5.3L LS Small Block Build - Modern Mouse, Part 7

Turbocharged Boost!

Richard Holdener May 9, 2012 0 Comment(s)
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Additional components included a pair of 45mm Hypergates and a single RacePort blow-off valve all from Turbo Smart. The exhaust system featured shorty truck headers from JBA connected to the turbos using short tubing sections designed to adapt the stock exhaust flanges to the T4 turbos. The Turbo Smart Hypergates were positioned inline on the adapter tubing, while the single RacePort blow off valve was welded to the single 3.5-inch aluminum inlet tube.

CXRacing also supplied the necessary 3-inch aluminum tubing, couplers and clamps to connect the turbos to the intercooler as well as the 3-inch stainless tubing, v-band flanges and clamps used to complete the exhaust. In addition to offering complete kits, CXRacing was a one-stop source for our do-it-yourself turbo kit. The final upgrade was to replace the 36-psi injectors with a set flowing 75 lbs per hour.

With Modern Mouse ready to rock, we first dialed in the air/fuel mixture at just seven psi before working our way up in power. Even at just over 7 psi, Modern Mouse produced nearly 750 hp. Eventually the boost was increased to nearly 13 psi (12.8 to be exact), where Modern Mouse pumped out 963 hp at 6,500 rpm and 868 lb-ft of torque at 5,000 rpm. Torque production exceeded 800 lb-ft from 4,650 rpm to 6,300 rpm, but never dipped below 700 lb-ft.

Being so close to 1,000 hp, it took all of our will power to stop from cranking up the boost. In the end, we decided to limit the boost to a reasonable level.

Sucp_1206_023_3l_ls_small_block_build_part_7 11/20

19 Modern Mouse-NA vs Twin CX Racing Turbos (12.8 psi) Though we ran Modern Mouse at lower boost levels, the final test resulted in peak power numbers of 963 hp and 868 lb-ft of torque at just under 13 (12.8) psi. That represented a gain of 448 hp and 361 lb-ft of torque over the normally aspirated combination.


L&R Automotive
Sante Fe Springs, CA 90670
Probe Racing
Torrance, CA 90505
Procomp Electronics
Ontario, CA 91761
CX Racing




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