well to my knowledge of welding, the welded part is suppose to be stronger then the surrounding metal it self. in thoses pic i only see cracks on the welds.

 

^ the weak welds caused the aluminum bulge around the supports straps of the plenum from 30psi of boost? yeah, the welds arent that great, penetration wise, but stil........

cheapo 3/4" nylon garden hose has burst rating of 140 psi.

 

Your photos do not show a manifold defect. Look at the damage and then consider the order of pressure it would take to force that level of damage.

When you have alky or meth or nitrous and fuel in the intake system, it is similar to a combustion chamber in terms of pressure if you have a backfire. No matter how well constructed the manifold, backfires generate internal pressures orders of magnitude higher than the boost that your turbo is providing. The pressure has to go somewhere. I've heard very knowledgeable people say that this kind of result is often the best of the damage alternatives, as you just take it off and repair or replace it. Otherwise, the other kinds of damage are much more costly.

Magnus Motorsports has a very strong history of standing behind their products if they fail under anything but obvious backfire circumstances. I'd contact Marco, show him the pictures and/or send him the manifold back, and get some good information.

 

Damn!

 

HOLY MOLY!!!!

Thats crasy!

 

Here is some good advice for whatever manfild that you are running if you have a high HP car and/or run a sheetmetal manifold with high boost. This $65 piece would have saved all of those blown apart manifolds out there. It basically acts like a relief valve, allowing the excessive pressure to vent to the atmosphere in the event of a backfire and prevent the manifold from blowing apart. I install them on all sheet metal manifolds that I install. IMHO it is a must have item for everyone running nitrous and good insurance for those running high boost alone. you can even add one on each side for added safety

 

The old intake manifold blow off valve trick, eh?

 

its going to happen with any manifold with a meth backfire, **** happens, time to get a jm fab

 

Don't Backfire your engine and you don't have to worry about breaking manifolds.

 

Impressive

 

The welds dont penetrate properly, same thing happened to our shop car. Now we use the AMS VSR

 

I wish I can dig up the pics of my buddy's JM Fab manifold that bulged but didn't crack after a nitrous backfire. I know I have it somewhere...

 

i have had 2 magnus intake manifolds crack/ split like this but not as bad before. i was running a max of 29psi, no alchy, met, or nitrous. finally went with AMS VSR

 

Sorry, bunch of you guys are not correct.

I've had 3-4 of these intakes break just like this on customers cars. BUT I will say that Marco changed how he was building them and does repair them for free, if it makes you feel any better. Is the intake that blew up old? I don't know that I have heard of any of the newer ones breaking like that but then again I think everyone I knew that was running them have changed because they broke......

I don't believe you had a backfire/misfire, I believe it just failed as I have seen others do.

 

If Marco replaces them, well that is reassuring.

However his absence in a thread like this is dissapointing. Would be good to get the manufacturers take on this.

I run the Magnus Race and it has been good for me up to 2.4 bar. Not many miles on it though. If it breaks, and Marco replaces, well I'm ok with that. Hopefully it will fair well in the mani test ifarted2 is doing.