Stroker kit options 6.0 L76 under 2k
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From: Corpus Christi, TX
Pretty much confirmed the parts I had in my cart lol but he was very efficient and didn't seem to waste any time unlike the last tech I spoke with. Will think things over for minute
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From: Corpus Christi, TX
Well it is now officially ordered so we don't have to deal with my "what to do" posts hopefully for awhile :]
I went with a Eagle 4140 4" crank that needs a reluctor swap that I will manage
Summit LS6125927I 6.125 rods .927 pin
DSS Racing K1921-4030 +10cc pistons with plasma-moly rings
King XP main bearings MB5013XP
King XP narrowed connecting rod bearings MB5013XP
Compression will be somewhere around 10.5-10.8:1 need to find a more accurate way to CC my heads instead of a flimsy piece of plexiglass
After all that it came out to $2,107
A bit upset at myself for not finding the time last week as I could have saved $80 not to mention I didn't think about having to get the damn thing balanced until right after I ordered so there ups the total to $2,350.
But I am happy knowing there will be 408 in my driveway this Christmas :] Compression will be somewhere around 10.5-10.8:1
I went with a Eagle 4140 4" crank that needs a reluctor swap that I will manage
Summit LS6125927I 6.125 rods .927 pin
DSS Racing K1921-4030 +10cc pistons with plasma-moly rings
King XP main bearings MB5013XP
King XP narrowed connecting rod bearings MB5013XP
Compression will be somewhere around 10.5-10.8:1 need to find a more accurate way to CC my heads instead of a flimsy piece of plexiglass
After all that it came out to $2,107
A bit upset at myself for not finding the time last week as I could have saved $80 not to mention I didn't think about having to get the damn thing balanced until right after I ordered so there ups the total to $2,350.
But I am happy knowing there will be 408 in my driveway this Christmas :] Compression will be somewhere around 10.5-10.8:1
Last edited by Guy with a Chevy; Sep 7, 2024 at 10:23 PM.
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From: Corpus Christi, TX
If I was to run this setup on a 200/205 .550 lift cam, stock 832 heads/exhaust would I be hurting the engine or just limiting the potential? I was asked this question and I answered no with a brief explanation of how most stock engines are already limited from the factory not to reduce the potential but rather extend the life of the engine. Now I am wondering if I was right lol but seriously had me thinking is there a way to hurt the engine with not allowing enough flow in the exhaust specifically.
Don't plan to run it like this for long, the money for exhaust will be had eventually soon but definitely before any intake upgrades. I have not decided if I am going to rework the heads honestly was just going to order new LS6 BTR springs and lap them myself with the proper suction cup drill attachment I have.
Who can tell me an approximate dynamic C.R. if the static C.R. is about 10.78:1?
I have also considered porting the heads myself.
Don't plan to run it like this for long, the money for exhaust will be had eventually soon but definitely before any intake upgrades. I have not decided if I am going to rework the heads honestly was just going to order new LS6 BTR springs and lap them myself with the proper suction cup drill attachment I have.
Who can tell me an approximate dynamic C.R. if the static C.R. is about 10.78:1?
I have also considered porting the heads myself.
Last edited by Guy with a Chevy; Sep 8, 2024 at 07:48 PM.
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From: Ohio, Georgia, Nevada, Texas
OP,
We apologize for the delayed response as our forum advisor was on vacation last week. We appreciate your patronage and would like to assure you that you can save money with us throughout the year by checking out our Savings Central section on our website. We've recently introduced the Rewards Program, which replaces the Retail Only Speed Points program, and we also offer the Beat-a-Price Guarantee and special discount programs for active military members and veterans.
Regarding the combo you've put together, based on our calculations, with a 4.030 bore, 4" stroke, 10cc dished pistons, 68cc (823) heads, 0 deck clearance at 9.240, 1.115" compression height of the pistons, and a .051" head gasket, the compression ratio would be around 10.4:1. If you use a .040" head gasket instead, the ratio would be around 10.7:1.
As for the Torkinator SUM-8727R1 cam you've mentioned, it may not be the most suitable option for a 408. We recommend providing more information about your combo and goals so we can assist you further and recommend a more suitable cam.
Feel free to reach out to us via PM if you have any questions about our programs or need further assistance. We're here to help
We apologize for the delayed response as our forum advisor was on vacation last week. We appreciate your patronage and would like to assure you that you can save money with us throughout the year by checking out our Savings Central section on our website. We've recently introduced the Rewards Program, which replaces the Retail Only Speed Points program, and we also offer the Beat-a-Price Guarantee and special discount programs for active military members and veterans.
Regarding the combo you've put together, based on our calculations, with a 4.030 bore, 4" stroke, 10cc dished pistons, 68cc (823) heads, 0 deck clearance at 9.240, 1.115" compression height of the pistons, and a .051" head gasket, the compression ratio would be around 10.4:1. If you use a .040" head gasket instead, the ratio would be around 10.7:1.
As for the Torkinator SUM-8727R1 cam you've mentioned, it may not be the most suitable option for a 408. We recommend providing more information about your combo and goals so we can assist you further and recommend a more suitable cam.
Feel free to reach out to us via PM if you have any questions about our programs or need further assistance. We're here to help
Thread Starter
TECH Apprentice
Joined: Jan 2023
Posts: 340
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From: Corpus Christi, TX
OP,
As for the Torkinator SUM-8727R1 cam you've mentioned, it may not be the most suitable option for a 408. We recommend providing more information about your combo and goals so we can assist you further and recommend a more suitable cam.
As for the Torkinator SUM-8727R1 cam you've mentioned, it may not be the most suitable option for a 408. We recommend providing more information about your combo and goals so we can assist you further and recommend a more suitable cam.
I think for the time being with stock heads and exhaust that the .550 lift cam will do just fine. I want power at 12-1500rpm when it goes into 4th gear at 40mph not in the higher band like most. Yes the engine will be limited quite a bit with a lower lift cam but will it hurt it? No all it does is make people here cringe because of the wasted potential that will be opened up eventually. Driving the 6.0 compared to any of the truck I have owned has been so fun I know the added performance of the 408 will be quite pleasant for a great amount of time without me wanting more performance.
If anything I will open up my budget for a reputable tuner instead of doing it myself like I have been. My trims are always healthy verified with wideband but the spark tables in my tune could be better.
But sure go ahead and give us your 2 cents
Last edited by Guy with a Chevy; Sep 13, 2024 at 02:56 PM.
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Alot of people are giving that impression. The answer is going to be more lift and duration here. I may be ordering a Big Truck Torkinator SUM-8728R1 but I have not a clue what springs I would go with. Obviously single beehive would have a shorter lifespan and not be optimal for this setup. If I was going to do that then I would be looking for a set of Johnson lifters which adds another $1000 to the build which I am not open to spending at the moment.
I think for the time being with stock heads and exhaust that the .550 lift cam will do just fine. I want power at 12-1500rpm when it goes into 4th gear at 40mph not in the higher band like most. Yes the engine will be limited quite a bit with a lower lift cam but will it hurt it? No all it does is make people here cringe because of the wasted potential that will be opened up eventually. Driving the 6.0 compared to any of the truck I have owned has been so fun I know the added performance of the 408 will be quite pleasant for a great amount of time without me wanting more performance.
If anything I will open up my budget for a reputable tuner instead of doing it myself like I have been. My trims are always healthy verified with wideband but the spark tables in my tune could be better.
I think for the time being with stock heads and exhaust that the .550 lift cam will do just fine. I want power at 12-1500rpm when it goes into 4th gear at 40mph not in the higher band like most. Yes the engine will be limited quite a bit with a lower lift cam but will it hurt it? No all it does is make people here cringe because of the wasted potential that will be opened up eventually. Driving the 6.0 compared to any of the truck I have owned has been so fun I know the added performance of the 408 will be quite pleasant for a great amount of time without me wanting more performance.
If anything I will open up my budget for a reputable tuner instead of doing it myself like I have been. My trims are always healthy verified with wideband but the spark tables in my tune could be better.
Thread Starter
TECH Apprentice
Joined: Jan 2023
Posts: 340
Likes: 47
From: Corpus Christi, TX
Seems like everyone is avid on big performance but once we start talking of average performance things get numb. I could use as much input as there is I don't know what I'm doing to an extent...
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You're probably correct. However, 68Formula gave you an excellent opinion, which I agree with. A .550 lift cam will be great with the duration he suggested, or maybe even another 2° duration on both I & E. A 408 is a pretty big engine. The bigger an engine is, the more cam it can handle, and needs. Keep in mind that the smaller duration a cam has, the higher compression will be at lower rpm......
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If you want to keep the .550" lift then you could run the SUM-8719R1 209/217 112+1 .550/.550 It'll hit pretty low in a 408.
https://www.summitracing.com/parts/s...5cPGWEwIi-xCh9
https://www.summitracing.com/parts/s...5cPGWEwIi-xCh9
https://www.summitracing.com/parts/cxm-03-01-0110
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From: TX
Scoggin Dickey also has some similar truck cams for a bit cheaper.
I dont like using cheap cams though, har some bad experiences in the past.
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From: Central Cal.
Go to TSPs website and look at their truck cams. They have some nice low duration, low lift cams that fit what you're describing. Designed to run on cheap LS6/LS3 springs too.
Scoggin Dickey also has some similar truck cams for a bit cheaper.
I don't like using cheap cams though, had some bad experiences in the past.
Scoggin Dickey also has some similar truck cams for a bit cheaper.
I don't like using cheap cams though, had some bad experiences in the past.
Cams aren't their main source of business, so they can price them more competitively.
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From: TX
Teching In
Joined: Jun 2008
Posts: 16
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From: San Tan Valley, AZ
Would you guys mind telling me which one of these 2 kits you would go with?!
https://cnc-motorsports.com/catalog/.../category/967/
https://cnc-motorsports.com/gm-ls-6-...e-pistons.html
Not much info on he SRP pistons. I see both have all forged components and I am not too concerned with the 2cc difference in piston volume. The main difference I can see is the SRP has thicker piston rings, is that a optimal for longevity or are they for more compression power at the cost of more wear?
Wow ordering from out of state saves me $200 :]
https://cnc-motorsports.com/catalog/.../category/967/
https://cnc-motorsports.com/gm-ls-6-...e-pistons.html
Not much info on he SRP pistons. I see both have all forged components and I am not too concerned with the 2cc difference in piston volume. The main difference I can see is the SRP has thicker piston rings, is that a optimal for longevity or are they for more compression power at the cost of more wear?
Wow ordering from out of state saves me $200 :]
You're buying for price, buy the cheapest one.
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OP,
It looks like you've sorted out the cam selection for your setup and goals, which is great. At the end of the day, it's all about what works best for you. You've mentioned that you're satisfied with using the SUM-8727R1 Torkinator, and that's awesome with us. Keep us posted once you have it up and running!
It looks like you've sorted out the cam selection for your setup and goals, which is great. At the end of the day, it's all about what works best for you. You've mentioned that you're satisfied with using the SUM-8727R1 Torkinator, and that's awesome with us. Keep us posted once you have it up and running!
Thread Starter
TECH Apprentice
Joined: Jan 2023
Posts: 340
Likes: 47
From: Corpus Christi, TX
OP,
It looks like you've sorted out the cam selection for your setup and goals, which is great. At the end of the day, it's all about what works best for you. You've mentioned that you're satisfied with using the SUM-8727R1 Torkinator, and that's awesome with us. Keep us posted once you have it up and running!
It looks like you've sorted out the cam selection for your setup and goals, which is great. At the end of the day, it's all about what works best for you. You've mentioned that you're satisfied with using the SUM-8727R1 Torkinator, and that's awesome with us. Keep us posted once you have it up and running!