Drummer Posted September 4, 2011 Report Share Posted September 4, 2011 well since the motor in my 98 monte carlo Z34 pretty much seized up I found a supercharged 3800 with transmission for 600 bucks. the motor came from a regal with 60k so I think it's a no brainer to do this. So what parts do i need to make this swap possible? I already have a computer from a 98 GP GTP, and I think i need a harness for the supercharger or something but not sure what else i need. Anything else i am missing? Quote Link to comment Share on other sites More sharing options...
AMP Posted September 4, 2011 Report Share Posted September 4, 2011 beats me on part you need:lol: but good luck, that is going to be a pretty sweet monte. Quote Link to comment Share on other sites More sharing options...
Crazy K Posted September 4, 2011 Report Share Posted September 4, 2011 your car came with a 3800? you can use the 3800 harness and add the wires necessary for the bypass to your harness, and most everything else should be plug and play, I think.... Quote Link to comment Share on other sites More sharing options...
Drummer Posted September 4, 2011 Author Report Share Posted September 4, 2011 yes it has a 3800 in it Quote Link to comment Share on other sites More sharing options...
BXX Posted September 4, 2011 Report Share Posted September 4, 2011 Yeah, and I think just a few very very minor PCM repinning. But other than that, it's damn near a bolt in swap Quote Link to comment Share on other sites More sharing options...
95 vert Posted September 4, 2011 Report Share Posted September 4, 2011 Direct bolt in except for right side axle(if you have a 4t60HD with the S/C engine). Switch the inner CV axle joint from the Buick to your Monte axle. If you didn't get axles, you'll need to pick one up from a GTP or GS to swap the joint. Use your N/A PCM and have it flashed. No need to use the other PCM or repin. You'll need to extend the MAP harness and add a 2 wire connector to the PCM for the S/C selonoid. ZZP sells the harness kit for like 40 bucks IIRC. Quote Link to comment Share on other sites More sharing options...
carkhz316 Posted September 4, 2011 Report Share Posted September 4, 2011 (edited) PM me man. I just did a top-swap in my 98 Z last year. I know that's not a motor swap, but it's similar. As far as the wiring and harness goes, Everything is the same, save for the absence of the Boost Bypass Solenoid. You DO NOT NEED IT!!!!!!!! There is no way to tune any PCM for a 98-99 Monte to control it. Plus, it's only for purging boost in reverse and low traction situations. I mistakenly bought the harness from ZZP thinking I needed it. I didn't. If it bugs you to have it, it's only one wire that's routed to and pinned into the PCM, and one wire that is hooked to 12V. Everything else is plug and play. EDIT: x2 on extending the MAP sensor wiring and the axle swap. The MAP also uses a different style plug, so if you feel like soldering and have a donor pigtail harness, go for it. I didn't have the harness to I had to get the MAP sensor harness extension. EDIT EDIT: I remember that the MAP sensor wiring harness comes with the BBV solenoid wiring, so NM on that. Edited September 5, 2011 by carkhz316 Quote Link to comment Share on other sites More sharing options...
White93z34 Posted September 4, 2011 Report Share Posted September 4, 2011 The wiring is stupid easy to do up. I bought the map extension wiring.... total waste of money the harness was like 3 inches long. I ended up just extending it myself and sent that harness back. The wiring harneses are cheaper to buy right from Casper's Electronics then through intense, zzp. etc the BCS is easy to wire in, I scabbed the power for it from the heated o2 power wire (according to the H body service manual that ckt powers the BCS in L67 cars anyhow) I'm running a 97' L36 PCM that DOES now control the BCS. It IS possible. Contact BILEMKE on ClubGP. If you have a PowrTuner it is possible. Playing devils advocate... But you *could* use your non-HD 4t65 that you already have. It will have the better 3.29 gearing vs. the 2.89 gears that the Buick's trans will have. Quote Link to comment Share on other sites More sharing options...
AL Posted September 4, 2011 Report Share Posted September 4, 2011 If you do use your current trans, just swap the diff Quote Link to comment Share on other sites More sharing options...
95 vert Posted September 5, 2011 Report Share Posted September 5, 2011 PM me man. I just did a top-swap in the last year. I know that's not a motor swap, but it's similar. As far as the wiring and harness goes, Everything is the same, save for the absence of the Boost Bypass Solenoid. You DO NOT NEED IT!!!!!!!! There is no way to tune any PCM for a 98-99 Monte to control it. Plus, it's only for purging boost in reverse and low traction situations. I mistakenly bought the harness from ZZP thinking I needed it. I didn't. If it bugs you to have it, it's only one wire that's routed to and pinned into the PCM, and one wire that is grounded. Everything else is plug and play. EDIT: x2 on extending the MAP sensor wiring and the axle swap. The MAP also uses a different style plug, so if you feel like soldering and have a donor pigtail harness, go for it. I didn't have the harness to I had to get the MAP sensor harness extension. EDIT EDIT: I remember that the MAP sensor wiring harness comes with the BBV solenoid wiring, so NM on that. I'm actually not running a solenoid harness on my car but I did have the PCM tuned for my set up. It was so much simpler just to use the Monte PCM and, of course, the Monte harness on my swap into the Cutlass. I just figured that he would want to do it "right" and added the harness extension info. I didn't use the extension for the MAP either, just wired it myself. Quote Link to comment Share on other sites More sharing options...
carkhz316 Posted September 5, 2011 Report Share Posted September 5, 2011 I guess everything up til this point, I believed there wasn't a way to control the BCS in anything other than a car the L67 came stock in. I initially wanted the function, but upon discovering what it did, figured it wasn't a big deal to have it non-functioning. Also, my MAP plugs were different between the L36 and L67. The L67 MAP has the older 80's-90's style MAP and plugin when I swapped 'em. Quote Link to comment Share on other sites More sharing options...
White93z34 Posted September 6, 2011 Report Share Posted September 6, 2011 I forgot to mention about the map plug difference, my donor engine came with a good bit of the harness hacked off so i already had the plug pigtail. Quote Link to comment Share on other sites More sharing options...
Drummer Posted September 6, 2011 Author Report Share Posted September 6, 2011 The wiring is stupid easy to do up. I bought the map extension wiring.... total waste of money the harness was like 3 inches long. I ended up just extending it myself and sent that harness back. The wiring harneses are cheaper to buy right from Casper's Electronics then through intense, zzp. etc the BCS is easy to wire in, I scabbed the power for it from the heated o2 power wire (according to the H body service manual that ckt powers the BCS in L67 cars anyhow) I'm running a 97' L36 PCM that DOES now control the BCS. It IS possible. Contact BILEMKE on ClubGP. If you have a PowrTuner it is possible. Playing devils advocate... But you *could* use your non-HD 4t65 that you already have. It will have the better 3.29 gearing vs. the 2.89 gears that the Buick's trans will have. I would use my current trans but it shutters when warm if you give the car to much gas, and it has 140k on it. Quote Link to comment Share on other sites More sharing options...
Drummer Posted September 6, 2011 Author Report Share Posted September 6, 2011 Ok so I'm gonna have to get axles, my pcm tuned for the motor,get a L67 fuel pump, and get a map sensor plug. I'm a little confused with the BCS, what does it do? Is there anyone that can tune my PCM here or would BILEMKE be my best bet? Anything else I am missing? Quote Link to comment Share on other sites More sharing options...
95 vert Posted September 7, 2011 Report Share Posted September 7, 2011 You don't need a fuel pump. Stock one is fine (until heavy mods). Just the right side axle. BCS limits the amount of vacuum to the valve. Not sure the reasons why. I had ZZP tune my PCM (I sent mine in). I can't think of anything else at the moment. Quote Link to comment Share on other sites More sharing options...
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