cv67

Old school vs new

Considering an LSx swap? Do it.
These things are so well thought out you can have your cake (tq,long runners) AND hp. Tried to get some pics inside the runners to show but couldnt get the lighting right.
Long tall outward tapering runners and a huge plenum. Like a long drum ie a bazooka tube with what looks like a tuning/resonance (?!) hole straight back and openings near the roof for the runners. Strange.


Big tall intake dont know if it would fit under a C4. There are a number of others that are much shorter though

Was messing with this one today and found it interesting.

Old vs New




Typical TPI. Long runners yes but all the same size throughout




These appear to have more area than a 1205 Felpro. You can see why airspeed can be kept high with a long runner intake and a large head (this case 205cc gm head on a 5.3)




Gaskets are pretty neat. They just clip on the intake and torque to about 10 lbs. No sealer needed ever

I didnt research things and overtorqued them. Lucky the intake didnt crack or leak....yet.
Two plugs in teh valley house the knock sensors that prompted all this.

Come apart very quicky and easily.


First thing thats ever been touched @127.
You can tell its an oil burner always has been
Can also see where the injector spray has been hitting.




How big they taper out to/ Those supply the opposite bank





Fugly, yes

]


Better....and still fugly.







You can pick these up pretty reasonable, even one of these with just some portwork and a smallish cam can make damn good power.

Respond real well to mods, too.
This one has 127k, some simple TB and intake work woke this up even noticeable in a heavy truck.

Would be a blast in a M6 or higher stall auto C4
Something to consider


Flame away!

87 vette 81 big girl

The cylinder heads are awesome Ron.

The intake is so so I hear.

You want an aftermarket FAST I hear.

12 degree valve inclination angles stock on LS series heads. GOOD

STOCK SBC IS 23 DEGREES. NOT SO GOOD.

All LS engines have 6- Bolt mains- cross bolted like Old Race Hemis had.

LS engines have powdered metal rods( so so reliability at high RPM's above 6K) except LS7 & ZR-1.
The later has titanium connecting rods stock.

6.0 L LQ9 used in pickups & SUV's is the iron cylinder block to have.
Will take a overbore nicely.

The 5.3 L V8's have lasted over 350,000 miles in my area.
Still going strong.
I work on a fleet of Chevy's & GMC's daily.
5.3 L V8's are a sleeper( about same ci as old Chev 327).
They can be bought as low as $300 complete.

Should you use & race a LS engine?
Up to You.
Its what you are comfortable using & racing with I think.

I am holding out for a LQ9 6.0 L V8 to add to my Chevy, Pontiac, & Olds V8 motor pile collection(s).

Or a LS7 & ZR-1 LS engines too.

cv67

Cannot find the link but GM sells a 340ish cfm head for $800 ready to go.

This one uses a 3.62 stroke

Teeny cam in the 190s@ .050 still makes 300hp.

Here is a drop in replacement any of the guys here could use
Torque starts early and motor pulls to 6500?
That cam is around 196/202@.050 or close, .460 lift.

http://www.gmperformanceparts.com/En...5628&engCat=ls


Personally looking for a low mile 6.0...keep these heads/port + small cam off ebay maybe a Z06 or something similar. Same intake with more work to keep the tq. Would pass smog and make outstanding tq.

Keep thinking one of those would rip in a C4.

If EFI is too intimidating they sell a standard intake/ign setup where you can run a carb.

Friend took a junkyard 6.0, put a HR 230@.050 cam in it, carb, 3600 stall, 3.73 gear and is running 10s on it. Amazing.
AND gets good mileage doing it.

whitebrow

I believe you're talking about the L92 heads, they're pretty great although you need a 4" bore (6.0L) to run them.

I was looking for pics of the internals on these intakes a while ago and came across these:

Gen III truck intake:





Gen IV L92 truck intake (has actually shown to make more power than the LS3 intake):







Would love to have one of these engines in my car

steven mack

I read in a car mag that GM finally figured out that 12 inches was the perfect length for the Ls runners.I think it was from plenum to valve.those pics look like a redesigned tune port.

dclafleur

Could you get the truck intake to fit under our stock hoods? I'd still love to drop an LS motor in mine but the damn thing is reliable right now. I'm swapping in a T56 transmission to replace my leaky 4+3 and I'll run the 350 until it just quits or I find myself really really bored..

3D87C4

"Considering an LSx swap? Do it."

ERod is getting close...

Fubar569

If i had to do it all over again...LSx is definitely what i'd do for the time/money invested in the BBC.

Take 5.3/5.7 block. Sleeve. shove crank in. Shove monster cam in. drop heads on. 600hp and 20mpg.

sorta makes the BBC look like a boat anchor.

88BlackZ-51

Silly Ronny....

1985 Corvette

Ron, I see the LSX bug has bitten you hard. I go back and forth between rebuilding a gen 1 block I have and trying an LS swap. I would like to try a decent used LS2. I've decided I'm going the Z/F route. I've seen plenty of swaps with an auto but don't see too many with a Z/F.

RocketSled

And those nylon intakes never EVER heatsoak. Know how I know? Because my big lump of maggie blower heatsoaks like a ****. :|

87 vette 81 big girl

Keep watching ebay & racing junk.com Ron.

You can not believe some of the deals I landed this year.........

Scored for my 87 Vert & my Pontiac muscle cars.

The super rare still goes for top $$.

But I have save hundreds this year if not thousands in the last 3 years watching ebay & buying / getting lucky.

I scored a complete NOS GM early production( made in Cleveland, Ohio- not Mexico) 4L65E planetary gearset for $400.00 last year.
All needle bearing thrust washers, sun gears, planets, ring gears, ect.

Usually runs $1000 - $1500 from GM the whole shabang.

Citing one example.
How could I go wrong with GM NOS 5- pinion planets for my 87 Vert?

Took abuse last year from someone else here on C4 calling it a waste of $$.

LOL

Not really.

BR

jeffp1167

Ahhhhh LS swaps to common these days. Put a nice turboshaft engine in the sucker and really have the wow factor! Or better yet a nice afterburning tubojet and you can bring new meaning to you smoked the competition literally.

Good luck with your swap

cv67

No swap here still finishing a carbed Gen1 for the current toy. It will be the last one too.

Had the intake off the DD and thought some who were unfamiliar might have interest in these. They are nothing like the Gen 1.


With all the threads about trying to get a LTR setup to make power/rpm shoot this is it imo.

Boring for some I know but whatever lol.

5abivt

Ls is incredible. It's a shame they don't fit better or require so much custom fabrication to work in a c4 with a zf really. Hands Down I would have went that route but decided ill just sell the c4 and get a c5/6z and build from there.

dizwiz24

LSx swap is great for all categories of c4 modder's except for item #3.


1. LSx swap is great in a late model (LTx ) c4 that you plan to lighten up and road race.

2. LSx swap is great in any L98 car regardless of if you plan to road race it / or street/strip w/ forced induction.

Im going to get some people who will disagree with me and thats fine....

3. LTx is just-as-good, or arguably the better choice if you plan on building it up forged, and running 20 psi of boost thru it.

Joe B.

See the title of this thread for another category.

dclafleur

I'm curious how you figure on number 3. I know the bottom end on an LTX is basically a gen 1 small block so that forged components are somewhat commodity, but with the 6 bolt mains on an Iron LSX block with forged internals and the incredible intake and head flow you should be able to get the same power out of less boost on an LSX.

whitebrow

I don't think so, I didn't look for the height of the block but the truck intake looks to be taller than the Holley Stealth Ram that we already can't clear.

cv67

Time to cut a hole and mold a scoop on or have COPO work his magic on it


That L92 setup int/heads would be real sweet on a 6.0.
Heard the same thing about that intake vs. LS3

On brute strength think the LSx has it over the prior Gens. Check out the mains on the LSx sometime.