2004 GT Top Swap (Lots of Pictures)
- Thread starter Storm
- Start date
Scimmia
New member
Re: 2004 GT Top Swap
No. First off, the Gen III doesn't have a MAP built in, it's mounted on a bracket on the back of the blower. Second, as I said, YOU HAVE TO MATCH THE MAP TO THE COMPUTER USED. If you're using your stock computer, you need to use your stock MAP.
No. First off, the Gen III doesn't have a MAP built in, it's mounted on a bracket on the back of the blower. Second, as I said, YOU HAVE TO MATCH THE MAP TO THE COMPUTER USED. If you're using your stock computer, you need to use your stock MAP.
Storm
New member
Re: 2004 GT Top Swap
How the hell can I use the stock MAP if it doesn't read boost? ZZP says they will give me a tune for a top swap on my car, does this mean they will give me a PCM from a L32 engine?
How the hell can I use the stock MAP if it doesn't read boost? ZZP says they will give me a tune for a top swap on my car, does this mean they will give me a PCM from a L32 engine?
Re: 2004 GT Top Swap
I believe tuning it will fix that. If ZZP says they will give you a tune and you do not send in your pcm first than yes they will give you a new pcm.
On another note, the harmonic balancer... This was the hardest part of the top swap for me. You have to remove the inspection cover and jam the flywheel with a HUGE screwdriver. Than either get an impact gun if available or a HUGE breaker bar. We had to use a breaker bar and the pole off of my jack to create an even bigger bar and the bolt broke loose easy. Than I had the pulley puller from advanced but the bolts were to big!!!! So either get one from ZZP or go to the hardware store by the longest skinniest bolts you have screw them into the pulley! Not behind the pulley like it is supposed to be used. (you might need to use sockets as spacers) Than twist the big bolt provided in your puller kit so that it pushes off of the crank. It is almost using the tool backwards. If you dont want to do this order the puller off ZZP and it can be used as it is intended.
Also get a gen 5 supercharger and all the L32 components it will be much easier.
I believe tuning it will fix that. If ZZP says they will give you a tune and you do not send in your pcm first than yes they will give you a new pcm.
On another note, the harmonic balancer... This was the hardest part of the top swap for me. You have to remove the inspection cover and jam the flywheel with a HUGE screwdriver. Than either get an impact gun if available or a HUGE breaker bar. We had to use a breaker bar and the pole off of my jack to create an even bigger bar and the bolt broke loose easy. Than I had the pulley puller from advanced but the bolts were to big!!!! So either get one from ZZP or go to the hardware store by the longest skinniest bolts you have screw them into the pulley! Not behind the pulley like it is supposed to be used. (you might need to use sockets as spacers) Than twist the big bolt provided in your puller kit so that it pushes off of the crank. It is almost using the tool backwards. If you dont want to do this order the puller off ZZP and it can be used as it is intended.
Also get a gen 5 supercharger and all the L32 components it will be much easier.
Re: 2004 GT Top Swap
Uh vice grips on the flexplate would be easier.
Just use a nice 1/2" 40" breaker bar and a 15/16'ths socket. Use the car as leverage and it should come off.
I found it more difficult torquing it back down than getting it off.
Just get the ZZP bolts and make sure they're fully threaded before you start trying to pull it off.
Lets settle this once and for all... you NEED a 2 bar MAP sensor. Get one, and make sure the map tables are for the tune that sensor is from.
Top swap IMPLIES you are using the GM 2 bar map sensor.
Uh vice grips on the flexplate would be easier.
Just use a nice 1/2" 40" breaker bar and a 15/16'ths socket. Use the car as leverage and it should come off.
I found it more difficult torquing it back down than getting it off.
Just get the ZZP bolts and make sure they're fully threaded before you start trying to pull it off.
Lets settle this once and for all... you NEED a 2 bar MAP sensor. Get one, and make sure the map tables are for the tune that sensor is from.
Top swap IMPLIES you are using the GM 2 bar map sensor.
Storm
New member
Re: 2004 GT Top Swap
This is a picture of a Gen V supercharger it confirms that the L32 fuel rail and injectors will bolt in because that looks exactly like my L26 injector rail configuration except injectors bosses are in heads not intake manifold. Can someone point out the whereabouts of the MAP sensor on this engine.
Thanks
This is a picture of a Gen V supercharger it confirms that the L32 fuel rail and injectors will bolt in because that looks exactly like my L26 injector rail configuration except injectors bosses are in heads not intake manifold. Can someone point out the whereabouts of the MAP sensor on this engine.
Thanks
Storm
New member
Re: 2004 GT Top Swap
Continuing with a couple questions here.
1. What sensor is this?
2. Where will this hook up to?
3. Will need this tube after the swap?
4. Where will this sensor be located? Is it going to be on the supercharger? What is this sensor called?
5. To take the fuel rail apart I take that clip off obviously... do I need a special took to get the connection apart or do you "pinch" it and it comes apart?
6. Do I need this coolant port from an L67 intake or are they interchangable?
7. MAF sensor (obviously) I keep my stock MAF for the swap?
Continuing with a couple questions here.
1. What sensor is this?
2. Where will this hook up to?
3. Will need this tube after the swap?
4. Where will this sensor be located? Is it going to be on the supercharger? What is this sensor called?
5. To take the fuel rail apart I take that clip off obviously... do I need a special took to get the connection apart or do you "pinch" it and it comes apart?
6. Do I need this coolant port from an L67 intake or are they interchangable?
7. MAF sensor (obviously) I keep my stock MAF for the swap?
Scimmia
New member
1. That's the EVAP purge solenoid. It's one I hadn't really considered. If you're using a Gen III, you'll need the L67 EVAP setup. The Gen V uses the same setup.
2. That's the brake booster vac line, it goes to that vacuum manifold on top of the blower that we talked about earlier.
3. That's another one I hadn't considered, it's the PCV inlet. You'll either need to get mini to add a port for that on the adapter or run the line to the front valve cover instead. Again, that's only if you use the Gen III, it should hook right up to the Gen V.
4. That's the MAP sensor.
5. You need a special tool, available at any auto parts store.
6. They're the same.
7. Keep your stock MAF.
2. That's the brake booster vac line, it goes to that vacuum manifold on top of the blower that we talked about earlier.
3. That's another one I hadn't considered, it's the PCV inlet. You'll either need to get mini to add a port for that on the adapter or run the line to the front valve cover instead. Again, that's only if you use the Gen III, it should hook right up to the Gen V.
4. That's the MAP sensor.
5. You need a special tool, available at any auto parts store.
6. They're the same.
7. Keep your stock MAF.
Storm
New member
Speaking with another member on here who has done this same swap before except he did a Gen V on a 2005 GT, he said I am goingto have to wire in a barometric sensor to the PCM as well as wiring in the wires for the BBV. Easy to forget these things looking at the big picture. Doesn't sound too painful though. My parts list right now is looking like $1100 total for a Gen V swap. I think I could get a Gen III swap for closer to $800 or even $750.
Storm
New member
What does your second sentence mean? Traction control system? So I don't need a barometric sensor because it only effects traction control system? very confused.
barometer measures pressure, thats what the MAP sensor does. MAP means Manifold Absolute Pressure.
You dont need to hook up the BBV (Blow by valve) solenoid as long as you turn traction control off every single time you turn the car off. If you do not wish to disable traction control all the time, then you need to hook up the BBV solenoid.
You dont need to hook up the BBV (Blow by valve) solenoid as long as you turn traction control off every single time you turn the car off. If you do not wish to disable traction control all the time, then you need to hook up the BBV solenoid.
nascartech
New member
just get a full l32 top lim heads s/c map rail and injectors harmonic balancer and ideler pully reason i say l32 s/c is because it is more efficient and easier to put ur tb on to