Chevrolet Corvette Stingray C7 Forum - View Single Post

MBRP Tech · 12-16-2009, 01:53 PM

Here is the internals list...it was built to handle 22 lbs of boost...we are sticking with 14 lbs for now.

This is the list from EPP.

LS7 427 ci
Internal upgrades and custom cam from Exotic Performance Plus –
Diamond Pistons 11596
Compstar Connecting Rods
Clevite H series rod (CB663HN) and main bearing (CB2199HX) ARP main and head studs Total seal rings with an AP steel top ring
Comp Cam duration @ .050 is 236/246 on a 114 lobe separation
installed @ 113 intake centerline with .637/.650 lift Manley 5/16 one piece pushrods The heads were O-ringed at West Coast Cylinder Heads Valve springs are comp cams 26921kt

The engine is 428.69 CID. The bore is 4.130, and it has the stock LS-7 4" stroke crankshaft. The compression ratio is 9.37:1 The block was honed with a torque plate, and the crankshaft was computer balanced to
1/4 ounce/inch.

12-16-2009, 01:53 PM	#4
MBRP Tech Manufacture Drives: Camaro Join Date: May 2009 Location: Huntsville Posts: 124	Here is the internals list...it was built to handle 22 lbs of boost...we are sticking with 14 lbs for now. This is the list from EPP. LS7 427 ci Internal upgrades and custom cam from Exotic Performance Plus – Diamond Pistons 11596 Compstar Connecting Rods Clevite H series rod (CB663HN) and main bearing (CB2199HX) ARP main and head studs Total seal rings with an AP steel top ring Comp Cam duration @ .050 is 236/246 on a 114 lobe separation installed @ 113 intake centerline with .637/.650 lift Manley 5/16 one piece pushrods The heads were O-ringed at West Coast Cylinder Heads Valve springs are comp cams 26921kt The engine is 428.69 CID. The bore is 4.130, and it has the stock LS-7 4" stroke crankshaft. The compression ratio is 9.37:1 The block was honed with a torque plate, and the crankshaft was computer balanced to 1/4 ounce/inch. __________________ Jeff Carr Sales & Special Events Coordinator MBRP Inc. Performance Exhaust 1-888-636-7223 www.mbrp.com]