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Ls2 408 stroker

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Old Jan 20, 2020 | 11:53 PM
  #881  
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I was looking at re sleeving my LS2.
But for the cost etc it is not worth the expense.
I have also relocated my battery to the trunk of the vehicle and the engine mounts I am using also weigh 2 pounds less than the factory version
So there is already 48 pounds off my front end.
If I install a cast iron block I will only be adding 70lb to the front end in total.
It's not much.
The priority main oiling is another important feature of this block plus it is also rated for 2000hp.
So I ever wanted to boost the engine I know it can handle it no problem.
How much did you pay for the shp lsnext block?

Old Jan 21, 2020 | 12:04 AM
  #882  
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Originally Posted by Launch
I'm sure I would dislike the handling/braking and overall feel of both my LS cars with 120 lbs extra in the front from a cast iron block.
Bortous.. another cheaper and lighter option is a new ls3 block for 3k aud or so from Eagle auto parts in melbourne, throw your rotator in it, new pistons, PRC small bore ls7 heads+ your solid roller or an even bigger one.. I think 416ci with ls7 heads can make 750hp engine. And you will still have a light block. A new LS7 block was only 5k AUdollars last time precision had one on ebay but now they want $6758 so not worth it imo https://www.precisionintl.com/StockS...ch=ls7%20block

Launch the LS7 block is $5300 from LSX performance parts.
The LS3 suggestion is also a good one.
I was looking at this too but I thought it won't really be much different compared to what I have now.
Bore size max is 4.070.
Still restricts what heads I can use.
I would want a block with at least a 4.125 bore size though so I can fit any head I want.
Leaves more options open.
There are so many options for LS7 cylinder heads an not having to use small bore version will also make more power.

Old Jan 21, 2020 | 05:36 AM
  #883  
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So you just done gave up on the 408ci build ?
Old Jan 21, 2020 | 05:46 AM
  #884  
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Originally Posted by Tuskyz28
So you just done gave up on the 408ci build ?
No not at all.
This one is still being done and will be completed and running right.
New engine won't be done for a while.
Old Jan 22, 2020 | 07:28 PM
  #885  
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They locked the 800hp build thread so i'll leave this here..

https://www.facebook.com/story.php?s...4&id=650540763
Old Jan 22, 2020 | 08:13 PM
  #886  
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Launch that's Flyin's build.
Old Jan 22, 2020 | 08:17 PM
  #887  
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If you look at the runner closely you'll notice the epoxy in the runner to match up the CID intake and shrink the port
Old Jan 23, 2020 | 12:03 PM
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I contacted Mast for a recommendation for this new dart block I'm planning on doing.
4.125 bore cast iron 427 engine.
i mentioned a 7500rpm red line and I don't want it feeling lazy in the mid range.
Of course it's cam dependant too.
I was recommended to use 305cc LS7 head.
I'm thinking this head is overkill for this purpose.
What do you guys think?
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Old Jan 23, 2020 | 01:00 PM
  #889  
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Intake choice can eithier make or break the whole build/concept....
Old Jan 23, 2020 | 01:04 PM
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Originally Posted by Tuskyz28
Intake choice can eithier make or break the whole build/concept....
Either an msd from Mamo or a fast tunnel ram.
Tunnel ram will be cheaper for me.
Old Jan 23, 2020 | 05:55 PM
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Originally Posted by bortous
I contacted Mast for a recommendation for this new dart block I'm planning on doing.
4.125 bore cast iron 427 engine.
i mentioned a 7500rpm red line and I don't want it feeling lazy in the mid range.
Of course it's cam dependant too.
I was recommended to use 305cc LS7 head.
I'm thinking this head is overkill for this purpose.
What do you guys think?
I will be running the Mast 285cc LS7 heads on my 427. I was told the 285s are great match for the 427ci n 305s werent need til larger cubes. Like 440ci and up. In this instance, its all about the velocity and CSA "like SmokeyB squawks about". My builder assured me, same money pretty much, so i dont believe there were any other factors influencing him. And im not running a bs pastic intake. Im running a bs carbon fiber crossram with lg n long runners. Just my $.02. No data yet, still waitn to fire it up soon.
Old Jan 23, 2020 | 07:53 PM
  #892  
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👍🤫😉😇🤨🤬😝🤐😢🤣😏🤭 OTB I say it gets no better...
Old Jan 23, 2020 | 08:02 PM
  #893  
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Same build ... resulted in a 2 HP difference using stock Ls7 heads..also the same media company owns both publications.

https://www.hotrod.com/articles/hrdp...top-ls7-heads/

http://www.superchevy.com/how-to/eng...cylinder-heads

Old Jan 24, 2020 | 04:32 AM
  #894  
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Originally Posted by rkupon1
I will be running the Mast 285cc LS7 heads on my 427. I was told the 285s are great match for the 427ci n 305s werent need til larger cubes. Like 440ci and up. In this instance, its all about the velocity and CSA "like SmokeyB squawks about". My builder assured me, same money pretty much, so i dont believe there were any other factors influencing him. And im not running a bs pastic intake. Im running a bs carbon fiber crossram with lg n long runners. Just my $.02. No data yet, still waitn to fire it up soon.
Those crossrams make very good torque,
Are you using the Performance design version?
Old Jan 24, 2020 | 05:02 AM
  #895  
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Yup. And we shall see...Im defly not clearancing my hood until aftr we see what my set up dynos,lol
Old Jan 24, 2020 | 06:38 AM
  #896  
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Originally Posted by rkupon1
Yup. And we shall see...Im defly not clearancing my hood until aftr we see what my set up dynos,lol
Dont get hung up on dyno numbers. So what if it doesn’t hit the number your wanting? Dyno is a tool, and they are all different. If the car runs strong and makes you smile, that’s all that matters.
My setup in a dozen corvettes over on CF makes 650+ all day, but with my very poor tune on dyno day did 616. I couldn’t care less. It drives great and will spin 4th gear on a roll. I’d bet the farm I’m up over 650 wheel, but who cares? Doesn’t matter to me if anybody out there likes it or not. I know Smokey doesn’t. I’ve got two things wrong to him...plastic intake and Mamo heads. LOL.
Old Jan 24, 2020 | 06:46 AM
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Originally Posted by Che70velle
Dont get hung up on dyno numbers. So what if it doesn’t hit the number your wanting? Dyno is a tool, and they are all different. If the car runs strong and makes you smile, that’s all that matters.
My setup in a dozen corvettes over on CF makes 650+ all day, but with my very poor tune on dyno day did 616. I couldn’t care less. It drives great and will spin 4th gear on a roll. I’d bet the farm I’m up over 650 wheel, but who cares? Doesn’t matter to me if anybody out there likes it or not. I know Smokey doesn’t. I’ve got two things wrong to him...plastic intake and Mamo heads. LOL.
I don't get hung up on dyno numbers either but to me it's a sign that the motor is healthy and is doing what it should.
Smokey seems to have mellowed out a bit with intake talk.

Old Jan 24, 2020 | 09:22 AM
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Mine didnt hit the horsepower I expected on engine dyno or chassis dyno. But it's running the numbers at the track with great driving manners. Very responsive and a blast to drive.
Old Jan 24, 2020 | 10:09 AM
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Originally Posted by AINT SKEERED
Mine didnt hit the horsepower I expected on engine dyno or chassis dyno. But it's running the numbers at the track with great driving manners. Very responsive and a blast to drive.
Sounds kind of like where I'm at.
Old Jan 24, 2020 | 10:19 AM
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Yeah 1's wrong. .the intake. Mamo stuff is over priced with avg or Just as much with stock heads, Dyno and ET. If you gonna get a casting get Brodix and get the work done or Mast... DUDES FOR THE Rich with Stock'ish head HP. Most of the power he's getting is compression Vs others Damn sure wasn't impressed with the 454 and 12.5 compression and 775 HP... TSP was only 25 HP off with a factory intake, less compression and a hydraulic roller



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