new motor street strip 388 - Impala Tech
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post #1 of 8 (permalink) Old 07-23-2012, 01:38 AM Thread Starter
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new motor street strip 388

hey i kinda changed the direction of my impala i have a .060 350 with 3.75 crank with h beam rods 3.5 cc dome pistons a comp 305h cam(.560 lift with 1.6 rockers, with dart iron eagle platnum heads with 200 cc intake 72 combustion chambers 10:1 comp, th350 3500 stall 12 bolt rear end with 3.90 gears with slick what kind of hp would you all rate it at and what is my possible e.ts in this 4000 pound car thanks~casey
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post #2 of 8 (permalink) Old 07-23-2012, 05:15 PM
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I'll take an educated guess because I like these games and I have a 383 myself.
BTW - I used to run the 292 cam in a different engine, that 305 is big on Net Duration and nasty.

Motor HP = 450-480
(not sure of your intake and headers)

ET = 12.80 - 12.90

HOW A NOVICE REBUILDS A 66 IMPALA CONVERTIBLE:
http://www.impalas.net/forums/blog.php?u=1432
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post #3 of 8 (permalink) Old 07-23-2012, 06:20 PM Thread Starter
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i have old mr gasket headers 13/4s primaries into a long 3 inch collector there tuned length and i have a tall super victor intake with a 850 its a lil big but better for top end
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post #4 of 8 (permalink) Old 07-23-2012, 06:22 PM Thread Starter
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what would you recommend to get it into low 12s high 11s i could always get a roller cam that would help a lot wouldn't you think? then do some porting to those heads too
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post #5 of 8 (permalink) Old 07-23-2012, 09:59 PM
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Nitrous works and is the cheapest way to meet your goals.

I have an Impala that runs in the low nines. However it isn't competitive in any NHRA class due to it's weight, and lack of aerodynamics. It was more of my reproving what McDonnell-Douglas had already proven back in 1961 with the F-4. Put a big enough motor in it and you can even get a brick to fly.

Big Dave
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post #6 of 8 (permalink) Old 07-23-2012, 10:17 PM Thread Starter
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without using No2 could i achive my goal with a lower rearend gear say 4.11 or 4.56 with a even larger solid flat tappet or a roller grind maybe add a 2 inch spacer under the carb i know i might be over estimating but ive seen builds very similar crack out right over 500 hp and 470 ft.pnnds my car has a stock interior and no real options except a/c but im getting rid of it so it might be a little lighter than i thought thank you guys for all your help ~casey
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post #7 of 8 (permalink) Old 07-24-2012, 02:11 PM
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just guessing from your combo but I kinda think that some mid-low 12's are attainable with a properly sized roller cam, lifter & spring combo. That's not exactly cheap though.

Are those Forged pistons or the Hypereutectic ones? The hyper' ones have an RPM limit right? (piston speed for Big Dave!) Would hate to see one give out on your if you're camming for 6500-6800rpm.

HOW A NOVICE REBUILDS A 66 IMPALA CONVERTIBLE:
http://www.impalas.net/forums/blog.php?u=1432
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post #8 of 8 (permalink) Old 07-24-2012, 02:57 PM Thread Starter
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i bought the pistons from my uncle there icon forged pistons ive been doing some research and im thinking of going with the biggest solid cam i can find and some head porting maybe nitrous in the future my cams power range is 3000-7000
thanks guys
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