Cam up-grade

Reply Subscribe

Thread Tools

Search this Thread

Jan 23, 2008 | 11:17 AM

sedly

Thread Starter

Posting Guru

Joined: Dec 2007

Posts: 2,324

Likes: 0

From: Revelstoke B.C.

Cam up-grade

I am purchasing a used 300 I6 tomorrow.I already have one in my '76 HiBoy now but it need's to be re-built.My question is-If I were to put a stronger cam (Comp 268 for example)in the motor,would the piston's need to be changed as well?

Jan 23, 2008 | 07:29 PM

6CylBill

Post Fiend

Joined: Jan 2007

Posts: 7,021

Likes: 5

From: Almost Heaven

I'm curious about this too. I plan on putting a better cam in mine when I rebuild it (hopefully not any time soon) and I don't know the first thing about cam's.

Jan 23, 2008 | 07:33 PM

Duke78

Senior User

Joined: Sep 2007

Posts: 436

Likes: 0

where'd you get a new 300?

Jan 23, 2008 | 09:55 PM

sedly

Thread Starter

Posting Guru

Joined: Dec 2007

Posts: 2,324

Likes: 0

From: Revelstoke B.C.

Quote:

Originally Posted by Duke78

where'd you get a new 300?

Not you again

!Well it's not new,it will be new to me.

Jan 24, 2008 | 07:48 AM

sedly

Thread Starter

Posting Guru

Joined: Dec 2007

Posts: 2,324

Likes: 0

From: Revelstoke B.C.

Quote:

Originally Posted by sedly

I talked to a guy at work last night,he figures there's no need to change pistons unless the cam requires different compression.?I don't know.

Jan 24, 2008 | 10:32 AM

Silver Streak

Postmaster

Joined: May 2002

Posts: 3,241

Likes: 3

From: Broken Arrow, OK

The 268 should be fine, but anything larger would have me wondering with the carb head and pistons. On the EFI engines you'd have to get a pretty lumpy cam to even come close.