ive noticed recently that the trend for cars is running dual wastegates. The first that comes to mind is Kenny, Gary and recently Bryan down here, and my friend Minh. Any logic behind this? I know its probably more for safety than performance correct?thanks-pdang

 

maybe so they dont have to find one super large one.. bleed of boost at two sources w/ two medium sized one?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jerseykid609 &raquo;</TD></TR><TR><TD CLASS="quote">i believe Kenny uses two wastegate's due to the manifolds divided housing. i assume that others use dual gates to get faster more responsive boost control but thats that i assume could be wrong </TD></TR></TABLE>

Yer wrong...it's to keep the boost down in first and 2nd gear.

Suprdave

 

they actually run the two wastegates, because of the divided housings. there is alto of advatages of running a divided housing turbo.

 

your not wrong, thats my point...

 

Actually, Gary was the first to run that dual wastegate setup i think.

It keeps the boost rock solid throughout ALL the gears,


Modified by SIXTYdashONE at 10:40 AM 11/7/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by miller &raquo;</TD></TR><TR><TD CLASS="quote">your not wrong, thats my point...</TD></TR></TABLE>

Maybe that's why Gardella runs 2...

 

On garys car the boost wouldnt drop lower thatn 30psi in first thats why we tried to gates now we can run as low as 18 psi all theway up to 10500

 

I figured people were finding gains by smoothing out the exhaust flow with the second gate.

Speaking of boost response, my car does the strangest thing in first gear, I'm launching at 5400 rpm and 160-180 KPA boost, but as soon as clutch is released and the load goes up the boost will just fly right up to 300. After the shift to second it will run a rock solid 220 if I want it to. Just wondering if anyone had seen that happen.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hotroddd &raquo;</TD></TR><TR><TD CLASS="quote">On garys car the boost wouldnt drop lower thatn 30psi in first thats why we tried to gates now we can run as low as 18 psi all theway up to 10500</TD></TR></TABLE>

Oh hey, guess Im right...good job everyone who tried hatin'

Suprdave

 

I was referring to miller, who was quick to contradict me. Not Cool...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SIXTYdashONE &raquo;</TD></TR><TR><TD CLASS="quote">Actually, Gary was the first to run that dual wastegate setup i think.

It keeps the boost rock solid throughout ALL the gears,


Modified by SIXTYdashONE at 10:40 AM 11/7/2003</TD></TR></TABLE>
Actually he wasn't, there have been a few unknown guys in jersey that had that from about 6 years ago.I believe Alphie from VH was doing them.


Modified by boostsohfast at 9:00 AM 11/8/2003

 

listen superdave, if you knew what you were talkin about maybe i would get into an invlved in this conversation with you but i dont have time to sit on honda tech all day and post i have to actually build cars. we run the dual wastegates on manifolds that are divided housings for a couple reasons and the main reason being that it is a divided housing and you cant just run a wastegate off of 2 of the cylinders. so to make it alot easier we just run 2 wastegates. yes boost control is a factor for some people and 2 wastgates make it a little easier to get that really low boost setting. but ...superdave the reason i said that jerseykid609 wasnt wrong is because kenny runs a divided housing. and as far as gary being the first one with 2 wastegates sorry no way. the first car i have ever seen with the two wastegates was the BMW le mans car that was built back in 1986 and was a 2liter. 4 cyl. that made 1370hp totally reliable. maybe it was done prior to that car but that was the first to my knowledge. and they ran 2 wastegates beacause of the divided housing and exhaust flow reasons. like i said i dont want to start a huge debate over this.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hotroddd &raquo;</TD></TR><TR><TD CLASS="quote">On garys car the boost wouldnt drop lower thatn 30psi in first thats why we tried to gates now we can run as low as 18 psi all theway up to 10500</TD></TR></TABLE> probaly more a problem on methanol? Do the big slicks and bars load the motor up so much that it builds that much boost early? pretty crazy probaly not needed on a street car though. Jason

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by miller &raquo;</TD></TR><TR><TD CLASS="quote"> i dont have time to sit on honda tech all day and post i have to actually build cars. </TD></TR></TABLE> I know, since posting at 7:30am and 1:30am means I sit on H-T all day...I prolly work as much as you. Hah, anyways...I didn't say that the only reason people run Dual Wastegates was to keep boost down in 1st gear. I said thats the reason that the Hot Rod guys are...You were quick to jump down my throat like Im an idiot and your some all-knowing god. Whatever, I don't wanna have beef with you over some bullshit like this. Holla.

Suprdave

 

no doubt, i was just stating that jerseykid609's statement wasnt wrong.... its all good...

 

miller -- actually on a lot of high revving extremely fast pulse/sec engines the divided housing is not the way to go

 

Actually, kenny has a divided manifold and not a divided housing. Can I post the pic Geoff or tony?

art

 

jotech techs old manifold which btw is for sale in fi/class for $1000

 

I have a very similar manifold like d-man posted with the turbine facing out. After this post i was wondering if i should cut the two wastegate tubes and have one wasegate coming off each one? I will be running stupid amounts of boost and I want the most accurate setup possible.thanks-pdang

 

Run it with 1 large WG, first...If it ain't broke, dont fix it.

 

dont post the pic, but you are mistaken art, look a little closer and think about which cyls are divided, too

 

Wow, all this drama while i'm gone! Kenny runs two wastegates because that's what it takes to keep the boost down. It has nothing to do with the divided collector or the turbine housing. Our housing is not divided. I'll say it has to do with the sizing on our turbo, and i'll keep it at that...