Camshaft for single turbo 6.0 LS
Thread Starter
Staging Lane
Joined: Sep 2013
Posts: 97
Likes: 8
Camshaft for single turbo 6.0 LS 3700 pound truck, LS 6.0 swap with a t56 magnum trans. will have a single T4 85mm Turbo on it. Will have a lot of street miles put on it and looking to get into some drag strip time. What camshaft would you go with while being aggressive as possible and not losing a whole lot of street manners?
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LS1Tech Sponsor
Joined: Jan 2008
Posts: 2,230
Likes: 1,515
From: Ohio, Georgia, Nevada, Texas
OP,
We have a good idea of the direction for a cam, but need a little more info to narrow it down. What rear gear are you running, and what tire size? If you only know the P-metric size, that is fine.
Also, just to confirm, this is a RWD truck and not 4WD? Finally, what will the exhaust setup look like after the turbo? Downpipe size, mufflers, or full exhaust plans all help.
That info, along with what others have already asked for, will help us dial in the recommendation.
We have a good idea of the direction for a cam, but need a little more info to narrow it down. What rear gear are you running, and what tire size? If you only know the P-metric size, that is fine.
Also, just to confirm, this is a RWD truck and not 4WD? Finally, what will the exhaust setup look like after the turbo? Downpipe size, mufflers, or full exhaust plans all help.
That info, along with what others have already asked for, will help us dial in the recommendation.
Thread Starter
Staging Lane
Joined: Sep 2013
Posts: 97
Likes: 8
OP,
We have a good idea of the direction for a cam, but need a little more info to narrow it down. What rear gear are you running, and what tire size? If you only know the P-metric size, that is fine.
Also, just to confirm, this is a RWD truck and not 4WD? Finally, what will the exhaust setup look like after the turbo? Downpipe size, mufflers, or full exhaust plans all help.
That info, along with what others have already asked for, will help us dial in the recommendation.
We have a good idea of the direction for a cam, but need a little more info to narrow it down. What rear gear are you running, and what tire size? If you only know the P-metric size, that is fine.
Also, just to confirm, this is a RWD truck and not 4WD? Finally, what will the exhaust setup look like after the turbo? Downpipe size, mufflers, or full exhaust plans all help.
That info, along with what others have already asked for, will help us dial in the recommendation.
LS1Tech Sponsor
Joined: Jan 2008
Posts: 2,230
Likes: 1,515
From: Ohio, Georgia, Nevada, Texas
OP,
It sounds like you want an aggressive idle, but still plan to daily drive the truck and hit the track from time to time. If that’s the case, the SUM-8706R1 stage 2 single turbo cam fits that goal well.
Specs on the 8706R1 are .600/.575, 226/230, 113+4, with 2* of overlap. It has a 4* intake valve opening at .050, which gives it a spicier idle. We also close the exhaust valve 2* BTDC to help control exhaust reversion with a T4 turbo and full exhaust. With only 2* of overlap in a 6.0, ported heads, and 3.73 gears, it is still very livable on the street.
If you are willing to give up some of the “check out my idle” factor in exchange for better street manners, the SUM-8720R1 is also a great fit.
Specs on the 8720R1 are .600/.600, 218/227, 112+2, with 0* of overlap. The idle is smoother than the 8706R1, but still noticeable. It uses a -1* intake valve opening and 0* exhaust valve closing, along with a 39* intake valve closing versus 42* on the 8706R1. The result is boost and torque coming in sooner, with stronger torque from under 3,000 rpm all the way through 6,000 rpm, while still matching peak power.
Richard Holdener’s stage 2 cam comparison is a great example of why you do not need the biggest cam to make strong, usable power. See 17:15 to 18:45 in the video below to see how the 8720R1 stacked up against "stage 2" turbo cams.
So it really comes down to your preference. Do you want a spicier idle with good manners, or the same peak power with a smoother but still noticeable idle and excellent drivability?
Let us know what you’re thinking, and we’ll be happy to help from there.
It sounds like you want an aggressive idle, but still plan to daily drive the truck and hit the track from time to time. If that’s the case, the SUM-8706R1 stage 2 single turbo cam fits that goal well.
Specs on the 8706R1 are .600/.575, 226/230, 113+4, with 2* of overlap. It has a 4* intake valve opening at .050, which gives it a spicier idle. We also close the exhaust valve 2* BTDC to help control exhaust reversion with a T4 turbo and full exhaust. With only 2* of overlap in a 6.0, ported heads, and 3.73 gears, it is still very livable on the street.
If you are willing to give up some of the “check out my idle” factor in exchange for better street manners, the SUM-8720R1 is also a great fit.
Specs on the 8720R1 are .600/.600, 218/227, 112+2, with 0* of overlap. The idle is smoother than the 8706R1, but still noticeable. It uses a -1* intake valve opening and 0* exhaust valve closing, along with a 39* intake valve closing versus 42* on the 8706R1. The result is boost and torque coming in sooner, with stronger torque from under 3,000 rpm all the way through 6,000 rpm, while still matching peak power.
Richard Holdener’s stage 2 cam comparison is a great example of why you do not need the biggest cam to make strong, usable power. See 17:15 to 18:45 in the video below to see how the 8720R1 stacked up against "stage 2" turbo cams.
So it really comes down to your preference. Do you want a spicier idle with good manners, or the same peak power with a smoother but still noticeable idle and excellent drivability?
Let us know what you’re thinking, and we’ll be happy to help from there.
TECH Enthusiast
Joined: Aug 2021
Posts: 507
Likes: 190
Thuck U will Spool Spool RPM IS based on the amount of Overlap/Inlet closing point.
A "Truck" cam could need LOW END Torque (Towing ?)
Overlao (blow through) HELPS LOWER Spool RPM
What is your MAX KPA ?
Lance
A "Truck" cam could need LOW END Torque (Towing ?)
Overlao (blow through) HELPS LOWER Spool RPM
What is your MAX KPA ?
Lance
Thread Starter
Staging Lane
Joined: Sep 2013
Posts: 97
Likes: 8
Thread Starter
Staging Lane
Joined: Sep 2013
Posts: 97
Likes: 8
I plan to learn with this build and if I continue to keep interest afterwards - Ill go steps forward with a better build down the road $$ 
Teching In
Joined: May 2021
Posts: 23
Likes: 6
i run summit stg2 in my 82/96 6.0. 4600# c10 no complaints idles smooth and off boost driveabilty is great .i was worried it was a little too big for this truck i have tried many smaller cams with good luck but no complaints. i do run a 9.5 ptc converter that i consider tight although it will flash to 4k. converter is def neccesary , but anyones grama could drive it to the store and wouldnt know it wasnt a stock eng if they never floored it. .
Staging Lane
Joined: Nov 2022
Posts: 62
Likes: 12
I've got a Summit 8720r1 cam on my truck
it's listed as their stage 2 high lift truck cam but also some literature lists it as their stage 1.5 T4 turbo cam
it's 218/227 112 +2
I chose it for my 10.6 comp forged 6L because the 112 still was right enough for good NA and off turbo power, while not being so tight that dcr was jacked up like crazy, duration was slightly bigger but the motor is big enough to handle it, but it also allows me to rev to 6800rpm and make power
makes power with headers NA from 2500 to 6800rpm and turbo with logs it hits hardest at 3000+ or anything over 2k once the turbo kicks in
currently making 4psi revving to 5400rpm because I don't have enough fuel system.
it's listed as their stage 2 high lift truck cam but also some literature lists it as their stage 1.5 T4 turbo cam
it's 218/227 112 +2
I chose it for my 10.6 comp forged 6L because the 112 still was right enough for good NA and off turbo power, while not being so tight that dcr was jacked up like crazy, duration was slightly bigger but the motor is big enough to handle it, but it also allows me to rev to 6800rpm and make power
makes power with headers NA from 2500 to 6800rpm and turbo with logs it hits hardest at 3000+ or anything over 2k once the turbo kicks in
currently making 4psi revving to 5400rpm because I don't have enough fuel system.
TECH Apprentice
Joined: May 2023
Posts: 394
Likes: 128
From: Franconia, PA