|Topic Review (Newest First)|
|04-14-2019 11:05 AM|
I'd take both the header and the mid pipe to a fabricator. Get the guy to make a new flange on the mid pipe or header, whatever is easiest. He'll have to weld the pipes closer or further apart on one end to compensate for the difference in distances.
Like Peanut said, the flow is going to be crap with that much of a difference.
|04-13-2019 05:17 AM|
My real point was just that with such a mismatch in flange sizes I think it's making the area for the edge of the gasket to seal/cover that much thinner. It seems like both the dna flange and megan racing flange are perfectly flat (using a cheap level). I just didn't anticipate there being such a big difference in sizes.
|04-13-2019 12:45 AM|
1st off thanks for using mm like the car was designed (and outside the US uses lol jks )
Im not 100% sure which is what, is that ~5mm difference between the 2 different mid pipes or between the header and one of the mid pipe? Are both the mid pipes the same size and the header is small?
Also are the bolts centered to both or are they off center as well which compounds the problem?
Assuming all the bolts are centered that's ~2.5mm off for each pipe, while not a huge amount it wont be helping with flow between the 2 parts. Depending on the thickness of the flanges you could try and use a die grinder to match them up better being careful not to grind past the weld, but that wont be causing a leak. Try using the digital caliper as a straight edge on the flange and look for any obvious deviations in the surfaces, you should be able to feel it catch on any peaks or see light where there are any troughs.
|04-12-2019 08:00 PM|
Hope you like th Remflex. I love it.
|04-12-2019 06:31 PM|
Well I suppose you do get what you pay for and this might explain some things
Bought a remflex kit. Pretty neat stuff and I look forward to seeing how long it will last.
But in trying to make a gasket that fit the flange on the header better I figured out what might be the source of my problem. Pictures below
|04-12-2019 04:46 PM|
|04-11-2019 07:09 PM|
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|04-11-2019 04:59 PM|
|04-11-2019 04:06 PM|
|Bezik777||I’m having gasket sets made as we speak ... pm if you need a set.|
|04-11-2019 02:41 PM|
have you tried emailing the seller on ebay?
also, you can try and order a dezod header, but according to others, he will take your money and you will not get anything. also i wouldnt even bother with the green headers. the cats clog up so fast, i dont know why anyone would buy them in the first place.
|04-11-2019 02:38 PM|
|04-11-2019 05:49 AM|
Thanks guys for the suggestions. Mathieu that would be interesting to take a look at the tundra gaskets.
@Pnut00 I think it has been blowing out in the same spot so I should take a closer look at the flange and make sure there isn't something weird there. To be honest the more I look at my stock midpipe there is no way it will ever seal against a flat flange like the aftermarket one. Because of the age and rust it's not even close to flat.
Another interesting observation I made last night (although not surprising given the price of the DNA header) is that the exhaust gasket that blew out did not align with the exit of the header very well at all. Below I drew a red circle approximately where the header pipe would line up with the bolts are through the holes. Meaning that the bottom of the gasket would be getting non stop hot exhaust gas passing over it. As suggested earlier I'm going to try and cut my own gasket from remflex material and make sure it lines up much better.
|04-11-2019 03:53 AM|
|Mathieu Bernier||I've got OEM gasket on my header. Those you buy at Toyota shaped like a donut. Since th header is a bit bigger than oem manifold I've bought some Toyota Tundra exhaust gaskets. I can tell you the part number later. Still got the bag at work|
|04-10-2019 08:59 PM|
do they always blow in the same spot? With both the mid pipes?
If so then you can pretty much say that is the weak area on the headers not the mid pipe. Can it be machined flat again? Or can the shop cut it off and weld on a new flange of better quality and flatness?
If the flanges are flat there is no reason it wont seal for these the same as it will for a stock header, if both are using the same flange.
|04-10-2019 08:41 PM|
|humbucker87||A lot of mine are 4, 25 minute sessions each day. So I'd guess I got 7 or 8 hours out of them. They are fast though for 200TW.|
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