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
​
Retainers:​1.250
​

Fel-Pro Intake Gaskets Button head Stainless Steel ​Intake Bolts
Fuel Management: Electromotive tec gt fully lap top programmable along with aeromotive fuel pump and filters
Igniton System: Electromotive 60 tooth crank trigger ignition with ignition coils
Autolite 3924 spark plugs
• Autocrafters oil pan
• Fel-Pro Oil Pan Gasket
• Gm High Volume Oil
• Oil Filter Adapter w/ Oil Filter
20W50 Racing Oil
. Valve Covers w/ Stainless Steel Valve Cover Bolts
• Professionally Blueprinted