? on 350hp cam
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Pro
Joined: Aug 2005
Posts: 704
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From: Cincinnati OH
? on 350hp cam
When I bought my 76 the guy at the shop started one up with a "350 horse" cam. Can anyone tell me what the specs are on this cam? I'm assuming I can pick one up at Summit. He said that was about asa big as you could go and keep good vacuum for the street. i say that because I'm sure a few people will chime in and let me know if that's true or not.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Crane cams blueprinted 327/350 HP
Part # 967601
.050 int. dur. 222
.050 ex. dur. 222
LSA 114
lift int. .447
lift ex. .447
comp ratio 8.75-10.75
power range 2000-5600
How about a modern cam ??
Crane Z-cam
cam and lifters part # 113522
.050 int. dur. 218
.050 ex. dur. .230
adv. int. dur. 268
adv. ex dur. .280
LSA 112
lift int. .459
lift ex. ..486
power range 1800-5800
With an .050 int. dur. of 218 and a 112 LSA you
will have plenty of vacuum
Part # 967601
.050 int. dur. 222
.050 ex. dur. 222
LSA 114
lift int. .447
lift ex. .447
comp ratio 8.75-10.75
power range 2000-5600
How about a modern cam ??
Crane Z-cam
cam and lifters part # 113522
.050 int. dur. 218
.050 ex. dur. .230
adv. int. dur. 268
adv. ex dur. .280
LSA 112
lift int. .459
lift ex. ..486
power range 1800-5800
With an .050 int. dur. of 218 and a 112 LSA you
will have plenty of vacuum
Last edited by Little Mouse; Aug 24, 2006 at 09:03 PM.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Crane has a low duration cam with a 106 LSA that will lope
very good. I think you would like the Z/cam.
Crane cams energizer
cam and lifters part # 100172
.050 Int. dur. 218
.050 ex. dur. 218
adv. Int dur. 274
adv. ex. dur. 274
LSA 106
lift int. .450
lift ex. .450
power range 1800-5400
This cam will pretend to be a big racing cam at idle but is
just a mild cam
very good. I think you would like the Z/cam.
Crane cams energizer
cam and lifters part # 100172
.050 Int. dur. 218
.050 ex. dur. 218
adv. Int dur. 274
adv. ex. dur. 274
LSA 106
lift int. .450
lift ex. .450
power range 1800-5400
This cam will pretend to be a big racing cam at idle but is
just a mild cam
Last edited by Little Mouse; Aug 24, 2006 at 12:48 AM.
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
I have the crane blueprint that Little Mouse posted on. Its gay.
Get a real cam. That Z cam or maybe a comp XE268. Decent cams for mild motors. I think the XE268 is 224/228, .474/.490 on a 110lsa. I just installed that cam in a .040 350 but have not got it running yet. You need headers on it if you don't have them.
Get a real cam. That Z cam or maybe a comp XE268. Decent cams for mild motors. I think the XE268 is 224/228, .474/.490 on a 110lsa. I just installed that cam in a .040 350 but have not got it running yet. You need headers on it if you don't have them.
Le Mans Master
Joined: Mar 2004
Posts: 7,499
Likes: 1,508
From: Little Rock AR
Originally Posted by TheMongoose
When I bought my 76 the guy at the shop started one up with a "350 horse" cam. Can anyone tell me what the specs are on this cam? I'm assuming I can pick one up at Summit. He said that was about asa big as you could go and keep good vacuum for the street. i say that because I'm sure a few people will chime in and let me know if that's true or not.
If you want more lope from an aftermarket cam you can generaly look for tighter lobe centers. For example most Comp Cams grinds are in the 110 degree LC range so they tend to lope more than these stockers that typicaly run closer to 114 degree lobe centers. Don't get too caught up in the lift and durtation comparisons between stock and aftermarket. They are not easily compared because the published GM numbers were not measured the same way and they are not ground anywhere near the same as typical aftermarket specs.
-Mark.
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Thread Starter
Pro
Joined: Aug 2005
Posts: 704
Likes: 2
From: Cincinnati OH
glad I didn't buy anything right away. Some good thoughts here for sure. I am all about a great sounding cam at idle. I have headers and sidepipes for it but they aren't on yet. I plan on doing an air gap manifold too. no heads yet so it will never be a high rpmmotor. just a great sounding street cruiser.
Le Mans Master
Joined: Apr 2005
Posts: 6,359
Likes: 428
From: Seattle Area WA
Stingr69 is totally correct. Both the 327/350 and the 350/350 are excellent performing cams only if you have the required 10:1 SCR. The 327/350 cam is just advanced 4 degrees more for the short stroke 327. Advanced another 4 degrees upon installation provides for stump pulling torque. Both of them have similar late closing inlet valves which yield a lower DCR with the 10:1 SCR. With a 10:1 motor, your DCR will be around 7.6:1 which is perfect for pump gas.
The baseline l-48 cam retarded 4 degrees makes for a decent running engine and low end torque when combined with 9.75:1 SCR max, however it won't have your drive-in lope.
If you are just after a cam to make noise and not yield gobs of low end torque then your basic cam ground on 110 centers is for you.
Summit offers a couple very decent cam kits like their SUM-1103 and SUM-1104 that will fit your bill.
The baseline l-48 cam retarded 4 degrees makes for a decent running engine and low end torque when combined with 9.75:1 SCR max, however it won't have your drive-in lope.
If you are just after a cam to make noise and not yield gobs of low end torque then your basic cam ground on 110 centers is for you.
Summit offers a couple very decent cam kits like their SUM-1103 and SUM-1104 that will fit your bill.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Originally Posted by platzie
For all those afraid to ask: owners that want to put iron vortec's, performer air gap intakes, which cam works the best in a '72 L48 w/ 4 spd. and stock 3.07? gearing??
Crane Cams phone # 386-258-6174 Fax 386-258-6167
Crower Cams Phone # 619-661-6477 Fax 619-661-6466.
Isky
Comp Cams
Last edited by Little Mouse; Aug 24, 2006 at 08:59 PM.
Le Mans Master
Joined: Apr 2005
Posts: 6,359
Likes: 428
From: Seattle Area WA
I might add that your cam choice will depend upon your resulting Static Compression Ratio (SCR). The stock L-48 might have 8:1 if you are lucky. When I recently tore down my son's '76 L-48, it measured out at 7.9:1 with the stock dished pistons and 76cc heads.
The Vortecs have smaller combustion chambers so just do your math before shopping for a cam. With a 3.08 rear end, you are going to want something that will provide you with some good low end torque.
The Vortecs have smaller combustion chambers so just do your math before shopping for a cam. With a 3.08 rear end, you are going to want something that will provide you with some good low end torque.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Originally Posted by stingr69
There are (2) 350 horse cams. The "151" 327/350 HP and the "962" 350/350 HP. Both are simmilar. They have only a slight lope so they are not going to affect any acessories. Soft bottom end and lots of higher RPM potential. I have run them both. The 327/350 seems to work better when installed 4 degrees advanced so it gives you better low RPM torque. I am currently running the 350/350 and have it installed straight up. Very relaible and easy to live with but need compression to work right. I would not pick either one to replace the "929" L-48 cam unless you up the C/R to something in the area of 10:1 compression.
If you want more lope from an aftermarket cam you can generaly look for tighter lobe centers. For example most Comp Cams grinds are in the 110 degree LC range so they tend to lope more than these stockers that typicaly run closer to 114 degree lobe centers. Don't get too caught up in the lift and durtation comparisons between stock and aftermarket. They are not easily compared because the published GM numbers were not measured the same way and they are not ground anywhere near the same as typical aftermarket specs.
-Mark.
If you want more lope from an aftermarket cam you can generaly look for tighter lobe centers. For example most Comp Cams grinds are in the 110 degree LC range so they tend to lope more than these stockers that typicaly run closer to 114 degree lobe centers. Don't get too caught up in the lift and durtation comparisons between stock and aftermarket. They are not easily compared because the published GM numbers were not measured the same way and they are not ground anywhere near the same as typical aftermarket specs.
-Mark.
DANA CLEVITE manufactured & supplied many of the OE cams to GM; still do AFAIK. I’ve pulled many OE motors apart & find raised DANA “elongated diamond” logo cast between lobes. They’re still in business in a big way and provide OE & replacement cams for virtually anything w/ pistons & at least 4 wheels. Following are DANA CLEVITE crossover #’s & cam specs:
(aka L48)
GM 3896929 = 229-1274
SAE 260/271, 0.050” 194*/203*, vl .390”/.410”, icl 108*, ecl 116*, LSA 112* (intake close 25* ABC)
(aka 327-350)
GM 3863151 = 229-1713
SAE 290*/290*, 0.050” 223*/223*, vl .447”/.447”, icl 110*, ecl 118*, LSA 114* (intake close 42* ABC)
(aka L82)
GM 3896962 = 229-1990
SAE 291*/287*, 0.050” 224*/224*, vl .450”/.460”, icl 114*, ecl 114*, LSA 114* (intake close 47* ABC)
