They are both MAF so would my 86' wiring harness match up? Is the altenator on the opposite side of the engine on a 350 campared to 305? It seems like every picture I've seen the 350 alt. is on the right whil the 305 is on the left. What can I do to solve this? Just put the 305 accesories on front of the 350?

 

Could someone please answer!? I'm in the process of negotiations of getting a 350 TPI with 88' TPI that is MAF. So would the harness work?

 

The alternator is on the right side if you have a serpentine setup (88+), and on the left side if you have a v-belt setup (87 and older). If the 350 you are buying from the 88 comes with all the accessories, then go with the serpentine setup. Otherwise, you might as well just use your accessories from the 86. Either setup will bolt to a 305 or a 350 just the same. As for the wiring harness, I would think that 86 and 88 are the same.

 

Wait, wern't they still using either carbs, or TBI in 86? Just because its a maf car, doesn't mean the harness will fit, and the computer probably won't work either. (at the very least you will want it reprogrammed!) I am pretty sure though you will need a new harness and computer. There is a lot of info on this site about the history of the F-body, maybe you do have a TPI setup...this is all coming from memory

 

It says 86 TPI in his sig, and I'm assuming the 88 is also TPI since it's a 350.

 

Yeah I have and 86' IROC 305 TPI. The engine is a 350 with an 88' TPI system. They are both MAF. The 350 has a different cam and comes with a different ECM for it. All I'll have to do is switch the accesories over if they are different and use my distributor from the 305 so it matches the harness.

 

hmmmm....I was pretty sure 87 was the first year for F-Body's to get the TPI, but gaain the whole memory thing....or maybe its not stock....either way...
Now again coming from memory (Take it for what its worth) I believe the 305 used 19# injectors and the 350 used 24#.....I know the LT1 uses 24# so maybe it was an upgrade. If I get stuck on my car today, maybe I'll do some research lol, try and refresh my memory

EDIT: bah, it bothermed me so much, I had to go look. 85 was the first TPI and was avail in the iroc.....man I feel dumb lol. As for the injectors, the 350 used 22# injectors, so the program on your computer will be confused as hell trying to maintain an AFR. It should still work, but youwill probably want to reprogram it...

EDIT again...: I had left this page up and did a new window for research....didn't see your post until it refreshed from the edit

 

1985 was the first year for TPI. The IROC is the most notable car to use it (I think anyway). I think the 350 used 21* or 22* injectors.

 

85 was the 1st year for tpi in either the Iroc or Trans am. 350's have 22# injectors while 305's have 19# injectors.

All of your accessories will bolt on to the 88 block. You won't have a problem using the 86 wiring harness. You will want to burn your own chip for the 350 though, and get an adjustable fuel pressure regulator if you don't plan on switching to 22# injectors.

 

 

You're original wiring harness will plug right up to the newer 88 350 engine.

As for the ECM, it's MAF calibrated.... so you don't 'really' need a new chip burned, as this is more for speed density set ups.

As long as you go with bigger fuel injectors, you should be fine.

BTW... is it installed yet? How does she run?

 

No it is not installed yet. I wish it was. The 305 is doing great for now. It is running great by the way.

The guy hasn't got it out of his car yet cause he doesn't have his big block for it yet.

The engine comes with a ECM for the different cam that is in it. It has a 350 TPI set up so I don't need to get different injectors.

Anyone got an idea on how long I can expect it to take?

 

That's good! I thought that you were only getting the engine, and that you were going to utilize you're own TPI system.... but since you're getting everything from the donor, it will be an easy swap!

We swapped a 305 TPI for a 406 (with TPI) last year for my friend's 87 TA. With three of us, the whole install took 4 hours... and it ran great afterward.

This is why I mentioned not to change the chip, because even with the addition of the 101 cubic inches....and with aftermarket injectors (if I remember right they flowed 32 lbs), the MAF itself made everything work.

My advice is, don't rush.

 

Yeah I don't plan to rush. This car is my baby. My friend who has an 86' carbed 350 no AC or AIR or any real wiring harness said it took him a week to take the engine out.

I don't really see why it took him so long after reading how you guys did it in 4 and others in two days and so on.

 

It probably would have taken us longer, but we were determined.... and we were racing against the sun-light. With the car on jack-stands, we focused our attention to individual area's (one had the tranny, one had the mounts and other connections, one had the wiring etc...).

Definitely remove the hood, and pull the engine out with the transmission attatched. Once the cherry-picker is hooked, have someone slowly raise the engine up.... and some others guide it out.