I have a Precision P trim 70 turbo with slow spool-up. Looking for a better street turbo. Don't really go to track but once a year. Yesterday dyno #s showed 427 RWHP and 457 RWT at 25 lbs. Seems like it should be higher. I need some tuning. I purchased car in August 2009 and the previous owner only had it for a short period and did not add much to it or know much about the car. It definately has Stock bottom end and I have no current plans of upgrading bottom end. The following list is what I know of for sure. So which turbo would give me better immediate response while maximizing the modifications of the car? I added a few pictures of my work over the winter so you can see what I am working with. Sorry for the long post but wanted to provide you guys with pertinent info so that you can provide me with good recommendations.
· Mild ported stock heads, decked (previously was O-ringed), valve job with new Manley big valves 177/150
· Mild ported intake with EGR block-off plate
· Flat Tappet stock Cam (not sure but believe it is stock)
· Ported Kenne Bell 70MM Throttlebody and Plenum
· RJC power plate
· MAF Translator
· LS1 3.5 inch MAF
· 3.5 inch MAF pipe - polished aluminum
· Innovate LC-1 Air/fuel gauge
· RJC “Bullet Proof” Head Gaskets
· RJC oversized oil pan
· 65lb Precision injectors
· 70 mm P-Trim Precision turbo
· Quad Air Volt Booster
· 10MM Magnecor spark plug wires with NGK UR5 gapped at 32
· Big-Mouth Cold air kit with K&N filter
· IAC Angle Boss
· GN1 Super Extreme Front Mount Intercooler
· Hot wired Walbro 340 fuel pump (that's what I was told but not sure)
· Precision Turbo Saver
· ATR headers
· 3” Stainless Steel downpipe with bung for Wide Band sensor
· 2.5" Stainless Steel exhaust, test pipe with Cutout and ATR Pitbull Mufflers
· Boost Commander - Bstc in-car boost controller w/ dual stock solenoids
· Razor’s Alky Control methanol injection
· TT 5.6 Alky Performance chip
· Liquid filled adjustable fuel pressure regulator & gauge
· Scanmaster 2.1
· Upgraded 200r4 Trans - not sure of stall but was told 3500 (probably more like 3000 - 3200)
· Art Carr Deep Trans pan
· 3.42 posi rear end
· Mild ported stock heads, decked (previously was O-ringed), valve job with new Manley big valves 177/150
· Mild ported intake with EGR block-off plate
· Flat Tappet stock Cam (not sure but believe it is stock)
· Ported Kenne Bell 70MM Throttlebody and Plenum
· RJC power plate
· MAF Translator
· LS1 3.5 inch MAF
· 3.5 inch MAF pipe - polished aluminum
· Innovate LC-1 Air/fuel gauge
· RJC “Bullet Proof” Head Gaskets
· RJC oversized oil pan
· 65lb Precision injectors
· 70 mm P-Trim Precision turbo
· Quad Air Volt Booster
· 10MM Magnecor spark plug wires with NGK UR5 gapped at 32
· Big-Mouth Cold air kit with K&N filter
· IAC Angle Boss
· GN1 Super Extreme Front Mount Intercooler
· Hot wired Walbro 340 fuel pump (that's what I was told but not sure)
· Precision Turbo Saver
· ATR headers
· 3” Stainless Steel downpipe with bung for Wide Band sensor
· 2.5" Stainless Steel exhaust, test pipe with Cutout and ATR Pitbull Mufflers
· Boost Commander - Bstc in-car boost controller w/ dual stock solenoids
· Razor’s Alky Control methanol injection
· TT 5.6 Alky Performance chip
· Liquid filled adjustable fuel pressure regulator & gauge
· Scanmaster 2.1
· Upgraded 200r4 Trans - not sure of stall but was told 3500 (probably more like 3000 - 3200)
· Art Carr Deep Trans pan
· 3.42 posi rear end