What boost pressure should i be expecting?

[peter_booker2003]

Hoping someone can explain this to me in dummy terms?
Doing a bit of Data Logging this evening and just wondering if the boost actual and specified are looking ok?
Seems to drive spot on but just after a second opinion.

In 2nd at 4960 RPM, Specified was reading 1050 and Actual reading 1170.
Changed into 3rd and at peak 5760 RPM is was reading 1410 Specified and 1380 Actual.

Hoping someone can point me in the right direction as to if these look ok?

[rich83]

What car? What engine? What stage of tune?

[peter_booker2003]

Apologies.

Stock Mk5 GTI. 197 Bhp.

[bonelorry]

Lower gears are not ideal for doing any logging, I would find a long straight road (Private Runway) and do a run in 4th gear from virtually 1500RPM right upto the redline that way you get a full reading across the entire rev range.

In the lower gears because the revs whip round so quickly generally the readings are never spot on, You need a longer gear where the engine is under load and you tend to get more stable readings.

When me and a friend do Mapping/Logging on his Saab powered project its all done in 4th gear 

[lukemk5gti]

Lower gears are not ideal for doing any logging, I would find a long straight road (Private Runway) and do a run in 4th gear from virtually 1500RPM right upto the redline that way you get a full reading across the entire rev range.

In the lower gears because the revs whip round so quickly generally the readings are never spot on, You need a longer gear where the engine is under load and you tend to get more stable readings.

When me and a friend do Mapping/Logging on his Saab powered project its all done in 4th gear 

+1

Log from a rolling start to redline in both third and fourth gear.

I was able to do mine safely on a motorway on a quiet Sunday. Rolled onto motorway in 3rd gear and got to 6200rpm.

Forgot to press the log button though