Turbo y-pipe Measurements?

[nate2023]

Any of you turbo v6 people out there, does any of you have measurements or blueprints of a turbo Y-Pipe and downpipe to keep the stock manifold. My car is my Daily driver so i cant really pull the motor to take measurements and fit one. or if you know where i can get one, i have a dodge turbo laying around just needs an external wastegate and BOV. Thanks for you help.

[nate2023]

i guess i'll hit the JY and get a motor to play with

[silvergtjrad]

As far as I know, most people cut up their stock crossover and use the flanges from that for a y pipe between the two manifolds. You also have to block off the rear manifold where the stock downpipe would be.

[angrysk8r]

^pretty much exactly what I did, except I replaced the rear 3400 manifold with the 3100 rear manifold to promote flow toward the crossover.

How I did it was to clamp the stock crossover flanges to the front and rear manifold, then taking prebent exhaust piping I kept tacking and cutting small pieces of the piping at a time. Once I reached about where I wanted the turbo, I checked to make sure the turbo bolted on with no problems and had the necessary hood clearance, then proceeded to make the final welds.

[nate2023]

thanks this is a big help, i also read somewhere about the rear 3100 manifold, the ports arent smaller or anything i would have a problem with it not maching and overheating?

[angrysk8r]

I haven't had any problems yet, and it directly bolts on to the head without modification (well of course you still need to chop/block off the rear dp connection for the turbo application). The only real difference is that the rear 3100 manifold is more of a "log" style like the front 3400 manifold, while the 3400 rear manifold more promotes flow toward the dp with the somewhat more angled ports.