454 vs. 5.3 efi vs. 5.3 carbed

[bloodybigblock]

Originally Posted by 502ms

You know, if you go 6.0 LQ4 or LQ9, you have a whole lot more available to you. From my research, you can get to 460-480 RWHP with LS6 heads and headers on that setup. My 6.0 is being crated up and shipped to me now. I know it is going to be WORLDS better than my 350/TH400 which at best gives me 12mpg with 3.73 gears. I am moreso looking forward to that kind of power in my lightweight stepside. I am putting in a tko600, so fun factor is imminent.

To answer your question, that is what I would do. Don't waste time on a 5.3 or the 454. Don't waste time on carbing it. The EFI will save you on gas, and if you get the 6.0 and modify just a tad, you can really haul @ss. Bonus. Plus if you get a wild hair, supercharger kits are available that add 150HP+ to your setup.

LEON, you must not have read the 1st post lol. I said "daily driving" and "mpg increase". Im not gonna hot rod a crew cab 3/4 ton truck. I wanna drive it daily, im all about saving money if i'm able. Still leaning toward keeping my TH400 because i wont have to move it and its a beast compared to a 4l60e. I dont like buying parts more than once lol.

[bloodybigblock]

Guys, im sorry, i have no idea how to multi-quote or whatever its called. Still leaning on 5.3/th400. I get mixed reviews on 4l60e. Plus if i do that i wont have to move my trans x-member or cut my driveshaft. I can find a set of 3.08 gears and be turn low rpms, all my driving is 45-60mph at the most.

[68GMCCustom]

the 4L80e is like a turbo400 with a OD. Or go all out and get a 4L85e...its even stronger.

[bohmankid]

Well if you're looking to JUST save money, go with the 4.8 or 5.3! If you want more power later, add boost! BTW, swapping an LS motor is not exactly saving money
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[bloodybigblock]

okay...lets learn something today. lets say............................

10mpg @20,000 miles vs 15mpg @20,000 miles. If i drove 20,000 miles and had an extra 5mpg and the cost of gas was 4$ a gallon, id save $2,668 from my little quick math i just did. Also take in consideration that i'd tell my motor/trans and that'd cover alot of cost also. I noticed 454s are not cheap. It's about saving money for the most part,but its hard to throw the thought of a LS swap away when 20,000 miles of driving pays for the whole swap and the BBC/TH400 is extra money lol. Its going in my 67 btw so it actually just makes that project cheaper lol.

[502ms]

LOL. I'm going to daily drive mine. But you can't go wrong with the 5.3. I understand the 4L60 is not very strong. The TH400 is definitely stronger...you can always add that over drive...I forget the name, but they are about 2200
In either case, you are doing the right thing.
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[crossfire84]

Originally Posted by 502ms

LOL. I'm going to daily drive mine. But you can't go wrong with the 5.3. I understand the 4L60 is not very strong. The TH400 is definitely stronger...you can always add that over drive...I forget the name, but they are about 2200
In either case, you are doing the right thing.
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here is the web address www.gearvendors.com

[bloodybigblock]

I can buy 2 4l80e and sell my 400 for that price lol.

[mooseknuckles]

Originally Posted by bloodybigblock

okay...lets learn something today. lets say............................

10mpg @20,000 miles vs 15mpg @20,000 miles. If i drove 20,000 miles and had an extra 5mpg and the cost of gas was 4$ a gallon, id save $2,668 from my little quick math i just did. Also take in consideration that i'd tell my motor/trans and that'd cover alot of cost also. I noticed 454s are not cheap. It's about saving money for the most part,but its hard to throw the thought of a LS swap away when 20,000 miles of driving pays for the whole swap and the BBC/TH400 is extra money lol. Its going in my 67 btw so it actually just makes that project cheaper lol.

.....also another thing to consider is, if you do an LS swap you will also want to drive it more....more mileage more savings....lol. I'd sell the bbc/th400, and get a 5.3/4l60. need more power?...buy a cam for it.

[bloodybigblock]

Originally Posted by mooseknuckles

.....also another thing to consider is, if you do an LS swap you will also want to drive it more....more mileage more savings....lol. I'd sell the bbc/th400, and get a 5.3/4l60. need more power?...buy a cam for it.

EXACTLY!!!!!!!!!!!! Im sure a tuned 5.3 can drive around a ccsb just fine. I only see good things in its future lol

[Super73]

You know, I see all these guys saying that the BBC brings the cool factor to the people looking at our trucks. Let me just tell you how many people are shocked and blown away that there is a LS based motor in my truck.

There is a local car show that I drive my truck to. There are other 60-72 Chevy trucks there, some SBC, some BBC, but only 1 LS based truck. Even with mine looking like a total POS, mine gets the crowds. Maybe it is because it looks like a pile and then people are shocked with the LS?

I think more people are seeing the LS in these trucks as cool vs the BBC. But hey, maybe I am wrong.

Oh, and you know how much fun it is driving around the BBC trucks That is beyonnd cool

[bk2life]

Ever thought of diesel swap?

[Mr. 250r]

If your not going to tow heavy loads or hot rod is might as well go with a 5.3/4l60, i would skip the 4.8 nothing against it but they're both so cheap you might as well get a 5.3 for the extra power

[crossfire84]

I think more people are seeing the LS in these trucks as cool vs the BBC. But hey, maybe I am wrong.

Oh, and you know how much fun it is driving around the BBC trucks That is beyonnd cool [/QUOTE]

you are not wrong, the LS motors are way cool, just had a pile of BBC's in the barn so thats what i used. i can see a LSX in the future.

[bloodybigblock]

Never thought of a diesel swap. Ill just go with a 5.3/ 4l60 with a tune and exhaust. The power will be roughly the same,but the mpg only puts money in my pocket.Shouldn't have much in it after i sell my motor and trans.........btw Ls swaps look way cooler than bbc IMO. Nothing like a rusted/primered truck with a LS efi motor ;-) , i dont give a damn what year it is.

[andrewmp6]

A diesel would give you the best mileage out of the truck but the cost up front is higher then a ls swap.A aftermarket company holley i think makes coil pack covers that look like big block valve covers that would mess with people.

[mooseknuckles]

I think I found the answer you've been looking for.....

[bloodybigblock]

I like the BBC valve covers on the LS motors. Holleys c10 has en. Its a nice looking motor.

Moose, since u make all the money, you can buy that and ship it to me. It'd be an awesome xmas gift.

[bloodybigblock]

I hate posting new threads so answer me this guys. If i install the 5.3/4l60e combo using dirty dingo mounts or mounts that are adjustable, would i even have to move my trans member? The th400 and 4l60e are roughly the same length right? Ive looked through some 73-87 builds but not found any that have removed a th400. I know the th350 is shorter.

[mooseknuckles]

Originally Posted by bloodybigblock

I hate posting new threads so answer me this guys. If i install the 5.3/4l60e combo using dirty dingo mounts or mounts that are adjustable, would i even have to move my trans member? The th400 and 4l60e are roughly the same length right? Ive looked through some 73-87 builds but not found any that have removed a th400. I know the th350 is shorter.

the th700r4 and 4l60e are basically the same size, some th350's are short some have the long tails....you may not have to move the crossmember but if you do it's no big deal, just drill new holes....I swapped from a 700r4 to a 4l80e and didnt have to change much, the motor mounts were stock location, so I'm not sure if that helped or not, but the driveshaftr fit no problem....

[bloodybigblock]

Originally Posted by mooseknuckles

the th700r4 and 4l60e are basically the same size, some th350's are short some have the long tails....you may not have to move the crossmember but if you do it's no big deal, just drill new holes....I swapped from a 700r4 to a 4l80e and didnt have to change much, the motor mounts were stock location, so I'm not sure if that helped or not, but the driveshaftr fit no problem....

i think imma start harassing this guy on my facebook and ask him like 99 questions....... i think his name is john...its the guy with the slammed c10 with a 6.0. You know him lol?

[mrchevy1972]

By a toyota for gas mileage. Put a big block for fun. Just my opinion
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[bloodybigblock]

Originally Posted by mrchevy1972

By a toyota for gas mileage. Put a big block for fun. Just my opinion
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i have a 2012 toyota corolla, it get like 33mpg, but its not a LS swapped crew cab lol

[derrickmanx1]

IMHO you should do what would make you happiest. I think if it was me i'd just stick to the fuel injection on a big block w/4l80e. Wait that's what i'm doing anyway. I'm hoping to get fair fuel mileage so I can drive it very often. I think these trucks are cool no matter what they have under the hood.

[mooseknuckles]

Originally Posted by bloodybigblock

i think imma start harassing this guy on my facebook and ask him like 99 questions....... i think his name is john...its the guy with the slammed c10 with a 6.0. You know him lol?

yeah...he's an awesome guy!...lol.