needing pistons
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A 383/351M combo with an 8000rpm redline?
There are a couple minor details I still need to check out but it looks good so far. I did some number crunching and this seemed to be the best compromise.
Scat makes a 351W forged steel crank with 3.0" mains, 2.1" rod journals & a 3.75" stroke. $550
A set of (8) Inline 6, 240 rods are about $100 from DSC Motorsports. Early rods used a .912" piston pin, while the later ones were .975". The best part about that is you can use either a stock 351C or a stock 400 piston.
Are the 240 rods strong enough? I think so. They are made from 6415 steel and have been used in 460 stroker motors over 700HP, 7500rpm.
http://members.***.net/dusty_mcguire/540%20Buildup.html
http://www.bacomatic.org/~dw/520/520.htm
1.875" stroke (3.75/2)
6.795" rod (240 I6)
1.63" piston CH
0.0 deck clearance
------------------------
=10.3"
With a 80cc open chamber and FT piston 4cc valve relief, compression works out to 9.5:1
or a 63cc quench chamber and 13cc dish piston is 10.25:1
3.75" stroke X bore
4.030=383
4.040=385
4.060=388
The down side is you lose 25 cu to the 400. On the up side, the reciprocating assembly is at least 10 lbs lighter than either the 351M or 400 and you can get quench benefits easily. Factor in your new RPM potential and I think this would be a hard engine to beat.
Scat makes a 351W forged steel crank with 3.0" mains, 2.1" rod journals & a 3.75" stroke. $550
A set of (8) Inline 6, 240 rods are about $100 from DSC Motorsports. Early rods used a .912" piston pin, while the later ones were .975". The best part about that is you can use either a stock 351C or a stock 400 piston.
Are the 240 rods strong enough? I think so. They are made from 6415 steel and have been used in 460 stroker motors over 700HP, 7500rpm.
http://members.***.net/dusty_mcguire/540%20Buildup.html
http://www.bacomatic.org/~dw/520/520.htm
1.875" stroke (3.75/2)
6.795" rod (240 I6)
1.63" piston CH
0.0 deck clearance
------------------------
=10.3"
With a 80cc open chamber and FT piston 4cc valve relief, compression works out to 9.5:1
or a 63cc quench chamber and 13cc dish piston is 10.25:1
3.75" stroke X bore
4.030=383
4.040=385
4.060=388
The down side is you lose 25 cu to the 400. On the up side, the reciprocating assembly is at least 10 lbs lighter than either the 351M or 400 and you can get quench benefits easily. Factor in your new RPM potential and I think this would be a hard engine to beat.
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