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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 12-28-2011, 01:05 PM   #1
Cpanthers85
 
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LS3 VS LSX

Looking for some guidance and direction on this... I asked in another post, but it didn't warrant much of an answer...

I have been doing a lot of research lately about doing an LS3 Conversion. Knowing that is going to cost anywhere from $2-3K to do it, I started lookng to see how much a LS3 Crate engine would cost. To my surprise, for about $5k, I could have the LS3. I've done enough research to know that at the end of the day, L99 is still going to die an L99.

Doing some shopping, I've noticed that there are a few different LS3 Crate engines avail. (the 480 HP and the 525 HP just released).

Im assuming that my kooks headers and CAI CAI will all bolt right on. I might have to change my turque converter and possibly the rear gear, but for the most part, I should have a pretty well functioning LS3 in my A6 Camaro with a little pep.

Then I stumbled upon the LSX...

The 376 and the 454. Of course, the 454 peaked my interest, but there isn't a lot of info about them out there.

The Cast iron block and forged pistons is something of interest, but I have no intentions of FI.

Relocating the coil packs is something of concern. And I've also read that the LSX requires special headers...

Can anyone confirm this?

I am leaning towards the LS3 480 Package, figuring this would result in the least amount of reprocussion changes made (rear suspension, gears, etc) and I could always change the cam out later down the road...

Again, any input is greatly apprciated.
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Old 12-28-2011, 01:16 PM   #2
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If you don't have intentions of going FI, no need for ls3 conversion.

Just go with a TSP VVT cam.
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Old 12-28-2011, 04:24 PM   #3
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Quote:
Originally Posted by CC Performance View Post
Ok to answer your questions :

The LSX block is no different than what you have it will bolt right up.
You have LS3 heads and the LSX does as well right? SO the headers are the same... the headers bolt to the heads and the heads bolt to the block so nothing is different as far as that goes.
I thought that the lsx 454 has ls7 heads?
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Old 12-28-2011, 05:11 PM   #4
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So does the LS7 Head use a different header than the LS3 Head? I am thinking the only problem I am going to run into is that the 1 7/8 tubes arent going to be big enough...
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Mods: Kooks Long Tube Headers, RotoFaB EForce CAI, American Thunder Catback Exhaust, PFADT Stage 1 Drag Kit + Front Sway Bar, GM Strut Tower Bar. ZL1 Fuel Pump. Nitto NT05R. RX Catch Can.LS9 Cam and Springs.LS3 Conversion.JRE Fuel Rail Upgrade.Edelbrock Eforce.60# Eforce Injectors.Extreme Racing Tune. 523/495

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Old 12-28-2011, 05:23 PM   #5
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You quoted the LS3 conversion as at an installed price. And the new engine at an uninstalled price seems to me and a helluva price at that. Maybe I'm wrong but unless you go with a bigger engine you'd be way better off having your current engine done.

And, NO, an L99 isn't gonna 'Die and L99'. Only difference after the conversion is the piston heads which is a very minimal difference.

IMO, if you don't go 427 or 454 then I'd keep what you got and modify it.

Like CC said, build your motor to your liking.
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