So uptil this morning i hadn't pressed the throttle all the way down on the Sei. This was because it was underfueling on full boost blah blah, is unimportant.
Anyways, the fuelling has been fiddled with today and now i can happily put my foot right down without fear. However, i notice now i can do it that the car that the boost comes in real strong and quick and reaches 11psi on my guage at about 2.5k revs. But at about 3.5k revs boost starts to die off again, reading only (approx) 5psi from 4.5k upwards.
My assumption on this is that the standard exhaust is holding it back at full chat, this a reasonable assumption?? This is not something i ever had happen in the old tub, even when its was seriously over-boosting it held its boost right through the range. The main difference as i can see between the 2 cars is that the cinq tub had a sports mid section and janspeed backbox although this was all standard bore as well.
Opinions please.
Anyways, the fuelling has been fiddled with today and now i can happily put my foot right down without fear. However, i notice now i can do it that the car that the boost comes in real strong and quick and reaches 11psi on my guage at about 2.5k revs. But at about 3.5k revs boost starts to die off again, reading only (approx) 5psi from 4.5k upwards.
My assumption on this is that the standard exhaust is holding it back at full chat, this a reasonable assumption?? This is not something i ever had happen in the old tub, even when its was seriously over-boosting it held its boost right through the range. The main difference as i can see between the 2 cars is that the cinq tub had a sports mid section and janspeed backbox although this was all standard bore as well.
Opinions please.