What heads for a N/A 408ci?
Banned
Joined: Oct 2020
Posts: 1,984
Likes: 682
Yrs ago when I came here I came here to Learn about Cylinder Heads.
I found out There is No one Here that was Teaching Anything about a head and there Still isn't.
I did say, see 1 do 1... I'm trying to Copy Darin's work on the spare Head that hit the Water jacket. The Works done just hit a bad spot🤣
Duplicate it and don't hit the Water jacket 😹
It's said that where you spend your Time is Where your Heart is @.
On cylinder heads it's a Birther thing.
I found out There is No one Here that was Teaching Anything about a head and there Still isn't.
I did say, see 1 do 1... I'm trying to Copy Darin's work on the spare Head that hit the Water jacket. The Works done just hit a bad spot🤣
Duplicate it and don't hit the Water jacket 😹
It's said that where you spend your Time is Where your Heart is @.
On cylinder heads it's a Birther thing.
Banned
Joined: Oct 2020
Posts: 1,984
Likes: 682
So I'd rather spend $ and make a head that would have Honestly have Built my 408 🤔 and the Ls3 top end that's Done. Nothing's Needed besides Poly lock nuts 🤫
So again
$3000 on SpeedMasters Ls7 heads + the $2300 that was stolen $ + $1100 new Money Spent on block work?
And I'd do it again to Learn what I did. You can Fool some of the people some of the time but not All the people all the time. You can make Hp with Pretty Much Anything if you know a good guy 👉Who's not bias = they're willing with the Knowledge to Port Anything you may have: a Brand nor manufacturer Has No Meaning it's Just a Cylinder Head and what's your Budget. 243's,Ls3's,Speed Masters, TFS, etc....
So again
$3000 on SpeedMasters Ls7 heads + the $2300 that was stolen $ + $1100 new Money Spent on block work?
And I'd do it again to Learn what I did. You can Fool some of the people some of the time but not All the people all the time. You can make Hp with Pretty Much Anything if you know a good guy 👉Who's not bias = they're willing with the Knowledge to Port Anything you may have: a Brand nor manufacturer Has No Meaning it's Just a Cylinder Head and what's your Budget. 243's,Ls3's,Speed Masters, TFS, etc....
TECH Fanatic
Joined: Jan 2017
Posts: 1,758
Likes: 442
Smokey it's all about airspeed. Find out how much air an engine needs for a given rpm and get that air in as fast as possible. People spend 2300 bucks on heads because some would rather have a head that has far greater airspeed then a gm head. Yes a ported ls3 can make lots of peak power. That doesnt mean it will make more everywhere. And that's just WOT. Not everyone builds cars for max peak power. Fastest car is the one who can accelerate the fastest. Peak numbers are bragging rights that is all.
Also there are many here who attempt to educate. I have posted podcasts with darin Morgan, headgames and godbold many times.
Also there are many here who attempt to educate. I have posted podcasts with darin Morgan, headgames and godbold many times.
Banned
Joined: Oct 2020
Posts: 1,984
Likes: 682
Mamo was showed as a illustration that Copying isn't Some Bad thing and Anyone could Duplicate the thought or a Thought. We all Know factory Ls7 heads have Guide problems but if Fixed it's Possible. No BS.
Besides that look at most of you guys builds, they're Great and most are Similar because it's a great Thought.
But! I've looked @ few, rather a lot, R they not Damn Near a Carbon Copy of one another and Great.
I said do the same thing With any idea you may have on a person's build. Copy Someone's Baseline not Dependant on heads used Factory or aftermarket. Does one Have to just buy Mamo stuff to Duplicate or copy.
Let me know this ... anything after that is BS.
Besides that look at most of you guys builds, they're Great and most are Similar because it's a great Thought.
But! I've looked @ few, rather a lot, R they not Damn Near a Carbon Copy of one another and Great.
I said do the same thing With any idea you may have on a person's build. Copy Someone's Baseline not Dependant on heads used Factory or aftermarket. Does one Have to just buy Mamo stuff to Duplicate or copy.
Let me know this ... anything after that is BS.
Banned
Joined: Oct 2020
Posts: 1,984
Likes: 682
🤣 Who doesn't Know about Airspeed...
factory Ls6 243's with a 2.10 valve has Airspeed what's your point.
Guy says 243's and 600rwhp the 1st thing said is 8500 and it's gotta be something geared towards racing. But let's stick to air Speed.
Measley 408 with a thought out plan made 600 with a plastic intake. Well I'll be darned. With good compression for regular ⛽ gas.
factory Ls6 243's with a 2.10 valve has Airspeed what's your point.
Guy says 243's and 600rwhp the 1st thing said is 8500 and it's gotta be something geared towards racing. But let's stick to air Speed.
Measley 408 with a thought out plan made 600 with a plastic intake. Well I'll be darned. With good compression for regular ⛽ gas.
I could learn a lot from some of the guys here but engine building is hands on IMO. I have a friend that amazes me as to his skill set and nobody better to learn from that I've yet to meet and he'll be the first one to tell you that he's a smart *** because truth be told he actually is.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Banned
Joined: Oct 2020
Posts: 1,984
Likes: 682
Banned
Joined: Oct 2020
Posts: 1,984
Likes: 682
SSTx you may get this it's a Texas thing. That 408 with the 243's and 600rwhp?
Ok Texas Common sense being used. That build if Copied and thought out Couldn't we use TFS/AFR/ All Pro 235's out of the Box to get a similar result. Add porting 4 more if wanted?
Copy...you have the Answers
All I said.
Ok Texas Common sense being used. That build if Copied and thought out Couldn't we use TFS/AFR/ All Pro 235's out of the Box to get a similar result. Add porting 4 more if wanted?
Copy...you have the Answers
All I said.
Last edited by Corona; Jun 6, 2021 at 09:14 AM.
Banned
Joined: Oct 2020
Posts: 1,984
Likes: 682
Threads not derailed. Just a Common Sense problem of if you have a Build thought find one similar and Futher Development there idea as your Own. What's the cam spec's the thread was listed and used as a Example of the use of 243's and 600 rwhp with a 408.
We get back to the point of Anything is great if thought out. Find a build that's near what you may want...
We get back to the point of Anything is great if thought out. Find a build that's near what you may want...
When I look over what Mavn's doing for 408 build I'd say go with the LS3 heads but IDK there's some heavy hitting cathedral stuff out there. 
I been told to expect about 450rwhp from a 370 with 12cc domes, 238/246 cam and non-ported L92's that's not for street car oriented/roll racing scenarios but I'd like to think it will make more than that NA.
I been told to expect about 450rwhp from a 370 with 12cc domes, 238/246 cam and non-ported L92's that's not for street car oriented/roll racing scenarios but I'd like to think it will make more than that NA. Banned
Joined: Oct 2020
Posts: 1,984
Likes: 682
408 Hmmmmm. Figure if I add stroke it will make better Avg numbers? Copy and paste. I did add more cam and stroke with the same heads.
Duh, copy it and up the Ante? SpeedTrigger 402? Copy Ante Up? There thoughts used as my own.
https://ls1tech.com/forums/generatio...hp-484wtq.html
Duh, copy it and up the Ante? SpeedTrigger 402? Copy Ante Up? There thoughts used as my own.
https://ls1tech.com/forums/generatio...hp-484wtq.html
TECH Fanatic
Joined: Jan 2017
Posts: 1,758
Likes: 442
Banned
Joined: Oct 2020
Posts: 1,984
Likes: 682
Cam looks Similar to any other Typical new age Ls7 cam done here.
Know research to see the cam spec's?
https://ls1tech.com/forums/dynamometer-results-comparisons/843097-408cid-all-motor-corvette-601-rwhp.html
hp/tq Differences on a 408 vs a 427 will be seen in Bore Differences not Rpm and Stroke Differences. Cam for either can and could be similar in terms of Duration. Same 4 inch arm being used.
Last edited by Corona; Jun 6, 2021 at 09:58 AM.
