327/275/250hp Super Stock Engine

[Ed Carpenter]

327/275hp with Q-Jet

327/250hp with 4GC

[283SS]

yes I now thats but those two motors have defrent heads on them the 250 hp has 1.72 intake and the 275 hp has a 1.94 hmmm

[Ed Carpenter]

I run a 66 Chevy II with this engine I can run SS/G,H,I with the 275hp combo or I can run in GT by putting a 4GC carb on it. At my weight I can run GT/G or add weight to run GT/H. I have run both combos. There is no changing heads just the carb. I claim the 65 Nova 327/250 for GT. Ed

[283SS]

ok ty

[Ed Carpenter]

From NHRA engine blueprint page

NHRA Technical Specifications
For
1965 Chevrolet Motors



ROD
BORE STROKE DISPLACEMENT CYLINDERS LENGTH
3.875 3.250 153 4 5.700
3.438 2.940 164 6 4.720
3.563 3.250 194 6 5.700
3.875 3.250 230 6 5.700
3.875 3.000 283 8 5.700
4.001 3.250 327 8 5.700
4.094 3.766 396 8 6.136
4.313 3.500 409 8 6.010 4/29/2008


Issued: 19 March 1965
Revised: 7-21-78, 1-9-93, 10-15-02, 5-22-03, 10-11-04, 11-10-05 WR, 4-26-06 WR, 5-2-07 WR


H.P. Disp. C.R. Ind. Make Model/Transmission Manifold R.R. Lifter Head cc Notes
90 153 8.50 1-1 Cart YF-3379S/SM, 3402S/AUTO 1.75 H 69.6 1
95 164 8.25 2-1 Roch 7025023/ALL 1.57 H 55.3 2
110 164 9.25 2-1 Roch 7025023/SM, 7025024/PG 1.50 H 48.0 3
120 194 8.50 1-1 Roch 7023105/SM, 7023108/PG 1.75 H 59.4 4
140 164 9.25 4-1 Roch 7025023 FR, 7025226 Rr/ALL 1.50 H 50.2 2
140 230 8.50 1-1 Roch 7025003/SM, 7025000/PG 1.75 H 69.6 4
180 164 8.25 1-1 Cart YH-3692S/SM ONLY 1.50 H 59.8 5
195 283 9.25 1-2 Roch 7024101/SM, 7024110/PG 1.50 H 54.9 6
220 283 9.25 1-4 Roch 7025127/SM, 7025126/PG 3844457 1.50 H 54.9 7,16
250 327 10.50 1-4 Roch 7025127/SM, 7025126/PG 3844457 1.50 H 57.5 8,16
300 327 10.50 1-4 Cart AFB-3721S/SM, 3720S/PG 3844459 1.50 H 57.5 9
325 396 10.00 1-4 Holl R-3139A/SM, R-3140A/PG 3866948 1.70 H 96.4 10,17
340 409 10.00 1-4 Roch 7025123/SM, 7025124/PG 1.75 H 9.2 11
350 327 11.00 1-4 Holl R-3043A/SM ONLY 1.50 H 58.6 12,19
365 327 11.00 1-4 Holl R-2818A/SM ONLY 1.50 M 58.6 13,19
375 327 11.00 FI Roch 7017308/SM ONLY 1.50 M 58.6
375 396 11.00 1-4 Holl R-3310/SM ONLY 3866963 1.70 H 106.9 14,18, 20
Note: The above line spec of 106.9 cc is for the factory iron head, not the 401 al head
375 396 11.00 1-4 Holl R-3310/SM ONLY 3866963 1.70 H 103.3 14,18, 20
Note: The above line spec of 103.3 cc is for the 401 alum replacement head
400 409 11.00 1-4 Cart AFB-3738S/SM ONLY 1.75 M 10.3 15
425 396 11.00 1-4 Holl R-3124A, R-3130A/ALL 069,163,19131359 1.70 M 106.9 14
Note: The above line spec of 106.9 cc is for the factory iron head, not the 401 al head
425 396 11.00 1-4 Holl R-3124A, R-3130A/ALL 069,163,19131359 1.70 M 103.3 14
Note: The above line spec of 103.3 cc is for the 401 alum replacement head

1 - Carb sizes - 1686/1313 2 – Carb sizes – 1250/1000
3 - Alt carbs - 7025025/ALL Carb sizes - 1250/1000
4 - Carb sizes - 1562/1343 5 – Carb sizes – 1500/1313
6 - Carb sizes - 1437/1093 7 – Carb sizes – 1437x1437/1125x1250
8 - Carbs listed are for Chevelle. Chev II uses 7024255/ALL Corvette uses Carter WCFB-3697S/ALL
Chevrolet uses Carter WCFB-3697S/SM, WCFB-3696S/PG or Roch 7025121/PG
Carb sizes - Roch 1437x1437/1125x1250 Cart 1437x1437/1062x1250
9 - Carb sizes - 1562x1686/1250x1562
10 - Alt carbs - Roch 7025201/SM 7025200/PG or Holl R-3139A/ALL
Carb sizes - Roch 1375x2250/1093xAV Holl 1562x1562/1250x1313
11 - Carb sizes - 1562x1686/1313/1468
12 - Alt carbs - Corvette uses R-2818A/SM ONLY Carb sizes - 1562x1562/1250x1313
13 - Carb sizes - 1562x1562/1250x1313 14 – Carb size – 1686x1686/1375x1437
15 - Carb size-1625x1686/1343x1562 16 – Alt manifold – 922, 858, 459
17 - Manifold listed is for Holley. Roch manifold # 3883948 18 – Alternate manifold – 069,163,19131359
19 – Alternate manifold - 3844461
20 - Carb listed are for Chevelle. All others use R-3130A/SM only





Deck Piston Type
H.P. Disp. Cl Dish/Dome Ht/Vol Valves Cam Lift Springs Gask Head Castings
90 153 .011 Flat w/n 1725/1505 397/397 Outer w/Damp .032
95 164 .0005 Flat 1345/1245 403/403 Outer w/Damp .034
110 164 .0005 Flat 1345/1245 391/391 Outer w/Damp .034 3883863,3878566
120 194 .011 Flat w/n 1725/1505 332/332 Outer Only .032 3864883,329609
140 164 .0005 Flat 1725/1365 391/391 Outer w/Damp .034 3856728
140 230 .011 Flat w/n 1725/1505 332/332 Outer Only .032 3864886,331184,
331183, 3998180
180 164 .0005 Flat 1345/1245 374/374 Outer w/Damp .034
195 283 .014 Flat w/n 1725/1505 399/399 Outer w/Damp .018 896, 520
220 283 .014 Flat w/n 1725/1505 399/399 Outer w/Damp .018 896, 520
250 327 .014 Flat w/n 1945 1505 399/399 Outer w/Damp .018 461,462,041,492,186,291
300 327 .014 Flat w/n 1945/1505 399/399 Outer w/Damp .018 461,462,041,492,186,291
325 396 .005ab Dome .201" 22.04cc 2070/1725 398/398 Outer w/Damp .028 063,206,215,280,290,
390,702,802
340 409 .011 Flat w/slant Note 1 2070/1725 400/412 Outer/Inner .028 3830817
350 327 .002 Dome .120" 5.3cc 2023/1605 447/447 Outer w/Damp .018 Note 2
365 327 .002 Dome .120" 5.3cc 2023/1605 485/485 Outer w/Damp .018 Note 2
375 327 .002 Dome .120" 5.3cc 2023/1605 485/485 Outer w/Damp .018 Note 2
375 396 .005ab Dome .357" 39.50cc 2195/1725 461/500 Outer w/Damp .028 208,858,391,840,291
or Outer/Inner
Note: The above line spec is for the iron heads, not the 401 alum replacement head
375 396 .005ab Dome .357" 39.50cc 2195/1845 461/500 Outer w/Damp .028 401 Alum Head
or Outer/Inner
Note: The above line spec is for the 401 alum replacement head
400 409 .011 Flat w/slant Note 1 2195/1725 557/557 Outer w/Damp .028 3852583
425 396 .005ab Dome .357" 39.50cc 2195/1725 497/503 Outer w/Damp .028 208,858,391,840,291
or Outer/Inner
Note: The above line spec is for the iron heads, not the 401 alum replacement head
425 396 .005ab Dome .357" 39.50cc 2195/1845 497/503 Outer w/Damp .028 410 Al Head
or Outer/Inner
Note: The above line spec is for the 401 alum replacement head


Note 1 - Block volume = 64.6cc Note 2–Head s= 820,461,462,186,414,041,492,291

[Tom Moock]

283SS, 1964 327-250hp. small intake valve 283 head. 1965 327-250hp large intake valve 327 head. Tom

[Jim Hanig]

The big valve motor rated at 270 the small valve rated at 258. Jim Hanig