LT1 Boost Customer dynos car

**RealQuick** · 10-29-2011, 08:28 AM

495hp 491ft/lbs @ 7psi thru an AUTO (A/F-11.8-12.0, timing only @ 17 degrees)

600rwhp/605rwtq @ 10psi thru an AUTO (A/F-?, timing @ 21 degrees)

LT1Boost Header Kit (stainless)
1.75" headers
3.5" DP
TC78 .96 A/r
40mm JGS Wastegate
60mm JGS BOV
4" A2A IC
3" cold side

355ci
230cc Brodix LT1 Cylinder Heads w/62cc Chambers
Fully CNC ported intake/exhaust/combustion chambers
Cometic "MLS" Head Gaskets
ARP Undercut Head and Main Studs
CP Pistons & Pins - 24cc Dish (Approx. 9.0:1 comp ratio with 62cc heads and .040 gasket)
Total Seal Piston Rings
Manley 5.700" H-Beam Connecting Rods
Callies Billet Steel Splayed 4 Bolt Main Bearing Caps
Callies "Stealth" 4340 3.75" Stroke Crankshaft - Internally Balanced
Fluidampr 7.5 o.d. internal balance 740101
Cloyes Double Roller Timing Chain
Canton Road Race Oil Pan, Melling High Volume (10%) Pump Mel-10552, and Canton Pickup
Trickflow 7.3" Chromemoly One Piece Pushrods TFS-21407300

224/224 .577/.582 114 LSA
monoblade throttle body with the LT1 style IAC and TPS sensors. I have a 3 bar MAP sensor.
adjustable fuel pressure regulator set to about 42 psi at idle. Twin in-tank walbro 255lph fuel pumps, one set to come on at about 5-6 psi. Fuel injectors are Siemen Deka 80lb high impedance injectors.
Ignition is a LSI PCM with D585 truck coils (lower dwell time) and MSD wires with iridium spark plugs gapped at .031"
Rockers are crower 1.65.
Springs are Comp 26094-16. Seat load: 178lbs @1.900''_Open load: 459lbs @1.275_Rate: 449lbs/in
I'm using LS7 lifter with about .00416" preload.
Fans are Flex Lite 410's.
Tranny is a built 4L60E with a 2800 stall.
Rear end is a 12 bolt with 4.11 gears.
Compression ratio should be around 9.2:1.

***Fastbird*** · 10-29-2011, 10:41 AM

Awesome! Those are great 10 psi results!

**RealQuick** · 10-30-2011, 06:01 PM

Cam is a little small, but I suggested that he get the 1.15A/r turbine housing swapped before changing out the cam (make sure the .96 a/r isnt choking those heads).

looks like he had boost creeping up to 14psi right when he made peak power, but the powerband was already done at that point.