ebaydownpipe Please readbefore you think about buying a ebay or megan racing downpipe

[babyviper]

Well i built my girl freind a 97 gts spyder converted auto to manual . My problem is the car will not boost past 9-10 psi !!. mods are crower 264-272 14b turbo 7cm, willy 255 pump , afpr 43.5 psi.ngk non protruding 7es plugs 3' down piple 3' exhaust test piple on, hallman bc. jeff (dsm chips) chip. Iv done a boost leak test 10 times compression test from timing belt side is 145psi 175psi 177psi 170psi . Iv change 14b turbo with another one samething 9-10psi ?? it has no exhaust leaks!!!! (Iv even put vice grips) yes vice grips on the wastegate flapper on the exhaust housing The car is very slugish bad gasmileag. Well I found out the reason why the car wouldnt go ova 9psi. After all these tests and changing all these parts, it was the ebay downpipe. apparently the flex pipe that was only 3-4 months old, the inside of it had collapsed. Ill post pics of it soon . I was told from a guy at turbotrix (Bean) or Dean, that he has seen the flix pipes cause this kind of probloms. The inside of the flix pipe part of the downpipe had heat shrunk to the size of a quarter WTF so Think again before buying knock off stuff i think i learn my lesson

 

[bsbllfit7]

i looked under the car the other day and it looks like i can just unhook my downpipe from my catback and shine a bright as light up in there and should be able to see if the flex section has collapsed. Doesnt that sound like a better idea then sawing into the damn thing???

and for the record im not saying ebay products are bad, just think i may have got the bad apple, if this one is in fact bad im going to order up another one just like this one haha.

 

[johnmarines]

How I checked my flex was dropped the dp at the turbo and stuck a water hose in there. Feed it till it stopped .. it stopped right at the flex section so I knew the obstruction was there. I then cut it out and welded on a auto parts store flex pipe... lasted 4 hard pulls before it collapsed....

 

[Oldsid]

the downpipe fits, yes its against the oil pan but thats just our cars im pretty sure, the question here is about the flex section

I have the Megan Racing DP without nay problems for three years and does hit the oil pan. However, it is very simple to resolve this. I just added a spacer between the DP flange and the O2 housing. The spacer is just an exhaust flange of the same size as the one on the DP. You can buy it and an extra gasket from any mufller shop. This should clear the DP by about 1/4" fro the oil pan. if you want a picture of the set up, PM me.

 

[bsbllfit7]

even if it is hitting the oil pan the only difference there is going to be maybe a slight noise under normal driving conditions resulting from the DP rubbing against the oil pan, shouldnt effect the flex section and its ability or inability to collapse

 

[99gst_racer]

even if it is hitting the oil pan the only difference there is going to be maybe a slight noise under normal driving conditions resulting from the DP rubbing against the oil pan, shouldnt effect the flex section and its ability or inability to collapse

It can also cause phantom knock in some situations. I've read several cases where the knock sensor has picked up on the "noise" created from downpipe-to-transfer case contact. Just something else to keep in mind.

 

[bsbllfit7]

alright so i checked my downpipe today and it looks solid, no flexing whatsoever and it looks like its ribbed in there with some sort of metal to prevent collapsing. I am wondering if a really crappy tune will account for the very slow spool up. I build a few pounds by 3k and full boost around 5k or so on my 2.4l with a evo3 16g!

 

[99gst_racer]

Yes, a crappy tune could definitely make for a slow spooling and underperforming setup.

 

[bsbllfit7]

alright so i fixed it, the wastegate actuator wasnt closing, now im seeing 21psi by just under 4k rpms. MUCH MUCH better, im sure some tiny boost leaks and a better tune will lower that even more so from what its at right now.

 

[KevinMCMXXCIX]

I have a Megan Racing header with downpipe to the cat converter too.
But no leaks whatsoever ^^