LS6 block is dead. Can a LQ9 be swapped?
07-18-2018, 09:44 PM
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LS6 block is dead. Can a LQ9 be swapped? My ls6 is dead and my machinist has a lq9 block. He thinks most everything will swap over with no mods. He thinks the knock sensors are in different locations and possibly the cam sensor and will need different head bolts. Are there any different issues known of?
(I will be getting different pistons and bored to match.)
(I will be getting different pistons and bored to match.)
07-18-2018, 10:35 PM
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Hope you don't mind an extra 100# on the front of your car.
07-19-2018, 10:48 PM
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I didn't realize the lq was iron, that kills it.
My machinist said he found the next size up piston but is not sure if it will all clean up and recommended I look for another block.
My machinist said he found the next size up piston but is not sure if it will all clean up and recommended I look for another block.
07-20-2018, 01:25 AM
#7
So what I'm hearing is that you have an opportunity to upgrade to a 4.11" bore...
https://dartonsleeves.com/mid_02.html
https://dartonsleeves.com/mid_02.html
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07-20-2018, 11:49 AM
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Seems a front cover. Cam sensor. Head bolts.knock sensors.vally cover. My only concern would be the new cam sensor and location, does the old computer use the same readings and timing intervals. Basically my only concern is it is it a plug and play with no changes to the computer programming
07-20-2018, 12:58 PM
#11
Seems a front cover. Cam sensor. Head bolts.knock sensors.vally cover. My only concern would be the new cam sensor and location, does the old computer use the same readings and timing intervals. Basically my only concern is it is it a plug and play with no changes to the computer programming
If you want complete plug and play and to not convert anything you'll need a gen 3 motor. That's gonna be an LS1 or LS6 if you want to stick with an aluminum motor. But converting isn't bad at all, and you're likely to find an LS2 for the same price as an LS1 or 6 and I would rather have the LS2 for the 4" bore.
Gen 3 motors have the cam sensor in the back, gen 4 it's in the front timing cover and reads the timing gear instead of reading off the back of the cam. Gen 3 knock sensors are in the valley cover under the intake and gen 4 they are on the sides of the block. It's not too bad converting if you find a gen 4 block for a good deal.
Plug and play conversion box for putting a gen 4 motor where a gen 3 used to be.
https://www.lingenfelter.com/product/L460065397.html
Last edited by 00pooterSS; 07-20-2018 at 01:32 PM.
07-20-2018, 01:01 PM
#12
sooo.... ill ask again how bad is the other block? Ive seen machine shops try and tell people there aluminum blocks are bad just so they can keep them.....
NOT saying this is the case as I have NO IDEA but....... id like to see the cylinder walls if I was you and what was the reason for a rebuild?
NOT saying this is the case as I have NO IDEA but....... id like to see the cylinder walls if I was you and what was the reason for a rebuild?
07-20-2018, 08:31 PM
#13
Also, if you're into road racing or track days, gen IV engines seem to need dry sumps to keep the oil pressure up in sustained turns.
07-21-2018, 01:44 PM
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The block is currently a 3.095 and has some good scratches in it. -22dished pistons. He found some pistons at 3.103 (i think) but was still not sure that would remove 100% of the flaws. I stripped the block and the scratches are there.
I've had low oil pressure for a while, added a lingenfelter oil pump but didn't help all that much. Engine is in a sand car so I'm sure it eats sand here and there.
End issue was a lost rod bearing
I've had low oil pressure for a while, added a lingenfelter oil pump but didn't help all that much. Engine is in a sand car so I'm sure it eats sand here and there.
End issue was a lost rod bearing
07-21-2018, 02:40 PM
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I noticed no difference in general spirited street driving or 1/4 mile performance. For road course stuff it may make a slight difference but I can't say since I don't do that stuff
07-21-2018, 06:39 PM
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Block hangs off the back of the car and can swing you around, may not notice it much but there are thousands out there running the LS and I've yet to see one with an iron. I got lucky today and found a brand new ls6 block, random. Thanks for the info, I'll still look into a gen 4 swap for the next go round.
07-21-2018, 07:16 PM
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This is a Porsche swap? Not mentioned before....
07-21-2018, 08:23 PM
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