Need Expert input on boosted build
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Staging Lane
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From: Wentzville missouri
Need Expert input on boosted build I have a choice right now to build a supercharged 376 to 427ci motor. I would like to have the 427 as my C6 Z06 came with one originally, however, if it is advantageous to go down in cubes I will do so.
My plan was to order a built ls3 short block from Texas Speed and throw my mast heads on it with about 9.7:1 compression, and add an lsa supercharger as they are pretty cost effective and can put out between 9-12 psi. My horsepower goal is 800whp so I don't think that's unreasonable.
On a side note, I know people are supercharging their Z06's with 11:1 compression with no problem, what is the optimum compression for a built 427 running 10-12psi?
Thanks all in advance.
My plan was to order a built ls3 short block from Texas Speed and throw my mast heads on it with about 9.7:1 compression, and add an lsa supercharger as they are pretty cost effective and can put out between 9-12 psi. My horsepower goal is 800whp so I don't think that's unreasonable.
On a side note, I know people are supercharging their Z06's with 11:1 compression with no problem, what is the optimum compression for a built 427 running 10-12psi?
Thanks all in advance.
I have a choice right now to build a supercharged 376 to 427ci motor. I would like to have the 427 as my C6 Z06 came with one originally, however, if it is advantageous to go down in cubes I will do so.
My plan was to order a built ls3 short block from Texas Speed and throw my mast heads on it with about 9.7:1 compression, and add an lsa supercharger as they are pretty cost effective and can put out between 9-12 psi. My horsepower goal is 800whp so I don't think that's unreasonable.
On a side note, I know people are supercharging their Z06's with 11:1 compression with no problem, what is the optimum compression for a built 427 running 10-12psi?
Thanks all in advance.
My plan was to order a built ls3 short block from Texas Speed and throw my mast heads on it with about 9.7:1 compression, and add an lsa supercharger as they are pretty cost effective and can put out between 9-12 psi. My horsepower goal is 800whp so I don't think that's unreasonable.
On a side note, I know people are supercharging their Z06's with 11:1 compression with no problem, what is the optimum compression for a built 427 running 10-12psi?
Thanks all in advance.
Last edited by oscs; Oct 16, 2015 at 08:27 AM.
Thread Starter
Staging Lane
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From: Wentzville missouri
I understand that you want lower compression to prevent detonation, but an article I read says you want to run the highest compression you can but still keep it low enough to prevent detonation. I'm just wondering if there is a way to determine if a boosted 427 with 9.7:1 compression and 12psi is safe from detonation.
I understand that you want lower compression to prevent detonation, but an article I read says you want to run the highest compression you can but still keep it low enough to prevent detonation. I'm just wondering if there is a way to determine if a boosted 427 with 9.7:1 compression and 12psi is safe from detonation.
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Staging Lane
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From: Wentzville missouri
I talked to the guys at Texas speed and they said to get 800whp I would need 18-22psi with a 418 at 9.5:1 compression. I'm not saying I don't think that's right, I'm just wondering if that's a rough estimate or if anyone has achieved 800whp on 12psi.
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lol, look at my sig (it was with a 4l60e not the th400)
Thread Starter
Staging Lane
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From: Wentzville missouri
Thanks for the reply, I'm glad to see at least one 800+hp setup with 12 psi. I'm sure there are others, although I don't know if using a turbo or supercharger makes a difference, boost should be boost right?
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Thread Starter
Staging Lane
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From: Wentzville missouri
Yeah after looking into it I will be using a better supercharger than an LSA, no point in going through an entire build to put a weak supercharger on it. I just like the roots style blowers.
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Joined: Dec 2004
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remember another principle, it's total CFM not boost that matters. Boost is just CFM that's stacked up with no where to go.
I learned a long time ago you can go with better flowing heads, better cam, and boost goes down but power goes up and it's less stressful on the engine.
I'm a fan of high boost and low compression as you can turn down the boost but it's hard to turn down the compression +
for 800 a good cent blower will be easier and allow better intercooling than the LSA without a whole lot more $$$
good luck!
I learned a long time ago you can go with better flowing heads, better cam, and boost goes down but power goes up and it's less stressful on the engine.
I'm a fan of high boost and low compression as you can turn down the boost but it's hard to turn down the compression +
for 800 a good cent blower will be easier and allow better intercooling than the LSA without a whole lot more $$$
good luck!