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Author Topic:   383
Dirt Freak

Total posts: 370
posted March 19, 2005 03:35 PM  
I want to build a good 383 for my truck. I know a lot of people hate the 5.565 rods and use the 5.7 rods for a 383 but i could save $100 on pistons if i used the 5.565 i dont want a time bomb is this a very smart move? I want a cheap motor on limited budget but no time bombs. I want a motor that will last for years. Any suggestions? thanks Depends what piston i go with what head i will go with but im shooting for 10.5:1.

unregistered Total posts: 370
posted March 20, 2005 07:18 AM           send a private message to 19J   Edit/Delete Message   Reply w/QuoteBBBBBB
Those rods are fine to 5500 rpm or so in a stock application.

10.5-1 though isnt good on todays pump gas, and deffinitely wont run well.

a 383 is a gas hog of a motor, I wouldnt put on in my truck for free if I had a 350 sitting around.

a 350 with a good q jet carb and a rv cam would be my choice for a motor to last years, and save you money now building it over a 383.

Dirt Freak

Total posts: 370
posted March 21, 2005 05:45 PM  
Anyone elses opinion?

Dirt Roller

Total posts: 8
posted March 22, 2005 07:41 AM  
19j, 383s are good engines if you take the time to match parts that work together well, i have built several and found that i get more tourqe with useing 6 in rods, you have to do a little grinding on the block side of the oil pan flange to clear the rod cap bolts, and run a small circle cam, but you want believe the difference in tourqe and hp.

Dirt Full Roller

Total posts: 33
posted March 22, 2005 07:50 AM  
Had 5.565 rod 383 several years ago. It was in a 3/4 ton 4x4 for about 5 years and we ran the heck out of it. Eventually it made its way into 2 different bomber cars and then one street stock that won a championship with it (all we did is change the cam and put some double humps on it). Had one ring and bearing kit during that time. Nothing special, cheap cast pistons. We still have the motor sitting around (needs a rebuild). Always thought it would give out with those ****py short rods and cheapo pistons. Never did though.

Dirt Forum Champ
Total posts: 2007
posted March 22, 2005 07:55 AM  
The short rods wont make that much difference in a stock application. If it were for the race car I'd definetly say get longer rods. But think about it this way the stock 400 had those short rods in it and they were fine in street vehicles. Woudl the longer 5.7 rod be better, technically yes but I dont think youd see the difference in that application.

I would get the compression down though, I wouldnt go over 9:1 in a tow vehicle unless you want to run realyl good gas

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