Will only boost high when engine is cold

[crazyquik22023]

So my car will only boost past 20 psi when i first start it from a cold or pretty cold start. It will boost fine up to 25psi when the engine is cold but when the engine is hot it will not boost past 20psi. It will normally boost up to 20psi fine but will not go past. Sometimes it stuggles from 15psi to 20psi but normally will boost fine up to 20psi and will hold boost but will not go past 20. Coolant temps are normal 210deg or below.. intake temps are kinda high i've seen between 110-115 so i raised the timing by a degree or 2 in the direct access timing max oct tab on DSMLink v3 to compensate for the high intake temps.. after raising the timing i still don't see any knock. I raised the timing from the load factor when i'm at 20psi and everything to the right of that table by about 2 degrees. It still will not boost past 20psi. Do you guys thinik this is a timing issue or what? Should i raise the timing more or do you think it is another problem. Any info would help.. also profile is up to date and AFR's are between 10.7-10.9 on full throttle pulls. also have logs if needed

 

[MJBean420]

sounds like a traditional boost leak. Check the hotside stuff though...exhaust manifold, turbo bolts, etc.
I had a small leak on a turbo bolt once.

 

[crazyquik22023]

sounds like a traditional boost leak. Check the hotside stuff though...exhaust manifold, turbo bolts, etc.
I had a small leak on a turbo bolt once.

if it was a boost leak which it is not... why would it only boost when the engine is cold?? It will boost up to 25psi all the time when the engine is cold but never when the engine is hot... doesn't sound like a boost leak to me

 

[crazyquik22023]

anyone????

 

[nweidlich]

could be when its cold everything is tight and contracked so a small crack or what ever ## poison might be sealed and when it heats up everything expains something might get loose, maybe even your wastegate hanging up

 

[Dert]

if it was a boost leak which it is not... why would it only boost when thee engine is cold?? It will boost up to 25psi all the time when the engine is cold but never when the engine is hot... doesn't sound like a boost leak to me

When things get hot they expand, a tiny crack can be sealed when cold but when things heat up the crack can expand and voilà, you now have a leak. Do a boost leak test when it's cold, then get the car nice and hot and boost leak test again

 

[98GSXtacy]

I agree with everyone above. Small issues hide themselves great when they are cold and give ya hell when they are hot.