Pontiac V8 engine
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==Pontiac engines by year== | ==Pontiac engines by year== | ||
| − | <table class="style119" style="width: | + | <table class="style119" style="width: 620px" border="2" cellpadding="2" cellspacing="0"> |
| − | <tr bgcolor="# | + | <tr bgcolor="#DDDFFF"> |
| − | <td class="style128" style="width: 81px" valign="bottom">''' | + | <td class="style128" style="width: 81px" valign="bottom">'''YEAR'''</td> |
| − | <td class="style128" style="width: 48px" valign="bottom">''' | + | <td class="style128" style="width: 48px" valign="bottom">'''CID'''</td> |
| − | <td class="style128" style="width: | + | <td class="style128" style="width: 94px" valign="bottom">'''BORE''' (in.)</td> |
| − | <td class="style128" style="width: | + | <td class="style128" style="width: 125px" valign="bottom">'''STROKE''' (in.)</td> |
| − | <td class="style128" style="width: | + | <td class="style128" style="width: 90px" valign="bottom">'''MAIN''' (in.)</td> |
| − | <td class="style128" style="width: | + | <td class="style128" style="width: 90px" valign="bottom">'''ROD''' (in.)</td> |
<tr> | <tr> | ||
<td style="width: 81px">'''1955'''</td> | <td style="width: 81px">'''1955'''</td> | ||
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<tr> | <tr> | ||
<td style="width: 81px">'''1969'''</td> | <td style="width: 81px">'''1969'''</td> | ||
| − | <td style="width: 48px">303</td> | + | <td style="width: 48px">303'''**'''</td> |
<td style="width: 54px">4.125</td> | <td style="width: 54px">4.125</td> | ||
<td style="width: 60px">2.84</td> | <td style="width: 60px">2.84</td> | ||
| Line 96: | Line 96: | ||
<tr> | <tr> | ||
<td style="width: 81px">'''1970'''</td> | <td style="width: 81px">'''1970'''</td> | ||
| − | <td style="width: 48px">366</td> | + | <td style="width: 48px">366'''**'''</td> |
<td style="width: 54px">4.153</td> | <td style="width: 54px">4.153</td> | ||
<td style="width: 60px">3.375</td> | <td style="width: 60px">3.375</td> | ||
| Line 123: | Line 123: | ||
<td style="width: 53px">2.25</td></tr> | <td style="width: 53px">2.25</td></tr> | ||
</table> | </table> | ||
| − | + | '''NOTES:'''<br> | |
| − | + | '''*'''The 1963 "326" engine had an actual displacement of 336 cid.<br> | |
| + | '''**''' The 303 and 366 were not productions engines. | ||
| + | <br> | ||
==Pontiac engines by displacement== | ==Pontiac engines by displacement== | ||
| − | <table class="style119" style="width: | + | <table class="style119" style="width: 620px" border="2" cellpadding="2" cellspacing="0"> |
| − | <tr bgcolor="# | + | <tr bgcolor="#DDDFFF"> |
| − | <td class="style64" style="width: | + | <td class="style64" style="width: 48px" valign="TOP"><p class="style129">'''CID'''</p></td> |
| − | <td class="style64" style="width: | + | <td class="style64" style="width: 81px" valign="top"><p class="style129">'''YEAR'''</p></td> |
| − | <td class="style64" valign="bottom"><p class="style129">''' | + | <td class="style64" style="width: 94px" valign="bottom"><p class="style129">'''BORE''' (in.)</p></td> |
| − | <td class="style64" style="width: | + | <td class="style64" style="width: 125px" valign="bottom"><p class="style129">'''STROKE''' (in.)</p></td> |
| − | <td class="style64" style="width: | + | <td class="style64" style="width: 90px" valign="bottom"><p class="style129">'''MAIN''' (in.)</p></td> |
| − | <td class="style64" style="width: | + | <td class="style64" style="width: 90px" valign="bottom"><p class="style129"> '''ROD''' (in.)</p></td> |
</tr> | </tr> | ||
<tr><td style="width: 38px">'''265'''</td> | <tr><td style="width: 38px">'''265'''</td> | ||
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<td style="width: 26px">2.25</td></tr> | <td style="width: 26px">2.25</td></tr> | ||
<tr> | <tr> | ||
| − | <td style="width: 38px">'''303'''</td> | + | <td style="width: 38px">'''303**'''</td> |
<td style="width: 62px">1969</td> | <td style="width: 62px">1969</td> | ||
<td>4.125</td> | <td>4.125</td> | ||
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<td style="width: 26px">2.25</td></tr> | <td style="width: 26px">2.25</td></tr> | ||
<tr> | <tr> | ||
| − | <td style="width: 38px">'''366'''</td> | + | <td style="width: 38px">'''366**'''</td> |
<td style="width: 62px">1970</td> | <td style="width: 62px">1970</td> | ||
<td>4.153</td> | <td>4.153</td> | ||
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<td style="width: 26px">2.25</td></tr> | <td style="width: 26px">2.25</td></tr> | ||
</table> | </table> | ||
| − | + | '''NOTES:'''<br> | |
| + | '''*'''The 1963 "326" engine had an actual displacement of 336 cid.<br> | ||
| + | '''**''' The 303 and 366 were not productions engines. | ||
| + | <br> | ||
==Engine ID== | ==Engine ID== | ||
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==Bore and stroke== | ==Bore and stroke== | ||
| − | <table border=" | + | <table border="1" cellpadding="2" cellspacing="0" > |
| − | <tr align=" | + | <tr align="center" bgcolor="#DDDFFF" valign="center"> |
| − | <td | + | <td>'''CID'''</td> |
| − | <td | + | <td >'''BORE''' (in.)</td> |
| − | <td | + | <td >'''STROKE''' (in.)</td> |
| − | <td | + | <td >'''MAIN''' (in.)</td> |
| − | <td | + | <td >'''ROD''' (in.)</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''265'''</td> |
| − | <td | + | <td >3.75</td> |
| − | <td | + | <td >3.00</td> |
| − | <td | + | <td >3.00</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''287'''</td> |
| − | <td | + | <td >3.75</td> |
| − | <td | + | <td >3.25</td> |
| − | <td | + | <td >2.50</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''301'''</td> |
| − | <td | + | <td >4.00</td> |
| − | <td | + | <td >3.00</td> |
| − | <td | + | <td >3.00</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''303**'''</td> |
| − | <td | + | <td >4.125</td> |
| − | <td | + | <td >2.840</td> |
| − | <td | + | <td >3.00</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''316'''</td> |
| − | <td | + | <td >3.9375</td> |
| − | <td | + | <td >3.25</td> |
| − | <td | + | <td >2.50</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''326*'''</td> |
| − | <td | + | <td >3.71875</td> |
| − | <td | + | <td >3.75</td> |
| − | <td | + | <td >3.00</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''347'''</td> |
| − | <td | + | <td >3.9375</td> |
| − | <td | + | <td >3.5625</td> |
| − | <td | + | <td >2.623</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''350'''</td> |
| − | <td | + | <td >3.875</td> |
| − | <td | + | <td >3.75</td> |
| − | <td | + | <td >3.00</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''366**'''</td> |
| − | <td | + | <td >4.153</td> |
| − | <td | + | <td >3.375</td> |
| − | <td | + | <td >3.00</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''370'''</td> |
| − | <td | + | <td >4.0625</td> |
| − | <td | + | <td >3.5625</td> |
| − | <td | + | <td >2.623</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''389'''</td> |
| − | <td | + | <td >4.0625</td> |
| − | <td | + | <td >3.75</td> |
| − | <td | + | <td >3.00</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''400'''</td> |
| − | <td | + | <td >4.12</td> |
| − | <td | + | <td >3.75</td> |
| − | <td | + | <td >3.00</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''421'''</td> |
| − | <td | + | <td >4.09375</td> |
| − | <td | + | <td >4.00</td> |
| − | <td | + | <td >3.25</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''428'''</td> |
| − | <td | + | <td >4.12</td> |
| − | <td | + | <td >4.00</td> |
| − | <td | + | <td >3.25</td> |
| − | <td | + | <td >2.25</td></tr> |
| − | <tr align=" | + | <tr align="center" valign="bottom"> |
| − | <td> | + | <td>'''455'''</td> |
| − | <td | + | <td >4.15</td> |
| − | <td | + | <td >4.21</td> |
| − | <td | + | <td >3.25</td> |
| − | <td | + | <td >2.25</td></tr></table> |
| − | </table> | + | '''NOTES:'''<br> |
| − | + | '''*'''The 1963 "326" engine had an actual displacement of 336 cid.<br> | |
| + | '''**''' The 303 and 366 were not productions engines. | ||
<br> | <br> | ||
==Heads== | ==Heads== | ||
===6X heads=== | ===6X heads=== | ||
| − | Casting 6X heads and similar heads from the "smog era" generally all have hardened exhaust seats, screw-in rocker studs and guide plates, with 2.11" intake x 1.66" exhaust valves. See [http://www.pontiacstreetperformance.com/psp/6XheadID.html ''How to Identify Pontiac's Small Chambered 6X Head''] for more info on ID'ing 6X heads. | + | Casting 6X heads and similar heads from the "smog era" generally all have hardened exhaust seats, screw-in rocker studs and guide plates, with 2.11" intake x 1.66" exhaust valves. See [http://www.pontiacstreetperformance.com/psp/6XheadID.html '''''How to Identify Pontiac's Small Chambered 6X Head'''''] for more info on ID'ing 6X heads. |
When inspecting 6X head and Pontiac heads in general, check the spring installed height to be sure it is equal between the valves. The spring's seat and open pressure is also important but all but impossible to measure unless the springs are checked w/a spring gauge. There are spring gauges that can be used on an assembled head. When buying assembled heads, demand a receipt showing part numbers. That will not guarantee anything but will cut down on the BS. | When inspecting 6X head and Pontiac heads in general, check the spring installed height to be sure it is equal between the valves. The spring's seat and open pressure is also important but all but impossible to measure unless the springs are checked w/a spring gauge. There are spring gauges that can be used on an assembled head. When buying assembled heads, demand a receipt showing part numbers. That will not guarantee anything but will cut down on the BS. | ||
===4X heads=== | ===4X heads=== | ||
| − | <table border="2" cellpadding="2" cellspacing="0"><tr bgcolor="# | + | <table border="2" cellpadding="2" cellspacing="0"><tr bgcolor="#DDDFFF"> |
<td align="center"><strong>Stamped ID</strong></td> | <td align="center"><strong>Stamped ID</strong></td> | ||
<td align="center"><strong>Application</strong></td> | <td align="center"><strong>Application</strong></td> | ||
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====1973-'74 4X, 46, 4C, 16/X==== | ====1973-'74 4X, 46, 4C, 16/X==== | ||
| − | <table border="2" cellpadding="2" cellspacing="0"><tr bgcolor="# | + | <table border="2" cellpadding="2" cellspacing="0"><tr bgcolor="#DDDFFF"> |
<th align="center">Stamped ID</th> | <th align="center">Stamped ID</th> | ||
<th align="center">Head #</th> | <th align="center">Head #</th> | ||
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====1975 (early) 5C, 51, 5I==== | ====1975 (early) 5C, 51, 5I==== | ||
| − | <table border="2" cellpadding="2" cellspacing="0"><tr bgcolor="# | + | <table border="2" cellpadding="2" cellspacing="0"><tr bgcolor="#DDDFFF"> |
<th align="center">Stamped ID</th> | <th align="center">Stamped ID</th> | ||
<th align="center">Head #</th> | <th align="center">Head #</th> | ||
| Line 490: | Line 496: | ||
====1975-'79 6X, 6H==== | ====1975-'79 6X, 6H==== | ||
| − | <table border="2" cellpadding="2" cellspacing="0"><tr bgcolor="# | + | <table border="2" cellpadding="2" cellspacing="0"><tr bgcolor="#DDDFFF"> |
<th align="center">Year</th> | <th align="center">Year</th> | ||
<th align="center">Stamped ID</th> | <th align="center">Stamped ID</th> | ||
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===Original head applications=== | ===Original head applications=== | ||
| − | <table border="1" cellpadding="1" ><tr><td colspan="5" align="center" bgcolor="# | + | <table border="1" cellpadding="1" ><tr><td colspan="5" align="center" bgcolor="#DDDFFF"><font size="4"><strong>CYLINDER HEAD APPLICATIONS</strong> </font></td></tr><tr><td bgcolor="#FFF8DC"><strong>Casting</strong></td><td bgcolor="#FFF8DC"><strong>Secondary ID</strong></td><td bgcolor="#FFF8DC"><strong>Valve diameter (in.)</strong></td><td bgcolor="#FFF8DC"><strong>Chamber volume</strong></td><td bgcolor="#FFF8DC"><strong>Original application</strong></td></tr><tr><td>4X</td><td>1/1H</td><td>2.11/1.66</td><td>112 cc</td><td>1973-'74 455ci 4-bbl</td></tr><tr><td>4X</td><td>3/3H</td><td>2.11/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 4-bbl manual trans.</td></tr><tr><td>4X</td><td>4/4H</td><td>1.96/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 2-bbl</td></tr><tr><td>4X</td><td>7/7H</td><td>2.11/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 4-bbl auto trans.</td></tr><tr><td>4C</td><td>5/5H</td><td>1.96/1.66</td><td>96 cc</td><td>1973-'74 350ci 2-bbl w/A.I.R.</td></tr><tr><td>4C</td><td>8/8H</td><td>1.96/1.66</td><td>98 cc</td><td>1973-'74 400ci 2-bbl w/A.I.R.</td></tr><tr><td>46</td><td>6/6H'''*'''</td><td>1.96/1.66</td><td>96 cc</td><td>1973-'74 350ci</td></tr><tr><td>5C</td><td>4</td><td>2.11/1.66</td><td>92-94 cc</td><td>1975 350ci</td></tr><tr><td>5C</td><td>7</td><td>2.11/1.66</td><td>99-101 cc</td><td>1975 400ci w/A.I.R.</td></tr><tr><td>5C</td><td>8</td><td>2.11/1.66</td><td>99-101 cc</td><td>1975 400ci</td></tr><tr><td>5C</td><td>9</td><td>2.11/1.66</td><td>92-94 cc</td><td>1975 350ci w/A.I.R.</td></tr><tr><td>6X</td><td>4</td><td>2.11/1.66</td><td>92-94 cc</td><td>Mid 1975-'77 350ci; 1977-'79 W72 400ci</td></tr><tr><td>6X</td><td>8</td><td>2.11/1.66</td><td>99-101 cc</td><td>Mid 1975-'78 400ci</td></tr><tr><td>6S</td><td>7</td><td>2.11/1.66</td><td>99-101 cc</td><td>Mid 1975-'76 400ci w/A.I.R.</td></tr><tr><td>6S</td><td>9</td><td>2.11/1.66</td><td>92-94 cc</td><td>Mid 1975-'76 350ci w/A.I.R.</td></tr><tr><td>51</td><td>6</td><td>2.11/1.66</td><td>124.5 cc</td><td>1975 455ci</td></tr><tr><td>6H</td><td>6</td><td>2.11/1.66</td><td>124.5 cc</td><td>Late 1975-'76 455ci</td></tr><tr><td bgcolor="#FFF8DC" colspan="5">'''*'''Some have been reported to have a secondary stamp of "2"</td></tr></table> |
<br> | <br> | ||
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Based on info from teufert.net and Ken's Speed & Machine. | Based on info from teufert.net and Ken's Speed & Machine. | ||
<table border="1"> | <table border="1"> | ||
| − | <tr valign="center" align="middle"><td bgcolor="# | + | <tr valign="center" align="middle"><td bgcolor="#DDDFFF"><font size="4"> <strong>PART:</strong></font></td> |
| − | <td bgcolor="# | + | <td bgcolor="#DDDFFF"><font size="4"><strong>INTERCHANGE YEARS:</strong> </font></td></tr> |
<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Block:</strong></td> | <tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Block:</strong></td> | ||
<td >1955,1956,1957,1959-'60,1961-'64 (full size V8), 1964-'69 (Tempest/Grand Prix V8), 1970-'79<br> '''Note:''' No block mount starter holes on pre-1964 blocks</td></tr> | <td >1955,1956,1957,1959-'60,1961-'64 (full size V8), 1964-'69 (Tempest/Grand Prix V8), 1970-'79<br> '''Note:''' No block mount starter holes on pre-1964 blocks</td></tr> | ||
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