Hypothetical 318 Builds

273 said

https://www.motortrend.com/how-to/ccrp-0401-mopar-318-engine/
Magnum heads 10:1 cr comp 280h cam

Mopar 318
RPM	HP	TQ
3,000	190	332
3,500	241	376
4,000	286	376
4,500	321	375
4,900	357	382
5,000	363	381
5,500	388	371
6,000	398	348
6,200	400	339
6,500	393	318

https://www.motortrend.com/how-to/0810phr-chrysler-318-engine/
EQ 9.85:1 cr xe275hl

RPM	TQ	TQ	HP	HP
	BASE	PORTED	BASE	PORTED
3,000	335	335	192	192
3,200	342	340	208	207
3,400	351	356	228	231
3,600	365	369	250	253
3,800	374	379	271	274
4,000	379	384	289	293
4,200	378	383	302	306
4,400	375	383	314	321
4,600	376	382	329	335
4,800	375	386	343	353
5,000	372	384	354	366
5,200	367	383	363	378
5,400	361	379	371	390
5,600	355	374	379	399
5,800	350	371	386	409
6,000	345	365	395	418
6,200	341	360	402	425
6,400	329	345	401	421

https://www.motortrend.com/how-to/318-small-block-build/
Ported 302 10:1 xe268h

RPM	TEST 1		TEST 2		TEST 3
	Torque	HP	Torque	HP	Torque	HP
3,000	334.9	191.3	354.1	202.3	349.1	199.4
3,500	360.7	240.4	378.2	252.0	380.7	253.7
4,000	376.6	286.8	402.3	306.4	401.5	305.8
4,100	379.3	296.1	402.4	314.1	401.6	313.5
4,500	374.0	320.4	402.5	344.9	400.1	342.8
4,600	374.0	327.6	403.1	353.0	400.6	350.9
4,700	373.5	334.2	400.6	358.4	408.0	365.1
5,000	363.9	346.4	389.7	371.0	402.0	382.7
5,500	344.0	360.2	368.3	385.7	386.5	404.8
5,900	331.1	372.0	347.1	390.0	361.4	406.0
6,000	328.3	375.0	344.0	393.0	353.8	404.2
6,100	319.4	371.0	339.2	394.0	347.8	404.0

https://www.motortrend.com/how-to/0901phr-mopar-318-magnum-engine/
ported EQ 10.5:1 solid 247/247 @ fifty

On The Dyno DTS Dyno Data Performance Crankshaft 323CI Small-Block Mopar

RPM	TQ	HP
2,500	337	161
2,600	350	173
2,700	357	183
2,800	357	190
2,900	356	196
3,000	351	201
3,100	345	204
3,200	339	207
3,300	343	216
3,400	356	230
3,500	371	247
3,600	385	264
3,700	396	279
3,800	404	292
3,900	410	305
4,000	415	316
4,100	418	327
4,200	420	336
4,300	422	345
4,400	421	353
4,500	420	360
4,600	421	369
4,700	425	380
4,800	426	390
4,900	427	398
5,000	427	407
5,100	427	414
5,200	426	421
5,300	425	428
5,400	423	435
5,500	421	440
5,600	419	446
5,700	417	453
5,800	415	458
5,900	412	462
6,000	407	465
6,100	401	466
6,200	397	469
6,300	393	471
6,400	390	475
6,500	386	477

https://www.motortrend.com/how-to/mopp-0312-318-long-block-bolt-ons/
stock heads cr xe262h

HORSEPOWER SUPERFLOW 901 DYNO-TESTED AT WESTECH
RPM	BASE	MOD 1	MOD 2
2,000	112
2,500	137
3,000	164	193	192
3,500	182	224	227
4,000	189	248	252
4,500	186	265	274
5,000	179	271	282
5,500		262	270

TORQUE SUPERFLOW 901 DYNO-TESTED AT WESTECH
RPM	BASE	MOD 1	MOD 2
2,000	292
2,500	287
3,000	287	338	336
3,500	272	335	340
4,000	248	326	330
4500	218	309	319
5,000	188	285	296
5,500		250	258

Click to expand...

Interesting observation

If you look at the tq at 3000 rpm which all show, the stock 2bbl with headers makes 287 tq and the rest no matter what cam and cr make from 332-354 tq a good 40-60+ tq over stock cam, and the most built 318 also makes 332 tq @ 2500 rpm over stock 287 tq.

Hp % of tq @ rpm = 57% @ 3000 rpm = 287 tq vs 332 tq vs 354 tq = 164 hp vs 189 hp vs 202, and at 2500 rpm = 48% = 287 tq vs 332 tq = 137 hp vs 159 hp.

Cams that most would consider low rpm tq killers especially in a 318 don't show that to be the case.