The session began with a series...
The session began with a series of low-rpm break-in runs, to ensure that the engine was operating properly. After a cool-down session, the oil and filter were changed and the 418-cube stroker was finally unleashed. In addition to working on various computer tunes, TSP was able to validate that its newly released 100mm billet MAF and sensor-adapter harness could easily be tuned to match the engine's changing airflow requirements.
The TSP short-block retails for $4,095 and is offered in both 418 and 427ci versions. Long-block versions are available for $7,399, while complete engines-including intake, fuel-system components, and headers-come in at $9,607.74. For enthusiasts looking to make LS7-killing power at a budget price, TSP's offerings look to be right on target.
Test No. 1 (Baseline)-Stock L92/LS3 heads; PTM 92mm throttle body; SLP 85mm MAF; stock L76/L92 intake; Comp Cams hydraulic roller camshaft with 242/248-deg duration at 0.050, 0.612/0.615-in lift, 114-deg LSA
Test No. 2-Replaced stock L92/LS3 heads with PRC ported L92/LS3 heads
The most aggressive of the...
The most aggressive of the three combinations cranked out a rousing 641.18 hp and 578.54 lb-ft or torque. Want more? TSP says the package is rated to take a 200-horse shot of nitrous, and lower-compression pistons can help push a forced-induction combo past the 1,000rwhp mark.
Test No. 3-Installed Comp Cams hydraulic roller camshaft with 251/259-deg duration at 0.050, 0.660/0.603-in lift, 111-deg LSA; installed TSP 100mm MAF
Notes: All testing was completed on Sunset Racecraft's DTS model 4000G engine dyno. HP Tuners VCM Suite was used to tune the computer. The timing was locked at 28 degrees, and the knock sensors were removed for testing. VP 101-octane unleaded was utilized in the cell, though TSP says 93-octane would work just as well.