What size throttle body?

[Mathi]

Hi guys,

What size would you guys recommend for my LS engine?
I'm looking for a single throttle intake.
The engine makes 550 hp on the wheels and 690hp on the crankshaft.
Is 102 mm good? I want to have a smooth driver and nothing too serious.

The other details of my engine:
Nelson Racing 474 Injected LSX Hot Rod Series

Engine Block:​Gm Lsx engine block 9.7 deck height
Bore/Stroke:​474c.i. 4.165”/4.350”
Crank Shaft:​Callies 4.250 magnum 4340 Forged Steel Crank Shaft
Connecting Rods:​ 4340 forged connecting rods
Bearings:​Clevite 77 H Main and Rod Bearings
Cam Bearings:​Durabond HP Cam Bearings
Rear Seal:​Fel-Pro Viton Rear Seal
Balanced:​SFI Internal Balancing dynamic within 1 gram
Block Work for
Crank:​Block Fully Clearenced for Stroker Crank
Pistons:​Manley 10 to 1 Forged Pistons
Piston Rings:​Manley Pro Rings
Wrist Pins:​ Je Steel Wrist Pins
Camshaft:​Custom Nre Hyd Roller Cam

Lifters:​Gm racing hydraulic roller Lifters
Pushrods:​Smith Bros pushrods
Timing Chain:​Gm timing set with damper
Timing Chain
Cover:​Gm front cover
Timing Chain
Cover Gasket:​Gm Timing Chain Cover Gasket
Cylinder Heads:​Lsx cyl heads with 6 bolt pattern
Main/Head Bolts:​ARP Head Bolts gm Main Bolts
Head Gaskets:​Felpro
Valves: Stainless Steel Valves 2.160” Intake, inconel 1.6” Exhaust ” One Piece
Valve Locks:​ Machined Steel Valve Locks
Seals:​​Viton Valve Seals
Valve Springs:​190 seat 380 open Double Valve Springs

[jwcarguy]

contact Nelson Racing Engines, they would be best, since it is their engine

[gnx7]

A ported MSD Atomic LS7 intake with Holley 105mm TB would do the trick!

That intake requires stock style LS3/LS7 injector height or a spacer/billet rails.

I assume you have LS7 ports; however with 2.16" valves maybe you have LS3.

[Mathi]

I have LS3 design heads