Looking for specialists. Renault 1.9 TD, 1994, inside a Volvo

Two weeks ago, I bought a Volvo 460 TD, model year 1994, for my girlfriend.
He has the Renault engine with 90 horsepower and an intercooler.
Now, I wanted to make it a bit more lively, so I looked for tuning options. It used to be a piece of cake with the old VW/Audi turbodiesels.
What I've found so far is that the boost pressure is being increased via a linkage from the turbo, and the full-throttle engagement is being controlled by the fuel injection pump.
I'm still not entirely sure which way I need to rotate the turbocharger to increase the boost pressure.
I would be very interested to know if there is a pressure-controlled cone, as with VAG engines, for regulating the injection quantity, and where the bypass valve for limiting boost pressure is located.

I hope someone here knows something about this fan merchandise;o)

Tagessuppe wrote:

I bought a Volvo 460 TD, model year 1994, for my girlfriend two weeks ago. He has the Renault engine with 90 horsepower and an intercooler.

Aaah, the is from Renault. My parents also have one, but the engine is not a VW... I've never really looked at it closely, let alone tried to attach it.

Quote:

Now, I wanted to make it a little more lively, so I looked for tuning options. With the old VW/Audi turbodiesels, it was quite simple.

That's exactly the same thing. The engine has a Bosch fuel distributor with a turbocharger pressure sensor on top.

Quote:

What I've found so far in this is the boost pressure increase via the linkage from the turbo, and the full-throttle engagement from the fuel injection pump. I'm not entirely sure yet which way I need to rotate the turbo

to increase the boost pressure.

You need to adjust it so that the rod becomes shorter, which will cause the bypass valve to open later. Alternatively, you could attach an old brake spring in parallel, which would require the membrane to overcome a greater force and open only at a higher pressure. Or, you could drill a hole in the control line. Generally speaking, a pressure gauge is useful so you can check what's happening.

Quote:

I would be very interested to know if there is a pressure-controlled cone, as with VAG engines, for regulating the injection量, and where the bypass valve for limiting boost pressure is located.

At the top of the ESP is a cover held in place by 4 screws. Underneath that is a rubber membrane with the mysterious control cone attached (which you can pull upwards). The cone is eccentric; if you install it so that it's as far away from the camshaft wheel as possible, it provides maximum enrichment. To prevent excessive smoke, the turbocharger pressure must be correct.

Before you do all of that, try increasing the fuel flow a bit (take a test drive, check the power delivery and soot production, pull over to the right, make adjustments, etc.). If necessary, you may need to adjust the idle speed and remaining fuel afterwards.


Best regards, Uli.

Uli S. wrote:

That's exactly the same thing. The engine has a Bosch fuel distributor with a turbocharger pressure sensor on top.

Hi Uli. Are you sure? I searched like crazy yesterday, but I couldn't find the boost pressure sensor. There's a suspected boost pressure hose running from the turbocharger, which is tapped into approximately three times by smaller hoses.

Quote:

You need to adjust it so that the rod becomes shorter, which will cause the bypass valve to open later. Alternatively, you could attach an old brake spring in parallel, which would require the membrane to overcome a greater force and open only at a higher pressure. Or, you could drill a hole in the control line. Generally speaking, a pressure gauge is useful so you can check what's happening.

Wow. That tip about using a feather is a good one. I'll try that, if adjusting the tie rod doesn't improve things enough.

Quote:

At the top of the ESP is a cover held in place by 4 screws. Underneath that is a rubber membrane with the mysterious control cone attached (which you can pull upwards). The cone is eccentric; if you install it so that it's as far away from the camshaft wheel as possible, it provides maximum enrichment. To prevent it from producing excessive smoke, the boost pressure must, of course, be correct.

I'm going to take a closer look today. I think the ESP is probably a different brand than Bosch, because it looks completely new to me. However, I suspect that if I follow the boost pressure hose, I'll be able to find something to adjust.

But since they sealed the full-load bolt, I think that's the solution to the riddle.
I'm already curious to see how the car will handle with more power.

Thank you again for the great tips!

Oh yes, and for your T3, I can only recommend an oil cooler.
Sure, here's the translation:

"Zb von Bernd Jaeger." It significantly extends the lifespan of the engine.

Tagessuppe wrote:

Uli S. wrote: That's exactly the same thing. The engine has a Bosch fuel distributor with a turbocharger pressure sensor on top. Hi Uli. Are you sure? I searched like crazy yesterday, but I couldn't find the boost pressure sensor. There is a suspicious high-pressure hose coming from the turbocharger, which is tapped into approximately 3 times by smaller hoses.

Oh dear, that sounds like it might be a Lucas/Rotodiesel/CAV pump. I have no idea, I don't drive cars like that (they usually give in very quickly to pressure ).

Quote:

But since they sealed the full-load pressure screw, I think that's the solution to the riddle.

That also sounds like something Lucas would do. Bosch pumps don't have that, at least not the ones I've seen so far. They just use these little yellow spots of filling material as a sealant.

Quote:

Oh yeah, and for your T3, I can only recommend an oil cooler. Sure, here's the translation: "Zb von Bernd Jaeger." It extends the life of the engine considerably.

Thanks, it's already at home (GTI flange and BMW 325i radiator ). It's not really critical right now because the thermostat is broken and the water only gets to 70°C . As long as you drive at a cruising speed of 110 km/h, the oil won't get really hot. More important is the intercooler (also at home). Actually, I want to install an AAZ engine (it's in the barn...), but then the next thing to fail will be the transmission (AAZ with intercooler means 250 Nm for me), so I need a Renault transmission like Maciek's (I don't want to give Frank €1700 for a reinforced/extended van transmission), which will be another project. No time for that right now... So, we'll just keep driving the original JX for now. For heating, we still have 3 other vehicles .

Best regards, Uli.

Uli S. wrote:

Thank you, it's already at home (GTI flange and BMW 325i radiator ).

Since I've already found a professional, I'm going to get a little bit of everything out of you .

I actually have a T3 air-cooled bus with a 1.6 CT engine. It comes with an oil cooler as standard, but it seems a bit undersized. And the 380 euros they're asking for the oil cooler replacement seems a bit too much to me.

Can I tap into the oil cooler somewhere other than at the oil filter?

Do you happen to know of a wide (about 40cm) and low (about 20cm) oil cooler that would fit in the front of my grill? I don't have a lower grill for the water cooler; I have one for the top.

Please don't scold me because mine is not a diesel . I received it as a gift.

Please stick to the topic and discuss other matters via private message or in a new thread.

CU Gremlin.