question on horsepower from build

Discussion in 'Engine Topic' started by cutty, Jan 16, 2012.

  1. cutty

    cutty Veteran Member

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    350 been bored 30 over with flat tops, comp cam 480/480 cam(brand new just put in)heads are double humps ported and polish( pretty much to the max) and bowels have been cleaned up,has screwed in studs with guide plates and new springs,new comp cam hardened push rods,1.5 roller rockers,edelbrock rpm intake with a holley 750 vac secondaries carb, 1 3/4 headers,full msd ign, what kind of power do you think it might have, its got me wondering, i know what id like to see, at least 290,
     
  2. ZS10

    ZS10 Moderator Staff Member Lifetime Gold Member

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    I'd think you can count on around 325hp, especially with your cleaned up bowels.
     
  3. cutty

    cutty Veteran Member

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    i had the heads on my 406 race motor, but decide to go more street, 13.1 comp isnt vary friendly
     
  4. badazz70z28

    badazz70z28 Veteran Member

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    i have almost the same combo, 355 w/ flattops, .480 lift cam but i have the phase2 bowtie heads, most everyone who chimed in on my combo said around 375 hp.being in a vega i think i have a good power to weight ratio:bowtie:
     
  5. High Country Z

    High Country Z Veteran Member

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    I run a similar combo but with the 76cc 487 heads, the engine made 340 hp on the dyno.
     
  6. cutty

    cutty Veteran Member

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    thanks for the input,
     
  7. cutty

    cutty Veteran Member

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    little update on my motor, stuffed it in to my cutlass as my maro isnt done yet,car with driver was 3498 pounds, car had 273 rear gear, stall is 2000,ran in to some trouble as in my 4's on my holley werent working so was running on 2 barrel,ive seen snails move faster out of the hole lol, crossing the traps at 5800 in 2nd gear, what gear would be good for strip street as my camaro has 308s in it, id like to be crossing the traps in 3rd at or around 6000 rpms, anyways here the time it ran

    60' 2.76
    330' 6.545
    1/8 9.54
    mph 78.60
    990 12.021
    1/4 14.001
    mph 103.30
     
  8. rustbucket79

    rustbucket79 Veteran Member

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    The ET/MPH is telling you the engine has some decent potential. Get the gearing/converter correct (very important on the smaller engines) and it will reward you with low 13's, possibly even high 12's.:cool:
     
  9. middleagecrisis

    middleagecrisis Veteran Member

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    I would guestimate your flywheel horsepower at ~350-370. Fix your holley to get full opening and run the 2.73's and keep it in second gear. Going to 4.10's will give you more bottome end (and possibly loss of traction), but will keep your RPM at ~5800 (depending on tire size) at the end of the quarter. The fact that your turning 103 now at the top end suggest that the car is capable of mid 13's easily. The stall speed is a little low for decent 60 foot times, but I wouldn't change it out.
     
  10. cutty

    cutty Veteran Member

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