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Modified by weiRtech at 9:09 PM 5/31/2008

 

looks great as always

 

I highly suggest a flex section on the rerouted dumptube. You probably dont' want to name the manifold fabricators no?

 

Agreed, I don't backpurge either. I DO weld the runners on the inside @ the head flange and inside the turbo collector/flange. Looks good

 

o yah, whats going on with that tube coming out of the oil pan?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wade &raquo;</TD></TR><TR><TD CLASS="quote">o yah, whats going on with that tube coming out of the oil pan?</TD></TR></TABLE>

that is the oil return line that is used for my top mount setup.
http://www.homemadeturbo.com/f...86971

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GeeGee &raquo;</TD></TR><TR><TD CLASS="quote">I highly suggest a flex section on the rerouted dumptube. </TD></TR></TABLE>
I was going to questiont hat too. I have never made one without a flex but from what I have read it's problematic, how are these holding up?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">
I was going to questiont hat too. I have never made one without a flex but from what I have read it's problematic, how are these holding up?</TD></TR></TABLE>

Not like it's going to crack right away, but it will have high chance of doing so after so many heat cycles/expanding, especially with stainless steel.

Here is a similar setup i did a while ago, all mild steel so it doesn't look as bling.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">
I was going to questiont hat too. I have never made one without a flex but from what I have read it's problematic, how are these holding up?</TD></TR></TABLE>

The real problem IMO not using a flex pipe is getting it to line up properly. Its far easier to use a flex & allow for play than be slightly off due to the bolts not allowing a perfect, same-each-time fit. Not that its an excuse for bad fitment, but when the part can move as much as an inch between mock-ups, it just makes sense. With v-bands, I wouldn't expect it to move as much though.

You can get an inexpensive flex from the following link, cheap enough to make it work fine. The tuner I know hates recirculating, but he only deals with **** others make, not his own, so he doesn't get to play with the design.

http://www.exhaustdepot.net/flexsection.html

 

On a re-routed dumptube, the problem with not using a flex section is thermal growth, period. Your downpipe and exhaust are exposed exhaust temperature the whole time your engine is running. Think of how fast your wastegate responds, its in that transient time that dumptube goes from being cold (closed wastegate) to exhaust has temperature (open WG). Thermal stresses are a killer on that section.

-Schuyler


Modified by skyman88 at 2:13 AM 5/17/2007

 

i don't expect it to be a problem on such a short section of pipe. there is hardly room for a flex section anyway. the amount of thermal growth i imagine will have a minimal effect in this setup. i've done a couple setups like this without issue.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GeeGee &raquo;</TD></TR><TR><TD CLASS="quote">You probably dont' want to name the manifold fabricators no?</TD></TR></TABLE>

second is SLS

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by weiRtech &raquo;</TD></TR><TR><TD CLASS="quote">obviously he wasn't concerned about a manifold warranty, or maybe it doesn't come with one.</TD></TR></TABLE>
Lifetime warranty, shouldnt void the warranty though just the gate runner was cut/modified


Modified by akira712 at 12:57 AM 5/17/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by akira712 &raquo;</TD></TR><TR><TD CLASS="quote">

second is SLS

Modified by akira712 at 12:57 AM 5/17/2007</TD></TR></TABLE>

first is neukin

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by weiRtech &raquo;</TD></TR><TR><TD CLASS="quote">i don't expect it to be a problem on such a short section of pipe. there is hardly room for a flex section anyway. the amount of thermal growth i imagine will have a minimal effect in this setup. i've done a couple setups like this without issue.</TD></TR></TABLE>

Actually, I do believe the shorter the section the more problem it will pose since longer section will offer a little "flex". Like somebody else mention, it's the thermal expansion. I've always had problem doing this without the flex section, I hope this won't be your case since those set up look pretty good.

 

you aren't going to get much shorter than this one and i haven't had any problems with it.

 

i rerouted my wg dumptube without using a flex pipe. This bcs theres simply no room.

This is what i came up with;



I did use spring washers to "fix" the wastegate this allows for some shifting/movement.

I did have a flex pipe, but i couldent find a way to make it work. Again, theres no room left.

Driven her for 2k miles now, no problems yet

 

re-routed w/out flex pipe. I ran it open dump for a long time.

 

when i do my ls-t me and my welding intructor are making a custom dp with the dumptube rerouted

 

I've routed one without a flex joint, 1 year counting and its still fine, I probably wouldn't do it again though, its just extra insurance so why not.

 

all you with open dump are losing power...have your dumptube go down under the oil pan...the exhaust from the open dump takes sooo much power away when its just trapped in your engine bay

 

stick it out the hood! clean, short, simple. what more could you ask for?!

 

^
Wow.

 

what happens when it rains?

 

looks like a whale the first time you hit full boost?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugenEGG &raquo;</TD></TR><TR><TD CLASS="quote">what happens when it rains?</TD></TR></TABLE>

For a period of time he kept a plastic drink cup that if it was going to rain out, he would pop the hood and place the cup on the dumptube. The hood would hold it firmly in place. I'm sure he forgot at one point or another but nothing ever happened.

under boost you dont really see anything, when you hit the limiter at night is when you get a light show