383 warning
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
383 warning
I talked to the local engine builder last night. He is building a 383 for a customer and was clearancing the block and blew thru to the water jacket. He never saw this before, and did three cylinders on the same block before this one blew thru.
So, his advice is not to change my numbers matching block to a 383. Just wanted to share this. Joe
So, his advice is not to change my numbers matching block to a 383. Just wanted to share this. Joe
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Re: 383 warning (joe73vette)
OH YEH, I have heard that, one reason I did't do a 383 at the time....
thought about it, but then again prices back 5 years ago were high and even though I thought of it, doing in the block on top of it was just too much to bear....355 was it....
GENE
thought about it, but then again prices back 5 years ago were high and even though I thought of it, doing in the block on top of it was just too much to bear....355 was it....
GENE
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
Re: 383 warning (joe73vette)
It's not all that uncommon. A lot has to do with the experience of the machinist/builder. It's clearly not a job for a novice as you might be in the right area but at the wrong grinding angle. Core shift is also a killer.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Re: 383 warning (joe73vette)
Notching can be a necessary gamble. Disasters can & do happen ... all blocks not created equal. Then there's so many rods & strokes. I did my own notching & clearancing of 388 in numbers-match 71 C3 block and was fortunate.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,443
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: 383 warning (mrvette)
383 is just 3.750 stroke. I've done my own grinding for 3.75's, 3.875, & 4.00 inch stroker cranks. I never hit water yet, but the 4 inch stroker also got the lower part of the block filled with epoxy. Because i knew that it was very thin.
I only clearance .040 outboard and .060 for and aft for crank endplay. also only the #2 cylinder has major ginding on the pan rail to clear big rods and nuts. If you look at the bottom of a SBC the pail rail casting is narrower at the front than the back.
There are many inept :confused: bubbas out there. I've also done some screwups, but it was never the end of the world. It just cost a little more!:)
I only clearance .040 outboard and .060 for and aft for crank endplay. also only the #2 cylinder has major ginding on the pan rail to clear big rods and nuts. If you look at the bottom of a SBC the pail rail casting is narrower at the front than the back.
There are many inept :confused: bubbas out there. I've also done some screwups, but it was never the end of the world. It just cost a little more!:)
