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Cheap 283 mods/hop-ups

15K views 19 replies 12 participants last post by  richietables 
#1 ·
1965 malibu, 283", turbo 350 trans with 10" convertor, 3.73 gears, 26" tall rear tires, holley dual plane, 600cfm carb. 1 5/8 headers

I'm looking for some cheap 283 speed tricks.

Can I install 1.6 ratio rockers and gain?

Carb spacer?

valve lash?

Larger cam (not wanting to change springs at this time)?
 
#4 ·
If your cam is still stock, that's where you'll find the most hp per $. Something around 220º @ .050 would give a noticeable mid/upper rpm increase without killing too much low rpm power. Next up would be heads (or heads AND a 350 shortblock :). The items you mentioned would probably get you a couple horses each with a stock cam.
 
G
#6 ·
I'mmm herrrre!!

Sure, get her up to 10 to 1 using worked over and planed to 50 cc chambered 305HO, -601 heads, Fel-pro's #1094 .015" thick shim headgaskets, stock flat-top pistons and install this solid lifter cam from PAW that I figure is this Elgin cam.....

E-1133-P; 280/246, 108/106, .498”, Lash, .030” and .030”

in it from PAW for like less than $50 when I bought mine and have more fun than the Law will allow!

PAW calls it their 264/246 cam so go figure IF they are still selling it and I have one in my bedroom closet for my next junk292/301 engine that I am gathering parts for!

You will be looking at 385 hp at 6500 rpm and 350 t at 5,000 rpm per D2k?

pdq67

PS., you put 64 cc Vortec heads on her and your CR will be about 8 to 1 unless you install stock 1/8" tall, 1/2 round, domed pistons.

I know all about this stuff b/c of my old junk301 from years gone by!

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#7 ·
Tommy,

Your engine is SCREAMING for better heads and cam. However, you will not get much of a car if you want to run stock springs
 
#9 ·
my 67 283 has stock heads (1.94 1.5 valves if i remember correctly), hooker hk32(i think thats the part number) 1 5/8 headers, hei distributor, weiand al intake with edelbrock 600cfm carb with manual secondaries, supposedly has a 485 lift cam already installed, dont know much more about it than that, and electric fan, all sitting in front of a muncie. hopefully i at least have 283 hp at the flywheel. it came with 195 hp stock

edit- pdq what should 283s like these be shifted at? i see your hp quote is at 6500 rpm, but i was figuring on shifting at 6k
 
G
#15 ·
Only one or MAYBE two of 283 engines came out w/ the -461x heads w/ 1.94"/1.50" valves and it was in the early '60's so all the others ran heads like the power pack w/ 1.72"/1.50" valves.

Or smaller intake port jobbers than them.

You can run 2.02"/1.60" valve double-hump heads on a 283 IF you use a lift limited cam that's from .450" and shorter! But you'd better run domed pistons and shim headgaskets b/c your CR will be down around 8.2 or so w/ flat-tops!

The 283 I finally got that was my Nephew's had a good set of big valve 291 heads on it, flat-tops and a TRW 308/246, .433" lift hi-cam in it! I figure the reason he got the old junk car w/ it in it was b/c it wouldn't pull me off my Throne, it was so low CR'd!!

pdq67

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#20 ·
Talk about reviving an old thread! Some 305 heads, perhaps?? Wild Bill could help with that decision! If you didn't give up on it and get a 383 or something. --Rich
 
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