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Author Topic:   One more time... 350 vs. 383
Speed Racer X
Dirt Full Roller

Total posts: 61
posted November 26, 2002 09:56 PM
We are in the process of buildin a new motor for our 3400 lb. Bomber car. We have a virgin 4 bolt 350 block ready for the machine shop. Planning on .030 over on the clyinders, line bore the mains, decking the block, and balancing the rotating assembly. We have a good set of double hump heads (2.02 intake valves) that are mildly ported. We are required to run stock cast iron intake and exhaust mainfolds and list #1850 Holley. We were planning on buying a Scat 9000 series 383 internally balanced crank, 6 inch rods, and KB hyper .150 dome pistons (12.3 compression), but money is starting to get tight. We have a good stock crank and rods, and buy using them and staying a 350 we can save about $500. Last year ran a tired 350 and were a 5th or 6th place car (the top 3 were all healthy 406's). Also this motor needs to last least 2 or 3 seasons (freshened up each year). I'm open to any suggestions Thanks!!!

jhon hollomon
Dirt Maniac

Total posts: 181
posted November 26, 2002 11:07 PM
If you freshen up your stock setup you will have a pretty strong motor and will have more money to spend elseware. On the other hand, you build a stout 383 and you'll have a motor that will scream!

Dirt Administrator

Total posts: 5556
posted November 27, 2002 06:47 AM UIN: 16262997
383 parts arent much more than 350 pieces now a days anyway. I suggest the 383 for the heavier car.


Dirt Freak

Total posts: 215
posted November 27, 2002 07:24 AM
383 without a doubt, plan on 2 to 3 years on this engine?? You must have better luck than me. 400 cranks are hardest on rod bearings, keep an eye on them. sixwillwin

Dirt Freak

Total posts: 237
posted November 27, 2002 07:33 AM
383. Lots of torque to pull a heavier car around.

Dirt Maniac

Total posts: 139
posted November 27, 2002 11:38 AM
I think you answered your own question. Build
the good motor. Over 2-3 yrs your $500 is really only $166 per year. That's not much of an investment that way. Plus if you build a good lower end it sould work at least that long. The benifits of a 383 will fare out way a 350. More horsepower!!! In that heavy of a car, you can use all you can get. I have both a 383 and a 360. We change motors for the track conditions either to kill HP or use more. I would build a 383 1ST. Hope this helps. ltr spde

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