Another cracked manifold
Originally Posted by Mike@Forge
I love you Miguel, but in all seriousness, this thread is completely pointless.
You've started no less than 3 threads about exhaust leaks.
- This one
Here: https://www.evolutionm.net/forums/sh...d.php?t=205792
And the original: https://www.evolutionm.net/forums/sh...d.php?t=205518
I fail to see any reason for there to be 3 separate threads for this one issue even if it happens to be in a new place. It's still an exhaust leak, and you're still worried about how much of a power loss an exhaust leak will cause.
Firstly, just keep the individual issues in the same thread as the problems are so similar as to be considered the same problem altogether.
Secondly, what difference does it make how much power is being lost? Just fix the leaks instead of wasting time starting new threads about it, and you'll instantly gain back any power that was being lost due to the leak, whatever amount of power it happened to be.
You've started no less than 3 threads about exhaust leaks.
- This one
Here: https://www.evolutionm.net/forums/sh...d.php?t=205792
And the original: https://www.evolutionm.net/forums/sh...d.php?t=205518
I fail to see any reason for there to be 3 separate threads for this one issue even if it happens to be in a new place. It's still an exhaust leak, and you're still worried about how much of a power loss an exhaust leak will cause.
Firstly, just keep the individual issues in the same thread as the problems are so similar as to be considered the same problem altogether.
Secondly, what difference does it make how much power is being lost? Just fix the leaks instead of wasting time starting new threads about it, and you'll instantly gain back any power that was being lost due to the leak, whatever amount of power it happened to be.
Thread Starter
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From: Lake Mary,FL
Another cracked manifold
Well, i was checking my oil yesterday morning, i happened to look at the megan manifold and discovered not 1 but 2 cracks!!! Theres a big crack on the back of the manifold in the middle and one by the welds in the middle.. I also discovered that im missing 2 bolts on the o2 housing!!
My car has been running like this i guess for some time now with leaks every where.. This week im gona order a new gasket and new o2 housing bolts and put the stock manifold back on.. I dont know what im gona do with the megan one yet. The weird thing is that even with all these leaks, the car still pulls pretty hard, but i bet im loosing quite some power from these 2 cracks and missing o2 housing bolts.
My car has been running like this i guess for some time now with leaks every where.. This week im gona order a new gasket and new o2 housing bolts and put the stock manifold back on.. I dont know what im gona do with the megan one yet. The weird thing is that even with all these leaks, the car still pulls pretty hard, but i bet im loosing quite some power from these 2 cracks and missing o2 housing bolts.
Thread Starter
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Joined: Aug 2004
Posts: 4,111
Likes: 1
From: Lake Mary,FL
Originally Posted by MANGOOK
Could the cracks be caused because of the missing bolts. Extra stress on the other mounting points?
Originally Posted by fsugatorbait
No offense, but is this really worth another thread. It's getting pretty old, but hey at least you didnt ask how much power you are losing
who the hell installed your parts because you seem to have missing bolts all over
Ahhhh.....Almost all tubular O2 housings are known to crack. Some actually seem to cause a higher level of knock. I'm not aware of any aftermarket manifold that can hold its own with a ported stocker.
As for bolts on the O2 housing. Mine come loose all the time, even with loctite on them. After every lapping day I have to tighten them back up. The extreme heat then cool down along with the continuous hardshifting works those things lose.
My opinion on the ebay O2 housing is kind of negative. I really dont think you gain anything. I've gone back a fourth a couple times to see if I noticed a difference in spool or seat of the pants difference in power but it didn't make a noticable difference at all. I left it on for benefit of the doubt only.
As for bolts on the O2 housing. Mine come loose all the time, even with loctite on them. After every lapping day I have to tighten them back up. The extreme heat then cool down along with the continuous hardshifting works those things lose.
My opinion on the ebay O2 housing is kind of negative. I really dont think you gain anything. I've gone back a fourth a couple times to see if I noticed a difference in spool or seat of the pants difference in power but it didn't make a noticable difference at all. I left it on for benefit of the doubt only.
That's what I'm getting at.....Even if you torque those bolts to spec AND loctite them (if you run the car hard) eventually they will work themselves loose.
I think both the SS manifold and O2 housing are blig rice mods. I'm Jeff Jeske and that's my opinion.
I think both the SS manifold and O2 housing are blig rice mods. I'm Jeff Jeske and that's my opinion.
Jeff how can you say the o2 housings dont make more power? Its been proven sir. You not feeling the difference with your butt is completely irrelevant. Also I've rarely seen the o2 housings crack. Its almost always the ss manifolds
I wouldn't say that the O2 housing power gains have been proven.
As far as I know the only dyno test performed was by Buschur and he picked up 13WHP but raised boost in the process.
As far as I know the only dyno test performed was by Buschur and he picked up 13WHP but raised boost in the process.
