timing for turbo

[b16rex]

Just wondering if a turbo application is similar to nitrous. Do you have to compensate by retarding your timing and if so how many degrees per psi?? Thanks, Mike

 

[posol]

nitrous doesn't run on psi.. lol

but, nitrous is more like an all motor setup in terms of timing... nto as much, but a slight advance up top will make good power.

butyou better have the fuel to keep up with it.

 

[[Freemantle]]

Originally posted by b16rex@Aug 25 2004, 04:19 PM
Just wondering if a turbo application is similar to nitrous. Do you have to compensate by retarding your timing and if so how many degrees per psi?? Thanks, Mike

[post=381705]Quoted post[/post]​

The conservative "retard per psi" for turbo setups is about .8-.95 degrees per psi, never to fall below 7 degrees. These are only used to set base maps to be built apon with further tuning. Over-retard and advance back to perfect.

 

[b16rex]

cool thanks guys!! Also I was just wondering about my wastegate. I have a 35mm tial with a 6 pound spring. When the wastegate senses full boost it lets out the extra right?? Or does it let all the boost out to where you dont get anymore? When I get in to the upper rpms I hear a woosh sound(wastegate opening?) then I feel like I hit a wall losing power?? I initially thought of fuel, but my a/f gauge is still in the green. Dont know whats going on!! Please help... Thanks Mike

 

[hcivic.com]

when the boost hits 6 psi it opens leting out the excess pressure

 

[nfn15037]

Originally posted by b16rex@Aug 26 2004, 12:20 AM
cool thanks guys!! Also I was just wondering about my wastegate.  I have a 35mm tial with a 6 pound spring.  When the wastegate senses full boost it lets out the extra right??  Or does it let all the boost out to where you dont get anymore?  When I get in to the upper rpms I hear a woosh sound(wastegate opening?) then I feel like I hit a wall losing power??  I initially thought of fuel, but my a/f gauge is still in the green.  Dont know whats going on!! Please help... Thanks Mike

[post=381986]Quoted post[/post]​

Maybe your blowoff valve is set too loose allowing it to open and bleed off boost at the wrong time? You really should have a general understanding of this stuff before getting it on your car..... :unsure:

 

[b16rex]

Actually this is my second turboed car. I had a 99 si with a drag gen 3 kit and I had no problems whatsoever. Thanks for your help though!! I'll try the bov!!