Team Camaro Tech banner

1 - 13 of 13 Posts

·
Premium Member
Joined
·
2,062 Posts
Discussion Starter #1
Whats the difference between these motors? Are only Vortechs put in trucks?
Are the basic motors the same? :confused:
 

·
Banned
Joined
·
21,341 Posts
Stevo,

The Vortec heads have taller ports then our old motors so intake sealing may be a problem.. And they also have the "pony-car" vertical manifold bolt design.. So much for Ford using our rockers!!!

The new LS- jobbers have separated ports both intake and exhaust. They call the intakes, cathedrals b/c they are tall and narrow and have pointed tops so the injectors can fire right at the back of the valves..

I want to put a set of cast-iron LS- type truck heads on an old standard block for the fun of it but I am not equipped to do it!! Just to prove a point that GM didn't need to sh-t-can the old design!!!

Personally I think GM spent a fortune on a new motor when the old motor was THE BEST one in the world!! Bar none!! They spent a fortune on it just like they did the aborted LT-5!!!

FWIW, look at the Vortec chambers and you will see some 500 Cad. motor in them. That tells me that GM knew darn well early on how to make a better SB head then they sold us all those years!!!

As well as the LS- heads only having 4 head bolts around each cylinder!! GM didn't think that was a good idea back in '55 so why is it OK now??????

pdq67
 

·
Premium Member
Joined
·
2,062 Posts
Discussion Starter #4
Isn't the LS-1 motor used in the Vettes?
The reason I ask is not to build one but just know what the difference is.
I have a 6.0 Vortech in my truck. That equates to a 366 cubic inch. A 5.7 Vortech is a 350. (I believe.)
So what is my motor? A stroked 350?

The above questions got off track of the original question.

So head design & intakes are the big difference between LS-1 & Vortech?
Everything else being the same? ie. pistons, crank, block.
 

·
Registered
Joined
·
10,515 Posts
Originally posted by stevo camaro:

So head design & intakes are the big difference between LS-1 & Vortech?
Everything else being the same? ie. pistons, crank, block.
The Vortec 350 is the old familiar small block with slightly different heads and intake manifold. The Vortec heads will bolt up to any of the old school SBC's.

The LS-1 is a new engine from the ground up. I don't believe any of the major components will swap over to the old small blocks.

Not sure what a Vortec 6.0 is?
 

·
Moderator
Joined
·
3,405 Posts
Steve,
The 6.0 "vortec" engine you have in your truck is based on the LS1 platform. The term "Vortec" is basically a marketing term used on both the older style and newer style truck engines even though they are totally different. The LS1 type engines are completely different from the older style small blocks and as far as I know nothing is interchangable.
 

·
Registered
Joined
·
7,796 Posts
Can you say "aluminum."
 

·
Registered
Joined
·
8,305 Posts
my 93 S10 Blazer has "vortec" 4.3 liter v6 in it..
Vortec is Chevy marketing lingo for "truck engine".
as for pdq's ongoing idea of putting the new LS1 heads on an old small block, i might just have to go out to the shop one day and set my LS1 heads on that LT1 shortblock (very close to the old school small block designe except for the reverse cooling passages) i have just to show him ho much different the 2 designs truly are- literally the only measurement that is the same is the bore spacing.
 

·
Registered
Joined
·
709 Posts
As much as I like the first generation motors, I must say the LS1's are a much better motor.

I have a 5.3 in my Yukon and 1st gen 350 in my '97 pickup. The Yukon makes more power and gets better mileage than my old 350 and the 350 is 25 cubic inches bigger than the 5.3.
 

·
Registered
Joined
·
8,305 Posts
the new "gen 3" engines are way beyond the old design. they have features that you'd have to pay big $$$ to put on the old engines.
for exapmle- how much does a set of 15 degree heads and all the supporting hardware (rockers, pushrods, etc) cost for a regular small block? probably as much as or more than buying a whole LS1 crate engine that already has that. the new LS7 427 inch Vette motor has (i think) a 12 degree valve angle- that is top end race car tech on a regular small block, folks, and probably where a good majority of the performance potential comes from in these engines.
plus, i think they are going with aluminum blocks across the board in the next couple of years- how many production aluminum small blocks did they make from 1955 to present? i'd guess approximately zero.
i think that once they figure out the knocking and oil consumtion issues (which they "solved" on the LS7 by torque plate boring and honing the blocks), they will have moved beyond the old stuff for good and proven how good a modern pushrod engine can be.
 

·
Registered
Joined
·
446 Posts
I think rod bearings and lifters are the same, other than that nothing.

The LS1 heads are a 4 bolt design with rod bolts that reach way down into the mains webbing.

There is an article somewhere about installing a 6.0l vortec into an old school K5, something I was interested in doing. It was a huge undertaking.

GM sells a 383 crate engine with the vortec heads that makes big block torque and costs than I expected. That would be a much easier swap than a 6.0l vortec.
 

·
Registered
Joined
·
49 Posts
Vortec is a marketing term...

All the new 4.7, 5.3, and 6.0 truck motors are Gen III designs. basically, they are slight variations of an Iron blocked LS1. The LS1 is of course a 5.7L Aluminum block.

But the valve angle, 6-bolt cross bolted mains are the 2 big selling points.

Cost is the only thing the old school SBC has going for it at this point, the tech and quality is Gen III all the way.
 
1 - 13 of 13 Posts
Top