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Forum nameTurbo/Nitrous Tech
Topic subjectDownpipe Leak question
Topic URLhttps://forums.2gnt.com/dcboard.php?az=show_topic&forum=i8&topic_id=61674
61674, Downpipe Leak question
Posted by freddy_00_69, Dec-02-03 05:55 PM
I am boosting now, will out any problems, but have a question. In 1st gear i go up to 5psi and then 2 and 2rd gear i get the boost i have set which is 7psi. I have a big leak around my downpipe connection to the turbo b/c it is just a custom one. Also, i spool up very late like around 4000rpm with my super 16G. That is the only leak i have. Fuel is good, and ic pipe is all connected tight. What could cause my late spool up and only getting 5 and not 7psi in first. I will be installing the hrc 2.5 hrc downpipe i bought from XtremeRs this week, so just wondering what is my leak causing. Thanks
61676, RE: Downpipe Leak question
Posted by tim97rs, Dec-02-03 11:59 PM
do you have an IC? you could get pressure drop from an IC.
Also if you have a leak at your DP, depending on where it is, it essentialy acts as a partialy open wastegate by allowing your exhaust to bleed out before putting all its force behind spinning the turbine!

leak=power loss!
61677, RE: Downpipe Leak question
Posted by PowerEclipses, Dec-03-03 12:08 AM
IMO take things one at a time and see if this is the problem. Which im 85 percent sure it is your downpipe. I used to have an exhaust manifold leak and I felt some nice power loss when i had my stage 2 turbo. ICs dont drop that much psi. Unless its really a bad one
61679, RE: Downpipe Leak question
Posted by freddy_00_69, Dec-03-03 01:55 AM
Thanks guys, i appreciate the suggestions. I do have a front mount intercooler. I was also thinking about the leak being like an open wastegate but wasnt sure. I am still learning more about turboing our cars. Hey powereclipse, like the car with the cf hood. My car looks just like yours except it has projectors and gunmetal rims.