great question. the last piece to go on is the bearing housing end. The housing end is held concentric to the carrier bearing centerline with the 2" bar. Building the center first and installing the tubes second mitigates the movement induced by the welding process. The preload we put in for welding the backbrace helps keep the tube in near perfect alignment. Then welding the bearing housing end on last any of the minute movement that has happened is overridden by the fact the bearing housing end is held perfect to the bore centerline with the bar. We can usually slide the bar through the center with both bearing end bushings installed post welding. maybe its a little snug, but near perfect. The large bearing end bushing i machined also helps with controlling heat saturation. These assmble easy after its all said and done.
good question...we dont use real panhard bars, we use a wishbone. The wishbone is only there to center the housing side to side. the wishbone has a sliding link to allow for the pivot legth differences. If it didnt slide, the suspesion wouldnt move. thanks for the great questions
@@funkhouserracecars the rear roll center is at the height of the average of the Heims in the wish bone. In a side load it forms a lever arm with the center of gravity. High like it is would hurt side bite in a slide promoting skating in my opinion.
@@daleolson3506after further consideration... maybe i answered too fast, im not convinced the wishbone in a parallel drag race style 4-link could have an interaction with roll center. Certainly a 3 link with a panhard would experience the jacking affect...that makes 100% sense. The wishbone is a non fixed link in this case and has no contribution to instant center. I can say ive driven a car with a top wishbone and a bottom theres nothing i can tell making passes in it...but thats ancetdotal eveidence.
What would the price difference be in the tog vs mig option? Any difference other than the weld process? Curious what would be the advantage of a CM rear end other than weight?
Hey buddy! I think MIG vs TIG would be something like 250$ savings...from a pure time to weld standpoint. As for 4130 vs MS, the weight savings only comes from using thinner wall thickness. The weight of the raw material is the basically the same. The tensile strength advatage from 4130 would make.a stronger part, otherwise thats about it. I would still use ER70-S2 to weld it all the together. The real big benefit with 4130 parts is if you heat treat them. They get harder and wayyy stronger. But there will be post process things that need to happen after the parts are heat treated, and you'll need to use proper filler etc etc. It can get out of control price wise. Ive seen some cars running 4.1x with a 3.0" mild steel fabricated housing...non-floater as well...so I feel like where most of my customers live, mild steel makes sense. I can make these from 4130, but the price will reflect.
I was just curious on the CM lol…. Can’t afford that. I would personally be interested in the mug welded housing from a budget standpoint. I’m building the budget S10 and want it nice but mig makes sense for me I think. I was the one that called yesterday on the s10 cage. Love watching your videos and they’re very informative!!
@@RogerBell-k1wI think a mig option would be perfect buddy!! I probably underrate the MIG welded housing just because of my bias towards TIG...but for what you want to do...that would be perfect! This def helps me on my desicion wether or not to offer a MIG version
A bit off topic, but is “Funkhouser” your name or is it a play on words since you fab rear end housings? The reason I ask is my Granny’s name was Funkhouser.
Yeah, my last name is Funkhouser. Ive been told it was spelled different prior to our arrival in WW2...Im not sure if thats true or not. Was that a nickname?? or?
@@ominousrumbling9040lol...i heard plenty when i was growing up. it started to become awesome in high school...and now i have built in brand reconigition
What a beast of a housing! First class product Matt. I did watch the entire video, lots of great information to soak up.🏁
thanks buddy!!!
Absolutely listened to the whole thing. Lots of little tid tib wisdom. Thanks
thanks buddy!
When your done with all the welding do you check the ends of the tubes for run out? As in camber and toe?
great question. the last piece to go on is the bearing housing end. The housing end is held concentric to the carrier bearing centerline with the 2" bar. Building the center first and installing the tubes second mitigates the movement induced by the welding process. The preload we put in for welding the backbrace helps keep the tube in near perfect alignment. Then welding the bearing housing end on last any of the minute movement that has happened is overridden by the fact the bearing housing end is held perfect to the bore centerline with the bar. We can usually slide the bar through the center with both bearing end bushings installed post welding. maybe its a little snug, but near perfect. The large bearing end bushing i machined also helps with controlling heat saturation. These assmble easy after its all said and done.
@@funkhouserracecars it would be interesting to put the hubs on. Set them on jack stands. Pull a tape across and rotate the housing to check run out.
When you have the pan hard bar mounted high like you do,the car will have way less side bite. Do you have any issues with skating?
good question...we dont use real panhard bars, we use a wishbone. The wishbone is only there to center the housing side to side. the wishbone has a sliding link to allow for the pivot legth differences. If it didnt slide, the suspesion wouldnt move. thanks for the great questions
@@funkhouserracecars the rear roll center is at the height of the average of the Heims in the wish bone. In a side load it forms a lever arm with the center of gravity. High like it is would hurt side bite in a slide promoting skating in my opinion.
Yeah, i agree with that...but were not concerned with sliding or turning when it comes to dragracing.
@@daleolson3506after further consideration... maybe i answered too fast, im not convinced the wishbone in a parallel drag race style 4-link could have an interaction with roll center. Certainly a 3 link with a panhard would experience the jacking affect...that makes 100% sense. The wishbone is a non fixed link in this case and has no contribution to instant center. I can say ive driven a car with a top wishbone and a bottom theres nothing i can tell making passes in it...but thats ancetdotal eveidence.
What wall thickness on the axle tubes?
3.5" od, .250 wall
What would the price difference be in the tog vs mig option? Any difference other than the weld process?
Curious what would be the advantage of a CM rear end other than weight?
Hey buddy! I think MIG vs TIG would be something like 250$ savings...from a pure time to weld standpoint. As for 4130 vs MS, the weight savings only comes from using thinner wall thickness. The weight of the raw material is the basically the same. The tensile strength advatage from 4130 would make.a stronger part, otherwise thats about it. I would still use ER70-S2 to weld it all the together. The real big benefit with 4130 parts is if you heat treat them. They get harder and wayyy stronger. But there will be post process things that need to happen after the parts are heat treated, and you'll need to use proper filler etc etc. It can get out of control price wise. Ive seen some cars running 4.1x with a 3.0" mild steel fabricated housing...non-floater as well...so I feel like where most of my customers live, mild steel makes sense. I can make these from 4130, but the price will reflect.
I was just curious on the CM lol…. Can’t afford that. I would personally be interested in the mug welded housing from a budget standpoint. I’m building the budget S10 and want it nice but mig makes sense for me I think.
I was the one that called yesterday on the s10 cage. Love watching your videos and they’re very informative!!
@@RogerBell-k1wI think a mig option would be perfect buddy!! I probably underrate the MIG welded housing just because of my bias towards TIG...but for what you want to do...that would be perfect! This def helps me on my desicion wether or not to offer a MIG version
A bit off topic, but is “Funkhouser” your name or is it a play on words since you fab rear end housings? The reason I ask is my Granny’s name was Funkhouser.
Yeah, my last name is Funkhouser. Ive been told it was spelled different prior to our arrival in WW2...Im not sure if thats true or not. Was that a nickname?? or?
Cool, maybe we’re related. No my nickname growing up is offensive and I wouldn’t want to subject you or your viewers.
@@ominousrumbling9040lol...i heard plenty when i was growing up. it started to become awesome in high school...and now i have built in brand reconigition