INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

Btr Truck Torque Cam

Old Feb 6, 2020 | 07:38 PM
  #11  
Parkboy's Avatar
Thread Starter
Teching In
 
Joined: Aug 2019
Posts: 15
Likes: 1
Default

Originally Posted by Summitracing
OP,

In your case of wanting the most torque between 2000-2500, the BTR torque cam would be the way to go. This is due to the intake valve closing event of 31* ABDC. The earlier we close the intake valve the more compression and torque we build down low. In comparison, our tow cam closes the intake valve at 33* ABDC.
what about this cam how would it do compared to the btr truck torque foe my setup?

Grind Number: HR-206/294-2S-14.55 Operating Range: 1400-5500 RPM Duration Advertised: 270° Intake / 278° Exhaust Duration @ .050'' Lift: 206° Intake / 214° Exhaust Valve Lift w/1.7 Rockers: .500'' Intake / .500'' Exhaust Lobe Separation Angle: 114° Max Lift Angle: 109° ATDC Intake / 119° BTDC Exhaust Open/Close @.050'' Cam Lift: Intake - (6°) ATDC (opens) / 32° ABDC (closes)
Exhaust - 46° BBDC (opens) / (12°) BTDC (closes)
Reply
Old Feb 6, 2020 | 10:09 PM
  #12  
hot66's Avatar
Teching In
15 Year Member
iTrader: (1)
 
Joined: Feb 2008
Posts: 30
Likes: 2
From: Waco, TX
Default

FWIW, I'm running a 6.0 with 10.6 to 1 comp.with the 8719 summit cam in my 08 VortecMax, and I'm very happy with it.
I bought new liftrers, good springs, and pushrods to be safe, and the valvetrain is pretty quiet, even after about 6k miles.
This setup tows great, has solid bottom end, and great throttle response in my case. It feels like I'm driving a a big block truck.
IMO, the 6.0 at 10.6 will make more useable power from idle up to redline with the 8719 cam than the other cams you mentioned.
I even picked up 1 or 2 mpg over my last engine, which was basically an LY6 w/ 9.6 comp with LS9 cam, with lousy bottom end.
Right now I'm in the middle of a 4L80e swap due to the 4L70e giving up 3 and 4th gears, with the full SE header and true dual setup ready to be installed, also.
Can't complain about the 4L70e only lasting 282k miles, with only 4 oil and filter changes and one parking pawl replacement., lol.
Best of luck to you, whatever you choose, please share your results, when you can.
Jeff
.





Reply
Old Feb 7, 2020 | 12:00 PM
  #13  
Summitracing's Avatar
LS1Tech Sponsor
15 Year Member
Loved
Liked
Community Favorite
 
Joined: Jan 2008
Posts: 466
Likes: 251
From: Ohio, Georgia, Nevada, Texas
Default

OP, we see that is the Crane CRN-1449511. For a tow/torque cam in a 6.0 we like this better than the BTR torque cam. The Crane has an IVC of 32* ABDC. We need to correct ourselves on the IVC of the BTR cam. Its lobe separation is 111-1 so its retarded 1 degree. This puts the IVC at 33. The same as our Summit cam. The BTR is smaller than what we would like to recommend for a 6.0. The 6.0 displacement will eat up some duration so don't let the little higher duration of the Crane and our cam scare you. Valve events are similar between the three, and they would share the same characteristics. All things considered, these are still small cams for a 6.0.

For all 3 cams. They will have a smooth idle. They are going to have great driveability and efficiency. They are going to make torque down low.

Let's compare the 3 tow cams being discussed with individual valve events. To pick a "tow cam" for a 6.0 tow pig we would go with the Summit or the Crane. It's not due to sales, we sell all 3. This is due to being ever so slightly larger. We will compare all three for the community and you to decide on a tow cam.


BTR torque cam: Current retail price of $389.00.

.507/.507, 202/202, 111-1 with -20 overlap.

-IVC: 33 ABDC
-IVO: -11 BTDC
-EVO: 31 BBDC
-EVC: -9 ATDC

Summit tow/rv cam: Current retail price of $259.99.

.500/.500, 205/217, 112+2 with -12 overlap.

-IVC: 33 ABDC
-IVO: -8 BTDC
-EVO: 42 BBDC
-EVC: -5 ATDC

Crane truckmax cam: Current retail price of $411.25.

.500/.500, 206/214, 114+5 with -18 overlap.

-IVC: 32 ABDC
-IVO: -6 BTDC
-EVO: 46 BBDC
-EVC: -12 ATDC


KEY:
IVC= Intake Valve Closing
IVO= Intake Valve Opening
EVO= Exhaust Valve Opening
EVC= Exhaust Valve Closing
BTDC= Before Top Dead Center
ATDC= After Top Dead Center
BBDC= Before Bottom Dead Center
ABDC= After Bottom Dead center

IVC: Is building compression and torque down low with closing the valve early. Or using inertial charge longer after BDC and closing the valve later to increase power higher in the rpm range.
IVO: Is basically idle quality..the earlier you open the intake, the more air you're taking in on the downstroke (at the expense of idle vacuum).
EVO: Is blowdown. Most of the blowdown occurs even before BDC because of high residual cylinder pressure. Earlier = better evacuation and less pumping loss on the piston upstroke at high speed vs. slight loss of pressure on piston during last degrees of power stroke for low end
EVC: Is in conjunction with overlap. Most useful with open headers, equal length headers, and primary lengths wave tuned to the intake runner and rpm. We don't place much emphasis on extending this event later as it produces reversion with street performance exhaust systems.


We are not here to just sell parts and leave it be. We are here to actually help the community. We want to help everyone gain knowledge and be more experienced buyers. We are gaining knowledge at the same time reading what the community is saying and interacting with everyone.

Sorry for the long and extensive post but hopefully it will help open some eyes when it comes time to select a camshaft. Keep on truckin.

Old Feb 7, 2020 | 04:07 PM
  #14  
Parkboy's Avatar
Thread Starter
Teching In
 
Joined: Aug 2019
Posts: 15
Likes: 1
Default

Originally Posted by hot66
FWIW, I'm running a 6.0 with 10.6 to 1 comp.with the 8719 summit cam in my 08 VortecMax, and I'm very happy with it.
I bought new liftrers, good springs, and pushrods to be safe, and the valvetrain is pretty quiet, even after about 6k miles.
This setup tows great, has solid bottom end, and great throttle response in my case. It feels like I'm driving a a big block truck.
IMO, the 6.0 at 10.6 will make more useable power from idle up to redline with the 8719 cam than the other cams you mentioned.
I even picked up 1 or 2 mpg over my last engine, which was basically an LY6 w/ 9.6 comp with LS9 cam, with lousy bottom end.
Right now I'm in the middle of a 4L80e swap due to the 4L70e giving up 3 and 4th gears, with the full SE header and true dual setup ready to be installed, also.
Can't complain about the 4L70e only lasting 282k miles, with only 4 oil and filter changes and one parking pawl replacement., lol.
Best of luck to you, whatever you choose, please share your results, when you can.
Jeff
.
That's great to hear. With my setup and stock head gasket I would be at 10.8:1 but I'm being told that's to high for towing and will experience detonation down low, so I was planning to run a thicker gasket to get me to 10.5. Have you had any problems with detonation while towing? How much do you tow? Also are you running 87 octane?
Reply
Old Feb 7, 2020 | 04:10 PM
  #15  
Parkboy's Avatar
Thread Starter
Teching In
 
Joined: Aug 2019
Posts: 15
Likes: 1
Default

Originally Posted by Summitracing
OP, we see that is the Crane CRN-1449511. For a tow/torque cam in a 6.0 we like this better than the BTR torque cam. The Crane has an IVC of 32* ABDC. We need to correct ourselves on the IVC of the BTR cam. Its lobe separation is 111-1 so its retarded 1 degree. This puts the IVC at 33. The same as our Summit cam. The BTR is smaller than what we would like to recommend for a 6.0. The 6.0 displacement will eat up some duration so don't let the little higher duration of the Crane and our cam scare you. Valve events are similar between the three, and they would share the same characteristics. All things considered, these are still small cams for a 6.0.

For all 3 cams. They will have a smooth idle. They are going to have great driveability and efficiency. They are going to make torque down low.

Let's compare the 3 tow cams being discussed with individual valve events. To pick a "tow cam" for a 6.0 tow pig we would go with the Summit or the Crane. It's not due to sales, we sell all 3. This is due to being ever so slightly larger. We will compare all three for the community and you to decide on a tow cam.


BTR torque cam: Current retail price of $389.00.

.507/.507, 202/202, 111-1 with -20 overlap.

-IVC: 33 ABDC
-IVO: -11 BTDC
-EVO: 31 BBDC
-EVC: -9 ATDC

Summit tow/rv cam: Current retail price of $259.99.

.500/.500, 205/217, 112+2 with -12 overlap.

-IVC: 33 ABDC
-IVO: -8 BTDC
-EVO: 42 BBDC
-EVC: -5 ATDC

Crane truckmax cam: Current retail price of $411.25.

.500/.500, 206/214, 114+5 with -18 overlap.

-IVC: 32 ABDC
-IVO: -6 BTDC
-EVO: 46 BBDC
-EVC: -12 ATDC


KEY:
IVC= Intake Valve Closing
IVO= Intake Valve Opening
EVO= Exhaust Valve Opening
EVC= Exhaust Valve Closing
BTDC= Before Top Dead Center
ATDC= After Top Dead Center
BBDC= Before Bottom Dead Center
ABDC= After Bottom Dead center

IVC: Is building compression and torque down low with closing the valve early. Or using inertial charge longer after BDC and closing the valve later to increase power higher in the rpm range.
IVO: Is basically idle quality..the earlier you open the intake, the more air you're taking in on the downstroke (at the expense of idle vacuum).
EVO: Is blowdown. Most of the blowdown occurs even before BDC because of high residual cylinder pressure. Earlier = better evacuation and less pumping loss on the piston upstroke at high speed vs. slight loss of pressure on piston during last degrees of power stroke for low end
EVC: Is in conjunction with overlap. Most useful with open headers, equal length headers, and primary lengths wave tuned to the intake runner and rpm. We don't place much emphasis on extending this event later as it produces reversion with street performance exhaust systems.


We are not here to just sell parts and leave it be. We are here to actually help the community. We want to help everyone gain knowledge and be more experienced buyers. We are gaining knowledge at the same time reading what the community is saying and interacting with everyone.

Sorry for the long and extensive post but hopefully it will help open some eyes when it comes time to select a camshaft. Keep on truckin.
Thanks for the info. This helps me make my decision. Will call and order from you.
Reply
Old Feb 7, 2020 | 07:19 PM
  #16  
Parkboy's Avatar
Thread Starter
Teching In
 
Joined: Aug 2019
Posts: 15
Likes: 1
Default

Originally Posted by Summitracing
OP, we see that is the Crane CRN-1449511. For a tow/torque cam in a 6.0 we like this better than the BTR torque cam. The Crane has an IVC of 32* ABDC. We need to correct ourselves on the IVC of the BTR cam. Its lobe separation is 111-1 so its retarded 1 degree. This puts the IVC at 33. The same as our Summit cam. The BTR is smaller than what we would like to recommend for a 6.0. The 6.0 displacement will eat up some duration so don't let the little higher duration of the Crane and our cam scare you. Valve events are similar between the three, and they would share the same characteristics. All things considered, these are still small cams for a 6.0.

For all 3 cams. They will have a smooth idle. They are going to have great driveability and efficiency. They are going to make torque down low.

Let's compare the 3 tow cams being discussed with individual valve events. To pick a "tow cam" for a 6.0 tow pig we would go with the Summit or the Crane. It's not due to sales, we sell all 3. This is due to being ever so slightly larger. We will compare all three for the community and you to decide on a tow cam.


BTR torque cam: Current retail price of $389.00.

.507/.507, 202/202, 111-1 with -20 overlap.

-IVC: 33 ABDC
-IVO: -11 BTDC
-EVO: 31 BBDC
-EVC: -9 ATDC

Summit tow/rv cam: Current retail price of $259.99.

.500/.500, 205/217, 112+2 with -12 overlap.

-IVC: 33 ABDC
-IVO: -8 BTDC
-EVO: 42 BBDC
-EVC: -5 ATDC

Crane truckmax cam: Current retail price of $411.25.

.500/.500, 206/214, 114+5 with -18 overlap.

-IVC: 32 ABDC
-IVO: -6 BTDC
-EVO: 46 BBDC
-EVC: -12 ATDC


KEY:
IVC= Intake Valve Closing
IVO= Intake Valve Opening
EVO= Exhaust Valve Opening
EVC= Exhaust Valve Closing
BTDC= Before Top Dead Center
ATDC= After Top Dead Center
BBDC= Before Bottom Dead Center
ABDC= After Bottom Dead center

IVC: Is building compression and torque down low with closing the valve early. Or using inertial charge longer after BDC and closing the valve later to increase power higher in the rpm range.
IVO: Is basically idle quality..the earlier you open the intake, the more air you're taking in on the downstroke (at the expense of idle vacuum).
EVO: Is blowdown. Most of the blowdown occurs even before BDC because of high residual cylinder pressure. Earlier = better evacuation and less pumping loss on the piston upstroke at high speed vs. slight loss of pressure on piston during last degrees of power stroke for low end
EVC: Is in conjunction with overlap. Most useful with open headers, equal length headers, and primary lengths wave tuned to the intake runner and rpm. We don't place much emphasis on extending this event later as it produces reversion with street performance exhaust systems.


We are not here to just sell parts and leave it be. We are here to actually help the community. We want to help everyone gain knowledge and be more experienced buyers. We are gaining knowledge at the same time reading what the community is saying and interacting with everyone.

Sorry for the long and extensive post but hopefully it will help open some eyes when it comes time to select a camshaft. Keep on truckin.
Can you post the specs for the 8719. Between the crane and 8719 which would you say will have more torque from idle to 2500 rpm? Also would going to 10.8:1 compression change if the crane or 8718 cam would still be ok to run?

Last edited by Parkboy; Feb 7, 2020 at 08:01 PM.
Reply
Old Feb 7, 2020 | 08:08 PM
  #17  
hot66's Avatar
Teching In
15 Year Member
iTrader: (1)
 
Joined: Feb 2008
Posts: 30
Likes: 2
From: Waco, TX
Default

Originally Posted by Parkboy
That's great to hear. With my setup and stock head gasket I would be at 10.8:1 but I'm being told that's to high for towing and will experience detonation down low, so I was planning to run a thicker gasket to get me to 10.5. Have you had any problems with detonation while towing? How much do you tow? Also are you running 87 octane?
I went with the 8719 cam to help minimize possible detonation, and I run 93 all the time.
I did a lot of research and calculating, and used DCR ratios for comparisons with different IVC events and different compression ratios.
My truck has been tuned for 93.
I probably over thought the whole process, and my way may not work for everybody, but I like the results I got.
My towing experience has been great, so good that I forgot that the trailer was back there, and had to make myself slow down.
Even when loaded down I could barely notice the extra weight.
I usually about haul about 3000 or 4000 lbs to max of 7000 lbs. at times, mostly building materials on a 16' flatbed.
Hope that helps.
Reply
Old Feb 8, 2020 | 04:43 PM
  #18  
1redta's Avatar
TECH Enthusiast
20 Year Member
Loved
Liked
Community Favorite
 
Joined: Dec 2004
Posts: 599
Likes: 60
From: fort campbell
Default

I think you’re over thinking these set ups for a negligible difference. Any of the cams will pull hard and if your dcr is calculated to run with your preferred gas you should be fine. the tighter quench you achieve the more efficient you combustion lessening your chance for pre ignition
Reply
Old Feb 8, 2020 | 05:30 PM
  #19  
Parkboy's Avatar
Thread Starter
Teching In
 
Joined: Aug 2019
Posts: 15
Likes: 1
Default

Originally Posted by 1redta
I think you’re over thinking these set ups for a negligible difference. Any of the cams will pull hard and if your dcr is calculated to run with your preferred gas you should be fine. the tighter quench you achieve the more efficient you combustion lessening your chance for pre ignition
Probaly am over thinking it. Just want to make sure I get the best cam for my goals. Here is my setup. Engine still on the stand.
6.0l .030 over
243 heads
10.8:1 compression
6.125 rods
mahle 4032 flat top pistons
stock crank
stock intake
stock exhaust
4l60e w/ stock conv
3:73 rear end
I use this truck to tow only and long distance.
Reply
Old Feb 8, 2020 | 08:27 PM
  #20  
1redta's Avatar
TECH Enthusiast
20 Year Member
Loved
Liked
Community Favorite
 
Joined: Dec 2004
Posts: 599
Likes: 60
From: fort campbell
Default

4l60 is your week link
Reply

Thread Tools
Search this Thread

All times are GMT -5. The time now is 12:03 AM.