OK, so I found out that my engine wasn't going to fit with the truck intake on it, so I found a ls6 intake with a FAST 90 mm tb to put onto it, question becomes this, si there anything else I need to swap out? I know that the front accessories are going as well, they didn't fit either, so I'm going with the ls1 accessory brackets, but wanted to know what else would have to be swapped and part numbers if at all possible?

I know the fuel rails have to be changed out correct? Anything with the wiring harness? Thanks guys

otis

 

Sorry forgto to say that the engine is an 02 lq4 engine. Again, I'm just not sure if th els6 intake/TB that I'm looking at will bolt on or not, maybe I'll just have to go with the carb setup.

 

The 90mm TB will not fit the LS6 intake. The LS6 intake has the 78-80mm 3 bolt throttle body and the 90mm throttle bodies all have a 4-bolt pattern, as far as I know. The only LS6 intake that I have seen that can take the 90mm is the TPIS where they cut off the TB flange and put a LS2 style flange on it, so the 90mm can bolt up.
I would say put the L92 heads and L76 intake on it and throw a good cam in and you'll be looking at 500+ hp. There was a series of articles in Hot Rod way back in Oct to Dec 2007 where Duttweiller tried all kinds of different mods, including the L92 carb set up, on a LQ4. He ended up making 690hp with a Radix and 750hp w/ methanol injection on the stock bottom end!! If you could get your hands on the Oct, Nov and Dec 2007 issues of Hotrod magazine that should tell you all you need to know about what you need to do - from mild to wild - to make your motor run, for a very reasonable dollar to HP cost to boot.

 

The reason I'm not using the l92 intake is like the lq4 intake on there now, it won't fit under my hood. See the swap is actually going into a Monte SS, so getting ti to fit is the key, so any help would be appreciated

otis

 

Anybody else? Will I need injectors? Fuel Rails? Wiring harness? I am just trying to get everything together to get this done. Thanks for any help guys.

Otis

 

you will need the car style injectors, different pigtails for the injectors, and fuel rails. is the car return or returnless fuel injection? if interested i have a pro-prod 85mm intake and 85mm throttle body with aftermarket fuel rails, plus ls1 injectors id sell ya.