Help between two cams
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Teching In
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Help between two cams Here is my simple daily driver build 2004 CTSV 4000lbs pig, 6 speed manual w/ 3:73 gear
SBE LS6, LS6 intake, 1 3/4 LT headers, 25% Under drive pulley
243’s CNC ported, milled .030 w/pac 1219’s and stock valves
I was about to order and reconfirming PTV clearance on the Cam Motion Titan 4 227/232 113+4 which was recommended by them when he said he would choose the Titan 3 224/228 113+4. He said it would help move the heavy car and pull harder under the curv. He also stated the PTV was better. I’ve been searching dyno graphs but the ls1 titan3 seems to have limited info and I was under the impression the titan4 out preformed the titan3.
More confused I reached out to a well trusted cam guru for a custom cam but he had retired and recommended the BTR Red Hot, he said PTV would clear without fly cutting. 221/24x 113. Is the exhaust PTV to close on the BTR? Funds are tight right now, so buying multiple cams is not feasible.
please, I need some help getting this completed and bolted back together.
SBE LS6, LS6 intake, 1 3/4 LT headers, 25% Under drive pulley
243’s CNC ported, milled .030 w/pac 1219’s and stock valves
I was about to order and reconfirming PTV clearance on the Cam Motion Titan 4 227/232 113+4 which was recommended by them when he said he would choose the Titan 3 224/228 113+4. He said it would help move the heavy car and pull harder under the curv. He also stated the PTV was better. I’ve been searching dyno graphs but the ls1 titan3 seems to have limited info and I was under the impression the titan4 out preformed the titan3.
More confused I reached out to a well trusted cam guru for a custom cam but he had retired and recommended the BTR Red Hot, he said PTV would clear without fly cutting. 221/24x 113. Is the exhaust PTV to close on the BTR? Funds are tight right now, so buying multiple cams is not feasible.
please, I need some help getting this completed and bolted back together.
What is your goal with the car? You want torque or do you want it to pull up top? The BTR cam is probably better overall than the Titan 3, but I'm pretty sure the Titan will walk the BTR out of the gate. A little more info will help. I would putore spring in it if you have not bought them yet. PAC 1272''s would be a step up.
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A bigger cam will almost always "outperform" a smaller one.
Doesn't mean the car will go faster. Doesn't mean it's "better". Doesn't mean It's The One You Want. Just means (usually), on a dyno it'll make more HP.
Among those 3, the Titan 3 looks best to me, for the situation. Still maybe a little "too big" butt should be manageable. They'll all need tuning. The T4 is even more "too big". The BTR cam looks like it's for stock exhaust manifolds and maybe some nitrous; not really right for what you've got.
Doesn't mean the car will go faster. Doesn't mean it's "better". Doesn't mean It's The One You Want. Just means (usually), on a dyno it'll make more HP.
Among those 3, the Titan 3 looks best to me, for the situation. Still maybe a little "too big" butt should be manageable. They'll all need tuning. The T4 is even more "too big". The BTR cam looks like it's for stock exhaust manifolds and maybe some nitrous; not really right for what you've got.
Thread Starter
Teching In
Joined: May 2024
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A bigger cam will almost always "outperform" a smaller one.
Doesn't mean the car will go faster. Doesn't mean it's "better". Doesn't mean It's The One You Want. Just means (usually), on a dyno it'll make more HP.
Among those 3, the Titan 3 looks best to me, for the situation. Still maybe a little "too big" butt should be manageable. They'll all need tuning. The T4 is even more "too big". The BTR cam looks like it's for stock exhaust manifolds and maybe some nitrous; not really right for what you've got.
Doesn't mean the car will go faster. Doesn't mean it's "better". Doesn't mean It's The One You Want. Just means (usually), on a dyno it'll make more HP.
Among those 3, the Titan 3 looks best to me, for the situation. Still maybe a little "too big" butt should be manageable. They'll all need tuning. The T4 is even more "too big". The BTR cam looks like it's for stock exhaust manifolds and maybe some nitrous; not really right for what you've got.
I did find some old post on the Titan 3 stating that they still had power past 6800, which is nice cause I do like to run it in the top every now and then.
Thread Starter
Teching In
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What is your goal with the car? You want torque or do you want it to pull up top? The BTR cam is probably better overall than the Titan 3, but I'm pretty sure the Titan will walk the BTR out of the gate. A little more info will help. I would putore spring in it if you have not bought them yet. PAC 1272''s would be a step up.
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For a daily driven car, go with the smaller Titan 3. You'll be using the power under the curve below 3,000RPM most of the time in traffic and around town, and it will have better manners at "parking lot speeds".
Your heads and exhaust will help make power upstairs without making it miserable around town. For the 2% of the time you want power past 6,000RPM, you won't miss the 5-10hp you may give up compared to the Titan 4.
Your heads and exhaust will help make power upstairs without making it miserable around town. For the 2% of the time you want power past 6,000RPM, you won't miss the 5-10hp you may give up compared to the Titan 4.
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OP,
We'll ditto Cam Motion and the others here. The Titan 3 CXM-03-01-0012 is a great match for this combo. We like looking at cams in terms of valve events at .050" to get the full picture of how a cam will behave in a given combo.
The 41* IVC is in a great spot to help get the 4,000 lb CTSV moving, while the 51* EVO helps it carry power up top to around 6,500+. Then the 3* IVO and -3* EVC balance out to 0* overlap for a nice steady, noticeable idle. Combined with your near 11:1 compression and 3.73 gears, this should be a really fun street combo.
Make sure to run a good Chromoly pushrod. We'd recommend a minimum of 5/16" with a .080" wall for stability. You'll want to measure for pushrod length first, especially with the heads being milled. If Cam Motion is comfortable with the 1219s, we'd be good with that too. Although we really like our .630" lift beehives for .600-.625" lift cams.
As an honorable mention, we'd also recommend our SUM-8715R1 "Ghost cam" that @low2001gmc mentioned. Specs are .600/.575, 222/234, 115+3 with -2* overlap. At .050", valve events are -1* IVO, 43* IVC, 55* EVO, and -1* EVC. Compared to the Titan 3, it'd move the powerband roughly 200-400 RPM to the right while still maintaining excellent street manners and carrying power well to 6,800+ RPM.
Either would work well for your combo and goals. Let us know if we can be of any further assistance. We'll be happy to help!
We'll ditto Cam Motion and the others here. The Titan 3 CXM-03-01-0012 is a great match for this combo. We like looking at cams in terms of valve events at .050" to get the full picture of how a cam will behave in a given combo.
The 41* IVC is in a great spot to help get the 4,000 lb CTSV moving, while the 51* EVO helps it carry power up top to around 6,500+. Then the 3* IVO and -3* EVC balance out to 0* overlap for a nice steady, noticeable idle. Combined with your near 11:1 compression and 3.73 gears, this should be a really fun street combo.
Make sure to run a good Chromoly pushrod. We'd recommend a minimum of 5/16" with a .080" wall for stability. You'll want to measure for pushrod length first, especially with the heads being milled. If Cam Motion is comfortable with the 1219s, we'd be good with that too. Although we really like our .630" lift beehives for .600-.625" lift cams.
As an honorable mention, we'd also recommend our SUM-8715R1 "Ghost cam" that @low2001gmc mentioned. Specs are .600/.575, 222/234, 115+3 with -2* overlap. At .050", valve events are -1* IVO, 43* IVC, 55* EVO, and -1* EVC. Compared to the Titan 3, it'd move the powerband roughly 200-400 RPM to the right while still maintaining excellent street manners and carrying power well to 6,800+ RPM.
Either would work well for your combo and goals. Let us know if we can be of any further assistance. We'll be happy to help!
Thread Starter
Teching In
Joined: May 2024
Posts: 19
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OP,
We'll ditto Cam Motion and the others here. The Titan 3 CXM-03-01-0012 is a great match for this combo. We like looking at cams in terms of valve events at .050" to get the full picture of how a cam will behave in a given combo.
The 41* IVC is in a great spot to help get the 4,000 lb CTSV moving, while the 51* EVO helps it carry power up top to around 6,500+. Then the 3* IVO and -3* EVC balance out to 0* overlap for a nice steady, noticeable idle. Combined with your near 11:1 compression and 3.73 gears, this should be a really fun street combo.
Make sure to run a good Chromoly pushrod. We'd recommend a minimum of 5/16" with a .080" wall for stability. You'll want to measure for pushrod length first, especially with the heads being milled. If Cam Motion is comfortable with the 1219s, we'd be good with that too. Although we really like our .630" lift beehives for .600-.625" lift cams.
As an honorable mention, we'd also recommend our SUM-8715R1 "Ghost cam" that @low2001gmc mentioned. Specs are .600/.575, 222/234, 115+3 with -2* overlap. At .050", valve events are -1* IVO, 43* IVC, 55* EVO, and -1* EVC. Compared to the Titan 3, it'd move the powerband roughly 200-400 RPM to the right while still maintaining excellent street manners and carrying power well to 6,800+ RPM.
Either would work well for your combo and goals. Let us know if we can be of any further assistance. We'll be happy to help!
We'll ditto Cam Motion and the others here. The Titan 3 CXM-03-01-0012 is a great match for this combo. We like looking at cams in terms of valve events at .050" to get the full picture of how a cam will behave in a given combo.
The 41* IVC is in a great spot to help get the 4,000 lb CTSV moving, while the 51* EVO helps it carry power up top to around 6,500+. Then the 3* IVO and -3* EVC balance out to 0* overlap for a nice steady, noticeable idle. Combined with your near 11:1 compression and 3.73 gears, this should be a really fun street combo.
Make sure to run a good Chromoly pushrod. We'd recommend a minimum of 5/16" with a .080" wall for stability. You'll want to measure for pushrod length first, especially with the heads being milled. If Cam Motion is comfortable with the 1219s, we'd be good with that too. Although we really like our .630" lift beehives for .600-.625" lift cams.
As an honorable mention, we'd also recommend our SUM-8715R1 "Ghost cam" that @low2001gmc mentioned. Specs are .600/.575, 222/234, 115+3 with -2* overlap. At .050", valve events are -1* IVO, 43* IVC, 55* EVO, and -1* EVC. Compared to the Titan 3, it'd move the powerband roughly 200-400 RPM to the right while still maintaining excellent street manners and carrying power well to 6,800+ RPM.
Either would work well for your combo and goals. Let us know if we can be of any further assistance. We'll be happy to help!
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From: Ohio, Georgia, Nevada, Texas
We'd recommend the .051" GM NAL-12498544 or the .045" Cometic CGT-C5475-045.
Given the heads have already been milled .030", we'd probably lean toward the .051" gasket. The small compression gain from a thinner gasket isn't worth giving up clearance on a street-driven CTS-V.
That said, we could certainly see going with the .045" Cometic if the short block is untouched and piston to valve clearance is verified. There's really no way to guarantee PTV with any combination over the internet. Verifying PTV is engine building 101 and should always be checked before final assembly.
As for bore size, a head gasket slightly larger than the cylinder bore is completely normal. A stock LS6 is a 3.898" bore, and 3.910" gaskets are very common on stock bore LS1/LS6 combinations. Gasket thickness has a much bigger impact on the combo than a few thousandths of gasket bore diameter.
Regardless of gasket choice, we'd still verify PTV before final assembly. That's cheap insurance and a standard part of any engine build.
