Lsx swap?

[McssGmachine]

What do I need to control this thing? I already have a old school small block with an old F.A.S.T system. Can I use that computer? What do I need for the ignition? The motor is going to make upwards of 575hp. What kind of fuel system do I need to run?

Thanks

[ahowudoin]

Lots of info at ls1tech.com goto the conversion section

[nitrorocket]

I would recommend the stock ls1 computer. Has way more options and is much better then a F.A.S.T. system.

[olds87]

What kind of LSx engine you are think of?

[McssGmachine]

Originally Posted by olds87

What kind of LSx engine you are think of?

I want to go with a 402. I'm not sure who I'm going with to build it.

[McssGmachine]

Originally Posted by nitrorocket

I would recommend the stock ls1 computer. Has way more options and is much better then a F.A.S.T. system.

What options does the stock ECU provide over the F.A.S.T system?

[nitrorocket]

Originally Posted by McssGmachine

What options does the stock ECU provide over the F.A.S.T system?

Boy, where to start!

Features over what F.A.S.T. does:

-Full 4L80, 4L60 transmission control
-Simultanious Closed/open loop control
-Auto tuning ability
-Torque managment ability
-Speedometer reading input
-Boost and nitrous control without having to upgrade
-Has much more advanced engine malfunction readings like individual cylinder misfires, knock retard conrols to eliminate engine damage from bad fuel, etc.
- Multiple fan on off control and fan after run features.

I cannot think of the rest but there are a ton more controls then you have with a F.A.S.T system. Bigstuff 3 has a lot of nice features though.

[camcojb]

Originally Posted by nitrorocket

Boy, where to start!

Features over what F.A.S.T. does:

-Full 4L80, 4L60 transmission control
-Simultanious Closed/open loop control
-Auto tuning ability
-Torque managment ability
-Speedometer reading input
-Boost and nitrous control without having to upgrade
-Has much more advanced engine malfunction readings like individual cylinder misfires, knock retard conrols to eliminate engine damage from bad fuel, etc.
- Multiple fan on off control and fan after run features.

I cannot think of the rest but there are a ton more controls then you have with a F.A.S.T system. Bigstuff 3 has a lot of nice features though.

That would depend on the stock ECU I guess. MY GTO computer didn't have many of those features; no nitrous or boost control, no trans control (had a separate computer for that), and no fan controls for off/on other than how fast it spins.... you could not change when it came on.

This was an LS2 and I know the LS1 does have fan controls. Never seen a factory ecu have a boost controller or nitrous setting though. The auto tuning comes from the individual tuning system you use to tune with (additional $500-$700 you need to spend so you can tune the stock computer).

One other consideration I had was full throttle closed loop operation with a boosted engine. The factory will not do that and FAST and Big Stuff 3 (as well as some others) will. Nice safety feature in my opinion as it can add fuel under WOT if needed to get to your target A/F (assuming your fuel mapping is within 25% of where it's supposed to be).

By the way, the FAST and BigStuff 3 have nitrous controllers; the BS3 also has an optional boost controller and trans controller.

Jody