LS400 Supercharger Project
Hmm, well I'm not quite sure how your supercharger ends up plumbed with relation to the throttle and such, but at least in a centrifugal supercharger or turbocharger application, a boost leak indicates a leak in the charge pipes from after the compressor outlet all the way up to the throttle body, and is independent of a vacuum leak.
Thread Starter
Driver
Joined: Mar 2004
Posts: 117
Likes: 0
From: Texas
I am begining to drive my car daily now, but not boosting due to a lean Air/fuel ratio. I am confused about whats going on. I plan on rebuilding the M90 and ran my gas talk dry and make sure there is no water in there.
Many people have made this work on a stock setup, so it should have no problems. I have my fuel pressure regulator maxed out and I am still lean. Everything works perfectly durring vacuum, but with boost it really struggles and misfires. Injectors tested OK 14.2 OHMs. O2 sensors maybe???
Many people have made this work on a stock setup, so it should have no problems. I have my fuel pressure regulator maxed out and I am still lean. Everything works perfectly durring vacuum, but with boost it really struggles and misfires. Injectors tested OK 14.2 OHMs. O2 sensors maybe???
Driver
Joined: Jun 2007
Posts: 136
Likes: 1
From: PA
^ yep.. you are going to need something to manage the fuel supply.
You'll also maybe need something to adjust timing. You are forcing more air into the motor. Your timing will most likely need reduced across the board, esp. up top.
Best of Luck! Good project you are posting up!
You'll also maybe need something to adjust timing. You are forcing more air into the motor. Your timing will most likely need reduced across the board, esp. up top.
Best of Luck! Good project you are posting up!
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Thread Starter
Driver
Joined: Mar 2004
Posts: 117
Likes: 0
From: Texas
I am having a problem with running lean before the onset of boost. To solve this I am going to install a cartech fuel managing unit that should get me running rich before the onset of boost.
Once the boost is increased to 10 lbs. is when Piggybacks will be needed to retard timing a bit.
I will have more for you guys when after the install.
Once the boost is increased to 10 lbs. is when Piggybacks will be needed to retard timing a bit.
I will have more for you guys when after the install.
You have already reset the ECU, right?
Please keep us posted--I hope Corky's FMU can help...
Thread Starter
Driver
Joined: Mar 2004
Posts: 117
Likes: 0
From: Texas
Holy Crap!!!!! I got the LS boosting now!!!!
I can spin up the tires on dry pavment in 100 degree heat with ease. Acceleration is wicked and will only get better!!!
Only problem is that during a few take off attempts the check engine light would flash and the car would buck and stop. The code I read was 41 TPS. I will need to readjust it again because I messed with it after the intial install.
I will be taking everything off to rebuild the blower and install some teflon coated rotors off a GTP pontiac. It will add about 1.5 - 2 lbs. of boost, so I am not sure about this mod. It will give me higher boost but with cooler temps I believe, so hopefully it does not detonate.
What do you think?
I can spin up the tires on dry pavment in 100 degree heat with ease. Acceleration is wicked and will only get better!!!
Only problem is that during a few take off attempts the check engine light would flash and the car would buck and stop. The code I read was 41 TPS. I will need to readjust it again because I messed with it after the intial install.
I will be taking everything off to rebuild the blower and install some teflon coated rotors off a GTP pontiac. It will add about 1.5 - 2 lbs. of boost, so I am not sure about this mod. It will give me higher boost but with cooler temps I believe, so hopefully it does not detonate.
What do you think?
Thread Starter
Driver
Joined: Mar 2004
Posts: 117
Likes: 0
From: Texas
I added a BEGI fuel managing unit. It is what I needed to throw in more gas during boost. I am sure that I should change/upgrade the fuel pump to keep the pressure steady.
What pumps would be the best??? Walbro's are the best option from what I have heard, but I would hate to have a whiney pump sound in my cabin.
What pumps would be the best??? Walbro's are the best option from what I have heard, but I would hate to have a whiney pump sound in my cabin.
I added a BEGI fuel managing unit. It is what I needed to throw in more gas during boost. I am sure that I should change/upgrade the fuel pump to keep the pressure steady.
What pumps would be the best??? Walbro's are the best option from what I have heard, but I would hate to have a whiney pump sound in my cabin.
What pumps would be the best??? Walbro's are the best option from what I have heard, but I would hate to have a whiney pump sound in my cabin.
