Piston guided engine Gen3 hemi

ss3011 · 10-28-2018, 10:59 PM

I think a piston guided rod has a lot of side clearance on the big end and relies on the piston to center up the rod on the crank . I don't think it has anything to do with crankshaft endplay . I don't really understand what the reason is for wanting all that side clearance at the big end , unless it helps more oil flow through the bearing . Possibly allows the designer to make a lighter piston .

Adger Smith · 10-29-2018, 05:06 AM

less rotating mass Big end of the rod is just a flywheel.

340Cuda · 10-29-2018, 11:10 AM

Quote:

Originally Posted by ss3011

I think a piston guided rod has a lot of side clearance on the big end and relies on the piston to center up the rod on the crank . I don't think it has anything to do with crankshaft endplay . I don't really understand what the reason is for wanting all that side clearance at the big end , unless it helps more oil flow through the bearing . Possibly allows the designer to make a lighter piston .

My understanding is that the piston guided rods had less friction. It was also told it was popular for NASCAR qualifying engines back when they could use them. I have had one motor with this setup and I agree it has nothing to do with crankshaft endplay.

Larry Hill · 10-29-2018, 02:13 PM

Would it make the piston rooster, read ( **** ) in the bore parallel to the mains?

Stewart Way · 10-29-2018, 09:09 PM

Haven't heard from the guy on Moparts to see how he thinks this will help. If I do I will let you guys know. Thanks for the responses.

10-28-2018, 10:59 PM	#1
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 911 Likes: 70 Liked 239 Times in 114 Posts	Re: Piston guided engine Gen3 hemi I think a piston guided rod has a lot of side clearance on the big end and relies on the piston to center up the rod on the crank . I don't think it has anything to do with crankshaft endplay . I don't really understand what the reason is for wanting all that side clearance at the big end , unless it helps more oil flow through the bearing . Possibly allows the designer to make a lighter piston .

10-29-2018, 05:06 AM	#2
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Piston guided engine Gen3 hemi less rotating mass Big end of the rod is just a flywheel. __________________ Adger Smith (Former SS)

10-29-2018, 02:13 PM	#4
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,685 Likes: 1,994 Liked 11,032 Times in 2,267 Posts	Re: Piston guided engine Gen3 hemi Would it make the piston rooster, read ( ** ) in the bore parallel to the mains? __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817** Last edited by Larry Hill; 10-29-2018 at 02:17 PM.

10-29-2018, 09:09 PM	#5
Stewart Way Member Join Date: Aug 2003 Location: Atlanta Posts: 476 Likes: 20 Liked 70 Times in 22 Posts	Re: Piston guided engine Gen3 hemi Haven't heard from the guy on Moparts to see how he thinks this will help. If I do I will let you guys know. Thanks for the responses. __________________ Stewart Way 2424 SS