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Old 08-13-2009, 08:02 PM
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want to build a 383

i have a 1997 chevy k1500 with the 5.7 in it, i want to build a 383 for it. i am not a master mechanic but i am sure i can do it, is there any sugestions for the amount of horsepower i need for 40" tires and how to achieve it

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Old 08-13-2009, 08:15 PM
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My suggestion is to try to let off the drugs for awhile................ It may clear your thinking my freind.
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Old 08-13-2009, 08:17 PM
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Hotrod motor and off road tires? Why?
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Old 08-13-2009, 08:24 PM
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You can turn 40 inch tires with a 180hp engine. It just depends on what you want with the truck. Do you want serious mudding capability? Or are you looking for lots of sound and looks without actually caring about offroad performance?

If you want power then build the 383 and bolt on a supercharger. Even a small 177ci blower will provide a dramatic increase in power. I bolted a 142 on a 350 and the difference was impressive.
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Old 08-13-2009, 08:26 PM
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come on guys im serious, im just looking for some more horsepower and torque for the larger tires
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Old 08-13-2009, 08:30 PM
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im a pure function kinda guy so looks and sound i could care less about, and yes i looking for a serious mudder, what will a supercharger do to emissions
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Old 08-13-2009, 08:37 PM
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I always thought a "383" was a Mopar engine, I could be totally wrong again. I am sorry for the rude remark. If you have a chevy small block at your hands that would be the best way to go but you may want to start with a four bolt main crank bearing block, it will stand up to anything, high perf.parts are available and most info about how and why is right there.
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Old 08-13-2009, 08:41 PM
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You got a leaky spark tube...
 
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Quote:
Originally Posted by bill4
what will a supercharger do to emissions
Not sure, never had to worry about emissions testing here. I don't imagine a supercharger or a 383 would be too friendly to emissions though.
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Old 08-13-2009, 08:42 PM
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God hates cowards but................ he loves superchargers and there emissions. As long as you are good! along with that 383
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Old 08-13-2009, 08:48 PM
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thanks i will look into super chargers more, and drop my oil pan to see if my block is two or four bolt, thanks for the tips if yall think of anything else please post
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Old 08-13-2009, 09:00 PM
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Despite what saitek says.....383 is definatly stroked sbc by the way....i have a friend that runs great in mud bogs in street class in his daily driver 85 long bed with a 383.The best way i had it explained to me by the machine shop was torque gets you there hp keeps you there and we have 490ft lbs of torque 465hp out of his on the engine dyno and being as we cant run superchargers in bogs around here it dont have one. As far as turning 40s he can hit the road without touching the breaks he smokes 39.5x18.50 boggers through 2nd gear with 4.56 gears and still drives it 275 miles to nags head every year to drive on the beach so its still reliable. So from personal experience its easily achievable but the machine shop also said next time look into a 400 4bolt main and making a 406....more torque.....and it sounds really good and performs
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Old 08-13-2009, 09:00 PM
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Quote:
Originally Posted by saitek5678
I always thought a "383" was a Mopar engine, I could be totally wrong again.
"383" as it relates to Chevy small blocks is the most common stroker SBC engine in the world.

In the early days, a 400 (3.75" stroke) crank was turned down to 2.450" (from 2.650") on the main journals to fit the 350 SBC. At 0.030" over bore (4.030"), the displacement is rounded to 383 cid.

Now days, all the crank manufacturers make 3.75" stroke cranks designed from the get-go to work in a 350 SBC, usually w/the other-than-400 Gen I/II SBC rod legnth of 5.7, rather than the 400's 5.565" rod.

Nada to do w/a MOPAR.
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Old 08-13-2009, 09:04 PM
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Pretty much what i was thinking.....sounds like someone else needs to lay off the drugs
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Old 08-13-2009, 09:07 PM
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my appology , There has never been to my knowledge a stock chev small block 383, I stand corrected. Hey sounds like we have some promise here!
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Old 08-13-2009, 09:09 PM
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saitek5678

wow almost 28 years into this buisness and I feel like a retard again,........................oh well
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