1641 Turbo EFI Manx. 250Hp/337Nm Turbotub

[rubenski]

Yess, but it would be easier and compacter to connect the turbo outlet to the charge pipe. Without the tb in between i can mount the turbo lower and much less bends...

So the bov between the tb and turbo?

Of between turbo and chargepipe?

Throttle cable, not worried about that.

[Chip Birks]

Draw through doesn't experience the compressor surge that blow through does. You don't create a wall in front of that high pressure air. Instead you just close off the flow. There is a reason blow through cars have blow off valves and draw through cars don't.

[rubenski]

Also with efi?


Why dont i see tb before turbo often?

Are there cons?

[petew]

Most draw through cars don't have blow off valves because they're carby. You'd be venting raw fuel air mixture right into the vicinity of a hot engine. I.e. An explosion waiting to happen.

Compressor surge is cavitation. Whether you stop the air on one side or the other the effect is broadly the same. In the instance of blow through it's extreme compression. In the instance of draw through it's extreme vacuum. Under about 10psi of boost most turbos are reputed to handle it. However mine started "chopping" with only 6psi.

In answer to your original question. IIRC I think the big advantage with blow through is throttle response. Basically the closer the TB is to the port, the quicker the motor responds when you open it. This is not an issue for supercharged setups with a rootes blower because the boost is instantaneous, but on turbo engines (particularly small laggy engines) waiting for boost actually slows that response down substantially. Check the small capacity F1 turbo setups from the 1980's. They found all this stuff out the hard way.

[petew]

Been thinking about it some more and here are the other benefits with blow through...
1. Mechanical separation between the turbo and the inlet tract. So when the throttle closes, the inlet tract is a neutral environment. Preventing the motor from running on under boost and potentially pinging under a lean charge.
2. This means you can run antilag separate to the inlet.
3. You can flood the engine with fuel off the throttle to cool it down.
4. If the turbo or turbo system fails, you can easily disconnect it and drive home.

[rubenski]

Thanks pete!

Stuff to think about

[madmike]

#3 is the only thing mine won't do and I don't think washing down the cylinders is a good for it?:lol:

[rubenski]

Everyone happy christmas!!!

In our family we pick 1 name every year and buy that person a present. Just cheap 20$ worth.

My mom picked me and i gave as a hint: something for in the garage/buggy.

So my mom got me an air freshned for in the car, but i has no roof/doors and windows

And a cupholder to mount in the ventilation. Wich the buggy also dont have..

And some de-ice fluid for my windshield, also i dont drive the buggy in freezing temps and its stored in my garage

Oh how we laughed....


But since the 24th also is my birthday, one of my best friends made me this:



It was an old blade wich we cleaned up, and as a suprise he made the wooden handle.

Its made out of an old piece of wood wich he found in my grandfathers shed ( who died 2 yrs ago and was a verry skilled woodworker) and the red wood is a leftover from my friends shed who also is a good woodworker!


And to be on-topic again, i also made the brackets in iron for my rear suspension kit. I just need to get it welded now.

Best wishes, Ruben

[terryly]

Good time story Maybe Mom is exercising her superior whit and sense of humor ?? Nice knife I would make a nice leather sheath and keep it in the buggy. But that's the red neck in me
Merry Christmas

[rubenski]

This is how im going to weld the brackets on top:

Left



Right



And then back off for the finished welding and grinding and painting

[rubenski]

Got the brackets tacked by my buddy!

Gonna remove everything and get it fully welded by the guy who re-did my shifter rod.

He is retired and loves to do stuff like that and also, free of charge!

I will post pics of the brackets later

[rubenski]

Top brackets. Will shape the edges round after welding



These are stainless brackets. We tacked it with non stainless wire but my friends father will weld ir properly on the back side, grind the tacks down and re-weld them.

[rubenski]

Dumb me, it wasnt stainless steel....

Anyway, we got it fully welded, i trimmed it a bit with the grinder and now im painting it.

[Udo Airbus]

ah just paint it good , or powdercoat and all is ok

[rubenski]

Got lots done today!

The paint on the brackets was dry and I mounted it all on thebuggy.

I also started bleeding the brakes and filling the new lines with brake fluid.
My buddy came to help with some pedal action. But by the time the reservoir was going empty he had to leave so thats where we ended.

Filling the reservoir is a 2 man job...
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Back to the back





now, how do I set it up?

Do i put tension on it and pull the shock towers towards eachother of push them out?

And same with the rods that go from shock tower to gearboxmount. Push out or pull tight?

My guts tell me to pull everything together.


Anyone got some advice?