hey guys ive got some dumps lying here, and dont want to install them the way they are so im going to mod them to what i think should be a sweet arse dump... i have already considered just buying them already made up, but meh id like to mod these and i dont see it as a hard task at all, pretty simple really... i just need some advice if im doing this the right way... ok these are the dumps. so what im thinking of doing, is cut where the black line is, blank that area up and weld it up etc... then with the remaining wastegate pipe, legnthen it the way i want it and join it much further down in the large 2.5inch pipe... offcoarse the 2.5 pipe in the dump as seen will also be extended, so i will grind off the flange and continue its path.... so my question is, iff i just cut it as seen and blank that area up, weld it up etc, will this be sufficient enough or will it disturb the flow/turbulance etc etc.... thanx in advance
yeah you could do it that way but i think you would probably be better cutting the flanges off and making new pipes
sounds like you are trying 2 reinvent the wheel . if you looking for performance gains there really isnt gonna be much difference between the stock tune agent/megan racing and your system you are looking at. unless you go for some bigger turbos there is only so much you can do with stockies .. im assuming your using stockers as the dumps in question are the 4 bolt kind
i wouldnt bother putting these in the way they are, they just dont have enough split to really do anything different. the split should be alot further away so by the time they both reconnect the turbulance is lost. mehhhh im not really interested in spending big dollars for some dumps, using stock turbos. so ill just mod these... ye i thought about this...i think ill atleast leave the first bend, so its either i will do as i thought of as above orrrrrr i could cut the pipes somewhere after the first bend, and make a new pipe from then on...i was thinking would there be a difference with doing as in the picture, or making a new pipe after the first bend...new pipe would look better, but would it make a difference inside, would the flow be affected differently etc? or same shtt
yeee bugger it, i aint going to do what i mentioned before... this is now what i will do...what you guys think? in this pic the dumps will be pretty much similiar to the ones on the left. as you can see the dumps i have on the right, will be cut at the line, after which will continue piping work in the same format as the pic to the left. they will both re-inter the large pipe just like the one on the left. does anyone know what the optimum legnth is to keep the pipes split for????
I agree with the above point made, just make your own from scratch and quit trying to cut up perfectly fine dump pipes lol Just my 2c!
Yeah, making your own from scratch is easy peasy... It only took me 3 whole weekends to make them up. I just love getting up and down from under the car, checking every bit before it's welded, what a serious pain in the ass. If I could've bought 5 bolt dumps with external wastegates at the time, I would've paid $1000 for them to save the hassles of making them up. And you're looking to make maybe 1 or 2kw from all that stuffing around, maybe???
ye with these ones, the main pipe is slightly larger than the wastegate pipe. i just came back from my exhaust place, and they quoted me about $200 for what i want to do. i think this is pretty good considering the same style dumps that id like to do are about $1000. what they are going to do is cut the pipes as shown in the last pic, and continue the path for as long as i want and rejoin etc just like the dumps in that last left pic.... any1 know what the optimum legnth is to keep the pipes split for?
yeah thats a pretty good price. to answer the question about pipe length. as far as i know, optimum pipe length will vary from car to car. so i cant tell you and i dont think anyone else will be able to give you a measurement. the advice i would giev is to use a big turbine pipe, and focus on where and how the wastegate pipe rejoins the main exhaust flow and keeping the bends as shallow as possible.
ye i guess im going to tell him to rejoin them between 2foot and the cats. the pipes will rejoin exactly the same way that dump on the left is, same join. thanx for the advice
pic excuse the very basic sketch . IMO the design on the right is more favourable as the main exhaust flow takes priority over wastegate gases and enters at an angle that it will not upset flow. the design on the left is th eone i thought you were going to use
ahh ye i get ya, so that design with be better than both these designs (the way it re-enters the pipe)... if it is better i can tell him to do it. i rather do everything the best first time round...
