Cracked my xs power manifold!

its cracked at the bottom of the collector where the 3 pipes meet the other 3 pipes.

Bad new dude What happen's next?

And what would you like us to tell you?

I hear alot regarding these XS manifolds cracking. I've been given the impression that the quality is piss poor

And what would you like us to tell you?

Not to get XS Power as theyre known to be of inferior quality?

Not to get XS Power as theyre known to be of inferior quality?

Too late!

I would say, if it's cracked once, then you probably have further problems in the future!

Personally i would cut my losses and change it sooner rather than later.

The main problem with SS manifolds, in fact even with other metal's is largely down to support problems, 9 times out of ten you will find that the manifolds that crack have either a big turbo with no supports to offset the weight,

Or have badly designed, or constructed down pipes attached with no flex joints, i have seen expensive manifolds crack just as easily as the cheap ones because of these things being overlooked.

I had a SH XS power SS manifold on my old Supra, and i have no idea how old it was, but its still going strong three years on!

mainly because it was adequately braced and had a flex pipe fitted correctly

I've got a HKS V-band T4 manifold. I hope it's designed well then, as i don't think it's got any supports on it. Been fitted for 12 months, and so far so good.

Bad new dude What happen's next?

i suppose ill SS weld it for the time being, but idealy find another better make manifold. i wasnt too happy with the way it lined up to the ports anyway and making 750hp like that cant be too good for the engine. next dyno run will be running the turbo to its max @ around 2 Bar

I was looking into cast manifolds but i they say not good for over 600hp. or is there a special one out there?

I didnt make any supports myself but the manifold had bars going from the t4 flange to the other flanges so i thought that would be sufficient, but im not convinced that is what has caused it

does anybody have a nice manifold and a good price??

I hear the cast manifolds are beter than SS versions, but i'm not sure what power levels they are good for to be honest.

has anyone tried the cheaper stainless manifold thats not XS powers? its made of 321 rather than 304 stainless (i think its OBX) so i was going to give that a try but not till this time next year, thats assuming that the XS one is only 304 stainless?

I would go for one of Paul Whiffins manifolds but they are far from cheap, you could probably buy another 7 or 8 SS manifold for the cost of a decent one.

I would make a brace to try and support some of the turbos weight

i will do, im going to town now, what about flexi joints on the downpipe?? although im not sure they will flex in the right way??

You are really playing Russian roulette with any cheap manifolds. They are cheap for a reason.

i will do, im going to town now, what about flexi joints on the downpipe?? although im not sure they will flex in the right way??

I would say flexi in the down pipe is an absolute must, OK the rest of the system is on rubber hangers, but the engine has to shift the entire weight of whatever system is attached every time you go on and off the throttle,

Its no wonder manifolds crack, especially with a large turbo sat on top, like i said in the first place its all about weight an inertia!

Its just common sense when you think about it, its surprising any manifold survives without any form of support bracing or flexi pipes.

Ok, I've found a 4" flexi so I'm buying that and using it just after the downpipe and I'm going to make a support for the downpipe to the engine, then support the exhaust in a few more places

How is this at all to do with the tech section

I would say flexi in the down pipe is an absolute must

I agree. The down pipe that came with my HKS kit, has a flexi fitted.

I agree. The down pipe that came with my HKS kit, has a flexi fitted.

Really? Do you have any pics by any chance?

Really? Do you have any pics by any chance?

Not to hand mate, but i'll take a few pics tomorrow if i get a chance

Ok, I've found a 4" flexi so I'm buying that and using it just after the downpipe and I'm going to make a support for the downpipe to the engine, then support the exhaust in a few more places

When I discussed my old XS install with some of the builders here they said at minimum a 6inch flexi should be used, but ideally 8in or more. The 4inch flexi actually has very little flex in it!

The XS ones do crack, mine, even supported cracked after about 15k miles. It's got a replacement XS one on it now (only £150 or so), with an additional 'hangning' support and appears to have been fine the last 2 or so years (daily driver).

When I discussed my old XS install with some of the builders here they said at minimum a 6inch flexi should be used, but ideally 8in or more. The 4inch flexi actually has very little flex in it!

 

The XS ones do crack, mine, even supported cracked after about 15k miles. It's got a replacement XS one on it now (only £150 or so), with an additional 'hangning' support and appears to have been fine the last 2 or so years (daily driver).

That gives me a little more confidence, I meant 4" bore lol

It's 8 inches long so should be ok

I had a cheap SS Autochrome one modified by PRoDrive. I didn't have any problems because my engine and turbo were solid mounted