your waste gate tube is way to long i can almost guarantee you that your going to have issues with creep.

 

Small update.

Continued with the chargepiping today. The layout is 100% done from turbo to IC. Just some solid welding left to do.
Mounted the intercooler aswell. Also cut the intercooler to make it an easier fit. Will weld it together when im done with all the chargepiping.





Fabricating flanges from 6mm stainless steel is a pain in the *** when you don't have a real pillar drill and hole saw. Used the weld to melt metal off to make a rough hole. Then grinding with a rotating airtool. Very very time consuming. Lucky I don't have to make many more flanges. This one in particular is for the blow off valve.

 

We will see what happens, that might be the case, depends on how much I boost also.

Btw, have you seen any similar solution that proved insufficient? If that's the case, what were the circumstances?

 

well what i meant by that was test the manifold for boost creep and see if the spool up is what you want.. you may need to change the angle of the wastegate tube or mabey legthen the actuall primaries to the flange for better spool or power curve... the manifold looks great but you might need to see how it actually performs before you finish the product.

im pretty sure this is going to turn out great either way... youre idea is a good one... a tubular mani 9 times outta ten will out perform a log mani any day. so youll prolly either pick up power in the mid range at the same boost youre running now, or youll keep the same mid range to peak power with less boost than what you have been running. im subscribed to see how this turns out.

 

Indeed, a longer collector should reduce risk of creep, but its also harder to fit. This manifold is a drop in replacement to the ILP cast manifold. The spoolup I am not worried about. The gt3076 will spool somewhere 4-5k rpm and if I get either I don't mind really. The cast mani setup spooled at 4300-4500 I think.

To see power at less boost is very appealing, thats basically what I am after.

 

Are there any rules of thumb here? Like what happens if the angle is smaller and collector is longer? How do piping diameter affect the setup?

 

Nice work. That manifold is going to flow awesome.

 

well the general rule of thumb (correct me if im wrong here) is that the more agressive the angle for the dump tube the harder it will be for the exhaust to use the exit. that is also where you start to get boost creep from. also if the wastegate is too small it wont be able to expell as much pressure as you may need... same goes for a gate that is too big... you may expell too much pressure and have boost drop... best way to test it is to go with what you have run the car on a dyno and watch your boost curve compared to hp/trq curve.... if it gets irratic then you can tell whats happening...... the only small flaws that i see so far are the length of the dp before the wastegate which i dont think will hurt much of anything, the biggest problem that you would have is the angle of the dp to the collector. try it and see what happens and let us know how it goes k.

 

That mani is going to boost creep like crazy with that WG setup

 

Dump that shit to atmosphere