kalildude

iTrader: (19)

i have an procharged 99 ls1 and im swapping it with a 03 lq9 now i heard that the bracket wont bolt up to the iron block its missing a hole what did you guys do about that or is that even true?

9sectruck

iTrader: (9)

There is a alternator bolt hole missing, that you need to drill and tap, that I’m pretty sure it is used on the blower bracket

menchaca

iTrader: (1)

The iron blocks are missing 2 of the 3 alternator bolt holes.

DarkFox118

iTrader: (7)

this.

One of the holes is not obtainable, the other is with a drill and tap. If you look at the front of your Lq9, you will probably note a metal tab just below the head on the block on the driver side front of the motor. This is where one of the holes goes. (this is the one you can get back..)

the other hole for the Ls1 is right about where one of the cylinders is on the LQ. I guess no room on this casting for the hole due to larger bore perhaps? either way.. can't get that one.

I've heard there are people running an procharger on LQ blocks all over the place here. I'm sure bob @ brutespeed can help you out though if no one else has any insight as to the specifics.

Bob@BruteSpeed

iTrader: (16)

You're correct, one of the holes cannot be drilled and tapped. I've never had this one missing hole be a problem for anyone, we ran my Camaro that way without any problems at approx 1000 hp. Bob

blue00ZZleeper

iTrader: (5)

I made a plate to bolt the bracket up to...its somewhere in my build thread.

kalildude

iTrader: (19)

ok thanks guys keep it coming about way to adapt to thi problem

DarkFox118

iTrader: (7)

It'd be nice if someone could show us how they mount, might help explain why this is/isn't a problem.

You can mount an alternator in that spot no problem, but I think you still need to drill that 2nd hole to do it.

kalildude

iTrader: (19)

or if someone could make the same bracket and possible sell it that would help

blue00ZZleeper

iTrader: (5)

You need to atleast drill and tap the bung under the head. I made a plate to go into the recessed area and welded it in, giving me the 3rd mounting point. I have a build thread with pictures in it.

kalildude

iTrader: (19)

actually if you could anyone that has done an lq9 swap from a ls1 in thier f-bodys i could use some guidance please call me at 5208917632

SUPERMAN_00TA

iTrader: (25)

I only used the ones That I could get to and its fine..... or you could just tap the tab thats below the head....

blue00ZZleeper

iTrader: (5)

I would but I'm in Afghan. Look up my build thread when I did my motor swap. Lots of pics and info!

kalildude

iTrader: (19)

i looked at it but im confused on why your procharger is pointing the way it is, does it have to pointing that way

blue00ZZleeper

iTrader: (5)

The headunit only bolts up one way. Then, depending on your intercooler and piping it may be different. Mine sits like that and has a 90* bend going into the intercooler. The clocking of the volute doesn't matter....it's dependent on your setup. There's 5/16ths allen head cap screws that snug the volute onto the head unit....loosen them and you can spin it in almost any direction you need.