Texas Speed TSP 228R Cam Kit +50HP + Trunnion Upgrade + PAC1219 Beehive Springs + Valve
- 228/228 duration at .050, .600/.600 lift
- 110 LSA camshaft profile
- 1997 to 2013 GM LS V8s, engine codes in specs
- PAC1219-style beehive springs, .625 in
- Trunnion upgrade kit converts stock rockers to roller bearing
- Est. 45 to 50+ rear wheel HP, 1,800 to 6,800 RPM range
- 3,200+ RPM stall converter recommended for automatics
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A cam, spring and trunnion kit for a wide range of GM LS V8s, aimed at an aggressive idle and a broad power range. Lifters and pushrods are not named, so budget for them separately.
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ASIN: B0H9JZX32JCategory: Camshafts
Overview
The lobe separation angle on this Texas Speed camshaft is what moves the powerband lower in the rev range and roughens the idle. The kit adds beehive valve springs, valve stem seals, a front timing cover gasket set and a rocker arm trunnion upgrade kit.
One order covers the camshaft and the parts most often swapped with it, which cuts down on sourcing for an LS build. The seller describes a broad powerband, but the contents list names no lifters, pushrods or head gaskets, and automatics are advised to pair it with a looser converter.
Who it's for
Daily driver Camaro and truck owners, plus LS swap builders, who want a loud idle and a broad powerband are the match for this kit.
Pros and cons
- Covers cathedral port and rectangle port families
- Trunnion upgrade included
- Beehive springs for valve control
- Valve stem seals and timing gasket included
- Lifters and pushrods not named in kit
- Stall converter advised for automatics
- Aggressive idle is not subtle
- Single cam grind, no alternatives offered
Performance notes
A larger duration and lift move more air at higher engine speeds, and the wider lobe separation angle shifts the powerband lower while making idle rougher. The beehive springs are chosen for stability at high rpm so the valves follow the lobes without floating. Automatic cars benefit from a looser converter so the engine reaches the range where this cam works.
Specifications
| Brand | ENGINE SUPPLY |
|---|---|
| Dimensions & fit | |
| Product dimensions | 24 x 14 x 4 inches |
| Item weight | 15 pounds |
| Capacity & performance | |
| Stated RPM range | 1,800 to 6,800 RPM |
| Included components | |
| Included | Camshaft, beehive springs, valve stem seals, front timing cover gasket set, rocker arm trunnion upgrade kit |
| Other details | |
| Engine fit | GM LS V8: LS1, LS2, LS6, LR4, LM7, L59, LM4, L33, LH6, LC9, LY5, LMG, LQ4, LQ9, L76, L92, L96 |
| Model years | 1997 to 2013 |
| Duration at .050 | 228/228 |
| Lobe separation angle | 110 |
| Valve lift | .600/.600 inch |
| Converter advice for automatics | 3,200+ RPM stall |
| Valve springs | PAC1219-style .625 inch beehive |
| Exterior | Machined |
Frequently asked questions
What LS engine sizes does the Texas Speed TSP 228R cover?
The title lists 4.8L, 5.3L, 5.7L, 6.0L and 6.2L Vortec LS V8s. The description names engines from the LS1 and LM7 to the LQ4, LQ9, L76, L92 and L96, for 1997 to 2013.
Does the TSP 228R kit include lifters or pushrods?
Neither is named. The contents listed are the camshaft, PAC1219-style beehive springs, valve stem seals, a front timing cover gasket set and the rocker arm trunnion upgrade kit.
Do I need a stall converter with the 228R cam?
The listing recommends a 3,200+ RPM stall converter for automatic applications. It does not give advice for manuals.
What does the trunnion upgrade in the 228R kit do?
Per the seller, it converts stock LS rocker arms into captured roller bearing rocker arms, removing the factory failure point.