Would anyone with experience of running aluminium rod motors be willing to share the big end clearances that should be run.

I have GRP aluminium rods which came with a recommendation sheet but these seem more relevant to a V8.

My setup is a 1000 plus hp K series fuel is E85 and oil is 10/60 fully synthetic


Many Thanks

 

With using Brad Penn 20w50 oil I target .0033 to .0036 on the big end. I use GRP Pro series AL rods

 

DAMN! I targeted .0025 on my GRP's this past year with the same oil. Maybe its time to pull the HX bearings from the shelf. I havn't pulled them though to read them.

 

Once the GRP's get up to temp the clearances tighten up. Remember, aluminum expands equally in all directions.

 

Yea I understand that part.....

 

I put the rods in the oven and got them up to operating oil temp and then mic'd the journals. Then I did bearing sizing and came up with what clearances I wanted.

 

^ So boss.

 

bwhahahaha, #forumlife

 

Says the guy with almost 13,000 posts. lol

 

This place used to be cool. Now it's.....ehhhh you get
The point.

 

Thanks for the input guys, much appreciated.

Chris your input would be appreciated too



Guy

 

Lol

 

Level Asian!!!!!!! buahahahahahahah lol xD

 

as long as it doesn't blow up clearance