atomic 6

You always set the vac/boost ref. fuel pressure regulators with the vac/boost line disconnected.

58 lbs base pressure (no line)

58 lbs - vac@idle = idle pressures

58 lbs + boost = boost ref. pressures

MillsMotorvation

So I have it right? 58psi line off?

Sarg

iTrader: (6)

You must have some serious vacuum if it drops 10 psi! I usually set mine with the vacuum unhooked so that at zero it reads whatever I want as my base fuel pressure.

MillsMotorvation

18lbs of vacum. I just want to make sure Im doing it right, dont want this turbo to kill the engine for my stupidity. On my 87Grandnational we run 43-45 line off car running, and when you put the line on it drops to 38 or so. Tuner said 58psi with car off, so Im making sure I got it right!

atomic 6

probably, yes, you have it right.

It depends on you fuel pump, if your fuel pump can deliver the volume you need at the base pressure + your max boost, then yes you have it right.

But it you are trying to run alot of boost on an A1000(as an example) then the 58 lbs base pressure is too high.

MillsMotorvation

No its a Walboro.

lsxmalibu

iTrader: (50)

Stock rail FPR here..

a4ls2goat

I just bought this Turbo. Should be here next week. Go a be using it on my ls2 gto at about 10-12psi.

Nice times,

WheelsUp84z

iTrader: (14)

Thats how I have mine setup, set the base with no reference attached, and if its a 1:1 FPR it will drop down when in vacuum and bump up in boost. However If i understand it correctly, from idle to full boost the system will remain the same PSI as its a differential pressure gain/loss value and not the actualy fuel pressure itself. For example. You set your base pressure to 50 psi, when you have 10 psi of boost, you are forcing the pressure back out of the injector essentially making them flow at 40 psi. The boost referencing will add an additional 10 psi of pressure to compensate for that. Same thing with vacuum, since the engine is sucking X amount of psi in vacuum, less pressure is needed from the rails to flow the pre determined fuel psi.

MillsMotorvation

Ok, thats how it works on my Grandnational! Any updates lsxmalibu?

texada

iTrader: (3)

Just curious after purchasing the turbo, how much will the other parts to make a complete kit cost?

lsxmalibu

iTrader: (50)

55 for a wastegate, 130 for the cold side, 100 for hotside piping. tune, fuel pump...its really not too bad

lsxmalibu

iTrader: (50)

nope, motor is apart, getting new ls9 cam and ls7 lifters.

MillsMotorvation

Ok thats great, how much bigger is the LS9 cam compared to the LS6, and the car will need to be retuned?

2TR

02+ ls6 cam:
204/218 .551/.547 117 LSA

ls9 cam:
211/230 .558/.552 122.5 LSA

Re-Tune: Yes.

Check THIS (below) out!

The 2009-2010 LS9 ZR1 camshaft is a perfect choice for LS supercharged or turbocharged engines. The LS9 camshaft is 211/230 @.050 valve lift and .558/.552 lift with 1.7 rockers and a 122.5 centerline.

Before the LS9 was introduced LPE used the GT7 camshaft that John Lingenfelter designed in 2001 to be the perfect camshaft for boosted LSx applications. The GT7 was 208/230 @.050 valve lift and .554/.546 and 121 center line this camshaft produced excellent power and still had great street driveablity. In 2009 GM introduced the LS9 in the C6 ZR1 supercharged Corvette engine. After comparing specifications on the camshaft and finding out how economical this is due to it being mass produced Lingenfelter discontinued the GT7 and started using the LS9 in supercharged or turbocharged applications.

The LS9 camshaft is a 3 bolt design and will use the Lingenfelter 3 bolt cam conversion kit if you are installing it in a single bolt application like the 2007 – 2010 LS2 or LS3. If you are installing it in an earlier LS1 or LS6 engine with the cam sensor at the back of the engine you will need a 2005 LS2 front cover, 2005 1x cam sprocket, camshaft extension harness, 2005 LS2 chain dampner.

If you are installing this in a 2010 Camaro L99 engine you also will need to replace L99 lifters with LS3 lifters and lifter guides. Replace L99 front cover with a LS3 front cover. While the heads are off you may also want to replace the L99 valves with the lighter 2.160" hollow stem LS3 intake valves, 1.59" heavy duty Inconnel exhaust valves.

MillsMotorvation

Thats great info there,thanks! I did a trick with my LS6 cam to make it a little bigger, it seems to be working. That seems like a good bit of work to get that cam to work in my engine. Thanks for all the great info, and always replying.

lsxmalibu

iTrader: (50)

plus the ls9 cam is only 120 bucks new ! A used z06 cam goes for around 100

Transam Rocket

hi just wanted your quick advise? would the gt45 turbo be enough for my car to run 9s in 1/4
my set up
stock 02 5.3
stock 706 heads
918 comp springs
02 ls6 cam
victor jr manifold
80lbs injecters
intercooler
meth injection
e85

02 camaro 3400lbs
4l80e 3600-3800 stall 2 step 3.27 gears 295 55 15

05TurboCGM

This thread is awesome. Good stuff.

lsxmalibu

iTrader: (50)

should be doable...you can always turn up the boost!