SBC Dart block question---?

Greg Reimer 7376 · 01-30-2013, 09:13 PM

Gotta question on a Dart block-the NHRA legal replacement legal in Stock. I had all the machine work done at Tri City in Vista,(a stellular enterprise if there ever was one,thanks Gregg),installed the cam, assembled the short block, and the cam lobes don't line up with the lifter bores with the chain set I used. It's the same chain set for a factory 327 or 350 block of that age. Does the Dart block require a different roller chain set, also I noticed provisions for a front thrust plate for the OEM later steel roller cams. Is there a later chain set with a different offset or something that would make this work? Just thought I'd ask.

randy wilson · 01-30-2013, 09:24 PM

No, shim behind, or in front of the gear, and push it in, or out, whichever is needed. There is no special gear. There are shims from different type drives that will work.

carl hinkson · 02-11-2013, 11:12 AM

Quote:

Originally Posted by Greg Reimer 7376

Gotta question on a Dart block-the NHRA legal replacement legal in Stock. I had all the machine work done at Tri City in Vista,(a stellular enterprise if there ever was one,thanks Gregg),installed the cam, assembled the short block, and the cam lobes don't line up with the lifter bores with the chain set I used. It's the same chain set for a factory 327 or 350 block of that age. Does the Dart block require a different roller chain set, also I noticed provisions for a front thrust plate for the OEM later steel roller cams. Is there a later chain set with a different offset or something that would make this work? Just thought I'd ask.

If its a roller cam it should be centered a flat tappet cam some times is located to the rear of the bore.

Mike Taylor 3601 · 02-12-2013, 12:40 AM

A easy way to check is look @ the chain w/ cam gear against block and see if it is in line w/crank gear,you may have to remove the chain and lay a straight edge across cam/crank gears,if it is out of line you will most likely break the chain pretty quick if is enough out of line it can have lifters hit sides of next cam lobe.
if is outta line have find where problem is and correct it
Mike Taylor 3601

01-30-2013, 09:13 PM	#1
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,136 Likes: 172 Liked 705 Times in 219 Posts	SBC Dart block question---? Gotta question on a Dart block-the NHRA legal replacement legal in Stock. I had all the machine work done at Tri City in Vista,(a stellular enterprise if there ever was one,thanks Gregg),installed the cam, assembled the short block, and the cam lobes don't line up with the lifter bores with the chain set I used. It's the same chain set for a factory 327 or 350 block of that age. Does the Dart block require a different roller chain set, also I noticed provisions for a front thrust plate for the OEM later steel roller cams. Is there a later chain set with a different offset or something that would make this work? Just thought I'd ask.

01-30-2013, 09:24 PM	#2
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	Re: SBC Dart block question---? No, shim behind, or in front of the gear, and push it in, or out, whichever is needed. There is no special gear. There are shims from different type drives that will work. __________________ don,t have one

02-12-2013, 12:40 AM	#4
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,372 Likes: 354 Liked 307 Times in 103 Posts	Re: SBC Dart block question---? A easy way to check is look @ the chain w/ cam gear against block and see if it is in line w/crank gear,you may have to remove the chain and lay a straight edge across cam/crank gears,if it is out of line you will most likely break the chain pretty quick if is enough out of line it can have lifters hit sides of next cam lobe. if is outta line have find where problem is and correct it Mike Taylor 3601