LQ9 purchased...what mods to do
08-25-2010, 07:35 PM
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LQ9 purchased...what mods to do As the title says I've purchased a LQ9 complete. Current plans are to change cam/head/intake. Any suggestions on combo's? Cam in in debate and probably will go with a fast intake but the heads is unsure.
L92 vs 243? Pros and cons, cost difference or should I have my 317 milled?
Has anyone had any clearance issues with the fast lsxrt? I'm sure I missed a few but feel free the mention anything.
Thanks
L92 vs 243? Pros and cons, cost difference or should I have my 317 milled?
Has anyone had any clearance issues with the fast lsxrt? I'm sure I missed a few but feel free the mention anything.
Thanks
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08-26-2010, 04:49 AM
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So the 90 will bolt on to the l92 head? I didn't think they could. Also would a ls2 or ls6 intake bolt to it and which would be better?
Last edited by colorado808; 08-26-2010 at 06:54 AM.
08-26-2010, 09:21 AM
#12
No the LS6 Intake will not bolt on to the L92 head because they have different shaped intake ports.
The L92 heads are a great setup but one thing you want to keep in mind is that its hard to get good compression in the motor with them. They have a large chamber like the stock heads do so it takes a lot of milling to get them down to a good chamber size. You also want to keep piston to valve clearance in mind as those heads have a pretty large intake valve. I would recommend exploring the 243 heads a little. They start with a smaller chamber, which makes it much easier to get compression back in the motor. If you are going to be daily driving the car you are going to want good compression, without it the motor will seem like a slug down low.
The L92 heads are a great setup but one thing you want to keep in mind is that its hard to get good compression in the motor with them. They have a large chamber like the stock heads do so it takes a lot of milling to get them down to a good chamber size. You also want to keep piston to valve clearance in mind as those heads have a pretty large intake valve. I would recommend exploring the 243 heads a little. They start with a smaller chamber, which makes it much easier to get compression back in the motor. If you are going to be daily driving the car you are going to want good compression, without it the motor will seem like a slug down low.
08-26-2010, 04:53 PM
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No the LS6 Intake will not bolt on to the L92 head because they have different shaped intake ports.
The L92 heads are a great setup but one thing you want to keep in mind is that its hard to get good compression in the motor with them. They have a large chamber like the stock heads do so it takes a lot of milling to get them down to a good chamber size. You also want to keep piston to valve clearance in mind as those heads have a pretty large intake valve. I would recommend exploring the 243 heads a little. They start with a smaller chamber, which makes it much easier to get compression back in the motor. If you are going to be daily driving the car you are going to want good compression, without it the motor will seem like a slug down low.
The L92 heads are a great setup but one thing you want to keep in mind is that its hard to get good compression in the motor with them. They have a large chamber like the stock heads do so it takes a lot of milling to get them down to a good chamber size. You also want to keep piston to valve clearance in mind as those heads have a pretty large intake valve. I would recommend exploring the 243 heads a little. They start with a smaller chamber, which makes it much easier to get compression back in the motor. If you are going to be daily driving the car you are going to want good compression, without it the motor will seem like a slug down low.
08-26-2010, 11:41 PM
#16
The Lq9 has a 4.000-inch bore and the L92 heads will bolt right in with no problem!! the only bad thing like JohnJanz said will be that they have larger combustion chamber 68 or 70 the 243's have 64.5 or so. Ls3 intake 243 heads NO, Ls3 intake L92 heads YES,
08-27-2010, 12:51 AM
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Thanks...just to verify the part #12615355 for the l92 head. Is that $350 assembled or bare? As far as the cam, aside from the custom grind, would any other cams out there work i.e. comp cams, tsp, etc?
