So I have a 91 very that I swapped in a L98 8 years ago and at the time deleted the account since it wasn't working anyway. How big of a project and expense would it be to add it back in?

Also should I swap to a serpentine belt setup at the same time and what would that entale?

 

You have two paths from which to choose; the first is to find a '91 donor car with AC at a salvage yard, and get everything you'll need. The other is to go the aftermarket route. Each has advantages and disadvantages, and both will be expensive, especially if you don't do the work yourself. Keep in mind that 30-year old junkyard parts will probably also need rebuilding/repair (the compressor, in particular), and aftermarket systems won't look like factory-installed equipment (if that's a concern for you).





Too late to help you, but may be of value to others here thinking of "deleting" your AC: Don't unless you're building a race car. Anything you remove from an otherwise complete factory car will only reduce it's value and further-remove it from original. If you must remove your AC, do so in a way as to not destroy any of the components. Tag all the hardware and box everything up so it can be restored at some point in the future, either by you or the person who buys the car from you if/when you sell it.

 

Problem is, whatever you have to do to PUT IT BACK, depends on HOW IT WAS TAKEN OUT. Nobody here can tell any more about that than you, since you did it.

In a perfect world you would have just unbolted everything, put it in a box, and stored it away in your attic. Nothing would have been fornicated during the process; no cutting, no torch, no throwing in the trash, just a careful and logical eye toward the future.

As far as any difference between a L03 and a L98 as far as the accessories and belt routing and all that, can't be all that much. For that matter you could bolt all the L03 stuff onto the front of the L98 and send it. It'll all fit and at least work, whether it would be as good as possible or not.

I like ironwill's advice. Can't tell you how many times I've posted the same sort of thing, about lots of systems, AC included. The benefits of sodomizing a car in that general way are rarely worth accepting the consequences. Although, one might not realize that until MUCH later, like this case.

 

I can do all the work myself.

So im thinking I need the following:

Compressor
Condensor
Accumulator
Evaporator
3 lines?
Orifice Tube
O ring Kit


I never chopped apart the harness form the 91 speed density harness i tucked away the connectors needed.

what am i missing? I guess an evaporator box - which is in the firewall if i remember?


Also the motor is from an 87 Iroc but runs a speed density 91 harness and eblp4 flash ecu. It has V belts. So am i buying parts for an 87 or a 91 or are they the same? With the belt setup id imagine they arent.

 

No they're not the same.

Can you put the TBI accessory setup back into the car? Do you still have it? You'd have to change to the CCW rotation water pump.

 

ok rather then swap to the serpstyle can i just keep the v belts and get a compressor for that without changing the water pump?

 

ironwill sounds like he's done this before.... and it sounds like you want AC but you don't want to spend a lot. He had it right, without having all your factory parts, IT"S GONNA COST LOTS. If you go do it on the cheap, it will be no end of a headache, either. Within the context of your particular situation, a basic kit from one of the aftermarket AC producers is your least expensive, least headache route to your goal over the long haul....
This way the style of accessory belts and front drive system will likely be dictated by the manufacturer of the AC system.

 

No im willing to spend whatever I got to put it back to factory. I just kinda need a punchlist of what I need. Im fine with staying with V belts.

 

I'd want to dump the V-belts, regardless of the A/C advantage. The 87 V-belt setup is one year only. Aside from being overly complicated, and subject to slipping belts, the 85-87 A/C lines are long since obsolete. Last I looked there aren't even any reproductions available. The serpentine a/c hoses are available from most of the national chain stores. So you get a less complicated system, a less likely to slip belt, and compatibility.

Search for threads on the serpentine swap and treat it like a separate project. Address the A/C after converting the belt drive.

 

If I go with this what else do I need? - https://www.summitracing.com/parts/n...oaAlzVEALw_wcB

I figure a condensor, accumulator, lines from a 91????, evaporator core and evaporator box, r134A retro fit, Anything else?

 

Personally I'd skip the GMPP kit. It's designed for carbed cars, not TPI. That means on top of the $1,276 you'd still have to track down the TPI specific braces, and fuel lines. You'd be a million miles ahead to put a want ad in the classifieds, or look for a junkyard car. The accessories from a TBI car are close, but a couple of the brace bars are different since the TPI intake puts mounting bosses in different places.

Beyond that, you'll need to move a couple wires around since the a/c and alternator are reversed. The rest of the differences are primarily A/C related. Search for serpentine swap how-tos and read them. It's fairly straight forward.

 

You have the interior stuff? Control head, vacuum lines and all that, blower motor, fan, housing, it's all different from non-AC, or you still have some of yer old stuff?

 

I never touched that i just simply removed all the components and tucked the connectors in the harness away.