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Series I to Series II. 3800sc.

T

toof

New member
Hey, all. The Series I SC engine has spun a bearing but I have a series II SC engine from a wreck (1998 -2000). Can I just replace the engine lump (supercharger and all) and be back running?

The main question is if the wiring and sensors are mostly plug and play?
Secondarily, what will the limitations be?
 


No, both are SC engines. The goal is just to keep driving a supercharged car by replacing the series I with series II.
 
you got car years the engines are both from? if ones a 04 up the other a 97-03 you need a tb adapter to use the 07-03 tb, re route some pcv crap, block off the gen 5 evap and thats about it really.
 
The series 1 engine was in the older cars, so pre-96 at least.

The computer is not going to be able to control the newer series 2 engine with any real hope of it running correctly. The series 2 makes far more power than the series one and you'd just end up blowing the engine up if you could even get it to run right on the OBD1 computer.
 
Scottydoggs, the Series II was made in 2004? Per the original post, my series II is 1998-2000. It's a 1998 according to my notes. The Series I is not original to the car, so I can't say for certain.

Fivefingerdeathpunch said:
The computer is not going to be able to control the newer series 2 engine with any real hope of it running correctly. The series 2 makes far more power than the series one and you'd just end up blowing the engine up if you could even get it to run right on the OBD1 computer.
Click to expand...

Okay, thanks. No go on this then. Was looking for a quick project completion and this all hinges on the computer as the limiting factor presently in use of course.
 


post pics of both engines, if they look the same like the same blower it will work. but if its got that m60 blower its not gonna fly.
 
the engine will run, however youll have to use all the SII accessories, and (since you gave us no info on the SI 3800 equipped vehicle) custom PS pressure line, ac lines, etc.

the problem is that the obd1 computer the SI used isn't able to use the knock sensors properly, nor scale the maf sensor properly, but it will run.

with SI ecm/computer programming issues, its often better to use the SII harness/pcm.

my 84 Cressida wagon is running a 99 SII PCM with my 90 "vin C" LN3 3800 (pre SI) engine....all sensors plug right in except the TPS/Maf/injectors on some models of SII harness'

need more info on the vehicle the swap is looking to be done on.... if its a first gen W then you can use the parts lookup for a 94/95/96 regal with the SII (vin K) engine option to get the correct radiator/hoses/heater core/ac lines/PS lines, etc
 
It's the smaller blower (M60?) on the spun bearing engine, the engine that I wanted to replace with the 1998 engine with larger blower. The 1998 engine has 150k miles and was in a gorgeously maintained GTP I found wrecked in a local yard.

Also have a 97-98 Series II engine (larger blower) from a Bonnie SSEi but has low compression according to my tester. No idea why it has low compression.
 
Turbocharged400sbc said:
the engine will run, however youll have to use all the SII accessories, and (since you gave us no info on the SI 3800 equipped vehicle) custom PS pressure line, ac lines, etc.

the problem is that the obd1 computer the SI used isn't able to use the knock sensors properly, nor scale the maf sensor properly, but it will run.

with SI ecm/computer programming issues, its often better to use the SII harness/pcm.

my 84 Cressida wagon is running a 99 SII PCM with my 90 "vin C" LN3 3800 (pre SI) engine....all sensors plug right in except the TPS/Maf/injectors on some models of SII harness'

need more info on the vehicle the swap is looking to be done on.... if its a first gen W then you can use the parts lookup for a 94/95/96 regal with the SII (vin K) engine option to get the correct radiator/hoses/heater core/ac lines/PS lines, etc
Click to expand...

Yeah, it was a hope that the engines could just be swapped and go.

It was swapped into a Fi ero and blew. The cradle was dropped out complete and the car scrapped. Those guys don't use power steering usually. It's set up to go back in one and since wiring and computer were already done I thought it would be a good way to get one of mine going quickly without the computer and wiring issues one faces doing a virgin swap.

EDIT: The Cressida sounds pretty interesting.
 
toof said:
It's the smaller blower (M60?) on the spun bearing engine, the engine that I wanted to replace with the 1998 engine with larger blower. The 1998 engine has 150k miles and was in a gorgeously maintained GTP I found wrecked in a local yard.

Also have a 97-98 Series II engine (larger blower) from a Bonnie SSEi but has low compression according to my tester. No idea why it has low compression.
Click to expand...
its been done before, its a load of work to swap over the whole obd2 system into the older car.
 


i dont know of any one making a harness for a w body really, its get both cars wire diagrams and make it work type crap iirc it comes down to like the dash cluster and stuff getting wired in.

now the fiero guys have people who make a harness for the 3800 swap.
 
On my Cressida a lot of wires or just cut and left open circuit I primarily only have the cooling fan on my crested a lot of wires are just cut and left open circuit hi primarily only have the cooling fan and miscellaneous control stuff hooked up along with power and ground to the Toyota harness.
The W body harness is actually. Quite good for swapping
 
JUst use sensors off running car, MAY have to source different injectors but both feed 3800. Only real difference is S1 is tall deck version of 3.8. If car is S1 car, use S1 sensors, etc. S2 wont know difference. swapping may require mods to mounts/making appropriate accessories mount. The flexplate may need drilled to match the converter, or not.
Been contemplating possible frankenstien S1/S2 build up for fun!
 


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