Downpipe - Toyota Nation Forum : Toyota Car and Truck Forums

MR2-Good-4-u · 03-22-2006, 09:28 PM

I got my manifold and downpipe tuesday

. And it looks great............. so i didn't have to go to work so i decided to start taking everything apart at about 5 o'clock and i must say i have never done anything that hard in my life. But at 11 i got the downpipe on and bolted the exhaust on and took off......i noticed that my boost had increased to 18 psi and it was going like hell... i had the boost controller set at 15 so i pulled over and decided to turn the boost down to take it easy on the turbo so i turned it down to 15 again but usually i hit full boost at about 3800 and now i was hitting full boost at like 5500 and it takes all day to get there.. i have no idea what is going on. My guess is that i have a boost leak somewhere???? please help.

***MR2Jedi*** · 03-22-2006, 09:51 PM

prolly exhaust leak . letting exhaust energy bypass the turbine.

MarylandMr2 · 03-22-2006, 10:30 PM

i had the same problem when i put my downpipe on. what kind of boost controller are you using?

Piddy · 03-22-2006, 11:20 PM

Glad to hear you got it and got it installed

. Send me some pics.

MR2-Good-4-u · 03-23-2006, 01:38 PM

I have a hallman boost controller.. an exhaust leak would do that?? well i will check it out thanks!

MR2-Good-4-u · 03-23-2006, 08:03 PM

I talked to one of my friends who know mr2s and he said there is a lever on the turbo and if i knocked the clip off of it when i was putting the downpipe on then that would cause the lever to open at the wrong time and that would be the reason why im having boost problems.