2L diesel swapped 1986 4Runner (5 Viewers)

[4Ruster]

I just did this temporarily. It builds 1.5psi in 4th at 2000RPM just cruising up a slight hill. Not bad. All you hear though is the exhaust leak so I'll try to weld it once it stops raining later.

 

[4Ruster]

After a week I've noticed a few times where I'm trying to accelerate up a hill and I'm just blowing black and not building more then 2-3 psi. Any input on this issue?

 

[mcaz5]

After a week I've noticed a few times where I'm trying to accelerate up a hill and I'm just blowing black and not building more then 2-3 psi. Any input on this issue?

Your timing has to be too far advanced. Mine builds 2-3psi basically with any throttle input and builds 20psi on hard acceleration with EGTs peaking at 1200-1250F

 

[4Ruster]

Your timing has to be too far advanced. Mine builds 2-3psi basically with any throttle input and builds 20psi on hard acceleration with EGTs peaking at 1200-1250F

Oh 9kay that could be the case. My pump is pretty far tilted. What does your pump look like?

 

[mcaz5]

Yours looks to be a quite a bit more advanced than mine for sure.

I usually use the top left bolt(from this view) as a reference point to the bolt for the throttle. You can see what I mean in the second picture

 

[4Ruster]

View attachment 3424489View attachment 3424490Yours looks to be a quite a bit more advanced than mine for sure.

I usually use the top left bolt(from this view) as a reference point to the bolt for the throttle. You can see what I mean in the second picture

Thank you that is very helpful to get a baseline! Yeah wow my pump is way too advanced.

 

[mcaz5]

Thank you that is very helpful to get a baseline! Yeah wow my pump is way too advanced.

No problem! Mine is also advanced as well from what the FSM calls for, for the 2LT

 

[bj70bc]

advance, turbo, and IDI compression ratio isnt good for the crank....

 

[4Ruster]

I pulled the timing back quite a bit. Put my foot down and i got up to 10psi, that's when the wastegate opens, so she's definitely running better. EGTs are still a little high but I haven't gone above 1000⁰F yet.

 

[4Ruster]

I have a bad spool leak though on the bottom of the turbo. Then again I don't have a gasket, ones coming in the mail, hopefully that'll solve that issue.

 

[bj70bc]

anything below 1100 is totally safe

 

[4Ruster]

Well after tinkering with the timing a bit, it runs nice. Spools early, it doesn't build more then 3 psi unless I'm really pushing it, but I can get it to hit the wastegate at 10 psi. Normal driving I see around 1-3 psi. I still have a bit of a spool leak so I've been driving with the windows down until I can get a gasket in.

I was messing with the boost compensator on the bench, I plan on putting it in this weekend.

The star wheel is turned about 90% of the way in, I'll leave it like that for now. A weird thing I noticed, the governor spring is this weird looking thing

On my current pump top, it's just a simple spring. Do I need to use this crazy contraption or can I just pop my throttle shaft out and use the other spring setup instead?

 

[RyanMiller]

that govner spring looks like its not right... I remember in the VW 1.6's people would take a spring out and put a shim.. but it makes it very very smokey.
heres a thread with some photos DIY Governor Mod (pic intensive) - https://www.vwvortex.com/threads/diy-governor-mod-pic-intensive.3107325/

 

[4Ruster]

Hmm yeah I think I'll just use my other spring. Looks like this one

While I have the comp out still, I've heard of people grinding the pins for a more aggressive fuel ramp. Opinions on that?

 

[KiwiDingo]

Hmm yeah I think I'll just use my other spring. Looks like this oneView attachment 3426755

That spring is 100% a backyard job. You should return and get your money back to who ever built and calibrated that pump. With a spring like that installed I'd be seriously concerned about the parts used and the calibration of the rest of your pump. Where'd you get this pump from?

 

[4Ruster]

That spring is 100% a backyard job. You should return and get your money back to who ever built and calibrated that pump. With a spring like that installed I'd be seriously concerned about the parts used and the calibration of the rest of your pump.

Yeah when I first ran the pump with the boost comp on the throttle was terrible. Bought it on eBay from the UAE. Gave them a negative review after having to get them to mail me THE REST OF THE PUMP and they wouldn't stop pestering me for weeks. I had to take the pump body to a shop to get them to recalibrate it.

 

[GTSSportCoupe]

I wouldn't mess with a more aggressive fuel ramp if I was you. There is lots of adjustment opportunity on the factory pin.

Is your pump a 9mm or 10mm plunger? Can you post a picture of the part number tag?

 

[4Ruster]

Thats the fun part. I don't actually know the part number. Heres the listing, DON'T EVEN THINK ABOUT BUYING ANYTHING FROM THIS SELLER. The pump came without a tag. I assume it's just a standard 9mm 2LT pump. Is there any way to tell without taking it apart?

 

[4Ruster]

 

[4Ruster]

Also. Looking through my photos, I found 1 terrible picture of the inside of the altitude compensator.

It looks like I might actually be able to swap the top internals without having to pull the pump to switch over to the boost comp. I might take the cover off tomorrow and see if the housings are the same. Would save me a weekend of finagling with fuel screw settings again.