First time swap. LQ9 into 95 OBS

[kewljay223]

the DBW pedal/module is the same from a gmc truck as a chevy/caddy correct? found one on car part that i can pick up today if its the same

[kewljay223]

hey again. just an update. picked up the DBW pedal/TAC/Harness today out of an 05 escalade so it should work perfect. and i got the harness all disconnected and removed from the motor yesterday so i can start going through it. labeled everything that was hooked up but there is still a lot that wasnt that i need to figure out what they go to. ill dive into it in a day or two.






i also got a list of the rest of the major parts i need which im ready to purchase tonight. please let me know if i missing anything so i can add it to the shopping cart.

dirty dingo mounts
Walker CalCat Catalytic Converters 81713
Bosch Automotive 15730 - Bosch Premium Universal Type Oxygen Sensors X 4
Chevrolet Performance 12563532 - Chevrolet Performance Flexplate Shim
Chevrolet Performance 19257940 - Chevrolet Performance Flexplate Bolts X 6
ACDelco EP381 - ACDelco Electric Fuel Pumps
Allstar Performance ALL34153 - Allstar Performance O2 Sensor Bungs X 4
PCM tune

i still need to do something about the fuel tank pressure sensor in my obs tank that doesnt have one.. i read somewhere that they are used on returnless style systems and i have two lines on my rails... so i i will be using the return line setup since the truck already has the lines. do i need the pressure sensor? if so can i just add it to the tank or is there more involved? also looks like im going to need a fuel level sensor too??? can that be added? i know nothing about all the emissions crap and thats whats got me confused and unfortunately that is a major part of this project. ive tried looking all over the internet but not many people are doing emission swaps so there is little info. anyone with smog knowledge please chime in!!

[kewljay223]

thanks mikey for the tip on posting pics. worked perfect!

anybody know where i can get the piece to weld onto the exhaust pipe to bolt to the manifold? idk what its called. the thing thats shaped kinda like a triangle with three bolt holes and one big hole in the middle for the exhaust to flow. i thought it was a "flange" but looking through summit they consider a flange a gasket... i guess its more like a collector flange but that seems to be more geared to headers. i need 2 of them so i can mock up the exhaust so i can get it running to take to the exhaust shop to do the final install.

[Mickeymotormount]

You are right on in calling them flanges. There are some on Ebay:

http://www.ebay.com/itm/LS1-Exhaust-...d530dd&vxp=mtr

http://www.ebay.com/itm/Chevrolet-LS...3a6af1&vxp=mtr

[kewljay223]

dude thats perfect. ill pick those up. thanks. did you have any issues with fitting your exhaust in? which mounts did you use? id like to get the same setup as you if yours went pretty smooth. and how did you do your exhaust? did you fab it yourself?

[Mickeymotormount]

I ended up using the stock 6.0 dual exhaust system from the donor truck. It has twin 3" pipes to twin catalytic converters back to the muffler. From the muffler it's a single exhaust outlet.
As for the mounts, I used ones similar to these:

http://www.ebay.com/itm/LS-LSX-Engin...b0ed0f&vxp=mtr

If you are shopping for mounts, be sure to get the 1" set back plates. This way, your trans will end up where it should be for all your driveshafts to work. When I did mine, I did not know about the 1"setback and ordered standard plates. That bumped my trans/transfer case forward 1" of where it should have been. My driveshafts still worked but it did tighten up the space in front of the engine between the fan and the radiator. It did help though in running the 6.0's standard exhaust in the OBS truck.

[Ian Johnston]

Just make sure that the 2 fuel lines are feed, and return, and not feed, and vapour return. Out here in Aus, our GEN111s have a pressure regulator as part of our fuel pump/guage sender that is all in the fuel tank. You blokes seem to use the Corvette filter/reg
for the preset pressure. I dont know what your trucks run otherwise.

I used a book called Chevy LS Engine Conversion Handbook by Shawn Henderson. Very helpfull.

[kewljay223]

i like those plates. i was thinking of getting the dirty dingos but those are half the price and seem just as good. thanks for the link. a

and Ian, i have a similar book "How to Swap GM LS-Series Engines into (Almost) Anything". ill look into the one you mentioned tho. the more literature the better. thanks. and i just realized yesterday i have a buddy who has an 03 escalade!! well his wife does... i cant belive i had forgot. so im going to go check under the hood/chassis and see what the setup is and copy it. if she lets me near it that is... lol maybe ill bust a secret mission at 3am....shhh... she might be missing parts the next day tho...

[Mickeymotormount]

It's always nice having another running vehicle to make comparisons with. If she lets you near it, it should be helpful.

[kewljay223]

so ive been doing a sh**-ton of research on whats required for emissions and how all the compents work/what they do the past few days and i actually get it now! lol id say 85% but still. it seems i need the carcoal canister,purge solenoid valve,vent solenoid valve(already on the intake), nesessary tubing for the EVAP system, fuel tank pressure sensor, fuel sender(signal for pcm,not gauge), o2 sensors,and 2 cats. it seems EGR is not neccesary on DBW equiped vehicles as they do a better job in getting the correct air/fuel mixture so i dont need it. that pretty much covers it i think. my only issue is the pressure sensor/sender as they are part of the fuel pump/float assembly. since my 95 is pre obd2 it only has a 2 wire sender(i need 3 wire) and no pressure sensor. but the 96-98 were obd2 cars and those assemblies have what i need along with the higher pressure pump AND its a direct fit since our tanks are the same!!! so i just gotta get me a newer style assembly and im good to go on that!!!

just thought id post that in case there are other californians that want to do a legal swap and are confused as to what is needed. hope that helps someone out!