you dont need 2 gates either .. get a tial 44mm vband gate and get the 38 -44 adapter from atp turbo and you wont have any more problems...Ive seen it happen alot with a big exhaust housing turbos...and like he said its because of low pressure...if the exhaust is flowing easily through the turbo its not going to want to go out of the wastegate as much as if it had high pressure..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Synapse &raquo;</TD></TR><TR><TD CLASS="quote">I agree with Tony, that it is the fault of the gate. But don't let the 38mm number fool you. It comes down to the amount of lift that the valve has. Turbosmart claims a high lift valve. Someone might want to call Tial and Turbosmart and ask them what is the maximum lift of their valve. At least if you don't have to re-weld a flange, you can just buy a different gate.</TD></TR></TABLE>

the turbo smart 38 will suck jsut as bad as the tial./..beent here done that...the only thing its good for is hieght clearence

 

so i guess to eliminate low press in the manifold all you do is turn the boost up?? i'm planning getting a top mount with 2 WG and prob a GT40R. if i run boost lower that 20 u think i'll have probs with boost creep with 2 38MM Tials ???

 

well after taking everything apart & looking at things thier are flow flaws in the mani. u can see inside the flang that thier is a big lip where the flang bung meets the collector. also where the pips come together in the middle it sticks into the flang area blocking some flow from the back 2exaust ports.

i will cut the inside section sticking down about 1/2 inch up & weld a small tip on it.
aslo u can see the new bung sitting on top of the flange so its alot more diameter thier. i will port the hell out of the new piece once its welded on & curve the inside real nice. ill post pics when its done.
so with all that said ill say neukin makes a good sturdy mani with good welds but doesnt clean the inside up for better flow.

 

yeah... its all about the flow!!!

 

Yeah, i figured it was something in the build of the manifold. Seeing how i've had more than a few neukin manifolds do the same thing, where other brands don't.

 

i dont think its the a build factor cause the quality is good he just didnt go back in after & clean it up. cause theirs no where else to put the bung

but i guess thats what people like me are for to fix other pepoles flaws.

 

Cleaning up and making sure the manifold functions is part of the build quality of the manifold. It's obvious that the extra time was not taken to make sure everything was right.

 

Tony1: You wanted to see the inside of a Neukin manifold? Here´s a pic.

 

put a bigger spring in it before changing the WG. trying to hold down the boost that low on that set up isnt going to be easy to do

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pabbe &raquo;</TD></TR><TR><TD CLASS="quote">Tony1: You wanted to see the inside of a Neukin manifold? Here´s a pic.

</TD></TR></TABLE>

And that is why they boost creep so bad...

 

I think I've seen way worse fabrication out there that didn't creep.

I think that there's something wrong with your WG. Have you thought to check it out if it is sticking? Or swap it out with Tial? Either way, I would return it, or try someone else's before doing anything else.

I know that you hear the gate opening, but you don't know how much the valve is lifting. I think that it is a defective gate.

 

i'd feel confident saying that the wastegate its self is perfectly fine. run into this problem on one too many cars. actually putting a second wastegate on a manifold right now for a customer. wont hold anything less than 22 psi with a 48mm wastegate on it. with the manifold off the car, looking inside....you can clearly see why, its just a bad design.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-charged &raquo;</TD></TR><TR><TD CLASS="quote">i'd feel confident saying that the wastegate its self is perfectly fine. run into this problem on one too many cars. actually putting a second wastegate on a manifold right now for a customer. wont hold anything less than 22 psi with a 48mm wastegate on it. with the manifold off the car, looking inside....you can clearly see why, its just a bad design.</TD></TR></TABLE>



We've been through all this over and over again. Joe, why don't people believe us?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pabbe &raquo;</TD></TR><TR><TD CLASS="quote">Tony1: You wanted to see the inside of a Neukin manifold? Here´s a pic.

</TD></TR></TABLE>

Oh wow. I wonder why he uses that size of hole saw. The one I use (think its 1 and 5/8") fits the ID perfectly.

 

well here is the pic of the new bung on its not real thick but its only 3/4 long so it should hold.

 

Make sure you brace your WG.

 

This sucks. Now you guys got me worried about my Neukin manifold which I have yet to install.

 

I don't really know what you guys are pointing out as to problems with this manifold creating boost creep. Here's a pic of mine. Same thing?

 

Its quite obvious really... Read the above one move time Its the hole for the WG

 

ya i had that planed cause the wg alon is alot heavyer alone. & i believe most manis crack from heat "and" weight hanging on it. om going to weld a brace onto the dump tube going down to the front cross brace
with a bolt should help alot & i dont have to worry cause my motor doesnt move at all.

& i dont know the center of that collector looks a little dull u shuld sharpen it
no but really at the top part of your collector i can see light hitting the 2 points from the WG hole that will effect your flow out. i would grind all pertruding metal down & away

 

It isn't that I don't believe you guys. There's logic there to support what you're saying.

However, I'm in the middle of designing and testing my own design for a WG from scratch right now. And I know for a fact how to make creep happen on demand. Pretty easy to do, limit the travel of the valve. Doesn't matter if you open it early, it'll still creep. If the valve is at full lift and you're getting creep, then it is either a flow path issue or you're maxing out the flow of the size of the gate. Since it doesn't involve cutting, it doesn't hurt to give all the avenues a try.

There's something there that we can't t verify, spring rate. The higher the spring rate, the lower overall deflection and valve travel per pound of boost. There is a rising rate ratio with all springs and it is determined by spring rate. At the end of the day, I don't think that someone did their homework right on Engineering the spring rate on that gate, if you what you guys are saying is true.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Synapse &raquo;</TD></TR><TR><TD CLASS="quote"> If the valve is at full lift and you're getting creep, then it is either a flow path issue or you're maxing out the flow of the size of the gate. </TD></TR></TABLE>
So you agree with us lol... He just posted pics of the fixed flow path and now he is getting a 44MM gate Thanks for the sum up

 

Theres nothing wrong with neukin manifolds and that guy takes care of his customers...ive seen plenty from him that dont creep and i have yet to see someone with a tial 44mm vabnd gate thats having these problems. if you have a 48mm gat and cant hold anything less then 22 psi the diaphram is ripped inside the gate

 

well firs i am going to a 46 tial. secons neukin doesnt make his mani the way they should.
the exaust flange was warped so they put a beed of weld about 1/8 wide arouns
exaust 1 exactly where the crush gasket line is then sanded down flat . when they
should od just sanded the whole thing down more & got the whole thing flat.
i called them about it they said send it back we will fox it well i dont have
time for that i had it done locally witch cost $$$ & now im fixing his wg port.
witch yes im going to a bigger size but as the pics showed thier was alot of
flow design error due to not cleaning uo welds wct. as the same with the ohter
neukin mani pics.