should i run a bigger cam?
05-07-2013, 04:16 PM
#1
should i run a bigger cam? 408
-3cc pistons
235/242 .635/615 112lsa
prc ported ls3 heads
ls3 intake
im noticing a lot of guys running much bigger cams than myself and i only made 475/475 to the wheels thru an m6. would bumping my cam up help me some? if so what would you guys recommend
-3cc pistons
235/242 .635/615 112lsa
prc ported ls3 heads
ls3 intake
im noticing a lot of guys running much bigger cams than myself and i only made 475/475 to the wheels thru an m6. would bumping my cam up help me some? if so what would you guys recommend
05-07-2013, 05:26 PM
#2
I made 530/480 in my 403 L92/LS3 headed build with a 230-240 cam and very close to those numbers with a 234-240 cam. The cam you running now is bigger than I run in the 427 build still with the same heads opened up to Stage 3 CNC work. I vote "No" on a bigger cam.
Is this through an auto? What kind of dyno?
I'd be working on what's in front of the TB and what's behind the LT's.
Is this through an auto? What kind of dyno?
I'd be working on what's in front of the TB and what's behind the LT's.
05-07-2013, 05:47 PM
#3
I made 530/480 in my 403 L92/LS3 headed build with a 230-240 cam and very close to those numbers with a 234-240 cam. The cam you running now is bigger than I run in the 427 build still with the same heads opened up to Stage 3 CNC work. I vote "No" on a bigger cam.
Is this through an auto? What kind of dyno?
I'd be working on what's in front of the TB and what's behind the LT's.
Is this through an auto? What kind of dyno?
I'd be working on what's in front of the TB and what's behind the LT's.
where at in NoVa are you?
05-07-2013, 06:05 PM
#4
something is definately off in your build if you only put down 475.
05-07-2013, 06:06 PM
#5
How high are you wanting to spin the motor? A bigger cam will spin it higher, but with your M6 will you be able to easy it around in traffic? All you are doing is moving the torque peak up and killing low end umph with a bigger cam. Im a fan of small cams with the L92 heads and let those big ports pull the top end.
My stock cube LS3 just went from 20 to 85 MPH in less than 6 seconds in a road test with a 2200rpm stall on street tires through an auto, rolling into the throttle with a baby 220-230 at .050 cam and I didn't even get in the meat of the power band because the rev limiter was set at 5500rpms!
Big cams are slugs in street apps when combined with the square port heads ,imo. If its a drag car and you are setting against a 5500 rpm limiter before you dump the clutch, you might want a bigger stick. Street car, Id go smaller than the cam you are running now.
My stock cube LS3 just went from 20 to 85 MPH in less than 6 seconds in a road test with a 2200rpm stall on street tires through an auto, rolling into the throttle with a baby 220-230 at .050 cam and I didn't even get in the meat of the power band because the rev limiter was set at 5500rpms!
Big cams are slugs in street apps when combined with the square port heads ,imo. If its a drag car and you are setting against a 5500 rpm limiter before you dump the clutch, you might want a bigger stick. Street car, Id go smaller than the cam you are running now.
05-07-2013, 06:12 PM
#6
I'm in Haymarket which is out 66 just past Gainesville and Manassas.
I didn't see you are right down the road in Quantico.
Thanks for your service!
05-07-2013, 06:28 PM
#8
1 7/8 LT's will help. Getting rid of the flowmasters will also. Was this on a load bearing dyno like a Mustang or Dyno Dynamics?
I'm in Haymarket which is out 66 just past Gainesville and Manassas.
I didn't see you are right down the road in Quantico.
Thanks for your service!
I'm in Haymarket which is out 66 just past Gainesville and Manassas.
I didn't see you are right down the road in Quantico.
Thanks for your service!
05-07-2013, 07:07 PM
#10
they arent terrible but I also dont believe they are where they should be considering hes on a 408, CNC heads, and good sized cam.
I put down 470 on a cam only stock ls3 bottom end 376 on a notoriously stingy mustang dyno.
I put down 470 on a cam only stock ls3 bottom end 376 on a notoriously stingy mustang dyno.
05-07-2013, 07:27 PM
#11
so do you guys have a better estimate as to where i could be sitting at?
does having a heat soaked IAT effect my power? i still need to relocate it due to running speed density
how much power could i expect to gain by getting 1 7/8 headers and true duals and ditching the choke master?
does having a heat soaked IAT effect my power? i still need to relocate it due to running speed density
how much power could i expect to gain by getting 1 7/8 headers and true duals and ditching the choke master?
05-07-2013, 08:17 PM
#14
With 11:1 you should be able to run 28-30 degrees of lead. These heads love timing! That's one of the things we learned 7 years ago with them I started with 12:1 but could only run 24 degrees of lead. Dropped it to 11:3 and was able to run 28-29 degrees and picked up a bunch of HP. I run 11:3 now with 28 degrees in the 427.
It it's pulling timing because of heat, you're definitely leaving HP on the table.
It it's pulling timing because of heat, you're definitely leaving HP on the table.
05-07-2013, 08:29 PM
#15
With 11:1 you should be able to run 28-30 degrees of lead. These heads love timing! That's one of the things we learned 7 years ago with them I started with 12:1 but could only run 24 degrees of lead. Dropped it to 11:3 and was able to run 28-29 degrees and picked up a bunch of HP. I run 11:3 now with 28 degrees in the 427.
It it's pulling timing because of heat, you're definitely leaving HP on the table.
It it's pulling timing because of heat, you're definitely leaving HP on the table.
05-08-2013, 07:15 AM
#19
480 to 526 by opening a cutout and bypassing the crapmaster, post #17
