7 BOUND

hey guys about to do my single install but need a wastegate, lil lost at what size i should get can you help, and yes i tried to do a search and nothing but random things come back

vspecpgt

get a big one... my standard hks creeps....... but also make sure you can get a decent sized spring... if your only going to be running 15 lbs or so, you don't want to get a spring that starts at 15-20 lbs.

r1dreamer

iTrader: (4)

yes def get a 50mm if you can get a 60mm, bigger is better, just check out the prices first

sleeperfc

do you think a 50mm will be good enough for a 4"DP and 3" catback?

Carl Byck

A bigger WG lets you run lower boost. A wastegate is simply a bypass. In VERY rough terms, each main runner is 50mm, if you have a 50mm WG, and the manifold is designed well, you can, in theory bypass half the exhaust energy of the motor(avoiding the turbo). This gives you a rough guideline. The problem is almost all manifolds favor the flow to the turbo over the flow to the WG, Soooo you need a bigger WG than what simple math would tend to indicate. Assuming you plan to run pump gas ordinarily, you'll need a WG that can bypass enough flow to keep the boost down to ~12-14psi on a T78, (unless you are using water injection). A 50mm WG is not overkill, and an HKS standard is too small as mentioned above. Hope that helps, Carl

7 BOUND

wow thanks carl and all that reply that helps out so much just when you think you have it down something else pops up, i guess thats what happends when you love your FD lol

RETed

There is no such thing as overkill or "too big" a wastegate.
If you got the money, I would highly recommend getting the biggest you can afford.


-Ted

Fierce

And get a Tial.

rx72c

iTrader: (8)

50mm is over kill.
But there is nothing wrong with over kill.
But make sure your manifold design is good as well.
You can have a 250mm wastegate but if your manifold design is **** it will still over boost.

7 BOUND

ill be running t-78 manifold i think its SS