heefner Posted March 11, 2006 Report Share Posted March 11, 2006 :oops: This is the last thing I expected to blow up. I swapped the rear diff and took it out for a test drive. I hit about 1.3 bar in 2nd and heard a pop and felt a stutter. I thought the engine detonated. I pulled into the garage with a rough idle and and AFR was 17:1. I poked around with a mirror and this is what I found. http://www.we-todd-did-racing.com/wetoddimage.wtdr/wMTIwMzQ3NzZzNDEzZGZkMzF5NTQx.jpghttp://www.we-todd-did-racing.com/wetoddim...GZkMzF5NTQx.jpg http://www.we-todd-did-racing.com/wetoddimage.wtdr/wMTIwMzQ3ODZzNDEzZGZkMzF5NTQx.jpg http://www.we-todd-did-racing.com/wetoddim...GZkMzF5NTQx.jpg Link to comment Share on other sites More sharing options...
chiplee Posted March 11, 2006 Report Share Posted March 11, 2006 wowzer :shock: march that puppy over to EIP. bet you're glad it wasn't something internal eh? Link to comment Share on other sites More sharing options...
DanMitsu Posted March 12, 2006 Report Share Posted March 12, 2006 And what exactly were you doing??? Hmm i guess even the best come apart. (Nitrous back fire?) Link to comment Share on other sites More sharing options...
heefner Posted March 12, 2006 Author Report Share Posted March 12, 2006 No nitrous just a 2nd gear pull through the neighbor hood. Maybe a backfire through the intake? :? Its cracked about 2/3 of the way around. It really doesn't look fresh either. I may have been cracked or stressed earlier and the other day was the straw that broke the camels back? Link to comment Share on other sites More sharing options...
mrdodge01 Posted March 12, 2006 Report Share Posted March 12, 2006 Wow.... kinda sucks, but that's not a very hard fix. I wish somethin like that happened to mine instead of that hole in the piston. Link to comment Share on other sites More sharing options...
ZPI28 Posted March 12, 2006 Report Share Posted March 12, 2006 That sux Kris , but at least it happened close to home. Did you try to cover it up with tape or something and start it to make sure that was the only problem? Hope thats it, and there is no other damage. you have alot of hours in your beast and dont need any other BS.. Steven Link to comment Share on other sites More sharing options...
DanMitsu Posted March 12, 2006 Report Share Posted March 12, 2006 Very true,It does have a slight stain around the area. Especially for the amount of boost, your were kicking. I'll bet he will complain about it cracking on the weld. lol Link to comment Share on other sites More sharing options...
scotty Posted March 12, 2006 Report Share Posted March 12, 2006 Fast and Furious 4 ! Link to comment Share on other sites More sharing options...
Questsi Posted March 12, 2006 Report Share Posted March 12, 2006 That sucks but at least it was close to home and not worse. Link to comment Share on other sites More sharing options...
Funky Phil Posted March 12, 2006 Report Share Posted March 12, 2006 Fast and Furious 4 ! HAHAHA!! DANGER TO MANIFOLD!!!! Did your floor pan fall out? HAHAHAHA! DAMN Kris! You better get me some details and a dynosheet soon. That pic reminds of that Dyno Flash EVO after he upgraded to a GT40R He started blowing manifolds left and right. In the end He laid out 720whp!!I just cant wait to get mine started! Just waiting on a fuel pump and my ENG MANAGEMENT. Where oh where is my ENG MANAGEMENT? phil Link to comment Share on other sites More sharing options...
artinist Posted March 15, 2006 Report Share Posted March 15, 2006 yikes. at first i was looking at it and couldn't tell what that was. that material looks awfully thin. there is a lot of pressure on the intake walls when the boost is turned up. what are you goign to do? Link to comment Share on other sites More sharing options...
TopDawg_43 Posted March 15, 2006 Report Share Posted March 15, 2006 :shock: :x :shock: :x :shock: :x Just as I was thinking about saving up and getting a EIP intake. If I change, I'll prolly just go with Chad's now. Link to comment Share on other sites More sharing options...
Chad Posted March 15, 2006 Report Share Posted March 15, 2006 With a 5" OD plenum (EIP) you have an end plate with 19.63 sq/in, at 18 PSI, you have 353.24 total pounds of force on the 15.7" of weld, or 22.56 # per " of weld . With a 4" OD plenum you have and endplate with 12.56 sq/in, at 18 PSI you have 226.19 pounds of force on 12.5" of weld, or 18.0 # per " of weld. I'm pretty sure (from experiance) that even just 1 " of weld, even on 16 gage 6061 should hold a good 200 pounds or so. Thus I'm leaning toward stress fracture (vibration or heat cycles), not spontanious rupture. It may also be the wrong filler was used, from another site : When considering service at temperatures above 150 Deg F, we must consider the use of filler alloys which can operate at these temperatures without any undesirable effects to the welded joint. Filler alloys 5356, 5183, 5654 and 5556 all contain in excess of 3 % Mg, typically around 5%. Therefore, they are not suitable for temperature service. I use 4043, the same 4XXX series of aluminum used to make forged pistons. the other major type commonly available is the 5356. If they used that, then it would eventualy fatigue and fail, our intakes routenly pass 150*. the thing is, 5356 is generaly advertized as stronger than 4043, but it's not *always stronger in the presence of heat. I'm sure your welder knows, this, but you'll need to take great care to gouge out the old weld material and get the oils out of any scress crackes that remain un-ruptured. If it were me, I'd just cut the end plate off and start wtih a new one. Welded aluminum can be pourous and oil gets into those poors, makes for a lower quality repair than the origional weld was (which ruptured). Link to comment Share on other sites More sharing options...
Boosted_One Posted March 15, 2006 Report Share Posted March 15, 2006 Holy crap! Vinnyy Diesel was right in FNF! You CAN pop the welds off an intake!! That really sucks Kris, always gotta be something man... Link to comment Share on other sites More sharing options...
heefner Posted March 19, 2006 Author Report Share Posted March 19, 2006 I guess its just par for the course really. I would rather have something like this happen now before I get to the track then in the heat of the battle or along way from home. I just ground the entire end plate off and will be putting a new one on. I didn't know what the thickness was and we figured it would be easier prep for welding starting with a new piece. That's some good info on the filler Chad, I will forward that to my welder. I'm also taking this down time to rebuild all my clutch components as well as replacing the rubber line with a braided line. It could have been worse. Link to comment Share on other sites More sharing options...
Boosted_One Posted March 19, 2006 Report Share Posted March 19, 2006 Ya Kris I always look at it that way, it can always be worse. Downtime is a good time to upgrade things and straighten out what you wanted to do last year or the year before. Link to comment Share on other sites More sharing options...
tigertron Posted April 16, 2006 Report Share Posted April 16, 2006 what are the chances of something like that happening to a magna intake? Link to comment Share on other sites More sharing options...
eeaston Posted April 16, 2006 Report Share Posted April 16, 2006 what are the chances of something like that happening to a magna intake? Slim but possible. Whoever modded the intake for RWD welded a plate on the back of the plenum where the TB used to be. If the weld job was poor, or the plate was thin enough to allow flex then it's remotely possible. However, the hole/plate is much smaller in surface area than Heefner's plenum end plate, so the force is proportionally less. Link to comment Share on other sites More sharing options...
tigertron Posted April 17, 2006 Report Share Posted April 17, 2006 what are the chances of something like that happening to a magna intake? Slim but possible. Whoever modded the intake for RWD welded a plate on the back of the plenum where the TB used to be. If the weld job was poor, or the plate was thin enough to allow flex then it's remotely possible. However, the hole/plate is much smaller in surface area than Heefner's plenum end plate, so the force is proportionally less. hmmm I see Link to comment Share on other sites More sharing options...
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