LQ9 vs LQ4 for turbo-build.
11-27-2011, 09:05 PM
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LQ9 vs LQ4 for turbo-build. Well, I've been doing some thinking, and I'm about to jump into the turbo swamp with a 65' Buick Skylark.
However, I've heard some mixed reviews as for reliability.
For starters I'm going to aim for about 600hp with a mostly stock bottom. I know this is achievable, but I have yet to find any hard evidence as to which engine is actually preferable.
What my heart is saying is the LQ4 due to lower compression, which gives in for some higher boost.
However, I've heard some mixed reviews as for reliability.
For starters I'm going to aim for about 600hp with a mostly stock bottom. I know this is achievable, but I have yet to find any hard evidence as to which engine is actually preferable.
What my heart is saying is the LQ4 due to lower compression, which gives in for some higher boost.
11-27-2011, 09:41 PM
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The reason I'm not opting for an LS2 is that weight is of no concern really, although the LS2 is considerably more expensive for me.
Not to mention that I feel safer pulling boost out of an iron block rather than a high compression alu-block wonder.
Not to mention that I feel safer pulling boost out of an iron block rather than a high compression alu-block wonder.
11-27-2011, 09:47 PM
#4
I just mentioned that because of the compression being higher than the LQ9 and people still boost them alll the time.
You'll have more power out of boost with more compression. I'd do an LQ9. That will ensure you get the good connecting rods. And either way they are most likely going to bend once you get up around 1K crank hp for a little while, whether its an LQ9 with 22psi or an LQ4 with 25psi.
You'll have more power out of boost with more compression. I'd do an LQ9. That will ensure you get the good connecting rods. And either way they are most likely going to bend once you get up around 1K crank hp for a little while, whether its an LQ9 with 22psi or an LQ4 with 25psi.
11-27-2011, 09:52 PM
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I just mentioned that because of the compression being higher than the LQ9 and people still boost them alll the time.
You'll have more power out of boost with more compression. I'd do an LQ9. That will ensure you get the good connecting rods. And either way they are most likely going to bend once you get up around 1K crank hp for a little while, whether its an LQ9 with 22psi or an LQ4 with 25psi.
You'll have more power out of boost with more compression. I'd do an LQ9. That will ensure you get the good connecting rods. And either way they are most likely going to bend once you get up around 1K crank hp for a little while, whether its an LQ9 with 22psi or an LQ4 with 25psi.
Once I get up to 1000 crank horsepower?
That won't be a problem most likely, I'm aiming to settle at around 600 - 650bhp for a while before I invest in forged rods/pistons. After all this is going to be a street/strip sleeper.
I mean, who'd suspect getting manhandled in a tan-coloured Buick fron 65' either way?
I'll also be most likely running E85 more or less. But essentially, the LQ9 is the base to build on?
11-27-2011, 10:09 PM
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