What Ls engine should I go with

[1sik78]

So I'm going to be doing ls swap in my 78. I need suggestions to which engine would be best. I want a street engine I would be happy with 500 horse once upgraded. My options are (these all come with computer and all supporting components)
4.8 with 4l60e $2,300-3,100

5.3 with 4l60e $2,900-3,500

6.0 lq4 or 9 w/4l60e or4l80e $3,300-4,300

5.7 ls1 with 4l60e $4,800-5,800

6.0 ls2 with 4l80e 6sp auto $5,600-6,700

All auto trans all 2wd applications

What is the best starting point to achieve at least 500 horse. N/A. If I buy a less expensive one can I achieve this goal or is it worth getting the LS1 or2 let me know your suggestions please thanks



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[Honky Kong jr]

So I'm going to be doing ls swap in my 78. I need suggestions to which engine would be best. I want a street engine I would be happy with 500 horse once upgraded. My options are (these all come with computer and all supporting components)
4.8 with 4l60e $2,300-3,100

5.3 with 4l60e $2,900-3,500

6.0 lq4 or 9 w/4l60e or4l80e $3,300-4,300

5.7 ls1 with 4l60e $4,800-5,800

6.0 ls2 with 4l80e 6sp auto $5,600-6,700

All auto trans all 2wd applications

What is the best starting point to achieve at least 500 horse. N/A. If I buy a less expensive one can I achieve this goal or is it worth getting the LS1 or2 let me know your suggestions please thanks



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A big block.

 

[yevgenievich]

lq9

 

[1sik78]

lq9

1 vote LQ9 thanks


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[spanky55amg]

turbo 5.3... 650 hp

 

[spanky55amg]

LS1 or 2, the weight will be a big difference. You will need to replace your front suspension springs because of the weight.

There isnt much of a HP difference between the 5.3 and 6.0 to be totally honest.

If you want 500 HP NA, you will need heads, long tube headers, huge ass cam, bigger injectors and tune.

See sig.

Edit... oh yeah, and if you go FI, you will need to gap your piston rings. That said, even if not rebuilt, you could go 800-1000 easily on a stock bottom end. You could go more, but being used, you could mess up bearings. Hitting 500 NA isnt impossible, you'll just need to redefine what driveable is. To me, the huge cam was fine. To others who drove it, hated it.

 

[Honky Kong jr]

I’d say try to find one out of a Trailbazer SS or a Saab aluminum 6.0 for the win.

 

[smoothandlow84]

LQ9...Supercharged and turbo'd...(pull the motor from a vette and a salvage yard) 600 + h.p. will get you noticed.

 

[gpmorgan]

A big block.

BPE 632

 

[74propu]

Or like @Honky Kong jr said go big block or stay on the porch

 

[Honky Kong jr]

BPE 632

Oh yeah. How’s yours doing for ya?

 

[Honky Kong jr]

Or like @Honky Kong jr said go big block or stay on the porch

Because we all know there’s enough wind up toys on the roads....

 

[gpmorgan]

I'm very pleased with it. Runs great. I'm looking to get some dot street radials soon. I think I'm going to try the m&h tire.

 

[Honky Kong jr]

I'm very pleased with it. Runs great. I'm looking to get some dot street radials soon. I think I'm going to try the m&h tire.

Oh that’s good I don’t think I’ve seen a video yet.....lol

 

[gpmorgan]

I've got a couple of short vids when I got it running but can't get them to load on here. My son has been trying to get me to make some and put them on ytube. Mabe soon I'll have a few.