hello


I was thinking if it is possible to install an ls1 intake and heads on 3rd gen engines L03, LB9 or L98, or maybe only ls1 intake?
I`ve seen a conversions of lt1 intake so why not ls1?

 

I dont believe that it is possible, given that the LS1 is actually 346 cubes. I am not an expert that is just what I am guessing.

 

The LT1 intake conversion works because the dimensions of an LT1 and earlier motors are virtually identical. The LS1 is an all new motor and shares practically nothing w/ earlier motors. If you want LS1 heads & intake - you're going to need the LS1 shortblock to go with them.

 

Not possible. The LS1 is a completely different design than a standard SBC. The LT1 at least kept the same basic design save for the reverse cooling. An LS1 head wouldn't come close to bolting to an L98 or even and LT1. You can though, bolt an LT1 head to an L98 or any other standard SBC but there are slight differences in the coolant passages and steam holes (can be modified to work though). The LS1 intake will not bolt to anything but the LS1 heads as well, even with major modifications. Here are som pics.


LS1 head intake ports


LS1 head exhaust ports


Standard SBC cylinder head


F-Body.com sucks. Here is the link to the LS1 head pics.
http://ls1.fbody.com/car/mods/heads/install.html

 

Anything is possible.

The amount and cost of work you would have to do, and the cost of the camshaft you'd need would make it more expensive than getting an entire LS1 and swapping it in.

 

Thanks for explanation, the reason I wrote this post is because of auctions on Ebay concerning LS1 components such as intake. Strangely intakes are very cheap so are heads, why?? Is this because they are not interchangeable with other GM v8`s? Just look at the prices of tpi or lt1 intakes they are more expensive even the throttlebodies of ls1 are cheaper what is going on?
What surprises me most is that tuned port injection complete (plenum runners intake manifold) is more expensive than the lt1 intake which is better. Now I completely don`t know what to buy.

 

It's supply and demand. There's a low demand for LS1 pull-offs because who's going to want to buy something off a stock LS1 if the only thing you can install it on is on another LS1, which at the very least is stock, too.

LT1 and other SBC parts are pricier because they can, for the most part, work on any Chevy small-block since the sixties, hence the high demand.

The LS1 intake isn't even that great an intake looking at it by itself. What makes the LS1 such a great motor is the total combination of parts that make it up.

 

Yea, the intake on the LS1's I hear could use alot of room for improvement. Check out the latest Car+Driver, there is an article about the war between the 'Big 3'. Check out the intake manifold next to the Chevy guy... and I'll bet you a dollar the block is LS1 based.

The heads will not bolt to a SBC as it sits. The bolts fit right into the center of the water passage holes on the block. Slight problem. The intake? Forget it. Not even remotely close. Only heads it will bolt up to are LS1 heads.

 

The LS1 intakes you are seeing on eBay are most likely non-LS6 intakes. The 97' - 99' C5's & 98'-99' F-bodies didn't get the LS6 intake manifold. The f-bodies that got the newer LS6 design intake supposedly have a 5.3L truck camshaft to detune them to the 310 HP rating.

 

Everything is completely different on the SBC and the Gen III LS1. As for the intakes, there is no difference in the LS1 and LS6 manifolds except the LS6 has no EGR. They flow just about the same amount of air. The difference in the camshaft has nothing to do with the manifold. They put a little bit smaller camshaft in the LS1 from 99-02, the same one that is in the Vette from 99-02.

 

The better fabricators like Hogans can make any intake you want. It can be done, but it will be in aluminum, not composite.

Probably cost around $2k.

 

I was wrong... 6.0L truck cam, & it was 2001 not 2000 that the LS1 got the LS6 intake and truck cam.


01' - 02' cam specs

one more

another

last one

 

so in other words you are saying that the higher horsepower rating of the 01-02's is due to the smaller camshaft combined with the intake that in your opinion flows no more than a normal LS1 intake. Its obvious that the LS6 intake flows a substantial amount more than the LS1 intake, ask any LS1'er.

 

I've seen dyno sheets and flow charts that show that the LS6 manifold doesn't flow substantially more air than the LS1. Say what you will.

 

Come on "LS1 boy" , I am sure you know better than that. The late LS1's actually had a WEAKER cam in them, aka the "truck cam." LS1 motors from 01/02 HAD the LS6 intake stock, and used the weaker cam to detune the motor's power output. The LS6 intake does flow significantly better than the LS1 intake. Why would Holley and SLP produce a clone LS6 intake if it was identical to the LS1 intake? They may look the same externally, but are not even close to identical.

People are getting 10-15 REAR wheel HP out of just adding the LS6 intake on a stock LS1.

Here, strait from SLP:

High Performance Intake Manfiold

The high performance LS-6 Intake Manifold is now available from SLP featuring an EGR modification which enables the use of the vehicles stock EGR system. The new intake's increased plenum volume and massaged runner design results in an impressive gain of up to 15 hp at the rear wheels providing improved 0-60 and ¼ mile acceleration. After installation, the new LS-6 intake manifold looks nearly indistinguishable from the original LS-1 intake manifold making it a direct bolt-on replacement. This manifold package includes all necessary parts, hardware, detailed instructions.

Hope this clears that up.

 

in this instance, this isn't possible. the LS1 heads have 4 headbolts per cylinder. the standard and LT1 heads have 5 head bolts per cylinder.

 

Doesnt mean you cant do it.

 

the LS1 heads are shorter in length. the whole motor is shorter. the cam is shorter. the bore spacing between cylinders are not 4.00" like the standard small block. so still, ain't happening.

 

The bore spacing is the same.

 

sorry but 3.898" bore is not the same as 4.00" the bore spacing in a block will be the same as the bore size when new. if the camshaft is shorter, then the bore spacing will be shorter as well.

http://www.ls1info.com/article.php?sid=202

info from here.

 

How does bore = bore spacing? If the different bore gave you a different bore spacing, wouldn't you end up with a different sized block for 400's vs 350's vs 305's?

 

This assumption is your mistake. Thats not true.

Bore spacing (CL of cylinder to CL of cylinder) is 4.40" on the SBC AND the LS1. Its the only carried over dimension.

 

ok found a site and verified the bore spacing to be 4.40". so, i am wrong about the length of the heads. but unless you want to drill new head bolt holes into an older block, it still isn't happening. because the ls1 has 4 bolts surrounding each cylinder. the older blocks have 5 bolts surrounding each cylinder.

http://www.idavette.net/hib/ls1c.html

then head gaskets are an issue. but i'm sure someone can make a head gasket to fit.

also the bore spacing is not the only thing it shares. they are both 90* v8.

 

also looking on comp cams site, the lifters are the same.

 

The LT1 intake mod isnt really any different, drill here, cut there. The major hurdle isnt how many bolts are around the cylinder, but where they fall. Drilling and tapping the block deck is simple. The factory did the same, and there is no added material on the block deck where the bolts are. Drilling into an empty hole is a problem though. I just dont know how secure it would be. But the cam isnt interchangeable, so you need a custom cam. Its big bucks. You also need to run a distributorless ignition, more money. Financially, it doesnt make any sense.