Where are all the big cams in big cubes?
02-15-2010, 09:04 PM
#1
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Where are all the big cams in big cubes? Hey guys, I was curious about something. A lot of guys put a really big and unruly cam in stock displacement and make some pretty big hp numbers (high 400s).
My logic would say put an unruly cam in something with some cubes (402+) and make some really big hp numbers (high 500s maybe?), but most bigger cube motors I read about stay with smaller cams to make great torque and have street manners and only make high 400s hp.
Why is that? Why do people live with issues in small cubes but don't seem to in big?
My logic would say put an unruly cam in something with some cubes (402+) and make some really big hp numbers (high 500s maybe?), but most bigger cube motors I read about stay with smaller cams to make great torque and have street manners and only make high 400s hp.
Why is that? Why do people live with issues in small cubes but don't seem to in big?
02-15-2010, 09:13 PM
#2
Most of the guys with big strokers running really big cams don't post much here in the dyno section. They mostly race for money (on the street or track) and therefore don't broadcast their specs nor dyno results. Trust me, there are lots out there.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
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2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
02-16-2010, 04:21 AM
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I wonder if it also has to do with the rev potential of a bigger cubes vs the 346.
Other than the type of racers that Patrick mentioned, using a bigger cam in a bigger cube engine and getting it to rev higher might be an issue.
Easier to get a 346 to rev higher by cam only.
I am asking along with you. Is that also part of the reason?
Other than the type of racers that Patrick mentioned, using a bigger cam in a bigger cube engine and getting it to rev higher might be an issue.
Easier to get a 346 to rev higher by cam only.
I am asking along with you. Is that also part of the reason?
02-16-2010, 06:36 PM
#5
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I wish i had gone far bigger in mine 
....ah well later down the road more head porting and a hella bigger cam is definitely in the picture...I just want it to run right now 
....ah well later down the road more head porting and a hella bigger cam is definitely in the picture...I just want it to run right now 
02-16-2010, 09:45 PM
#7
I'd love to throw a 4" crank in mine with some trickflows or so and a bigger cam.
As for now, it runs great for what I'm wanting to do which is bracket and index racing.
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02-16-2010, 10:29 PM
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I'm looking to put a bigger cam in my 402ci motor. I'm running a small MS3 (237/242). I'm looking into a mid to high 240 on the intake and a high 240 to low 250 on the exhaust. I just hope my smaller heads can support it (stage 1 243's). I will be getting my FAST 92 ported as well as install the newer style TSP ORY over my catted version and some bigger headers (1 7/8). I'm hoping to pick up a few ponies...
02-16-2010, 11:14 PM
#10
I wonder if it also has to do with the rev potential of a bigger cubes vs the 346.
Other than the type of racers that Patrick mentioned, using a bigger cam in a bigger cube engine and getting it to rev higher might be an issue.
Easier to get a 346 to rev higher by cam only.
I am asking along with you. Is that also part of the reason?
Other than the type of racers that Patrick mentioned, using a bigger cam in a bigger cube engine and getting it to rev higher might be an issue.
Easier to get a 346 to rev higher by cam only.
I am asking along with you. Is that also part of the reason?
02-17-2010, 09:45 AM
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388ci here (1st gen)...just installed a 276/276 .688/.689 in it...waiting to get the heads back so I can order new pushrods and fire it up! Guy redoing the valves/retainers etc commented that the cam was a bit too big...
Go big or go home
.
Go big or go home
.
02-18-2010, 10:12 AM
#14
I wonder if it also has to do with the rev potential of a bigger cubes vs the 346.
Other than the type of racers that Patrick mentioned, using a bigger cam in a bigger cube engine and getting it to rev higher might be an issue.
Easier to get a 346 to rev higher by cam only.
I am asking along with you. Is that also part of the reason?
Other than the type of racers that Patrick mentioned, using a bigger cam in a bigger cube engine and getting it to rev higher might be an issue.
Easier to get a 346 to rev higher by cam only.
I am asking along with you. Is that also part of the reason?
02-18-2010, 10:35 AM
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Thanks for the clarification.
More CI and can still rev up to 8500 RPM..That sounds like a lot of fun.
Now I know what I'll be saving up my money for when the time comes!
Thanks..
More CI and can still rev up to 8500 RPM..That sounds like a lot of fun.
Now I know what I'll be saving up my money for when the time comes!
Thanks..
02-18-2010, 05:14 PM
#16
Alot of people run big cams but as said up top that they just dont advertize it much for whatever reason. i run a straight pattern since i am boosted, 254/254 114lsa and i would call that only on the high side of mild. There are some massive cams out there.
02-18-2010, 09:43 PM
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My car has no drivability issues, but I've seen a couple of very similar builds make the same numbers with 10* less duration on both sides.
02-24-2010, 07:17 AM
#18
Those of us that drove our strokers every day are limited by intake vacuum as well. I think I was only seeing about 7"-8" hg with mine. I was running a 247/255 .623/.623 on a 112+2. That gets kind of hard to tune for a daily driver. And like the rest of the guys were saying, you run out of induction pretty fast on a large motor.
02-24-2010, 08:19 AM
#19
Those of us that drove our strokers every day are limited by intake vacuum as well. I think I was only seeing about 7"-8" hg with mine. I was running a 247/255 .623/.623 on a 112+2. That gets kind of hard to tune for a daily driver. And like the rest of the guys were saying, you run out of induction pretty fast on a large motor.