LT1 swap update - split loom install
- Thread starter JD1964
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Making progress slowly mainly due to lack of free time and multiple other projects also happening like engine rebuild on my Mazda B2200 and fuel injector, MAF swap and bypass valve install on my 92 Foxbody. Right now I'm figuring out a low mount alternator and PS pump configuration for the LT1. Also sizing up cross member location and driveshaft requirements. Have not yet put the LT1 into the wagon. I've sorted out the portions of harness I need to use from the Z28 and have that set aside.
When I get pictures worth posting, I'll do so.
I need to have the wagon driveshaft cut shorter by 2.5 inches since its a TH350 short tail coming out and a 4L60E going in.. Or, find one from another car that's the right length. I need roughly 50" from u joint to ujoint.
When I get pictures worth posting, I'll do so.
I need to have the wagon driveshaft cut shorter by 2.5 inches since its a TH350 short tail coming out and a 4L60E going in.. Or, find one from another car that's the right length. I need roughly 50" from u joint to ujoint.
We found a 77 Camaro in junkyard a it still had the driveshaft undamaged. It came out easy and its in the garage now. These ones are 48.5" which falls 1" short but that's if you are considering the stock length yoke. We're changing the to a longer yoke to make up the difference. This process costs 1/2 a much as cutting our current TH350 shaft down. It also lets us save the current driveshaft in its original length in case we want to swap back later. The 77 Camaro also had two really nice 40 series Flowmasters which we also snagged. Those are $80 each new but we got them for $18 each. The driveshaft was $38. We also snagged a throttle cable from a 95 S10 Blazer that looks like it will work. All that's needed is to maybe enlarge the hole in the TB linkage a tad.
We will be venting the '94 opti and I have all the parts ready for that.
Here's my plan for the alternator low mount on passenger. This is just a basic mock at this point. Once I trim the upper part of the factory bracket the alt will roll in tighter to the block. On the front of the serpentine damper you see the single V-belt pulley I have mounted. Hopes are that this will drive the original Malibu PS pump on the drivers side. With some bracket mod it looks like it may work. It lines up pretty close even without spacers on first check. I may have to clock the pump within the bracket and away from the engine enough for ignition wires coming off the opti on that side.
We will be venting the '94 opti and I have all the parts ready for that.
Here's my plan for the alternator low mount on passenger. This is just a basic mock at this point. Once I trim the upper part of the factory bracket the alt will roll in tighter to the block. On the front of the serpentine damper you see the single V-belt pulley I have mounted. Hopes are that this will drive the original Malibu PS pump on the drivers side. With some bracket mod it looks like it may work. It lines up pretty close even without spacers on first check. I may have to clock the pump within the bracket and away from the engine enough for ignition wires coming off the opti on that side.
Fyi, the z28 lt1 factory throttle works fine with the gbody gas pedal, if you still have it. I have it on my lt1 powered cabellero.
Hmm. I’ll have to check that out. I thought because the z28 cable goes to an ASR motor first, then a second cable goes to the throttle body that it wouldn’t work.
Yeah I’m pretty sure the 94 z28 I stripped was one of the few that came with ASR or TCS as it’s also referred to. I’ll check the parts bins but I’m pretty sure it’s two shorter cables with the ASR motor between them. It was a late production 94.
Also has 3 fan relays instead of 2. With the 3 relay setup, both fans would always come on together, although they were configured in a multi speed setup which was triggered by whatever the cooling demand was at a given time. On the 2 relay systems. Sometimes only one fan would run. The second fan would not run unless ac was on or there was a higher demand for cooling needed.
I wouldn’t call it an oddball, but this late 94 was rare in that model year, so it fools some people.
Also has 3 fan relays instead of 2. With the 3 relay setup, both fans would always come on together, although they were configured in a multi speed setup which was triggered by whatever the cooling demand was at a given time. On the 2 relay systems. Sometimes only one fan would run. The second fan would not run unless ac was on or there was a higher demand for cooling needed.
I wouldn’t call it an oddball, but this late 94 was rare in that model year, so it fools some people.
cool, I’ll be looking at a 94 Fleetwood later this week and maybe get a few parts there too. That cable might work. All depends if it has ASR or not.
Progress is always good.
Why are you having to modify the alternator bracket , also why are you using a Malibu ps pump. Sorry so many questions im just planning on going the same route as you, and im gathering as much information as possible.
Why are you having to modify the alternator bracket , also why are you using a Malibu ps pump. Sorry so many questions im just planning on going the same route as you, and im gathering as much information as possible.
The Camaro LT1 has all belt driven accessories on the passenger side. On the drivers side is only the electric powered air pimp (obviously ditching that) So, with possible twin turbo setup in future plans I wanted to free up an equal amount of space higher up on each side of the engine. So, in this case the accessory bracket on the passenger side will only be holding the ALT. and no longer holding AC (delete) or PS. To keep the PS on the passenger side would require adding an idler pulley over there too which defeats the purpose to try and balance the space useful to turbo headers, turbos and related piping. The mods to the accessory bracket itself will mostly be cutting away any portion of the upper section that I wont need. The lower tab originally used for the AC compressor is in the right place to mount one of the ALT ears. I'll need to make a small bracket adapter to secure the other end of the ALT. The ALT will be fixed in mount and the factory tensioner in it's factory location will be used for belt adjustment.
The Camaro PS pump was designed for rack and pinion while the Malibu has old school power steering gear. So, the pumps are different in their pressure output. The Camaro pump would probably work but it does put out lower PSI (like 200psi lower). But even more important to keeping costs down, my planned location of the Malibu pump on the LT1 engine is basically in the same place it is now on the L31 350 that's in the car now. With that, no mods to the pressure lines will be required. Just line the Malibu pump up on the lower left side and done!!
I'm not exactly sure how it all will fit and I wont know until the engine is in the car. I wont be cutting the factory Camaro accessory bracket until I'm sure my plan works out. I'll even run the engine on battery only with no alt or power steering installed just to move it in and out of the garage if needed. Luckily the LT1 water pump runs off the camshaft. So there's no harm in running without an accessory belt at all. Only, the engine will cut out when the battery dies. But no cooling issues without a belt. And I'll eat my Wheaties for turning the steering wheel without a pump installed. I certainly dont plan on keeping it that way but these accessory mounting tasks are one of the things I cant iron out for sure until the engine is in the car.
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