turbo setup(so far) andy suggestions
Thread Starter
Staging Lane
Joined: Jun 2007
Posts: 82
Likes: 1
From: dayton/troy ohio
turbo setup(so far) andy suggestions ill post pics tomorrow comp is having a brain fart. so far i have a gt 40 turbo, 38mm waste gate, manifold log i built, ls6 cam, 8.1l marine injectors, scorpion fuel rails, intercooler and piping, ls6 springs. built 4l60e. im trying to track down a 2 bar map from the cobalt ss. i know i need a bov. what about fuel pump? 255lph? i have a msd boost a pump, do i need it? i want to run some 5-9 psi then later maybe switch things out and go for more. high flow cats or no cats? yes i have done searches. tired of reading the hundreds of forced induction entries. comment tips sugestions
formerly turbo4.8 (2014-06-25)
iTrader: (10)
Joined: Oct 2008
Posts: 366
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From: FT Bragg, NC
upgrade your springs buddy... even tho you have a relatively tame cam, use the .660 lift springs with some ti retainers and hardened pushrods. the pushrods are a well known weak link in these motors and also there will be far more pressure on ur springs with the boost than the ls6'rs can handle. the guys on ls1truck.com all haave turbos and can answer any of these questions in seconds for ya... good luck
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You don't need to run speed density in order to shut off the stock O2's. You can run open loop with a MAF. Just have to make sure that the open loop fueling table is setup correctly. If you turn off the O2's without fixing the OL table, your car will run PIG rich.
Staging Lane
Joined: Aug 2006
Posts: 94
Likes: 0
From: clemson / charleston SC
I would think that you might need a larger or a second wastegate. The 38mm might be a little small for your application though I could be wrong... If you stay with the 38 for now I suggest you set the boost to about 5psi and run the car and see if the wastegate can keep up to check for Boost creep.
Good luck,
-John
Good luck,
-John
Thread Starter
Staging Lane
Joined: Jun 2007
Posts: 82
Likes: 1
From: dayton/troy ohio
i think its a 38mm the turbo also has an intyernal waste gate. but i dont know what its set at ill have to run the truck to findout then turn it up or turn it down the guy i bought the turbo from said he had it set at7 psi but i want to check it for myself