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Swapping TPI setup onto LG4
Posted: Thu Jan 02, 2014 5:57 pm
by warlord
I was just wondering, would the TPI setup from an 89 350 fit on a 305 LG4(carb) in my 83 T/A?
I know the TPI injectors and ecm would need changing for the 305 version. Just not sure if it'd bolt on as I know the 87 on blocks are different somehow.
Thanks.
Richard
Re: Swapping TPI setup onto LG4
Posted: Sat Jan 04, 2014 5:19 pm
by Newcastle knight
hmmm, not sure really, first thing to check is if the manifold fits on the older engine, then you might have to fit a newer electric fuel pump to give you the right fuel pressure to the TPI's fuel rail.
im currently swapping my 305 TPI engine for a 350 one. Ive sold the TPI engine but ive kept a few bits off it like the ECU, and ive also got a really nice condition engine wiring harness from an 89, i was told it would fit my 87 but its different so its no good to me, that was 140 quid well spent....
Re: Swapping TPI setup onto LG4
Posted: Sun Jan 05, 2014 2:06 pm
by warlord
I've been doing some searches on thirdgen.org and it looks like it'll fit. I just need to oval out the 4 middle bolt holes and use an adapter as the bolts are at a slightly different angle.
The TPI setup I have was from an 89 gta 350 that I stripped, so I have most of what I need. just need some 305 injectors 305 ecm etc, I'll have to get a new fuel pump too as the car was a non runner and best to be safe. I think some of the wiring needs a bit of repair and a few connectors are missing.
I've got to recon my heater box as I'm fed up with those little bits of foam blowing out the vents and it hisses for a bit before doing anything. so as I have to take the dash out, I might as well put the 89 dash in. will be easier than wiring in the tpi to the current fuse box. plus I can have central locking and delay wipers as a bonus. depending on how easy it is to change the wiper switch in the column as the 89 didn't have one.