408 twin turbo cam
408 twin turbo cam looking for some general guidance/recommendations on a cam selection for the following:
"ls 6.0L 408 lunati stroker kit 9.6:1 compression, wiseco pistons, gen 3 lq4 iron block, 821 ls3 heads, ls3 intake, NW 92 throttle body, ls6 valley cover, APS twin turbo kit running precision 6262 dual ball bearing turbos. going into a 6 speed manual transmission 2001 SS camaro. primarily a driver with maybe 3-4 trips a year to the drag strip. assume HP will be around 7-800ish."
summit recommended a 8722r1 which is a stage 3 cam - if that matters. i'm looking for an easy driver, not a lopey, impress my friends cam! anybody use this cam?
appreciate any help.
"ls 6.0L 408 lunati stroker kit 9.6:1 compression, wiseco pistons, gen 3 lq4 iron block, 821 ls3 heads, ls3 intake, NW 92 throttle body, ls6 valley cover, APS twin turbo kit running precision 6262 dual ball bearing turbos. going into a 6 speed manual transmission 2001 SS camaro. primarily a driver with maybe 3-4 trips a year to the drag strip. assume HP will be around 7-800ish."
summit recommended a 8722r1 which is a stage 3 cam - if that matters. i'm looking for an easy driver, not a lopey, impress my friends cam! anybody use this cam?
appreciate any help.
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That cam is 234/238 Duration .625/.605 Lift,115+5. They also recommend a 3,400 RPM Stall converter.
BTR stage 3 is 231/243 .618"/.617" 115+5
BTR also recommend that if you're "If you're running 58-65mm turbochargers, stepping down to the Stage 2 TT cam is a better option." Just some info in case you haven't seen it.
cheers!
BTR stage 3 is 231/243 .618"/.617" 115+5
BTR also recommend that if you're "If you're running 58-65mm turbochargers, stepping down to the Stage 2 TT cam is a better option." Just some info in case you haven't seen it.
cheers!
i was looking at the btr cams as well and like the S2 cam specs. 226/235 .610"/.614" 114+5.
that's why i asked summit about their S1 and S2 cams initially. seems S3 is "too" much.
that's why i asked summit about their S1 and S2 cams initially. seems S3 is "too" much.
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Joined: Jan 2022
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From: Seattle
You might look and see if Richard Holdener has some videos of those TT cams, honestly I've seen so many of his videos they're starting to all blur together. 
. "Generally" the bigger stage cams make more peak HP at high RPM's, and lose power in the lower RPM ranges, so naturally everyone goes to the Stage 3/4 etc, but sometimes the stage 1 or 2 makes for a better driver.
. "Generally" the bigger stage cams make more peak HP at high RPM's, and lose power in the lower RPM ranges, so naturally everyone goes to the Stage 3/4 etc, but sometimes the stage 1 or 2 makes for a better driver. 
LS1Tech Sponsor
Joined: Jan 2008
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From: Ohio, Georgia, Nevada, Texas
OP,
It sounds like you spoke with our phone sales. Typically, if a customer mentions a 408 twin-turbo combo we would recommend one of our stage 3 or larger turbo/twin-turbo cams. However, it sounds like you don't want a lopey radical idle and want this to be easy to get along with.
With that being said the first cam we would think of is the Ghost cam SUM-8715R1. Specs on it are .600/.575, 222/234, 115+3 with -2* of overlap. It's not something we'd typically recommend for a 408 with twins, but if you're looking for a cam that will be easy to get along with this is it. It'll be mild-mannered but when you want to turn the wick up it'll be happy to run out to 6,800+ with a .600" lift beehive. We have our own SUM-174004 .600" lift beehives. If you like added insurance we offer Trickflow .660" lift duals TFS-2500286P.
Example idle video of the Ghost cam.
Another option is our Pro LS stage 2 turbo cam SUM-8706R1. Specs on it are .600/.575, 226/230, 113+4 with 2* of overlap. This is very popular for standard bore/stroke 6.0 applications. It'll have a steady lope but with those extra cubes, it will tame it down some and be easy to get along with. This pulls hard in the mid-range and has a good top-end. It'll be happy out to 7,000+ with either of the spring packages mentioned above.
Example idle video of the 8706R1.
We know our customers like combos so we put together a variety of cam combos for our Pro LS cams.
- For all available Ghost cam combos check here.
- For all available 8706R1 combos check here.
Let us know if we can be of any further assistance. We'll be happy to help!
It sounds like you spoke with our phone sales. Typically, if a customer mentions a 408 twin-turbo combo we would recommend one of our stage 3 or larger turbo/twin-turbo cams. However, it sounds like you don't want a lopey radical idle and want this to be easy to get along with.
With that being said the first cam we would think of is the Ghost cam SUM-8715R1. Specs on it are .600/.575, 222/234, 115+3 with -2* of overlap. It's not something we'd typically recommend for a 408 with twins, but if you're looking for a cam that will be easy to get along with this is it. It'll be mild-mannered but when you want to turn the wick up it'll be happy to run out to 6,800+ with a .600" lift beehive. We have our own SUM-174004 .600" lift beehives. If you like added insurance we offer Trickflow .660" lift duals TFS-2500286P.
Example idle video of the Ghost cam.
Another option is our Pro LS stage 2 turbo cam SUM-8706R1. Specs on it are .600/.575, 226/230, 113+4 with 2* of overlap. This is very popular for standard bore/stroke 6.0 applications. It'll have a steady lope but with those extra cubes, it will tame it down some and be easy to get along with. This pulls hard in the mid-range and has a good top-end. It'll be happy out to 7,000+ with either of the spring packages mentioned above.
Example idle video of the 8706R1.
We know our customers like combos so we put together a variety of cam combos for our Pro LS cams.
- For all available Ghost cam combos check here.
- For all available 8706R1 combos check here.
Let us know if we can be of any further assistance. We'll be happy to help!
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Joined: Jan 2008
Posts: 2,233
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From: Ohio, Georgia, Nevada, Texas
Simple question. Two LS engines make 800 horsepower. One uses a 76/75 and the other is naturally aspirated. Piston’s ring lands and rings the same etc. What are the piston ring end-gaps needed?