304 V8 rotating assembly measurements

[Watejs06]

Hi all,

Long time reader, only just made my way back into a Holden V8 powered car, well Ute (1999 VS SS, manual)

Wondering if someone can help with the below questions, as I'm getting many mixed results & differing information.

1. What is the stock 304 connecting rod length ?
2. What is the stock 304 piston compression height ?

Slightly different topic:
Am I right in assuming that a 355ci stroker with 5.7 inch connecting rod is actually a Chev kit (308) ? As there seems to be 2 connecting rod lengths available ?

Thanks all.
Jay

 

[Deuce]

Hi all,

Long time reader, only just made my way back into a Holden V8 powered car, well Ute (1999 VS SS, manual)

Wondering if someone can help with the below questions, as I'm getting many mixed results & differing information.

1. What is the stock 304 connecting rod length ?
2. What is the stock 304 piston compression height ?

Slightly different topic:
Am I right in assuming that a 355ci stroker with 5.7 inch connecting rod is actually a Chev kit (308) ? As there seems to be 2 connecting rod lengths available ?

Thanks all.
Jay

I'll do a measure soon.

But yes, a Holden 355" stroker kit is basically a chev 383" stroker kit with a different crank.
Holden 8.8deck height. Chev 9.0 deck height if I remember correctly.
Both can be 5.7 or 6.0 rods.
There is generally a few hundredths in it for remaining piston height below deck, but nothing that cannot be sorted decking/skimming/or thinker gasket.

 

[Deuce]

(all measurements, approximate and in inches)
Stock rod measures 5.667
Compression height is pin divided by two, plus top of pin to top of piston.
(0.925÷2)+1.265 = 1.7275

 

[keith reed]

I'll do a measure soon.

But yes, a Holden 355" stroker kit is basically a chev 383" stroker kit with a different crank.
Holden 8.8deck height. Chev 9.0 deck height if I remember correctly.
Both can be 5.7 or 6.0 rods.
There is generally a few hundredths in it for remaining piston height below deck, but nothing that cannot be sorted decking/skimming/or thinker gasket.

I used the standard Holden rod with a Come racing crank. They make one for the 5.7 rod as well. For me it was a matter of economics.

 

[Watejs06]

(all measurements, approximate and in inches)
Stock rod measures 5.667
Compression height is pin divided by two, plus top of pin to top of piston.
(0.925÷2)+1.265 = 1.7275

Thanks mate, appreciate the help.

I see that the 355ci Stroker is the go to rebuild, everyone seems to go down that road. But I'm considering a well put together forged 304 build, mostly for something different.

 

[Deuce]

Thanks mate, appreciate the help.

I see that the 355ci Stroker is the go to rebuild, everyone seems to go down that road. But I'm considering a well put together forged 304 build, mostly for something different.

Well make sure to get good compression, cam it well AND REV IT!

 

[Immortality]

304 stock stroke - 3.025"
Rod length - 5.627"
Piston compression height - 1.71"

A Holden 355" stroker kit is 3.48" same as the Chev 350 with 4.020" overbore to give 355 cubes.

Scat (Holden) 355" stroker kits come in 2 options, either Holden or Chev journal. The Chev journal is wider than the Holden so you can't swap rods between the 2. Chev journal cranks have lighter counterweight which means balancing the rotating assembly can be more problematic if you end up using heavy pistons. Now where it gets even more interesting is that you can now get Scat Holden (journal) 5.7" rods.

For more info

Holden Premium Pro Sport 4340 Forged H-Beam Connecting Rods

Shop Holden Premium Pro Sport 4340 Forged H-Beam Connecting Rods from SCAT Crankshafts, the leader in high performance engine components.

www.scatcrankshafts.com

https://www.scatcrankshafts.com/product/chevy-small-block-premium-pro-sport-4340-forged-h-beam-connecting-rods/

 

[Watejs06]

I am still considering boost, the Yella Terra 2.4L whipple system seems to produce some great results.

 

[Watejs06]

304 stock stroke - 3.025"
Rod length - 5.627"
Piston compression height - 1.71"

A Holden 355" stroker kit is 3.48" same as the Chev 350 with 4.020" overbore to give 355 cubes.

Scat (Holden) 355" stroker kits come in 2 options, either Holden or Chev journal. The Chev journal is wider than the Holden so you can't swap rods between the 2. Chev journal cranks have lighter counterweight which means balancing the rotating assembly can be more problematic if you end up using heavy pistons. Now where it gets even more interesting is that you can now get Scat Holden (journal) 5.7" rods.

For more info

http://[URL]https://www.scatcranksh...pro-sport-4340-forged-h-beam-connecting-rods/

[/URL]

http://[URL]https://www.scatcranksh...pro-sport-4340-forged-h-beam-connecting-rods/

[/URL]

Thanks mate, very informative. I appreciate the information. Much clearer.

 

[Mottra]

I used the standard Holden rod with a Come racing crank. They make one for the 5.7 rod as well. For me it was a matter of economics.

What pistons did you use? Was it a good result?