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760 help me be cool?? build-a-brick

N

nickvolvo746

Member
Joined
Nov 13, 2017
Location
New Jersey
1990 760 turbo---302,000 miles, still pretty good though.

Just another noob trying to make his antique go vroom.

Below, I have an outline for my not so master plan for what I want and need to do to my car to ensure it has a healthy life. I am particularly interested in what yall will think of the turbo and transmission idea I have at the bottom, but any input here would be greatly appreciated (and I already look at every post I can for guidance, I am simply trying to be less of a noob and maybe some of you learned folk out there enjoy schooling kids like me). Tell me what to do, what not to do, tell me im an idiot, show me your ways!

In college right now so there is no chance of working on the car until may, so I want a nice plan of action.

WHATS ALREADY BEEN DONE (very short list, its embarrassing)
-Boost gauge
-calipers, pads, rotors in the front
-stupid but nice wood panel for the spare wheel hatch
-swapped out powered leather seats with manual cloth
-fixed radio antennae
-fixed seat belts
-


What I plan to DEFINITELY do and probably should do over the summer:
-new spark plugs (good ones)
-as many new hoses as possible
-new air filter, get rid of the box and put on a cone
-blow off valve for cool noises (already got one from my other car so no money spending here)
-coolant flush
-ATF flush
-sea foam the entire thing and then do oil change (will take off cat for this, I hear they can get clogged with carbon, also I wanna hear it scream)
-also oil cooler flush
-reinstate my manual boost controller (ran into some problems where the boost would cut, likely due to bad hose, not enough fuel, not really sure, like I said, noob
-install wideband sensor
-brake fluid change
-pads+rotors
-blower fan for AC/HEAT
-check turbo for signs of wear/play (relatively new turbo stock turbo, around 20-30k on it now)
-find and fix oil leak or leaks

What I plan to MAYBE do, but perhaps should not bother with:
-fix sun roof (currently gets stuck), possibly make it manual crank?
-add a light bar or other LED lights somewhere discrete to add visibility at night
-upgrade turbo (I already have a mitsu 16g that is on my 740 (it might need a rebuild, we shall see), along with the manifold and a downpipe, but no exhaust system yet. Im in Jersey so I dont need a CAT and honestly I might just straight pipe it for a little while)
-take out fuel pump and check it out, maybe clean it if need be
-new injectors
-switch to better tranny (I have one on my 740 that was from an NA car (sorry, no clue what model it is, but it is auto and has the whole 4 gears and then that extra "gear" for lower rpms on the highway. it is also pinned so as to shift faster and save the clutches. I will probably take the pin out of first gear cause theres no point in it clunking the way it does from park or neutral, but its nice for the rest of the gears.
-new tune (much more research needs to be done for this one, I have zero clue how the ECU works its magic, if you know a good thread that will teach me please refer me


If you read all this, youre a baller, I love you, and you also have almost as much time to kill as I do so high five mate! (why is my winter break so long)

Cheers!
 
nickvolvo746 said:
1990 760 turbo---302,000 miles, still pretty good though.

Just another noob trying to make his antique go vroom.

Below, I have an outline for my not so master plan for what I want and need to do to my car to ensure it has a healthy life. I am particularly interested in what yall will think of the turbo and transmission idea I have at the bottom, but any input here would be greatly appreciated (and I already look at every post I can for guidance, I am simply trying to be less of a noob and maybe some of you learned folk out there enjoy schooling kids like me). Tell me what to do, what not to do, tell me im an idiot, show me your ways!

In college right now so there is no chance of working on the car until may, so I want a nice plan of action.

WHATS ALREADY BEEN DONE (very short list, its embarrassing)
-Boost gauge
-calipers, pads, rotors in the front
-stupid but nice wood panel for the spare wheel hatch
-swapped out powered leather seats with manual cloth
-fixed radio antennae
-fixed seat belts
-


What I plan to DEFINITELY do and probably should do over the summer:
-new spark plugs (good ones)
-as many new hoses as possible
-new air filter, get rid of the box and put on a cone
-blow off valve for cool noises (already got one from my other car so no money spending here)
-coolant flush
-ATF flush
-sea foam the entire thing and then do oil change (will take off cat for this, I hear they can get clogged with carbon, also I wanna hear it scream)
-also oil cooler flush
-reinstate my manual boost controller (ran into some problems where the boost would cut, likely due to bad hose, not enough fuel, not really sure, like I said, noob
-install wideband sensor
-brake fluid change
-pads+rotors
-blower fan for AC/HEAT
-check turbo for signs of wear/play (relatively new turbo stock turbo, around 20-30k on it now)
-find and fix oil leak or leaks

What I plan to MAYBE do, but perhaps should not bother with:
-fix sun roof (currently gets stuck), possibly make it manual crank?
-add a light bar or other LED lights somewhere discrete to add visibility at night
-upgrade turbo (I already have a mitsu 16g that is on my 740 (it might need a rebuild, we shall see), along with the manifold and a downpipe, but no exhaust system yet. Im in Jersey so I dont need a CAT and honestly I might just straight pipe it for a little while)
-take out fuel pump and check it out, maybe clean it if need be
-new injectors
-switch to better tranny (I have one on my 740 that was from an NA car (sorry, no clue what model it is, but it is auto and has the whole 4 gears and then that extra "gear" for lower rpms on the highway. it is also pinned so as to shift faster and save the clutches. I will probably take the pin out of first gear cause theres no point in it clunking the way it does from park or neutral, but its nice for the rest of the gears.
-new tune (much more research needs to be done for this one, I have zero clue how the ECU works its magic, if you know a good thread that will teach me please refer me


If you read all this, youre a baller, I love you, and you also have almost as much time to kill as I do so high five mate! (why is my winter break so long)

Cheers!
Click to expand...

I'm thinking you're not going to do any better than that stock air box. The oil cooler is supposed to be drained at every oil change, you'll find fitting disconnects are provided for this under the front of engine. Straight pipe? My 88 765 Turbo wails at interstate speeds with 2.5 inch exhaust with 18 inch long oval shaped straight through muffler at the rear. With 14 inch rear muffler the exhaust was deafening. I'm an old guy, so I'd guess the exhaust is even louder than I realize. Don't need catalysts on a car this old in my area either.
 
Last edited:
If the cone shaped oil saturated air filters did what they say they do manufacturers would have converted long ago.

My son bought a new F150 and spent a couple hundred converting to 'cold air cone oil saturated filter'. Results were 0.0% minus what he spent.

I got to say TYS.
 
tintintin said:
I believe that is called "Overdrive." ;-)
Click to expand...

yo I promise its something else, I forget what its called, my buddy explained it to me. I think someone below mentioned it, something about "lock up". He said it was from an NA car, but it will go through all 4 gears and then it drops into a 5th stage. so when I press the overdrive button, sometimes you can essentially hear it shift twice, rather than just once.
 
my kinda guy, you commented on the other thread I posted, I realized after posting this one that I did it in the wrong section but since more people have been commenting here I just let it roll. I probably wont cut the springs though, had that in my other 700 series and it kinda sucked
 
TestPoint said:
If the cone shaped oil saturated air filters did what they say they do manufacturers would have converted long ago.

My son bought a new F150 and spent a couple hundred converting to 'cold air cone oil saturated filter'. Results were 0.0% minus what he spent.

I got to say TYS.
Click to expand...

thanks for the input there, ill probably leave it as is
 
lummert said:
I'm thinking you're not going to do any better than that stock air box. The oil cooler is supposed to be drained at every oil change, you'll find fitting disconnects are provided for this under the front of engine. Straight pipe? My 88 765 Turbo wails at interstate speeds with 2.5 inch exhaust with 18 inch long oval shaped straight through muffler at the rear. With 14 inch rear muffler the exhaust was deafening. I'm an old guy, so I'd guess the exhaust is even louder than I realize. Don't need catalysts on a car this old in my area either.
Click to expand...

yeah I am pretty used to the noise from my 740 wagon cause it had a hood stack, it was honestly a blast to hear the turbo spooling up so audibly, but it definitely wasnt nice on longer trips if I had folks in the car. By myself is no trouble though. And thanks for the input on that airbox and oil cooler, I appreciate it!
 
nickvolvo746 said:
yo I promise its something else, I forget what its called, my buddy explained it to me. I think someone below mentioned it, something about "lock up". He said it was from an NA car, but it will go through all 4 gears and then it drops into a 5th stage. so when I press the overdrive button, sometimes you can essentially hear it shift twice, rather than just once.
Click to expand...

That is called a lock up torque converter. The transmission is an AW71L. L standing for lockup.
 
From what I've read the AW71L needs to be in overdrive for lockup to engage. Pressing the overdrive button locks out overdrive. Locking out the overdrive is useful for towing or for driving in mountains.
 
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