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Old 07-07-2004, 10:23 PM   #1
Jonny-K5
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how much power can a stock short block 350 handle?

i want to do some mods to a 350 powered pickup i have. i basically want to make as much power as i can for 1/4 mile.
how much can i get away with before i have to start tearing into the short block? the engine has about 100 miles on it, stock spec rebuild with quality parts, 4 bolt main.i'd like to leave the stock dished pistons and cast crank.
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Old 07-07-2004, 10:36 PM   #2
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Re: how much power can a stock short block 350 handle?

Besides the cam, intake, and headers, you may want too look into heads. If you currrently have 76cc heads, think 64cc. that'll bring up your compression. If you're just talking a 1/4 mile run, well, NOS is hard too beat for a quick burst of power. Rear gears are a big factor in racing also.
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Old 07-07-2004, 11:45 PM   #3
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Re: how much power can a stock short block 350 handle?

I would not thing anyhting over 400hp on the stock short block would be very reliable at all...The stock rotating assemblies leave much to be desired when it comes to high-rpm, high horse power build-ups..

Chris
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Old 07-08-2004, 12:00 AM   #4
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Re: how much power can a stock short block 350 handle?

As was said, the stock bottom end is good into the upper 300+. Im running about 330hp on my 4-bolt main and it seed 6500rpm's quite often. Heres a pretty good link on a basic performance build using a stock Gm crate motor as a starting point.
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Old 07-08-2004, 12:23 AM   #5
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Re: how much power can a stock short block 350 handle?

A better question might be "How long will it run"?.You can get tremendous horsepower from a small block chevy--but after 400 hp,as other posts have stated,it starts to become a reliability issue--even race motors blow up fairly quickly even though they are put together with the best of care and the best parts--there's a lot to be said for longevity and reliability both on and off the road. [img]/forums/images/graemlins/crazy.gif[/img]
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Old 07-08-2004, 12:25 AM   #6
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Re: how much power can a stock short block 350 handle?

A good balance job and high quality fasteners goes a long way here.

Using a rod bolt stretch gauge instead of torquing them helps, too.
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Old 07-08-2004, 12:48 AM   #7
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Re: how much power can a stock short block 350 handle?

In all my engines I install a MSD 6AL spark box. (Except for my boat witch is a MSD 6M-2) I do so to keep my motors from reving past 5000 rpm's. The small block Chevy can go beyond this by far, however reliability will suffer in the long run, especially in a stock shortblock. A 4 bolt and for that matter a 2 bolt main block will handle quite a bit of HP and Torque if it not reved to high.

As far a heads go, I like these; http://www.jegs.com/cgi-bin/ncommerc...mp;prmenbr=361

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Old 07-08-2004, 01:11 AM   #8
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Re: how much power can a stock short block 350 handle?

I agree, and I have a 5,000 RPM pill in my MSD 6AL as well. No reason to see any higher RPM than that, although it does ruin the fun in those muddy sections.
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Old 07-08-2004, 01:19 AM   #9
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Re: how much power can a stock short block 350 handle?

theres a few cirle track guys here that are running 500+ on a stock 4 bolt block. not sure what fasterners, im sure not stock [img]/forums/images/graemlins/yikes.gif[/img] these motors run at 7000+ rpm all day long

not me though. 6000 is plenty high for me
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Old 07-08-2004, 01:38 AM   #10
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Re: how much power can a stock short block 350 handle?

boost it & juice it.
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