Texas Speed
NSR Lopey Idle Camshaft - 5.7L
SKU: TSP-HEMI-NSR
View on Texas Speed website+20
Horsepower
+18
Torque (ft-lbs)
What You'll Need
Advanced DIY or professional install. No valve spring swap needed (that's the whole point). Does require cam phaser lock-out, new lifters, and a custom tune. Headers and intake recommended.
Enthusiast builds balancing power and reliability
Compatible Vehicles
Price Comparison
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Why Install This?
Benefits
- Noticeable power improvement you'll feel in daily driving and pulls
Things to Know
- Professional installation recommended — requires specialty tools or expertise
What Does This Do?
The 'NSR' stands for 'No Springs Required' — this cam is designed to work with the factory valve springs, which dramatically simplifies the install and reduces cost. Most aftermarket cams require upgraded springs ($400-600 + labor), but this one works with what's already in your engine. Benefits: 15-25 HP gain with supporting mods, the lopey idle enthusiasts love, simplified installation (no need to remove heads for spring swap), and significantly lower total build cost than a traditional cam swap. Texas Speed is highly respected in the HEMI tuning community. Trade-offs: the 'no springs required' compromise means lower lift than comparable cams that do use upgraded springs — this means less peak power potential. The cam is designed for the 5.7L specifically (6.4L owners should look at the BTR cams). You still need a VVT limiter, non-MDS lifters (auto trans), and a custom tune. Even though it's 'no springs required,' the total cost with supporting parts and tune is still $1,500-2,000. This is the budget-friendly entry into cam swaps — perfect for a 5.7L owner who wants the sound and feel without the full-build price tag.
Required Supporting Parts
This camshaft requires additional parts for safe installation. Installing without these can cause serious engine damage.
Aftermarket camshafts REQUIRE upgraded valve springs and non-MDS lifters. Stock valve springs will cause valve float (valves bounce open at high RPM), leading to catastrophic engine damage. Non-MDS lifters are required on automatic transmission HEMIs because the factory MDS lifters are incompatible with aftermarket cam profiles.
VVT limiter and MDS delete are REQUIRED with aftermarket camshafts on 2009+ HEMIs. The VVT cam phaser will cause erratic timing with an aftermarket cam, and MDS oil passages must be sealed after removing MDS lifters. Without these, expect oil pressure loss and engine damage.
A custom ECU tune is REQUIRED with any aftermarket camshaft. The factory tune's fuel maps, timing tables, and idle control are calibrated for the stock cam — an aftermarket cam changes everything. The engine will not idle properly, will run rich or lean, and will not make optimal power without a tune.
Hardened pushrods are strongly recommended with aftermarket camshafts. Stock pushrods can flex under aggressive cam profiles, causing inconsistent valve timing. Most cam manufacturers recommend chromoly pushrods as part of a cam package.
Tune Required
This part requires an ECU tune to function correctly. Without a tune, the engine computer won't adjust for the new part, potentially causing poor performance, check engine lights, or engine damage.
Technical Details
No Springs Required camshaft for 5.7L HEMI. Lopey idle with strong mid-range gains. Works with stock valve springs making install much simpler.
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