I am having a problem with boost spiking when the second turbo comes on line. I have the boost controller set at 12psi and when the second turbo comes on line the boost spike goes up to 15-16psi. I have a bigger intercooler, downpipe, midpipe, catback, intake, bigger fuel pump street ported engine with 3mm apex seals and a after market computer. If I can't get this boost spiking under control then I'm going to have to convert to twin setup; but I like the sequential better. I have also played around with the pill in the prespool line and I'm still getting the boost spikes. Please help!!!

R.K.

 

Read through this thread:

https://www.rx7club.com/forum/showth...threadid=26389

The problem is that with the midpipe, you are overwelming the wastegate.