Need Advice On A lsx Engine - The 1947 - Present Chevrolet & GMC Truck Message Board Network

78gmc1 · 10-04-2012, 10:18 PM

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

clinebarger · 10-04-2012, 10:32 PM

Quote:

Originally Posted by 78gmc1

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.....

78gmc1 · 10-04-2012, 10:48 PM

Quote:

Originally Posted by clinebarger

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

would newer ls heads work on it?

clinebarger · 10-04-2012, 11:30 PM

Quote:

Originally Posted by 78gmc1

would newer ls heads work on it?

Yes.

ls1nova71 · 10-05-2012, 12:12 AM

Quote:

Originally Posted by clinebarger

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

Wasted Income · 10-05-2012, 12:37 PM

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.

Billett · 10-05-2012, 01:29 PM

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

BR3W CITY · 10-06-2012, 02:03 AM

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.

78gmc1 · 10-09-2012, 09:33 PM

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

clinebarger · 10-09-2012, 10:08 PM

Quote:

Originally Posted by 78gmc1

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

BR3W CITY · 10-10-2012, 01:28 AM

Quote:

Originally Posted by clinebarger

If the internet had its way.....Everything would have a 4L80E in it

yup

clinebarger · 10-10-2012, 07:02 PM

Quote:

Originally Posted by BR3W CITY

yup

10-04-2012, 10:18 PM	#1
78gmc1 Registered User Join Date: Apr 2012 Location: Ft Mohave,AZ Posts: 65	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

10-05-2012, 12:37 PM	#6
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	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. __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2023 Ford Explorer ST - Twin Turbskis 2023 Ford F150 RCSB - Whipple Supercharged 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

10-05-2012, 01:29 PM	#7
Billett Registered User Join Date: Jun 2012 Location: Pittsgrove, NJ Posts: 1,502	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 __________________ Will 1968 C10 - Project Texa Go 6.0/4L80e 2003 Mitsubishi Lancer Evolution 2002 Ford Excursion 7.3L 2024 Toyota Sienna

10-06-2012, 02:03 AM	#8
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	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. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

10-09-2012, 09:33 PM	#9
78gmc1 Registered User Join Date: Apr 2012 Location: Ft Mohave,AZ Posts: 65	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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