RRM Turbo installed/completed
Feb 23, 2010, 09:27 PM
#564
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but it wasnt 3" mandrel, so it was fine for our application, thats why I got it. adding the exhaust alone made 40 whp more you know.....and who cares about loud??
Feb 23, 2010, 10:04 PM
#566
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2 1/2 is plenty for 10 psi ish. 2 1/4 is even better for our setup. Too big and you get boost creep. Boost runs away past where you want it to be and then you know what happens.......
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ROAD/RACE
Feb 24, 2010, 08:12 AM
#567
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but in my case it was a 10 lb spring and crappy custom made (not by me) wastegate bracket holding it on. the bracket held the wastegate at a weird angle so the rod rubbed up against it, causing it to stay open very little at idle. I thought it was the wastegate not being tight enough, so i tightened it, etc, etc, and then used the MBC to stabalize the boost. if I would have known that the bracket was causing the sticking open problem, I would have stopped everything and waited to retune until I could get a new bracket made. now, I have a new bracket (made by me this time) and the rod has a straight shot to the flapper arm, and a 5 lb spring this time, so all is well when i re-turbo, hopefully this summer. birthday is this weekend so we'll see what kind of cash I get! haha
oh and it has been confirmed that the dyno I got tuned on had a messed up AFR reading, because EVERYONE that got tuned that day was running way lean on the streets, so that was the other problem haha
Last edited by yitzac1990; Feb 24, 2010 at 08:20 AM.
Feb 24, 2010, 09:58 PM
#568
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I was not referring to you, Yizac. I was referring to guys wanting too large of an exhaust. A good wastegate setup can still have a case of creep if the exhaust freewheels the exhaust side too much. Word to the wise regarding exhausts!
ROAD/RACE
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