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#1 |
Registered User
Join Date: Sep 2018
Location: Albuquerque
Posts: 9
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454 vs LS vs LQ9
I just starting working on a budget build 67 C10 about 4 months ago. Something I've been debating in my head for awhile now is whether I should go with a 454 an LS or LQ9 build. I do plan on installing a 4L80e sometime soon. When ever the build is semi complete and drive able I'll probably only drive it a few times a week to work and back and maybe to the drag strip a couple of times a year for events. I would like to have the 454 with efi because I'm not a fan of fiddling with carburetors. As far as the LS and LQ9 I've always liked the LS and have always wanted one and the LQ9 I like because the block is stronger and can handle more power and I know they relatively the same. In the distant future I would like to add boost for sure. Which ever motor I choose it will have to come from a junkyard.
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#2 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,630
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Re: 454 vs LS vs LQ9
LS covers alot of ground....a LQ9 is a LS...if you want turbo I'd definitely go LS....(Google LS big bang theory)....any of the LS engine can make big power...the LQ9 is getting harder to find and bring big $$$ when you do..I considered doing a LS turbo...but space won't allow it....so I got a LS3 instead....probably cheaper in the long run and has 450ish hp...
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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#3 |
Registered User
Join Date: Dec 2018
Location: Goodyear, AZ
Posts: 59
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Re: 454 vs LS vs LQ9
keep in mind the lq9 is literally nothing more than an lq4 with flat top pistons, nothing more. honestly any ls you choose you cant go wrong with.
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#4 |
Registered User
Join Date: Oct 2016
Location: Dallas Texas
Posts: 3,081
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Re: 454 vs LS vs LQ9
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I'm going to suggest BBC old school style. Even a mild 454 build ( Start with a Craigslist short block, cast iron stock heads, aluminum intake, mild cam, EFI system and headers ) will get you up around 400-500 hp and 400-500 torque. Put your 4L80 behind that and you'll have a beast. No LS required. -klb
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
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#5 |
Registered User
Join Date: Sep 2018
Location: Moss Bluff, LA
Posts: 381
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Re: 454 vs LS vs LQ9
i would use an IRON truck block...with the way the main caps are installed, they take a ton of abuse.
no to mention better handling from the weight loss vs the BBC. |
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#6 |
Registered User
Join Date: Jul 2009
Location: San Jose Ca
Posts: 2,871
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Re: 454 vs LS vs LQ9
I had a 454 and pulled it for a 5.3 that I am turboing. If you want to stick with a big block check out the 8.1's. You can get them pretty cheap and they are set up with EFI and roller cam. The computer will run the 4l80e so you don't need an expensive standalone controller.
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#7 |
Registered User
Join Date: Jun 2014
Location: lakefield,mn
Posts: 566
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Re: 454 vs LS vs LQ9
I am old school. Nothing like a wow factor when you pop the hood with a big block.
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#8 |
F’B’D guy
![]() Join Date: Feb 2004
Location: Texas/Maine
Posts: 2,220
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Re: 454 vs LS vs LQ9
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#9 | |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,247
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Re: 454 vs LS vs LQ9
Around here, if you can even find a 8.1 they are gold plated. I agree that an 8.1 would be the best of both a big block and a LS engine.
Quote:
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#10 |
Registered User
Join Date: Sep 2008
Location: San Carlos, Ca.
Posts: 3,048
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Re: 454 vs LS vs LQ9
8.1 with the cathedral ports are more like the LS in that respect but seem pretty pricey around here.
These L29s are still pretty cheap around here and there is still another version (L19?) that runs a coil per cylinder as well. I pulled mine apart for rebuild just on GP. The machinist that I use said most of the ones that he sees usually have little wear on the rotating assembly likely due to the fuel injection much like an LS. It makes great power with only a few upgrades and a very stock tune. Although I kept mine relatively stock, I think it still shares many more common parts with the previous generation than with the 8.1. IMO, the LS platform has proven itself as a versatile and robust platform for nearly any application. I just happen to like me some big valve covers and the unmistakeable big block sound!
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#11 |
Registered User
Join Date: Jun 2018
Location: Columbus
Posts: 95
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Re: 454 vs LS vs LQ9
i have an lq4 with flat top pistons essentially making it an lq9. Put a cam in, milled the heads and had a shop test it at close to 10:1 compression if I remember correctly. If youre going FI id suggest to start with lq4 as youll have lower compression than lq9 and will have an iron block, or at least all gen iii are.
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#12 |
Registered User
Join Date: Jan 2014
Location: Indpls. , IN
Posts: 795
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Re: 454 vs LS vs LQ9
It's pen and paper time, 2 spreadsheets. One LS, one Big Block. Costs vs output and drivability/personal wants. ....or something along those lines.
If you're leaning one way - then convince yourself, everything else is just opinions or facts thrown-out from an uninvolved point of view.
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Tim K. 84 K30 srw Silverado 454 auto 85 C20 350 C6P auto flatbed 94 K1500 lifted shortbed 350 4 bbl NV4500 |
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#13 | |
Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,073
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Re: 454 vs LS vs LQ9
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#14 |
Registered User
Join Date: Jan 2014
Location: Indpls. , IN
Posts: 795
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Re: 454 vs LS vs LQ9
To be fair,if starting from scratch, a 496 is easy to produce for this comparison - cost wise. Wouldn't really need low gears or a stall.
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Tim K. 84 K30 srw Silverado 454 auto 85 C20 350 C6P auto flatbed 94 K1500 lifted shortbed 350 4 bbl NV4500 |
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#15 |
Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,073
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Re: 454 vs LS vs LQ9
I think the sort of unanswerable question becomes what do people want? My guess is an LS will beat you at the track, but the BB will beat you in the fun department.
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#16 |
Registered User
Join Date: Feb 2011
Location: Under the Truck Dreaming
Posts: 702
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Re: 454 vs LS vs LQ9
I'm a fan of the Dirty Larry build with an 8.1 liter L18. BBC engine mounts work and manifolds or headers. I believe the BBC bell housing is the same also. His work is top notch so not really in the "budget" category.
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Tags |
454, ls1, lsx, lsx big block 4l80e, swap |
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