question about boost
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Diesel Wrench
Joined: Oct 2008
Posts: 556
Likes: 19
From: paris illinois
question about boost
back n the day (last summer 
) i could plug my wastegate and it would build boost very quick if i got on it in like say 3rd gear.. id have to get out of the throttle so it wouldnt build too much boost. stock turbo btw (wh1c). well i took the head off and had it milled .10 then put a .20 headgasket on, put a 3 piece manifold on and headstuds. along with 22.5* timing, it was at 18* b4 pulling the head. anyway i got it back together and hooked the wastegate up like it should b. drove it for a while without much boost, i then plugged the wastegate and i couldnt build boost like i should with it plugged. i thought maybe the wastegate was not working.. so i took the wastegate off and just wired the arm on the turbo in the direction i got the most boost. it builds boost as if it had a wastegate hooked up (30-35psi depending on the gear and my foot) but if it was like it used to b itd b making 50 or 60 (not that i want it to). anyway im just trying to figure out wat happened to make it lose the boost. i have 1 tiny leak at the oring at the mouth of the turbo.. i mean tiny! have tested for leaks and theres no other leaks. maybe the turbos goin south? it sat for a few months on my garage floor while the head was off.
) i could plug my wastegate and it would build boost very quick if i got on it in like say 3rd gear.. id have to get out of the throttle so it wouldnt build too much boost. stock turbo btw (wh1c). well i took the head off and had it milled .10 then put a .20 headgasket on, put a 3 piece manifold on and headstuds. along with 22.5* timing, it was at 18* b4 pulling the head. anyway i got it back together and hooked the wastegate up like it should b. drove it for a while without much boost, i then plugged the wastegate and i couldnt build boost like i should with it plugged. i thought maybe the wastegate was not working.. so i took the wastegate off and just wired the arm on the turbo in the direction i got the most boost. it builds boost as if it had a wastegate hooked up (30-35psi depending on the gear and my foot) but if it was like it used to b itd b making 50 or 60 (not that i want it to). anyway im just trying to figure out wat happened to make it lose the boost. i have 1 tiny leak at the oring at the mouth of the turbo.. i mean tiny! have tested for leaks and theres no other leaks. maybe the turbos goin south? it sat for a few months on my garage floor while the head was off.
Diesel Fan
Joined: Feb 2011
Posts: 24
Likes: 0
WHAT??? yes it does
anyways because the 20 over u may have lost some idk i lost 2psi with my 20 over and 10 off the head and lost another 3 when i went to fly cut pistons but dont forget i have 700cc of fuel so the impact might be more for u but i dont know much about this so thats just my 2 cents but u do loose compression when u go .010 over on a gasket from stock
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yea thats a good point what one?
anyways because the 20 over u may have lost some idk i lost 2psi with my 20 over and 10 off the head and lost another 3 when i went to fly cut pistons but dont forget i have 700cc of fuel so the impact might be more for u but i dont know much about this so thats just my 2 cents but u do loose compression when u go .010 over on a gasket from stock
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yea thats a good point what one?
Last edited by justin c; Mar 6, 2011 at 08:24 PM. Reason: Automerged Doublepost
