crazy turbo wastegate idea!

[hondakid1996]

Okay so first of all id like to shout out to deev for setting me on the right track for my turbo setup cuz I know he'll probably read this lol. But anyway I got to thinking, say you have an internally wastegated turbo. Now again say that turbo is waste gated at...15 psi, but you only want to run say...8 psi. Now from what research I've done the only way to lower wastegate pressure on a turbo like that is to lengthen the wastegate actuator arm. That's simple enough but can cause lag and chatter from the wastegate being held open. So my I idea was this, basically an external wastegate vents exhaust gases before entering the turbo once it see a set psi. Since gases are vented turbo no longer increases spool speed thus maintaining boost. But all that's known. My idea was that you put a waste gate on the charge piping say right after the turbo. Run a boost controller and vacuum lines just like a normal waste gate except it will bleed off boost instead of exhaust. So the turbo can still spool until its internal wastgate says stop but by then the external wastegate will have already bled off the extra boost. Now if there are flaws please point them out constructive critisisom is welcomed I mean this was a crazy 3 am idea anyway lol. Also this could tottaly have already been done but oh well im excited about my find haha.

[visualpoet]

...basically an external wastegate vents exhaust gases before entering the turbo once it see a set psi. Since gases are vented turbo no longer increases spool speed thus maintaining boost. But all that's known...

I'm not an expert on turbo, but IIRC, the wastegate is after the turbo and vents the pressurized air going to the intake, not the exhaust gases. The wastegate not only keeps you from running too much boost, it bleeds pressure off when the throttle plate closes in order to keep you from blowing apart your piping from the snail to the throttle body or worse.

Someone correct me if I'm wrong.

[sulimed]

I'm not an expert on turbo, but IIRC, the wastegate is after the turbo and vents the pressurized air going to the intake, not the exhaust gases. The wastegate not only keeps you from running too much boost, it bleeds pressure off when the throttle plate closes in order to keep you from blowing apart your piping from the snail to the throttle body or worse.

Someone correct me if I'm wrong.

thats what blow off valve does. to the OP. stop trying to reinvent the wheel. one of the jobs of the wastegate is to keep a turbo from spinning it's self to death

[hondakid1996]

thats what blow off valve does. to the OP. stop trying to reinvent the wheel. one of the jobs of the wastegate is to keep a turbo from spinning it's self to death

So you can put a boost controller on a bov? Okay then.

[turboAccordHSF]

Sorry to burst your bubble *POP*....but hondakid1996 good luck getting your car running...

Your idea is very creative but a lil crazy...

The wastegate does more than you think. But placing it on the charge piping won't do you any good due to right when the gate opens it's going to act like a blow off valve except its not even close to a bov and will create a massive boost leak and even whens it closed and its building pressure your psi will spike up like crazy due to no wastegate on the turbo or manifold controling the pressure from reaching its *Boom* limit....so besides the fact that pressure just spiked up like crazy then your wastegate opens and releases pressure and its not bleeding pressure in small amounts. That shit is going to dump pressure in big amounts! Causing a big leak and your car mostly likely to stall or just bog like a mofo.

I think its just going to spike and then boost is going to hit a giant wall!!!!

Plus even if it could work you can't even tee anything off the bov like a (MBC or a Boost gauge) ...the bov should be hooked directly to your intake manifold some plp think its OK to place a boost controller there lol

[turboAccordHSF]

so You Can Put A Boost Controller On A Bov? Okay Then.

Nnnoooooooo!!

Do Not Do That!!!

[turboAccordHSF]

I'm not an expert on turbo, but IIRC, the wastegate is after the turbo and vents the pressurized air going to the intake, not the exhaust gases. The wastegate not only keeps you from running too much boost, it bleeds pressure off when the throttle plate closes in order to keep you from blowing apart your piping from the snail to the throttle body or worse.

Someone correct me if I'm wrong.

Hey brother, he is talking about a wastegate that's either external on the manifold or internal in the turbo...

plus bov releases/opens unwanted air after the throttle closes

Wastegate opens during boost and at throttle and releases exhaust gases b4 fully reaching the turbo...

[hondakid1996]

Nnnoooooooo!!

Do Not Do That!!!

Lol I see what you guys are saying. Basically the turbo I have has an internal wastegate set higher then I want to safely run so I was thinking about ways to lower my psi

[turboAccordHSF]

Let's just drop this idea for now...

Hondakid- you want to come up with an idea so you can run lower psi than the factory set psi on a internal wastegated turbo, then here's one

The car lords created the External wastegate and followed by psi springs...

Yoy need to delete the internal wastegate and go external and buy 8 psi springs and then mount a boost controller there and this is going to be placed on your turbo manifold

It's going to cost you money but not as much as you replacing the dam turbo itself or your whole engine..

[hondakid1996]

Let's just drop this idea for now...

Hondakid- you want to come up with an idea so you can run lower psi than the factory set psi on a internal wastegated turbo, then here's one

The car lords created the External wastegate and followed by psi springs...

Yoy need to delete the internal wastegate and go external and buy 8 psi springs and then mount a boost controller there and this is going to be placed on your turbo manifold

It's going to cost you money but not as much as you replacing the dam turbo itself or your whole engine..

Okay well thanks for the help and more importantly thanks for stopping me before I went and blew something up lol ill see about that external conversion kit

[zack_odom]

Okay so first of all id like to shout out to deev for setting me on the right track for my turbo setup cuz I know he'll probably read this lol. But anyway I got to thinking, say you have an internally wastegated turbo. Now again say that turbo is waste gated at...15 psi, but you only want to run say...8 psi. Now from what research I've done the only way to lower wastegate pressure on a turbo like that is to lengthen the wastegate actuator arm. That's simple enough but can cause lag and chatter from the wastegate being held open. So my I idea was this, basically an external wastegate vents exhaust gases before entering the turbo once it see a set psi. Since gases are vented turbo no longer increases spool speed thus maintaining boost. But all that's known. My idea was that you put a waste gate on the charge piping say right after the turbo. Run a boost controller and vacuum lines just like a normal waste gate except it will bleed off boost instead of exhaust. So the turbo can still spool until its internal wastgate says stop but by then the external wastegate will have already bled off the extra boost. Now if there are flaws please point them out constructive critisisom is welcomed I mean this was a crazy 3 am idea anyway lol. Also this could tottaly have already been done but oh well im excited about my find haha.

The thing you are talking about is called a boost controller. Get one. Problem solved, wtf is all this extra crap. Keep it simple stop over-thinking things.

[hondakid1996]

The thing you are talking about is called a boost controller. Get one. Problem solved, wtf is all this extra crap. Keep it simple stop over-thinking things.

You can't use a boost controller to lower psi on an internal wastegate.

[turboAccordHSF]

The thing you are talking about is called a boost controller. Get one. Problem solved, wtf is all this extra crap. Keep it simple stop over-thinking things.

Wow ...your a good source of help..

A boost controller (bleeder style or ball spring) adjusts PSI as in raises and lowers the pressure..but only over the factory set psi...so if the wastegate is set at 11 psi you can raise it 17 psi and then lower the psi back to 11 which is factory set and that means completely closing the boost controller. That's also like running the wastegate directly to the turbo boost source it'll just run stock psi...

The op wants to go lower than the factory set psi is at....which cannot be done by a MBC of any kind...just an aftermarket external wastegate and a specific psi spring...

[92smokeaccord]

Wow ...your a good source of help..

A boost controller (bleeder style or ball spring) adjusts PSI as in raises and lowers the pressure..but only over the factory set psi...so if the wastegate is set at 11 psi you can raise it 17 psi and then lower the psi back to 11 which is factory set and that means completely closing the boost controller. That's also like running the wastegate directly to the turbo boost source it'll just run stock psi...

The op wants to go lower than the factory set psi is at....which cannot be done by a MBC of any kind...just an aftermarket external wastegate and a specific psi spring...

i got a little confused on the last post of yours....but heres what i got..


so what ur saying is, take a ebay wastegate for example that is a 20lb boost min and 25-30max with a controler and just change the internal springs to lets say a 10lbmin spring so now making it a 10lb boost wastgate? external of course.....but if thats the case can he just change the spring on the internal turbo the same way but more work?

[turboAccordHSF]

i got a little confused on the last post of yours....but heres what i got..


so what ur saying is, take a ebay wastegate for example that is a 20lb boost min and 25-30max with a controler and just change the internal springs to lets say a 10lbmin spring so now making it a 10lb boost wastgate? external of course.....but if thats the case can he just change the spring on the internal turbo the same way but more work?

Correct you can do that too I forgot about that....

But usually DSMers do that to repair an internal wastegate or modify it to avoid certain things.

Plus I don't see the point and can't think of what source can supply you with a spring that's going to go in a internal gated turbo like the 14b/16g ....they usually just delete and go external and it solves most of your problems like less boost creep.