88stang302

I have a 351w block and im going to build it.should i do a 357,393 or 408 im only lookin for maybe 450-500 hp street car on motor,I kno im going to use edelbrock victor jr heads and victor jr intake,with the right cam how much should I expect.

psuhillbilly150

6 to 8 thousand depending on if ya get cast crank vs forged, inexpensive vs expensive carb, I beamvs H beam rods, most cams vs solid roller cam, and a bunch of little knick knacks that you can put on for added strenght. If ya want 500 at the wheels I would go 408 with 11.1 compression or maybe a shade under depending on what kind of gas you can get in your area. I run 93pumpgasbut i know some people can only get the 91 pump gas

bighungrymatt

Go with the 408

79mustang93

It doesnt really matter here 393 or 408 is a great combo's
you should easily make 425-500 with no much of a problem, itmainly depends on your compression ratio like hillbilly said

worm2500

also 393 will probably be better for street driven applications. on 408's thewrist pinsets up higher on the piston sothe oil ringacctuallypassesacross thewrist pin hole. this causes the engine to use alot more oil than the 393.

79mustang93

I agree with worm , i read were these 393 combo could see up to 50,000 if treated right mainly becasue of the rod ratio

thunderjet429

not true on the oil ring in the 408... my mahle pistons do NOThave the oil ring even close to the wrist pin. my 408 has a 6.250 inch rod hows that for rod ratio, the longer the piston is at the top of the cylinder the better for power.

redeye

i got a new set of 408w pistons the oil ring is not the the wrist pin area, i got the wrong compression height , after i had them fly cut, there $500 piston there srp's flat tops. i'll take 225 for them shipped. PM ME !

plus i got $180 in the fly cutting.

i'll prob never use them .