Stroker question
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
Stroker question
I just finished assembly of my short block today. I had to grind a tiny bit off the #2 and #6 rod where they were hitting the cam lobe. I didn't have to remove enough to have any drastic effects on balancing. I have plenty of clearance now but I've been wondering if I would have been better off with a cam with different lobe angles. Mine is a 110* separation, would a 114* have been better?
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
Hi Pete, I had thought of that but I got over .050 clearance just by taking the very edge of the rod right by the bolt off so I'm okay but was just wondering what could have eliminated any grinding. I hate to change cams, my tune is working perfectly with the Comp Cam I have, thanks to ski_dwn_it.
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
It sounds like you were pretty lucky. I had to grind the nutz off most of my rod bolts to get mine to work. Having to a small amount of grinding on 2 bolts is minor. The amount of grinding I have to do for Beppe's 396 is insane. Every time I think I have it licked, something else hits
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
I used what I hear is a new item from ARP, they are rod bolts specifically for the 383 and are already clearanced. I had absolutely no issues with the bolts but I had to take the edge off the rod down even with the head of the rod bolt to get my clearance. I checked all 8 with white grease and all have plenty of clearance now.
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
As I mentioned in the pm, .050-.060 is the rule of thumb, but I have run them as tight as .030 and did not have trouble. My first stroker build used a non stroker, crower rod. I worked each rod on the belt sander for a long time. I will use stroker rods next time.
Disclaimer: I have only run .030 because I had to. I never felt comfortable that they were that close.
Disclaimer: I have only run .030 because I had to. I never felt comfortable that they were that close.
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
I can see why that would make you nervous, that's why I made sure I went for at least .050 when I ground off the rods. Why do we do this to ourselves??
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Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by Midnight 85
I'm okay but was just wondering what could have eliminated any grinding.
RACE ON!!!
Drifting
Joined: Apr 2003
Posts: 1,379
Likes: 4
From: rome ny
Originally Posted by Pete K
It sounds like you were pretty lucky. I had to grind the nutz off most of my rod bolts to get mine to work. Having to a small amount of grinding on 2 bolts is minor. The amount of grinding I have to do for Beppe's 396 is insane. Every time I think I have it licked, something else hits
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
Originally Posted by CFI-EFI
Proper connecting rods. No 383 should have to use a reduced base circle camshaft for rod clearance. Chevy made a 3.75" stroke crank fit within those same confines.
RACE ON!!!
RACE ON!!!
The aftermarket H-beam rods clear with no problem. They have bolts that go in from the bottom, as opposed to bolts that go in from the top with nuts on the bottom.