Technical 327 connecting rods

Mainly just a thought exercise I'm building a 327 sbc for my 41 Willy's . Since the 327 uses 5.7 connecting rod just like the 350 would using a 6 inch rod have the same benefits on a 327 as it would on a 350 higher compression and removal of piston slap

 

Yep, get the right pistons for a 3.25” stroke and 6”rod. I believe SCAT lists them. The pin needs to be .300” higher in the piston.

 

Unless you have a LG 327 the 6" rods are pricey. I believe that the rod length does not change the CR you have to use pistons made for a 6" rod and can get any CR you want.

Pat

 

Well Mario what do you think?

Pat

 

There's a lot of technical discussions on longer rods an their effect on performance. On a street engine, the slight advantages are not worth the cost of new rods and pistons...

 

Look at Richard Holdener ytube videos,he just ran this test recently.

 

I'm building a 331 for Willy's I have a choice between a small journal and large probably go with the small I find the 6 inch rod interesting because I think it should help with stability on the top end

 

Why?

 

Going with the small journal because you can rev to 8 grand no problem the Willy's might see some light drag racing.ive built quite a bit of 355 over my life time and there is difference between the 5.7 and 6 inch rod it does seem to help keep the harmonics down on the top end

 

Check with CNC motorsports. They stock a lot of SJ stuff.
If you are going to drive this on the street, just use a late model roller block and LJ 327 crank. Then you can avoid all of the cam lobe failure issues. I am going to build one soon using a Dart SHP block.

I've never used Eagle rods, but here's a sample.
https://www.cnc-motorsports.com/catalogsearch/result/?cat=0 &q=small+journal+327+connecting+rods

 

Cool thanks

 

Engine Masters TV show (Motortrend) recently ran dyno tests comparing std and long rods. You can probably find it on You Tube. I can't even remember the results but there were minimal differences through the RPM curve.

 

The advantage of the long rods is minimal, however it opens up off the shelf pistons. A lot of the stroker combinations, like the 383, use a piston that works perfect with a 3.25" stroke.

If my old man memory serves, the compression height is 1.260"

 

Thank you did not no that that information will come in handyUOTE="Roothawg, post: 14116500, member: 160"]The advantage of the long rods is minimal, however it opens up off the shelf pistons. A lot of the stroker combinations, like the 383, use a piston that works perfect with a 3.25" stroke.

If my old man memory serves, the compression height is 1.260"[/QUOTE]