So I've started the process of turbocharging my 2.8 with tgp parts. I have the radiator and intercooler in. I still have to fab up a bracket to get my fan to work, unless someone wants to let a tgp fan go for cheap. :icon_biggrin: I also put in a new high volume oil pump and tgp pan with a return line. I'm getting started on the exhaust, and I had a few questions.
Presently my air pump has a line coming from the rear exhaust manifold, near cylinder 3, and I noticed the tgp rear manifold doesn't have any provisions for this. Does anyone know if/where the air pump connects on the tgp? Do turbo and n/a cars have the same downpipe?
Also, I will be burning my own chip for it; hopefully, and what are the pros and cons of the egr delete? Right now the hose is being a sever pain in my ass, and i'm tempted to just cut it and cap it.
Lastly, I have the oil feed and return lines, and the coolant return, but where does the coolant feed line for the turbo come from? I assume its near the thermostat where the lines to the heater core and tb are. How are your lines run to the turbo, as of right now it looks like I would have to T off of something? I suppose I could put a T in where the coolant sensor is and run it from there.
Thanks,
Jon
TGP's did not come with AIR pumps, as they only came on cars with manual transaxles and all TGPs came with automatic transmissions.
scrap the AIR, keep the EGR (it's really not hurting anything).
The coolant feed comes from a split in the waterpump bypass pipe that leads over the front valve cover. you could probably T it over near the thermostat but it gets awfully close to the crossover pipe over there.
I had my lines mixed up. It seems I have the feed line then. It's the line that comes from the water pump, T's to the heater core and then down and across the valve cover. It has a connection coming off of it near where the passenger dogbone is. In this case, where does the return line go? Any downsides to killing the AIR pump?
the return line spawns off a fitting on the block near the oil filter, under the coil packs. I can't remember exactly how it's set up but it goes through the oil cooler first before going back into the block I think.
anyone have pictures of the hose setup down there? i can't remember how it's supposed to be routed.
The left side of oil cooler gets T'd in between the Heater core hose and the thermostat bypass (there is a stock T pipe on TGP motor). The right side of cooler T's into the turbo (return) and then goes right back into the block. Anyone?
i'm not 100% sure, but i think the return line is actually the line that goes across the top of the front valve cover.
coolant feed line - comes off the waterpump to a 'T' fitting. one side goes to the heater core and the other side goes down to the oil cooler. after it goes through the oil cooler, it goes to another 'T' fitting. one side of this 'T' fitting goes to a restrictor fitting that is threaded into the cylinder block, and the other side goes up to the turbocharger (bottom of turbo).
coolant return line - comes out of the top side of turbo, crosses the engine above the front valve cover and meets another line that is returning coolant from the throttle body heater. this goes into the top of the water pump.
oil feed line - comes out of the block above the oil filter adapter. for the first 6-8" it is a braided hose but then threads into a solid metal line. it goes right up to the top of the turbocharger.
oil return line - the larger line coming out of the bottom of the turbocharger. it is a pipe that goes into a ~12" long section of hose that meets a pipe coming out of the oil pan.
I only have 2 connections to my water pump that I can see. One large one that goes to the radiator, and one for the throttle body send/return, depending on how that pipe flows, that goes to the heater core. I'm just confused because it sounds like the send and return both come from the water pump?
yup, both the supply and return go to/from the waterpump (the top of the waterpump). there is one pipe that comes in from the turbo and throttle body heater, and then on the other side you'll see how it sticks out and goes to the heater core. the TGP has a 'T' right there where the actual heater core line connects. from that 'T' there is a TGP specific pipe that goes down to the front side of the engine (to the TGP-specific water-to-oil cooler). since your car is not a TGP, you may not have these. my Cutlass didn't; i had to get them from the Turbo STE i used as a parts car. if you don't use the TGP water-to-oil cooler you would have to figure something else out which shouldn't be too hard. hth