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Old 07-15-2011, 03:03 AM
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400 smallblock desktop dyno please

hey guys, im marshall, long time reader first time poster, im in new zealand so may posts and replies may be delayed with the time difference. ill post a proper introduction in the introduction section with pics of my car and work done but at the mo im just wondering whos running a similar setup to this and what sorta power itd produce...maybe some desktop dyno figures or real world figures from similar setups, just curious as to what my engine might be putting out, its nothing fancy at the mo

400 chev bored .030
stock stroke
edelbrock 750 vac sec carb
edelbrock performer manifold
pro topline torker heads, (1.94 valve, 167cc, 76cc combustion chambers, de-burred and bowl blend work, exhaust ports polished and both sides port matched but not gasket matched)
pistons are stock dished
crane 272 energizer cam hydraulic flat tappet
block huggers into true twin 2 1/4" exhaust no crossover pipe
pistons are down the bores about 060 and im thinking around 8.5 comp ratio

t700 trans with transgo shift and junior kits and 3-4 clutch update kit
stock torque converter
3.55 limited slip salisbury rear end,
26.5" tyres

car is a 52 chevy 4 door
runs at 2000rpm at 60mph in overdrive and about 1500rpm at 30 mph in 3rd

its just a real super mild setup, was aiming for a mid range torquey super reliable street car with the torque band right around about 2500rpm where the revs would be on the open road and when i chop it down to overtake, i thought thatd keep manifold vacuum high and be good for open road economy, from research around the web i thought it might be quite a complimentary setup. let me know if i need more information
cheers heaps guys
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Old 07-15-2011, 03:13 AM
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cam is 272 duration, 216@.05, 110 seperation, .454 lift by the way
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Old 07-15-2011, 07:13 AM
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I would guess 360hp/450ftlbs.

I think long tube headers and 2-1/2 exhaust would help make more power. I think about 25hp/25ftlbs more.

how does your ignition timing curve look? initial, total mechanical, vacuum advance, ported or manifold vacuum advance? read this.
http://www.corvette-restoration.com/.../Timing101.pdf
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Old 07-15-2011, 02:47 PM
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hey, yea thanks heaps for that. yea the exhaust is a bit of a sore point how i got ripped off on it..dont think ill go into it at the mo as youd haveto see the car haha. i started makin some tri-y headers for it but being i kept the stock front end around the steering box and drag link, and being RHD theres absolutely no room for them aye, theres barely enough room for the block huggers once they were modified. i told the exhaust shop theyre the experts and to put whatever size tube woulda been good for torque and thats what they done....so for 2grand ill just haveto deal with it and go somewhere else next time haha
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Old 07-15-2011, 02:53 PM
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havent really sorted it since i put the new heads on, ignition timings one of my fave things to read about here haha but i aint seen that atrticle! looks real good, easy to read, explained well, im gonna print it right now and go have a play today, let you know how i get on
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Old 07-23-2011, 04:44 PM
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haha, bent a pushrod last weekend, just after i had enough time to set the timing to 12* initial, i see thats apparently what cams with my duration a 50 thou like so thought id start there first. yea some of the pushrod guide holes were slightly oval, iv sorted it now with guideplates but have another problem, fuel delivery problems, lack of pressure to the carb and the bowls arent filling, ill start a new thread for this one though

Last edited by 52chevkiwi; 07-23-2011 at 04:46 PM. Reason: bit more info, someone might be abl to help without me starting another thread
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