will be using 130 octane jet fuel and bumping the timing to 38* total timing at 3,000 RPM what other info could you use and is there any part you think I should change I meant to say performer RPM air gap thank you for your help.

I was going to use a high stall but thanks to you and your info I think I am going to use a 2,000 stall thats going to make it a lot easier to drive thanks.
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