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Thunder Racing TR224/227 cam: specs, price & owner results

Spec	Value
Engine	Gen III/Gen IV LS
Style	HYDRAULIC ROLLER
Status	Discontinued

Parts to install it: cam bolts to match your cam gear (1-bolt or 3-bolt); 7.400 in. pushrods (hardened; 7.400 in. is stock length, so measure first); timing cover gaskets (the front cover comes off to change the cam); timing chain (replace it on a high-mileage engine or with a big cam). More: LS cam swap guide.

Thunder Racing is no longer in business; its published specs for this cam survive only in forum reposts, so we don't list them. Owner-reported results are below.

Tuning checklist

Tune: Aftermarket cams need idle, fuel, spark and torque-model changes.

From the cam maker's description and our cam tuning guide. Confirm with your tuner. What else does the tune need? →

What owners report with this cam

Owner-reported numbers — exploratory, not verified. Dynos, heads, supporting mods and tunes differ; use these as a rough range, not a promise.

6NA rear-wheel reports (the count the cam finder shows)

382median rear-wheel hp, NA (low-confidence reports excluded)

300–403range, same basis

9reports in total, incl. boosted, crank-hp and low-confidence (listed below)

Engine	Heads	HP	TQ	Measured at	Adder	Confidence
		560		Wheel	nitrous (150-shot wet plate)	High
6.0		407	406	Not stated	NA	High
	stock	403		Wheel	NA	Medium
	stock heads	398	385	Wheel	NA	High
		383		Wheel	NA	High
		381	366	Wheel	NA	High
	Stage 2.5 PRC 243	378		Wheel	NA	Medium
lr4 4.8		300		Wheel	NA	Medium
		277		Wheel	NA	Low

Installing it? Follow our LS cam swap guide (Gen III and Gen IV, any chassis), with every torque spec you need. In a 1998–2002 Camaro or Firebird, the F-body cam and valve spring swap goes bolt by bolt.

← All cams in the cam finder

Build a turn-on tune sheet for this cam → Idle and spark starting values, from real tunes. Always finish on a dyno.

New Already running this cam? Send us your tune and we'll compare it with similar builds and tunes we've reviewed. Get a Tune Report → ~~$19~~, free while we launch.

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