nakedpants

Hi,

I need to convert my L92 to car accessories and LS3 intake but I want to keep the vvt.

I heard that the only water pump I can use is the L99 one as it will clear the vvt cover. If I want to use a Camaro or Corvette water pump I need to use spacers. Is this correct?

If I use the L99 water pump do I also need to use a L99 harmonic balancer, the L99 power steering pump and the L99 alternator? Or could I use an LS1, LS2 or LS3 F-Body harmonic balancer, power steering pump and alternator?

I assume that an LS1/LS2/LS3 corvette harmonic balancer, alternator and power steering pump would not fit at all with the L99 water pump? But they would fit if I would use a corvette LS1/LS2/LS3 water pump with spacers?

Furthermore is it correct that I can not mix corvette and f-body front end accessories? It has to be all either from the F-body or Corvette?

Are LS1/LS2/LS3 accessories all interchangeable (within the same chassis (f-body or corvette))? Lets say an LS1 power steering pump, LS2 alternator, LS3 water pump and LS3 harmonic balancer, all from the F-Body? Would they fit together? Or would I need all the accessories from one type of engine (eg. everything from the F-Body LS3)?

67Skylark

You can find answers and lots of pictures in the conversion & Hybrids forum. There are three basic setups, corvette shortest (meaning the drive belt is the close to the block) next setup (f-body and others) is 3/4" out from the corvette, then the truck/vvt engines 1.5 inches out from the corvette.
The L99 has VVT so it would have the same spacing as your truck engine crank pulley. no spacers required.
The bracket that holds your accessories will need to be spaced out to line up your pulleys, meaning if you use the corvette accessories your would need to space the bracket off the head 1.5 inches, any others would need 3/4 spacer.
I have an 2009 LY6 6.0 VVT engine, I used a water pump and intake from 2010 Camaro W/Auto trans. I used the corvette C5/6 alternator/power steering bracket using 1.5" homemade spacer.
The closer you keep it to a standard GM set up the easier the tuning will be. Keeping VVT is a big decision, it limits your choices down the road, most tunners would rather not deal with it, gm supercharger spacing will not work with truck spacing. if this is just the start of your modifications you may want to dump vvt.

nakedpants

I only convert to camaro or corvette front end accessories and LS3 intake to be able to close the hood. So the L92 truck and L99 harmonic balancer/crank pulley are the same or have the same depth? Could I then just install an L99 water pump, leave the truck power steering pump where it is with the stock mounting bracket and get a special bracket to relocate my truck alternator? Would this work? Then I would only need to get a L99 water pump and a special alternator relocation bracket.

67Skylark

Yes I believe you are correct on all points. Both the LS3 corvette and the YL6 have a one piece bracket that supports both the power steering and the alternator. I have seen pictures where they cut the truck bracket down to use the smaller alternator.

nakedpants

Looks like I only need to use the truck throttle body with the LS3 intake to clear a 2007+ truck water pump on my L92 (see here). As it is a 2008 engine I dont even need to get a new water pump then. Just the alternator relocation bracket to be able to clear the hood. Are the brackets from lsbrackets reasonably priced or are there cheaper ones available with the same quality?

1989GTA

Is your truck throttle body a 3-bolt?

nakedpants

No, it is a four bolt one.

Project GatTagO

iTrader: (7)

Check out the Holley accessory brackets. They have spacers that will work with the various balancer set-ups and will mount the alternator up high on the driver's side like a Corvette mount.

http://documents.holley.com/199r10606rev7.pdf

Andrew

hdflstf

That's the path I'm on (for better or worse...). The Corvette setup will not clear the VVT timing cover though I need the clearance. It looks like the Gen 5 (LT1) timing cover is the answer. Luckily I have my C7 right next to the project and can see the difference. I'm still a little unsure about what other VVT hardware may be needed to make it work though.

Project GatTagO

iTrader: (7)

I believe the Gen IV and Gen V front covers are not interchangeable.

Andrew

hdflstf

Hmmm. Any place that we can confirm the interchangeability? I've been looking all over the forum for a definitive answer but so far no answer found.

BTW, I'm not meaning to derail the current thread, Figured this was a possible path based on the initial questions. If there are issues, I can take this elsewhere..

pantera_efi

iTrader: (1)

Hi NP & HD, I can help/provide the VVT "tech"

First state the EMS controller that will run the L92s ?

Worst case would be to fit my VVT "stand alone" controller with a cost of $200.00.

There are important changes for high RPM operation with VVT use that are easy to get correct the first time.

Example : Let the VVT motor Advance the camshaft ONLY with the use of Limiters for a HARD Retard STOP.

Lance