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09-27-2010, 04:46 PM
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#1 |
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Registered User
Join Date: Feb 2009
Location: New Park, PA
Posts: 312
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LQ4 vs LQ9
What is the difference between the lq4 and the lq9? Is one considered better than the other? And which would be a better swap?
Thanks
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Jordan 1972 Chevy K5 Blazer, 6" Lift, 35x13.5R15, 6.0/6L80E/NP205 1982 Chevy C10 SWB, 2006 LS2/4l70e In progress.... http://67-72chevytrucks.com/vboard/s...d.php?t=439860 |
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09-27-2010, 09:13 PM
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#2 |
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Registered User
Join Date: Dec 2009
Location: lindale,tx
Posts: 2,373
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Re: LQ4 vs LQ9
I think the only major difference is the pistons. Not 100% on that tho..
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82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle |
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09-27-2010, 11:07 PM
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#3 |
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Truck and auto performance nut
Join Date: Feb 2007
Location: McKinney,Texas
Posts: 3,848
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Re: LQ4 vs LQ9
....yup and that brings comprssion to like 10:1 for LQ9 vs LQ4 at 9.4:1
( I think those #'s are right... or at least close)
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Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken |
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09-28-2010, 09:11 AM
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#4 |
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Registered User
Join Date: Jan 2009
Location: orangevale, ca
Posts: 3,626
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Re: LQ4 vs LQ9
...and brings horsepower from 320 up to 345 or so.
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"Dennis the Menace" 1978 Silverado (2wd, 1/2 ton, short bed)complete nut & bolt frame off restomod LQ9/4L80E MY LS SWAP/FRAME OFF BUILD BOOK 2006 TBSS way too much to list 
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09-28-2010, 11:17 AM
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#5 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: LQ4 vs LQ9
dished vs flat top pistons is pretty much the only difference. Swap would be 100% the same. Which is better? thats a toss up.
Lq9 comes with slightly higher hp, but usually incurs a slightly higher price for the motor. Lq4 is a 9.4:1 cr, which is preferable if you want to keep the cr #'s low for FI or large shots of spray. Even if you wanted an N/A combo, you may be able to get an lq4 and a milled set of heads (to bring your compression up) for less or close to the cost of an lq9...all depends on the source.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING  |
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09-28-2010, 11:43 PM
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#6 |
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Registered User
Join Date: May 2006
Location: So.Cal
Posts: 542
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Re: LQ4 vs LQ9
Either motor should work for your application.
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