Thread: FRS 4.8 LS swap
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Old 07-17-2021, 04:02 AM   #176
kurty85
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Join Date: Jun 2017
Drives: 2014 FRS LS Swap
Location: Talofofo Guam
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Finally got the car going and on the road! I got it inspected yesterday and registered. The brake bleeding was a miserable pain. I finally got as much air out as I could by pressure bleeding with a master cylinder adapter and pressing the pedal. The brakes are significantly better but could use another professional bleed when I get back to the states. I am moving to Norfolk in September due to PCS orders (Navy) and shipping the car there. I had issues with white smoke from the exhaust and determined that the turbos were being over oiled. They are journal-bearing turbos bought from real st performance years ago. I used -4an lines with no restrictor. Rather than troubleshoot and rip everything apart, I took off the oil supply lines to each turbo and saw the center sections were filled to the top with oil and not draining. As soon as I spun the cold side wheel, the housings began to drain which made me think the volume of oil is too much. I have 43 psi at idle of oil pressure and over 60 psi at 35 mph. I thought about it and deemed I could tap the fittings going into the turbo and install a set screw. I drilled a 1/16 (0.0625) hole in the set screw and put everything back together. Took it for a test drive and no smoke! And it only cost me 19 dollars for everything. This is very close to the size recommended for some journal-bearing turbos of 0.065. The last thing to do is finish n/a tuning and boost. Think I want to take the car to VA Speed for a tune when I get there as they are the best LS tuners I have worked with. I also see myself switching out this engine and building a LS3/4.8 crank build eventually because I want to see 8k rpm. I feel like it would suit the character of the car.
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Last edited by kurty85; 07-17-2021 at 04:16 AM.
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