Thread: Which pistons?

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which pistons should i use for my 283, i don't know about the dome height an compression distance


Brand Federal Mogul
Keith Black/KB Pistons

Product Line
Federal Mogul Cast Pistons
Keith Black Hypereutectic Pistons

Part #
STL-235P40
UEM-KB166040-8

Price
$16.69
$274.69



Description
Piston, Cast, Flat Top, 3.915 in.
Bore, 5/ 64 in., 5/ 64 in., 3/ 16 in.
Ring Grooves, Chevy, 283, Each

Pistons, Hypereutectic, Dome Top,
3.915 in. Bore, 5/ 64 in., 5/ 64 in.,
3/ 16 in. Ring Grooves, Chevy, 283, Se...






Bore (in)
3.915 in.
3.915 in.

Bore (mm)
99.441mm
99.441mm

Compression Distance (in)
1.780 in.
1.805 in.

Dome Height (in)
-
0.170 in.

Notes
-
All other years not legal for sale or use on pollution-controlled vehicles.


Oil Ring Thickness
3/16 in.
3/16 in.

Pin Diameter (in)
0.927 in.
0.927 in.

Piston Head Volume (cc)
-
- 4.00cc

Piston Material
Cast aluminum
Hypereutectic aluminum

Piston Style
Flat
Dome


Quantity
Sold individually.
Sold as a set of 8.

Second Ring Thickness
5/64 in.
5/64 in.

Top Ring Thickness
5/64 in.
5/64 in.

Valve Reliefs
Four
Two

Wrist Pin Style
Press fit
Floating

According to the 'guru's',,,street engines perform best with a dynamic compression ratio of 7.5-8.5 on 91 or better octane.Race engines using higher octane race gas can go 8.8-9.1,or higher if the rest of the engine is built accordingly.And best 'quench'(piston/head clearance) should be between .035-.045.Piston to valve safty margin is .100.Butttt,,,,if you are building an all-out race engine,ignore all the above.But you better know how to properly check these clearances if you are.Just my 2cents worth,good luck.

thanks a lot

Sorry,I got wraped up in citing the 'particulars' that I didn't answer your question.The 1.780 compression height piston will be "about" .040 'in the hole' and thus reducing compression.So depending on gasket and head chamber size you could wind up with a low compression motor.I wouldn't waste my time,but thats just me.With the other piston,you have more flexability to taylor CR depending on gasket thickness & head combustion chamber size.Not sure what the .170 dome would give,,,11-12:1??? If so then detonation could be a problem.If this is a 'daily driver',a 1.805 comp.height,2 relief flat top would be what I'd recommend.It all depends on vehicle use and available fuel I guess.