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Critique the build on our 3.8L SC

4

4birdman

New member
Stock L67 3800 Series II V6 block
ARP Head Studs
ARP Main Studs
Clevite77 Main/Cam/Rod Bearings
Balance Shaft Delete
GM '04+ L32 Powdered Connecting Rods
GM '04+ L32 TTY Rod Bolts
Stock L67 Pistons
INTENSE™ Stage 3 Blower Cam
Double valve springs, titanium retainers, etc (unsure of which, will get some good ones)
Intense-Racing O/R Stock Length Pushrods
Stock L67 Heads ported, 3-angled, cleaned up by local shop
Manley Stainless Steel valves
Ported Lower Intake Manifold Inlet/Runners
Ported Factory M90 Supercharger:
Ported and polished L67 Throttle body
LQ4 MAF Sensor w/ Open Cone Intake Setup
Modular Pulley System: 3.3 right now
180* Thermostat
Speed Daddy headers
Magnaflow cat-back
Stock coil packs (might upgrade later as money allows)
Some form of good CAI intake setup

Thoughts? Suggestions?

We're going to be swapping this into a 98 GT 2-door. Picking up the engine this week sometime so we can start the build on it.
 


Even with roller rockers, I would not do O/R pushrods. You want things oiled up top and there isn't much of a difference. Lubrication is key.

I'd add on an oil pressure kit. Intense sells them.
Thought the L32 piston skirt area was stronger. Might aim for that.
You can not run stock heads with only a valve job. That cam requires a minimum retainer to valve seal clearance of .600", stock is much less.
Do not swap from stock coils down the road. MSD's are known for breaking down at high rpm and causing issues in a year or less. Stock are the best you can get.
I'd also see about a Gen V. Much cooler charge than a ported Gen 3.

Questioning your need for a S3X cam. You won't flow enough air through a stock head or a Gen 3 where I can see it being beneficial. I'd suggest either upgrading to ported heads or sticking to soemthing like a S1X and then you could use lower rate springs, stick with titanium retainers for light weight and save money.
 
Built 282 5-spd swap. :)

The heads will be ported, a good friend builds high performance engines and he is going to do the heads. He's good, just did the heads on my LQ9 for my 98 Trans Am.

We'll keep stock coils.
Will go with stock style pushrods.
Oil pressure kit we'll look into as well.
We'll look for some L32 pistons, I was wondering about that.
We already have the Gen 3, but we'll keep our eyes open for a Gen V.

I'm still trying to wrap my head around these engines. I've been a Pontiac V8 and LSx guy for so long now, it's a different beast all together.
 
And life is easier because there are two head options.

Stock.

ZZP aluminum.

Thats it.

Every other part usually follows the same concept.

Very limited choice in what you can go with.
 


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