5.7 vortec vs 5.3l or 6.0 swap

[Supercharged111]

We all have our opinions. I have had 9 trucks with 5.3's, and feel that they are an excellent car motor.

We need an agree emoji.

 

[RedneckWithPaychecks]

We need an agree emoji.

I think this works as that

 

[Supercharged111]

I think this works as that

I meant on the dealios that pop up when you hold/hover the like button.

 

[L31MaxExpress]

We all have our opinions. I have had 9 trucks with 5.3's, and feel that they are an excellent car motor.

I agree with you there. They are a durable engine atleast the Gen3s are when you are just driving a truck to and from the groccery store. Put a trailer behind it, point the whole rig uphill and you have to rev it to the moon to get rolling. Knowing where the torque curve of the 6.0L I built was going to be and that the thing had 3.08 gears, I left the TH400 in the 87 G20 van I 6.0L swapped. It runs about 2,700 rpm at 70 mph.

 

[Erik the Awful]

I've towed with a 5.3 powered Suburban. I thought something was wrong with it because it was so gutless. For trucky truck truckin' I'll take the 350. If I want to spend $5000 to build a hot race motor for a lightweight chassis that's not going to be towing, I'll take the 6.0. You can rebuild a 350 for great towing capability for under $2000, and no LS at that price can match it. For $5000 you can build a 6.0 that no 383 at that price can match. They each have a purpose that they're suited to.

 

[0xDEADBEEF]

I had a TBI 350 and I don't get all the love for it, especially towing. Anytime there was a hill it just got slower and slower and slower ... next thing you know you're going like 35 mph and everyone is flipping you the bird.

 

[618 Syndicate]

I love how everyone seems to not compare apples to apples. A stock Vortec 350 and a stock 5.3 have very similar output, the major difference being where the torque peaks, rather than how much torque they both make at peak. Yes, the Vortec makes more power lower in the rpm band, but a 5.3 is over 300 lb/ft by 2000 rpm, so it's not a exactly slug down low.

 

[L31MaxExpress]

I've towed with a 5.3 powered Suburban. I thought something was wrong with it because it was so gutless. For trucky truck truckin' I'll take the 350. If I want to spend $5000 to build a hot race motor for a lightweight chassis that's not going to be towing, I'll take the 6.0. You can rebuild a 350 for great towing capability for under $2000, and no LS at that price can match it. For $5000 you can build a 6.0 that no 383 at that price can match. They each have a purpose that they're suited to.

My 383 cost me less than that to build and I would definately put it against a 6.0L swap on the same budget, especially in the 1,500-6,000 rpm range. Average torque production a 6.0L is going to come up short of a well built aluminum head 383 and minus the block and re-used intake and headers mine was all new. Hell a good core 6.0L will cost you over $1,000 and to actually get it in, mounted, plumbed and running will be another $1,000-1,500. That leaves you $2,500 to build it.

 

[Dropped88]

My 383 cost me less than that to build and I would definately put it against a 6.0L swap on the same budget, especially in the 1,500-6,000 rpm range. Average torque production a 6.0L is going to come up short of a well built aluminum head 383 and minus the block and re-used intake and headers mine was all new. Hell a good core 6.0L will cost you over $1,000 and to actually get it in, mounted, plumbed and running will be another $1,000-1,500. That leaves you $2,500 to build it.

383 is a worked over 350. Not stock.
So wouldn't it be better to compare a 6.0 to a old 400ci

Cause I thought this was about stock for stock. Once you put money/go fast parts then you end up with infinite combinations and really skews the comparison

 

[L31MaxExpress]

383 is a worked over 350. Not stock.
So wouldn't it be better to compare a 6.0 to a old 400ci

Cause I thought this was about stock for stock. Once you put money/go fast parts then you end up with infinite combinations and really skews the comparison

Stock for stock, my money is on the L31 especially if you tune both. The L31 has alot more torque killed off in the calibration to try to keep the 4L60E in one piece. Stock 350 with a tuned PCM makes more like 370 ft/lbs. I knocked a full second off the vans 0-60 when
it had a stock 5.7L, 4L65E and 3.42s.with PCM tuning. Old 400 was a sub 8:1 compression smog engine with terrible flowing 882 heads. Put some Vortec heads on it, bless it with a roller cam and I am sure it could handle a 6.0L in the torque department. I built a 400 with TBI heads and a mild comp high energy 260 cam. It pulled a class c motorhome with a 4,000 lbs boat behind it with ease. It was a 95 model with 4.10 gears and a 4L80E.