LQ9/LQ4 vs. LS1/LT1
12-18-2006, 06:20 PM
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LQ9/LQ4 vs. LS1/LT1 I have a 76 bird looking to do a conversion on a budget. what are the pros and cons of each setup for the most bang for your buck? ( I will be using a t56 as well) Thanks
12-18-2006, 08:09 PM
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The LQ motors run a little cheaper but weigh about 75 pounds more. They're also 6.0 litters as opposed to the 5.7 Ls1. You'll have to switch to an F body oil pan for ground clearence and possible an Ls1 intake manifold. I think that the accesories are set up a little differently but thats not really an issue. The computer can be reprogramed and you could change the cam if you're looking for more hourse power. I plan to do an LQ9 in my T/A. There a little bit stronger than the LQ4 because they come with stronger rods and the compression is higher due to flat top pistons which bring to I think 10:1. Theres a thread on here with some cool desktop dyno stuff if your interested in what you could do with the LQ motors.
12-20-2006, 08:19 AM
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The LQ4s are cheap; I picked up a complete 2002 LQ4 with 50k on it for $1,300. An LQ9 is just an LQ4 with different heads to bump the compression. Personally, I think the LQ9 is a waste of money. Also, if you get an LQ4 that is a 2002 or later you can sell the heads (aluminum 317's) off of it for a decent amount. With the LQ9 you are probably going to want different heads anyway, so why spend the extra money? I have a set of 2002 241s with about 20k on them without rockers and an LS1 intake with LS6 injectors and fuel rail if you would be interested. I was going to do a 6.0 swap but ran out of money. I would take $140 for the heads and $110 for the intake.
12-20-2006, 08:32 PM
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Originally Posted by B4CU
The LQ4s are cheap; I picked up a complete 2002 LQ4 with 50k on it for $1,300. An LQ9 is just an LQ4 with different heads to bump the compression. Personally, I think the LQ9 is a waste of money. Also, if you get an LQ4 that is a 2002 or later you can sell the heads (aluminum 317's) off of it for a decent amount. With the LQ9 you are probably going to want different heads anyway, so why spend the extra money? I have a set of 2002 241s with about 20k on them without rockers and an LS1 intake with LS6 injectors and fuel rail if you would be interested. I was going to do a 6.0 swap but ran out of money. I would take $140 for the heads and $110 for the intake.
I agree that the LQ motors are a great deal compared to LS1s, especially if you want to go FI in the future.
12-21-2006, 04:24 PM
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Originally Posted by Oskar
LQ4s and LQ9s both have 317 heads. It's the pistons that give the LQ9 a little higher compression.
I agree that the LQ motors are a great deal compared to LS1s, especially if you want to go FI in the future.
I agree that the LQ motors are a great deal compared to LS1s, especially if you want to go FI in the future.
02-17-2008, 12:16 PM
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I have a 1966 Pontiac Catalina Convertible w/ LQ4-4L80E from a 2003 2500hd Chevy Pickup extended cab. I have converted the oil pan to the f body now I need to convert the intake and cable throttle body. I was told ls6 intake would not work. Can anyone tell me what intake will the truck intake is very tall I would like to go with a shorter one.
02-18-2008, 06:48 AM
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I have a 1966 Pontiac Catalina Convertible w/ LQ4-4L80E from a 2003 2500hd Chevy Pickup extended cab. I have converted the oil pan to the f body now I need to convert the intake and cable throttle body. I was told ls6 intake would not work. Can anyone tell me what intake will the truck intake is very tall I would like to go with a shorter one.
02-20-2008, 12:21 AM
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Generally well, but it all depends on how much PSI you're planning to throw at it. The official CR is reported as 9.41. If anyone is paying attention that's lower than even the Lm7's 9.49. In any case, this is probably good for sub-10PSI boost levels without worrying about detonation.
08-03-2008, 01:28 PM
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i have converted the the accessories with the vintage air front runner its very nice. I have plenty of room no water pump inteferences but I need advise on an intake swap from the lq4 to ls1 or ls6. Fuel rails ,injectors, fuel pressure regulator ,inlet and return lines and throttle body. Any sugestions?
