|
Register or Log In To remove these advertisements. |
|
|
|
|||||||
 |
|
|
Thread Tools | Display Modes |
|
|
06-30-2002, 05:20 PM
|
#1 |
|
MOTORHEAD!
Join Date: May 2000
Location: Devon AB, Canada
Posts: 849
|
Torque'n the heads RIGHT NOW!!!! Need help ASAP!!!
I'm currently installing heads on the 350, finally switching the 305 heads to 350 ones. What should all the bolts be torqued to? I am using the old bolts again, do I have to torque them higher because of threads stretching?
What is the procedure for tightening the rockers, are they all at a specific torque? Also, My pistons have stamped on them 345NP .030 So I know its 30 over, does anyone recognize the 345NP? They are a flat top piston but I would like to know the compression ratio. Thanks for the help P.S. I really like the new board!!
__________________
82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph |
|
|
|
06-30-2002, 05:27 PM
|
#2 |
|
Registered User
Join Date: Aug 2001
Location: escondido, ca 92026
Posts: 1,222
|
70 ft. lbs. on the head bolts.... go thru the order, working from the center bolts out, first torquing all to 30 ft lbs, then do a second pass, torquing to 70...
__________________
'72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project |
|
|
|
|
06-30-2002, 05:59 PM
|
#3 |
|
MOTORHEAD!
Join Date: May 2000
Location: Devon AB, Canada
Posts: 849
|
Thanks Bigvinnie.
Anybodt know the torques on the Rockers??? Need help right away!!!!! Thanks again!
__________________
82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph |
|
|
|
|
06-30-2002, 06:00 PM
|
#4 |
|
Registered User
Join Date: Feb 2002
Location: point blank
Posts: 113
|
compression ratio answer
there are alot of ways to find compression ratios. You need to know some things first though. Most heads gives you head chamber volume and pistons do to (the number on your piston is the volume in cubic centimeters) head gasket specs: most head gasket co. list specs thicker head gaskets and bigger bores gives lower compression ratios.
go into these links to find a formula that will calculate your compression ratio with the above info. www.mindspring.com/~steveflyer/compression.htm www.smokemup.com/utilities/calc/compression.raatio.cfm scott
__________________
1968 GMC CST long wide box http://groups.yahoo.com/group/67-72-collectors/ |
|
|
|
|
06-30-2002, 06:23 PM
|
#5 |
|
Registered User
Join Date: Aug 2001
Location: escondido, ca 92026
Posts: 1,222
|
If you're talking about adjusting the rocker arms, torque isn't really part of the equation.... you adjust each one individually for valve lash and you're done...
here's a decent link for adjusting valves... http://www.camaros.net/techref/ftecref17.html
__________________
'72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project Last edited by bigvinnie; 06-30-2002 at 06:44 PM. |
|
|
|
|
| Bookmarks |
| Thread Tools | |
| Display Modes | |
|
|
Hybrid Mode
