I think it would be reasonably easy to install a set of twins on a TDI. It is transverse mounted and there is loads of room between the charger and the firewall. You'd have to consider torque rattle (don't want to bump the wall!) but if we could find a set of matched chargers for that kind of low boost application (under 50 psi), build the piping out of flex tubing or even psi rated heater hose similar to that of the stock IC piping, use real boots and clamps it should work.
We would need to look at gauges for sure. Like any real TWIN system you will need 3 boost gauges. 1 after the first Turbo, 1 after the second and 1 after the IC. I don't think you'd be able to get beyond 60 psi in a 1.9L but maybe you could? Then we'd need to consider a real intercooler - probably have to modify a BD unit to fit but the width might be too much for a FMIC. Then gut the EGR, port the manifold, headstuds, cam and lastly I think we'd have to consider an AWL transmission to keep the power to the ground because the torque steer would be out of this world.
My guess is that a 1.9L TDI with TWINS would move 38 to 48 pounds of boost max, would see 350 ish HP at the wheels (yes I'm serious)
and around 650 to 750 pound feet of torque. Sure, the stock tranny would not match this and we'd need to talk with Southbend to make a clutch that would handle that power as well as fit inside but I really think it is doable.
Of course, fueling would be an issue and injection, timing and fuel delivery would be a major consideration. Could probably modify a small FASS unit to deliver the fuel to the injection pump and you would want at least stage 3 injectors in the block for an increase of around 80 to 90 HP for sure.
Lastly, we'd need add a BIG FAT Arrowsmith Diesel Performance decal to the car for a HUGE power increase, 'cause everyone knows that each decal is good for like 5 HP dude!
My thoughts on the CR version would be to stay away. CR trucks are problematic when it comes to add-ons especially when you start advancing the timing and increasing the rail pressure. Not sure what the rail pressure is in the new CR TDI but say the Dodge is around 27,000 and when it gets up over 30,000 psi things start to act really funny. The PD is likely the go between version but a 2003 (like my car, a normal TDI) would probably be the best bang (no pun intended) for this task.
jetta-girl said:
The guys I race with have spent hours with me figuring out how to fit some twins in that small engine bay. If you have any ideas, please let me know, I think it would be cool, especially if there is a way to keep the boost up between shifts.
I've also been trying to figure out a way to get nitrous set up on my car in a way that I can still be consistant...but with my car being a stick shift, there are too many variables. I think it would be so cool to stage next to one of the trucks and bleed the nitrous lines... Psh Psh
That would totally throw them off their game...LOL
I think I'll be trading in my car in the next year or so to get one of the CR TDI's. Way more modifiable. And probably cheaper to modify than my PD, do you think?
Anyone want to buy a 2006 Jetta? It's been
babied and has low miles.
LOL