I'm going to get a tune pretty soon... I have all the hardware I need to tune for stage 4. I'm also looking to pick up a delivery pipe from GS. Would I see any decent gains with adding the delivery pipe? GS recommends using this when over 300hp. What do you guys think? worth purchasing?
Even Nick says there is a better place to spend your money...
They look nice, but don't really do much.
I built my own, with the 3" elbow and the boost hit is smoother, but it does not feel any more powerful. I had the tubing already, and just had to buy the couplers and clamps.
I guess you missed the big test Vigge did on this? Do a search, every aspect was discussed! Basically it causes the power or torque to hit a little later and robs a little torque and really does not give much of a gain on the top end.
If you have issues with the turbo hitting too hard, it can be a good way to make the power more usable by having it hit a little more gradual, but it does not really offer any gains at the 350hp range.
Nick tested ss pipe on his viggen and noted it heat soaked much faster than the plastic stock delivery pipe. So for him it was a loss in hp....
I have my std alu pipe intact and the car is proven to make 500+hp with it.
Tried a 2.5" aftermarket model, but found only negative gains with it and went be to the std pipe including the last cast bend.
Agreed with everyone above - I have sqr stage 4 and heat soak is a nightmare - my next investment is definitely an intercooler. Great fun on cool nights though... you will love it.
If anything, you can take off the last cast bend and if you look at the where the final coupler connects to it, there is a large casting wall that doesn't line up. Take a dremmel to smooth out that transition. It helped a minor amount but it was free. Not sure if anyone ever proved it actually did anything though. I will try to grab a picture.
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