I picked up a used turbo kit that is in great shape....it is supposedly a drag I kit but the manifold has no flange for the deltagate.

The guy I bought it from said it went on the compressor side of the piping, with the dump tube being tied into the downpipe.

Has anyone heard of running the wastegate after the turbo?

This sounds more like a pop-off valve, which would relieve pressure but keep the turbo at full rmps the whole time...good/bad? I dunno

just lookin for some answers and I am sick and on codine, so forgive me if this sounds weird I am just typing away.

P.S. I just did some research and I believe it is run off the downpipe...and ATR style wastegate.

The reason I ask this is because I already got everything with my turbo kit except for the deltagate and downpipe and never heard of it, is there a benefit of using this style setup?


Modified by yusoslo at 4:24 PM 12/9/2003

 

bump

 

so its like a blow-off valve that opens when you hit full boost. like a wastegate for the intake side. sounds like a waste of energy to me. im really confused. do you have any pics.
and if you havent bought wastegate, let me suggest a tial. deltagates suck ***. atleast mine did. 7lbs spring would spike and stay at 15lbs for a while. it helped me blow up a tranny

 

looks like this one, 1/2 way down the page, I wanna know if it works better and how it regulates boost.

https://honda-tech.com/zerothread?id=657832

 

i doubt it will work as well as a nornally placed wastegate. but for moderate amounts of boost it should be fine. you may see some spiking or creeping, but i doubt any significant amount. it still bleeds of exhaust gases and does the job.
most if not all factory boosted cars, work that way. with a flapper valve and a diaphram. that other thread has some good info on it
hth

 

well is it possible to put a flange on my manifold then? I need to make a new downpipe anyways, but I have heard that your shouldnt cut and reweld a cast manifold

 

up

 

anyone

 

nope... Don't try to weld on a cast manifold.

Tubular + modifying =
Cast + cheaper =

 

thats rare, but kinda common setup....I've seen it one EClipses/Talons and some Grand Nationals...there is nothing wrong with that setup. Think its called a "remote" wastegate setup(?) heres the version thats kinda similar for the DSMs cept the WG is directly on the outlet flange...

http://www.extrememotorsports....l.jpg

 

If you are going to machine a hole into a cast manifold or turbine flange, make sure that you heat the manifold and flange up (quite a few people use a cooking grill!), make your welds, and then put the entire assembly in a large container of sand (to cool the piece slowly and evenly. This is a pre-requisite to welding cast iron.

A remote wastegate (like the Grand National guys use) works well, IF the hole from the volute to the downpipe area is large enough. You have to worry about supporting the weight of the wastegate, and if you rejoin the wastegate dump back into the exhaust (most people don't), make sure you bring it back in a good ways downstream from the turbine discharge. A flex union or a slip joint flange on the wastegate dump side will help prevent cracking from the sudden expansion and contraction of the wastegate dump tube.

 

They guy is shipping the wastegate and downpipe today so I will send pictures.

Was I correct about the assumption of the turbo being fully spooled with this setup? Or does the wastegate still manage boost levels in the same manner as a standard setup, it just seems to me that running after the turbo it cant control the turbo directly, but control the boost being sent to the IM.

 

I guess you can just imagine it as an internal/external WG

 

so how does this regulate turbine RPM's??????

Thats how manifold mounted wastegates work, right!?

 

A wastegate diverts exhaust gasses from the turbine wheel to prevent the turbine wheel any faster. All wastegates work the same.

 

but if the wastegate is on the downpipe wouldnt the turbo be seeing full exhaust manifold gases?

i am just confused by the before and after the turbo set-up

 

imagine an internal gate setup...when full boost hits the actuator reacts and opens the flapper door, and lets the excess gasses out before they hit the turbine

in this setup its EXACTLY the same, just instead of having a flapper door(it is removed), you have the WG welded directly to the wastgate outlet(or a pipe connected to the wg outlet like the pic you showed)...either way excess gas is diverted when set boot hits as the WG opens and the excess gas passes through the pipe and into the DP...as far as response goes when mounted on the mani, I'm not 100% sure of the differences if any

 

thanks guys this makes alot more sense to me now. I just was worried it was a pop-off valve setup which would cause extra wear on the turbo, but I am glad this is not the case.