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408 LSA build

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Old Jan 12, 2023 | 10:35 PM
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From: Commiefornia
Default 408 LSA build

408 6L
dished pistons 11cc mahle
monsterHeads (boost monster)
forged Crank

Cam: May use the tSP Cleetus boost cam

LSA… probably ported Kong X port
TB: (unsure) looking
fuel rail: (unsure)
Fuel pump : dual walbro 525 hellcat
injectors: unsure
——————————————————-
My goals are 800hp + reliable. Not street driven. Mostly dirt miles

i believe I’ll be fine with ported LSA

Looking for cam suggestions or if I should try to save for the 2650?
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Old Jan 13, 2023 | 12:54 AM
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You'll make 800 with the X port.
You're gonna want the biggest TB you can fit.
1300cc injectors
As for the cam, get something that's made for a PD blower, not a turbo(s). I'd talk to Greg Kong and see what he suggests.
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Old Jan 13, 2023 | 06:58 AM
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From: Commiefornia
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Originally Posted by jayyyw
You'll make 800 with the X port.
You're gonna want the biggest TB you can fit.
1300cc injectors
As for the cam, get something that's made for a PD blower, not a turbo(s). I'd talk to Greg Kong and see what he suggests.

thanks .
I was recommended the stage 3 or 4 from Greg So I’ll go with 4
i believe I have a 102 laying around, which would help with costs.
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Old Jan 20, 2023 | 01:27 AM
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From: Commiefornia
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Well I’m going custom cam. And a kong 2650. Really hoping to make
950
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Old Jan 20, 2023 | 04:48 AM
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If you were going with the LSA, you’ll need to spin it faster than stock. I’d look into Griptec (sp) SC pulley.
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Old Jan 20, 2023 | 11:02 AM
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That's a good jump in power capabilities from a 1.9L (even ported) to a 2.65L however it will be a lot easier to hit your moved up line in the sand of 950. Only took 8 days to go from 800+ to 950 lol. Although in your defense, 950 is in line with 800+

The 2650 should be nicely matched to 400ci+ as mentioned you would have had to really spin the 1.9 to achieve the similar results and with the 2650 you'll have a little more leg room left if you want.
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Old Jan 20, 2023 | 11:57 AM
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Originally Posted by ALL ULL C
That's a good jump in power capabilities from a 1.9L (even ported) to a 2.65L however it will be a lot easier to hit your moved up line in the sand of 950. Only took 8 days to go from 800+ to 950 lol. Although in your defense, 950 is in line with 800+

The 2650 should be nicely matched to 400ci+ as mentioned you would have had to really spin the 1.9 to achieve the similar results and with the 2650 you'll have a little more leg room left if you want.
Kinda like when I ran nitrous, 150 shot will be fine and more than I need......one pass later.......let's toss the 250's in.
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Old Jan 21, 2023 | 02:34 PM
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From: Commiefornia
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Originally Posted by ALL ULL C
That's a good jump in power capabilities from a 1.9L (even ported) to a 2.65L however it will be a lot easier to hit your moved up line in the sand of 950. Only took 8 days to go from 800+ to 950 lol. Although in your defense, 950 is in line with 800+

The 2650 should be nicely matched to 400ci+ as mentioned you would have had to really spin the 1.9 to achieve the similar results and with the 2650 you'll have a little more leg room left if you want.
if I understand your statement correctly a ported 1.9 is the equivalent of 2.6? I found a ported non (xported) for $3k With paper work and 2.45 griptec that’s it. I’m looking at the cost associated for the other supplies and it places me in 2650 category with room to grow.

That’s the deciding factor
Ported 1.9 or 2650


Of course I would send the used s/c out for x port upgrade
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Old Jan 22, 2023 | 10:50 AM
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You misunderstood.

408 + ported 1.9L you will still need to spin in it fast to feed that displacement thus you will start taking the supercharger out of it’s efficiency range. Even though I believe the 1.9 doesn’t mind being spun pretty high you are starting to ask a lot of it. That will however create more inlet heat which leads you to have a serious heat exchanger setup in place to combat inlet air temps.

408 + 2.65L will not require as aggressive pulley due to the larger displacement moving more air throughout all of it’s rotor speed. And even more so when rotor speeds starts to get faster it will move more air efficiently.

It really comes down to application and matching blower to displacement which then gives you a better idea on power output to get to there. I’m a drag racing guy, so knowing my weight and ET goal I know what I’d need to move towards for power output.
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Old Jan 23, 2023 | 08:41 AM
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From: Commiefornia
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Originally Posted by ALL ULL C
You misunderstood.

408 + ported 1.9L you will still need to spin in it fast to feed that displacement thus you will start taking the supercharger out of it’s efficiency range. Even though I believe the 1.9 doesn’t mind being spun pretty high you are starting to ask a lot of it. That will however create more inlet heat which leads you to have a serious heat exchanger setup in place to combat inlet air temps.

408 + 2.65L will not require as aggressive pulley due to the larger displacement moving more air throughout all of it’s rotor speed. And even more so when rotor speeds starts to get faster it will move more air efficiently.

It really comes down to application and matching blower to displacement which then gives you a better idea on power output to get to there. I’m a drag racing guy, so knowing my weight and ET goal I know what I’d need to move towards for power output.
thanks for responding. Im not a drag racer, more of a track/lap type build. I want the power when I need it.
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