I'd sh*t a chicken if the rotor pack fit. It's gotta be longer and/or fatter. Isn't the BCM a tiny plastic box? Can you just force feed it a power or ground to make it happy? On my trucks and the Corvette, the passlock module gives the PCM a handshake when everything checks out. Easiest way around that is to tell the PCM not to care.
L67 Fbird Revision B
- Thread starter 81cutlass
- Start date
M90, 112 and 122 have the same diameter pack family. The lengths are different. It's generally 15 cubic inch per inch, so a m90 (90 cubic inch per rev) is 6" in length, a 112 is 7.47" and a 122 is 8.125. M62 and smaller (think Cobalt SS, early Bonne SSEI) are a smaller rotor diameter.
It's not rare for people to make a spacer plate and stick a m112 pack into a m90 housing, the problem is that a m112 and m122 are gen 5 packs and my m90 is a gen 3 pack, a gen 5 pack mounting flange is significantly different than a gen 3 pack.
Basically a 112 pack in a 90 housing needs a 1.47" spacer and a slot cut in the lower intake. The M112 lightning blower sitting on my workbench has a 1.5" shorter snout, so if you buy a lightning m112 and an adapter plate and a have a gen 5 blower the belt drive basically sits right where it needs.
If I had a 04+ GTP blower instead of my 97-03 I'd very much consider a pack swap. The bolt pattern on the snout on how it mounts on the housing on gen 5 is different than gen 3 also, so to run an extended gen 5 pack you need a gen 5 housing.
Long story short, this case swap will work for my fiero buddy who wants me to machine him the plate, who has a gen 5 blower, but as I have the time invested in this gen 3 blower i'm kinda stuck there. If I went M112 pack swap I'd need to re-weld an elbow onto a new M90 housing, get a gen 5 lower intake, which is more than I want to deal with to make the car run another second faster in the 1/4 when I already have a car that runs 11's.
Diddly squat update
I've been doing this a lot recently, well, twice.
GM had inconsistent placement on their IAT sensors for years.
84-87 GN's- in the intake tube
91 Typhoon/Syclone & Sunbird GT + many more- In the intake manifold
97+ L67, in the intake tube
Most LS's are in the MAF
I'm too cheap to know anything post 2007 what GM does. LSA or LNF turbo Ecotec stuff? No idea.
The only right place for a IAT in boost application is in the intake manifold post intercooler or blower to see what temp air is actually going in the engine.
I put a Typhoon style 3/8 NPT IAT in the intake manifold in the LC2 that's in my cutlass last year
So doing the same thing on this L67. Easy swap, connector is the same. 5/8" drill bit, 3/8" NPT tap, NPT style IAT, bam!
I've been doing this a lot recently, well, twice.
GM had inconsistent placement on their IAT sensors for years.
84-87 GN's- in the intake tube
91 Typhoon/Syclone & Sunbird GT + many more- In the intake manifold
97+ L67, in the intake tube
Most LS's are in the MAF
I'm too cheap to know anything post 2007 what GM does. LSA or LNF turbo Ecotec stuff? No idea.
The only right place for a IAT in boost application is in the intake manifold post intercooler or blower to see what temp air is actually going in the engine.
I put a Typhoon style 3/8 NPT IAT in the intake manifold in the LC2 that's in my cutlass last year
So doing the same thing on this L67. Easy swap, connector is the same. 5/8" drill bit, 3/8" NPT tap, NPT style IAT, bam!
I would say put the IAT where the thing had it from the general, but matched to the PCM. While I agree that after is better, if the PCM originally had it before then the IAT map may make assumptions based on RPM and MAP of what it is post blower. Can you change all that with HPT?
Got distracted for a week on the boat, and have been thrashing for so long I needed to take a breather last week. Finally got back things Sunday.
Was back west at dad's and harvested a few parts off the 97
Seeing how nice the 99 is puts into perspective how bad the 97 is haha
This rust hole (+ many others) is why I am scrapping this one. I think i'm a 2.0 60ft away from putting the rear control arms thru the floor
On the list of things I had to do, this car had a pioneer head unit from the early 2000's. The steering wheel controls didn't work and it's not bluetooth and my phone doesn't have a aux cable so it's worthless now. I'd rather have a stock head unit and regain use of the steering wheel controls
97 coming in useful again. Cons, my damn steering wheel controls still don't work.
I stole the sun visors out of the 97 (for some reason the 99 were missing and ripped out??? and dropped in the T top shades from the 97.
Dad is supposed to pick the engine and car up to install the engine, but had a routine surgery and down for the count for a bit. We'll see if we can get the timing worked out and get this thing running before labor day.
Was back west at dad's and harvested a few parts off the 97
Seeing how nice the 99 is puts into perspective how bad the 97 is haha
This rust hole (+ many others) is why I am scrapping this one. I think i'm a 2.0 60ft away from putting the rear control arms thru the floor
On the list of things I had to do, this car had a pioneer head unit from the early 2000's. The steering wheel controls didn't work and it's not bluetooth and my phone doesn't have a aux cable so it's worthless now. I'd rather have a stock head unit and regain use of the steering wheel controls
97 coming in useful again. Cons, my damn steering wheel controls still don't work.
I stole the sun visors out of the 97 (for some reason the 99 were missing and ripped out??? and dropped in the T top shades from the 97.
Dad is supposed to pick the engine and car up to install the engine, but had a routine surgery and down for the count for a bit. We'll see if we can get the timing worked out and get this thing running before labor day.
Dad picked the car up Saturday and hauled it back west so he can pull the K member out and install the exhaust.
I need to wrap up the last few things on the engine before it goes back to Dad so he can drop the car over the K member
I checked leakdown last night, everything is between 3 and 6% leakdown so we're good there
Cleaned the valve covers off and bolted them on. Just need to bolt the blower and fuel rails on.
I need to wrap up the last few things on the engine before it goes back to Dad so he can drop the car over the K member
I checked leakdown last night, everything is between 3 and 6% leakdown so we're good there
Cleaned the valve covers off and bolted them on. Just need to bolt the blower and fuel rails on.
You might spritz that blower housing with some aluminum brightener. The stuff is magical.
Hack loaded the engine into the pickup
And hauled it 200 miles to Dad's. He's much better set up to load and unload stuff haha
He should have the engine loaded into the k member in a week or two and maybe laborday ish it will be back at my place to get final fueled and wired
And hauled it 200 miles to Dad's. He's much better set up to load and unload stuff haha
He should have the engine loaded into the k member in a week or two and maybe laborday ish it will be back at my place to get final fueled and wired
