Wastegate atmoshere dump?

[SYCLONE#1531]

I just installed new springs in my RPM 38mm wastegate and thought now would be the time to dump the wastegate to atmoshere for possibly a little more power? A friend of mine who works at Vengenace racing said that I could gain some power at the high boost levels. Target 29lbs. Has anyone done this with any beefits or should I just keep it dumping back into the dp.?

 

[RealFastV6]

Re: Wastegate atmoshere dump?

I don't know about the performance "benefits" but at a minimum it sure does make plumbing it easier.

It would seem that there'd be less backpressure in the exhaust tract that way and therefore less backpressure (by a multiplier of your turbine wheel \ housing) in your exhaust manifolds. It would basically make your downpipe act "bigger". So I guess the answer is it depends if you need it.

I had it that way on my TR but I certainly didn't do an apples to apples comparison because like most people I changed it as I changed the turbo \ downpipe to a different setup all-together.

:dunno:

I certainly will go that way on the Sy when the time comes, which will be soon because the PTE downpipe \ turbo combo I have now creeps bad.

 

[It's just a six]

Re: Wastegate atmoshere dump?

It will work better if you have the wastegate exhaust separate from the main downpipe, just run a mini muffler so it does not sound like a$$.

What size is your downpipe?

If you do rejoin the wastegated exhaust back into the main downpipe, rejoin the wastegate exhaust minimun 18-24" further away from the turbo, and re-enter the downpipe in as shallow of an angle as possible as not to desturb the main exhaust flow.
Sorta like this kind of angle.
1.75" wastegate pipe to 4" downpipe.

 

[SYCLONE#1531]

Re: Wastegate atmoshere dump?

Thanks for the info. Downpipe is from RPM

 

[Slyclone]

Re: Wastegate atmoshere dump?

What Kind of DP is that from... The one in the pic. Looks Diff.(routing)

 

[SYCLONE#1531]

Re: Wastegate atmoshere dump?

Any suggestions on a mini muffler?

 

[Beavis]

Re: Wastegate atmoshere dump?

I personally would leave it in the dp like it is now. I would think there is something else causeing your boost level problem. I have mine on the crossover and dumps to atmospher through a exhaust pipe off it. It's about 6 in long and is routed with some bends in it. I hate the way it sounds, but it does sound better with the pipe.

 

[qbnkiller]

Re: Wastegate atmoshere dump?

if the 'addition' of your WG gasses causes that much of an increase in backpressure, then you should reconsider your DP/exhaust combo. I think the best test would be to monitor your backpressure as it sits now...I would be interested to see how it is stacking up with that sized turbine wheel...

FWIW, I vent to atmosphere directly. Only because it is easier than funneling all that shit back into the DP.

 

[It's just a six]

Re: Wastegate atmoshere dump?

What Kind of DP is that from... The one in the pic. Looks Diff.(routing)

The DP in the pics is for my inline Turbo Chevy 250 6 cylinder.

His low boost problem was from too low of spring pressure from his wastegate. IIRC, 12 psi base spring pressure? And he wants to run 29 PSI. Don't think a 12 psi spring is going to do it, probably has 30 psi of exhaust backpressure before the turbine wheel as a rough guesstimate.

He is wanting to further increase his output & it is a good idea to run the wastgate exhaust completely separate from the DP.

As far as a mini muffler,, I would have to look around some, but I am sure if you look on the net you could find something that will fit your application.
Maybe a dirt bike or street motorcycle muffler. Just make sure it is large enough to flow properly.:tup:

Just an example: http://www.ebay.com/itm/SUZUKI-GSXR...s_Accessories&vxp=mtr&hash=item2ebb96c53fMake a flange & a short pipe,,,whala!!

or http://www.ebay.com/itm/New-Viper-P...pt=Race_Car_Parts&vxp=mtr&hash=item1c25e2c4a8

pics https://www.google.com/search?q=min...VHMiqiQLdxsWjCA&ved=0CCMQsAQ&biw=1326&bih=750

 

[bundie]

Re: Wastegate atmoshere dump?

If you sepperate them make sure your screamerpipe doenst exit in your engine bay.....

 

[0-60N4]

Re: Wastegate atmoshere dump?

I would like to see pics of a muffler installed on a wastegate installed ont eh cross-over down low. That's been on my list of things to do for about 15 years now.