So I have removed the old 374cu SBC to make room for the turbo LQ4. The vehicle is a '87 GN that is still a stock looking car (full interior and power everything) but is 8.50 cert. I'm guessing the car will be 3950 with driver. I will be reusing the turbo 400 and 9" since they are already built. Going to us HP tuners on factory drive by cable PCM.
Specs on engine:
- Complete drop out -- 2001 LQ4 with 32,xxx miles.
- Long block is completely stock except:
-stock rings regapped to .030"
-80lb Siemens Deka Injectors EV1 (PN: FI114961)
-ARP2000 rod bolts (PN: arp-234-6301)
-ARP Pro head studs (PN: arp-234-4110)
-LS9 head gaskets (PN: 12622033)
-LS9 MAP Sensor (PN: 12592525)
-yellow LS6 valve springs (PN: 12499224)
-Adapter Flexplate - LS to TH350/400 (PN: 12621399)
-Flexplate bolts (PN: 12563533)
-Flexplate Spacer (PN: 12563532)
-Edelbrock fuel rail kit (PN 3638)
-PTE PT4788 T6 0.96ar
-5" Aluminum Downpipe
-Large Water to Air Intercooler (front mount)
-3" coldside pipes
-JGS 60mm WG
-JGS 50mm BOV
Going to try to use factory truck manifolds and do some type of crossover to the Passenger side, kind of like the factory hotside setup would have been in the GN 3.8L engine. Hope to place the turbo in a similar to stock GN arrangement also. We will see how that works out when I get the engine in the car and check for clearances.
The built N/A 374 ran 11.2 @ 122mph. I hope this "stock" LQ4 with 15 or so PSI isn't slower.
EDIT: it was faster at only 6psi it ran 11.10.
Guess we will see, many pics to come of the build.