C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Connecting rods: Press fit or bushed 'floating' rods for street use?

Thread Tools
 
Search this Thread
 
Old 03-23-2014, 10:18 AM
  #1  
TedH
Le Mans Master
Support Corvetteforum!
Thread Starter
 
TedH's Avatar
 
Member Since: Feb 1999
Location: Tampa Bay FL
Posts: 8,344
Received 66 Likes on 53 Posts

Default Connecting rods: Press fit or bushed 'floating' rods for street use?

Looking at rotating assemblies. My stocker has what I believe to be powdered metal connecting rods; press fit onto the piston pins (machine shop performed in 1999). Are the bushed rods employing inserts between the pin and rod journal? Is this just something to weaken the small end of the rod?

The SCAT kit I am evaluating has 'SCAT 5.7" 4340 forged i-beam connecting rods... bushed rods for a "floating assembly"...

I tend to favor what I know... press fit. What is appropriate on the street? Time to step up to better (bushed) rods/pins?

The Speed Pro pistons in the kit work with press fit or bushed rods.

Last edited by TedH; 03-23-2014 at 10:31 AM.
Old 03-23-2014, 10:26 AM
  #2  
Street Rat
Le Mans Master
Support Corvetteforum!
 
Street Rat's Avatar
 
Member Since: Aug 2010
Location: Central Texas
Posts: 5,311
Received 529 Likes on 396 Posts

Default

I have used both floating and pressed fit pins on my street engines. On a mild build I would lean towards the pressed pins. If the motor is fairly radical and will incur extended high rpm I wouldn't hesitate to use the floating pins. Either will work. Just my .02. Flame on brothers.
Old 03-23-2014, 10:27 AM
  #3  
BKbroiler
Le Mans Master
 
BKbroiler's Avatar
 
Member Since: May 2002
Location: Lebanon Township New Jersey
Posts: 5,005
Received 706 Likes on 401 Posts

Default

Pressed fit is perfectly adequate for what you're doing with your car. Full floating piston/rod assemblies is for high rpm, high HP racing use.
Old 03-23-2014, 10:38 AM
  #4  
TedH
Le Mans Master
Support Corvetteforum!
Thread Starter
 
TedH's Avatar
 
Member Since: Feb 1999
Location: Tampa Bay FL
Posts: 8,344
Received 66 Likes on 53 Posts

Default

Thanks. I'll inquire to see if the kit can be set up with press fit. I don't expect this engine to make over 350hp and won't see high rpms.

I will also check with local machine shop to see if they have recommendations. Perhaps I can reuse my rods with new ARP bolts.
Old 03-23-2014, 10:51 AM
  #5  
Street Rat
Le Mans Master
Support Corvetteforum!
 
Street Rat's Avatar
 
Member Since: Aug 2010
Location: Central Texas
Posts: 5,311
Received 529 Likes on 396 Posts

Default

Originally Posted by TedH
Perhaps I can reuse my rods with new ARP bolts.
I would spring for new rods in press fit form. They are relatively cheap insurance and only about $250 or so.

They come with ARP bolts too.
Old 03-23-2014, 10:52 AM
  #6  
TedH
Le Mans Master
Support Corvetteforum!
Thread Starter
 
TedH's Avatar
 
Member Since: Feb 1999
Location: Tampa Bay FL
Posts: 8,344
Received 66 Likes on 53 Posts

Default

ok. Will do.

Get notified of new replies

To Connecting rods: Press fit or bushed 'floating' rods for street use?




Quick Reply: Connecting rods: Press fit or bushed 'floating' rods for street use?



All times are GMT -4. The time now is 12:04 AM.