# help with wastegate selection **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [October 15, 2008, 12:17pm UTC](https://forums.speedlife.net/t/help-with-wastegate-selection/200170 "2008-10-15T12:17:09Z")\ **Posts on this page:** 1\ **Showing post:** 10
**Author:** ![69camaro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/69camaro/32/6046_2.png) [@69camaro](https://forums.speedlife.net/u/69camaro)\ **Post date:** [October 16, 2008, 1:42pm UTC](https://forums.speedlife.net/t/help-with-wastegate-selection/200170/10 "2008-10-16T13:42:02Z")
> [@pls pray for foxinox](https://forums.speedlife.net/t/pls-pray-for-foxinox/38366/38): > > what size motor? > doesnt the fact that he has a 4.0L have to enter into the equation somewhere? > this conversation is a little over my head, but it seems like the larger engine would allow his wastegate to maintain the lower boost levels as it (the motor) would consume more of the charge air… correct?? thats a good point but you also have to consider the extra exhaust from the bigger engine. is there a calculation of somesort to figure a size? > [@Junkyards that pickup?](https://forums.speedlife.net/t/junkyards-that-pickup/38386/4): > > Synapse makes some really nice ones, but IIRC they are about the same price as Tial and of equal quality but an entirely different mechanism. As far as size? You could get away with two 38mm minimally. Nitroice may have a clearer answer. its actually a 8.1L with two t70s and as for as packaging i dont think i can fit four wastegates. --- _[View the full topic](https://forums.speedlife.net/t/help-with-wastegate-selection/200170)._