Hey what's up John?
I don't have a way to measure backpressue (yet). But I do know that the backpressure is enormously less than the previous 76GTQ .85 3 bolt I had. The exhaust note sounds even a ton different then before. Hence, this is also why I jumped from the 3 bolt all the way to the GT42 housings instead of stopping at the 76GTS.
I don't think I'll ever try the torcher the car or anything to max out my combo (trying to stay <25psi ~ mid 9's hopefully). I'm just trying to find a good spool-up balance street/strip. There is definitely more tuning to do, but as is, the car takes an instance to build the first 1-2psi, but then rockets to full boost.
So, that being said.. do you think it's worth a try on the smaller housing before I try to measure any backpressure?
Thanks,
John