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Old 10-04-2012, 10:18 PM   #1
78gmc1
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Need Advice On A lsx Engine

im looking at a 99 lQ4 with a 4l80E behind it i was wondering if it would be worth getting or should i look for a newer ls engine the engine will be used in a 78 gmc swb and be used as a dailiy driver any advice or tips would be helpful thank you
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Old 10-04-2012, 10:32 PM   #2
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Re: Need Advice On A lsx Engine

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Originally Posted by 78gmc1 View Post
im looking at a 99 lQ4 with a 4l80E behind it i was wondering if it would be worth getting or should i look for a newer ls engine the engine will be used in a 78 gmc swb and be used as a dailiy driver any advice or tips would be helpful thank you
A '99 LQ4 will have iron heads & a extended crank flange.
I would pass.....
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Old 10-04-2012, 10:48 PM   #3
78gmc1
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Re: Need Advice On A lsx Engine

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A '99 LQ4 will have iron heads & a extended crank flange.
I would pass.....



would newer ls heads work on it?
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Old 10-04-2012, 11:30 PM   #4
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Re: Need Advice On A lsx Engine

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would newer ls heads work on it?
Yes.
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Old 10-05-2012, 12:12 AM   #5
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Re: Need Advice On A lsx Engine

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A '99 LQ4 will have iron heads & a extended crank flange.
I would pass.....
X2. The newer heads would work on it, but why bother when you can get a newer better engine? JMHO
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Old 10-05-2012, 12:37 PM   #6
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Re: Need Advice On A lsx Engine

Depends on the price you can get it for. You can pick up aluminum 317s for next to nothing, and the rear crank flange isn't really an issue either.
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Old 10-05-2012, 01:29 PM   #7
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Re: Need Advice On A lsx Engine

I would definitely get an lq4. lots of the parts are swappable. You can toss all of these on there and end up with a pretty sweet engine on the cheap

ls2 throttlebody
l92/ls6 heads
ls3/l76 intake (FAST is too expensive for me)
lq9 pistons if you are staying NA
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Old 10-06-2012, 02:03 AM   #8
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Re: Need Advice On A lsx Engine

99's also had issues with the wiring, in terms of pcm compatability. If everything is together, and a good price then its worth it, otherwise there is ALWAYS another one.
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Old 10-09-2012, 09:33 PM   #9
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Re: Need Advice On A lsx Engine

well i found a 03 lq9 for a good price but the guy has a 2001 4l80e from a lq4 and it has 175xxx miles on it would it be best to find a lower mileage one or rebuild it
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Old 10-09-2012, 10:08 PM   #10
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Re: Need Advice On A lsx Engine

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well i found a 03 lq9 for a good price but the guy has a 2001 4l80e from a lq4 and it has 175xxx miles on it would it be best to find a lower mileage one or rebuild it
A '03 LQ9 is a great engine, Why a 4L80E? LQ9's have 4L65E's behind them.
A 4L80E in a 1/2 ton truck with a stock engine is way overkill.

If the internet had its way.....Everything would have a 4L80E in it
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Old 10-10-2012, 01:28 AM   #11
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Re: Need Advice On A lsx Engine

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Originally Posted by clinebarger View Post
If the internet had its way.....Everything would have a 4L80E in it
yup
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Old 10-10-2012, 07:02 PM   #12
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Re: Need Advice On A lsx Engine

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yup
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