fakky

Can get a 1998-2000 LS1 5.7 with trans for say $2800

Can get a 2015 5.3 with trans for say $2800


LS1 ~ 340HP

5.3 ~ 350 HP


LS1 has no DOD/VVT ...... and is a true LS

The newer 5.3 have quite good power.




Any pros/cons asides from this ? With the camshaft options these days .....

I though there was a problem with the earlier LS1's pre 2000 cant remmeber.
Has anyone done a newer swap - like a 2017 ?

thx

fakky

also ....

Can you replace the 6l80e with the 4l80 easy enough ??
Anything required after from ECM reflash and tunnel mods ?

JoeNova

The 2015 5.3 will be a gen 5 with direction injection.
You can do a 4L80e but it will needs its own controller, or be converter to manual shift.

fakky

So basically stick with the 6l80e and just modify tunnel.

Dont know anything about direction injection .......

Which way would you go joe ......


L83 or a older LS1.

fakky

http://www.superchevy.com/how-to/eng...-get-familiar/

The fuel is injected into the airstream at extremely high pressure. The result is an optimum swirl effect and improved cooling of the combustion chamber.


So basically like a high pressure fuel rail seen in diesels ?

garygnu

the newer 5.3 should have better rods .

fakky

Wasnt really a problem on the 5.7 though was it ??
Really only looking to start as stock ...... you know how it goes after that but since its going in a 57 truck probably never over 500hp.

Inferring from your comment though you like 5.3 option better ?

Floorman279

iTrader: (11)

personally im not a fan of direct injection due to "excessive" carbon buildup. many vw 2.0 tsi get so bad that it gets to a point where the valves can no longer fully close. it was a sub $1000 job for vw to perform a clean. one of the reasons we got ride of it. the motors are still too new to see if they will have similar issues

RevGTO

iTrader: (12)

What kind of vehicle is this going into? If it's a replacement for a 4th gen I'd definitely go with the LS1 for electronics compatibility.

pantera_efi

iTrader: (1)

Hi Fakky, the "early" LS-1 GEN-III Crankcase is VERY WEAK.

There is a hole between the Main bulkhead AND Camshaft bulkhead of 1" designed for windage improvement.
This crankcase will CRANK between those two locations when HP/RPM is increased past OEM design.
The GM "stated" cylinder distortion problem created by two different head bolt lengths used is another reason I WILL NOT FIT an early Crankcase.

Lance

fakky

Hi

A 57 Chevy panel truck with IFS and 8.8 exploder rear swap.

fakky

Thanks Lance


I'll start reading up on a few L83 swaps.

​​​​​i can do cheaper .... But there's a few of these floating around sub 30k miles

R6cowboy

iTrader: (3)

OP, I wouldn't second guess or think anything Lance would say isn't factual. But, per the bolded text in your above post, I don't think his statement would be anything to worry about and wouldn't let that have much of a deciding factor in your case. If you're serious about no more than 500hp, you shouldn't be past the limits of an early LS1 block. You won't need to spin the motor much past 6,000 rpm, or at all, to get 500hp out of an LS1 block.

fakky

Good point.

I think what I am gathering from this though is most guys here seem to like the newer variants over the older variants.

I'm sure one day I'll own a higher hp LS variant ..... But probably not in my DD 57 truck

So now just looking out for best deal .... If it's older so be it .... But the 350hp stock l83 sure looks interesting from a low mileage and HP perspective

fakky

Anyone done a 2wd conversion using this kit ?

https://transmissioncenter.net/shop/6l80e-camaro-or-4wd-to-2wd-slip-yoke-conversion-kit/

Simple enough ?
Remove tranafercacse and trans tail housing... New shaft and seal .... Bolt back up ?

tberg725

The issue in the pre 2000 ls1s was the rod bolts, sense you say you're not even shooting for over 500hp in the truck I would get the LS1 and be done with it then you dont gotta worry about the direct inj stuff and everything with the LS1 is easy and straight forward makes good power and if you maintain it properly it will run for a vary long time

Floorman279

iTrader: (11)

this. and also as mentioned earlier, if this is going in an already ls equipped vehicle, it would be idiotic to put do the hassle of the lt conversion

fakky

Not sure if your in the wrong thread ? *shrug*


Seems hardest part now is finding a 2WD trans ....... I though the 4WD to 2wd conversion was easier than what it was. Seems like the output shaft is held in place with a snap ring/gear assembly ..... so requires full teardown.

Most guys talk about swapping tailhousings ...... but thats seems more to me for the VSS and physically housing the longer shaft once you remove the Transfer case adapter.

Floorman279

iTrader: (11)

woops missed that

2ToeRacing

iTrader: (5)

Do the LS1 and 4L80 and kick it in the ***. There will be to much **** to change going with the newer 5.3, keep it simple