M30b34 E30 twin-screw supercharged muscle car

[Eric]

Not gonna doit. But I promise, when they break, I'll tell you about it.

quoted for future mockery.

[Ether-D]

Hey wait a minute... those aren't side pipes?!

It was too much. I wanted to do it, but I couldn't get the passenger side pipe over there without sacrificing ground clearance. That was the thing I was unwilling to sacrifice.


And Eric, I reckon you quoted that so I'd remember to mock the doubters. Thanks for the reminder, but I wouldn't forget something like that.

[Ether-D]

What do you fellers think of the tips? Too ricey? I had the chrome inner tips on there but they seemed a little too far apart so I added the stainless outer parts to make them appear closer together.

[ThatOneEuroE30]

Keep outters remove Inners.

[Eric]

And Eric, I reckon you quoted that so I'd remember to mock the doubters. Thanks for the reminder, but I wouldn't forget something like that.

It's your build, so do what you want...But with all the fab you've talked about doing in the last 4 pages, it seams like you could have done a bit less typing and a bit more welding; then these arms could be done correctly in a few hours.

The M30 is a heavy motor and all longitudinal forces (acceleration/braking) are hinged (literally) on the t-joint fillet welds. In the title of your build you say it's a muscle car & you plan on supercharging the motor, so I can only hope that the car will be driven with some gusto. With the potential forces applied and the weld joints in shear, especially down at the motor mount, I'd really be surprised if your radiator didn't eat some distributor cap sometime in the future. A simple piece stuck in the middle creating an H-beam would completely eliminate all shear potential on the joint. Look at most OEM arms, they are boxed or H-beam for a reason!

What method of welding did you use? GMAW, SMAW? How many passes? SMAW you say? What type of rod?

[slammin.e28]

It was too much. I wanted to do it, but I couldn't get the passenger side pipe over there without sacrificing ground clearance. That was the thing I was unwilling to sacrifice.

One conjunction: Boomtubes.

Flat, low profile, and LOUD.

;D;D;)

[ThatOneEuroE30]

M30b34 E30 muscle car

It's your build, so do what you want...But with all the fab you've talked about doing in the last 4 pages, it seams like you could have done a bit less typing and a bit more welding; then these arms could be done correctly in a few hours.



The M30 is a heavy motor and all longitudinal forces (acceleration/braking) are hinged (literally) on the t-joint fillet welds. In the title of your build you say it's a muscle car & you plan on supercharging the motor, so I can only hope that the car will be driven with some gusto. With the potential forces applied and the weld joints in shear, especially down at the motor mount, I'd really be surprised if your radiator didn't eat some distributor cap sometime in the future. A simple piece stuck in the middle creating an H-beam would completely eliminate all shear potential on the joint. Look at most OEM arms, they are boxed or H-beam for a reason!



What method of welding did you use? GMAW, SMAW? How many passes? SMAW you say? What type of rod?

Also reinforcing the subframe will help handle the power and weight of the motor. Cause over time with weight and power it's not a matter of if but when you will twist your subframe and bend the shit out of the mounting points cause the m30 way heavier then the m20.

[Ether-D]

It's your build, so do what you want

Thanks!

...But with all the fab you've talked about doing in the last 4 pages, it seams like you could have done a bit less typing and a bit more welding

Be a bit more polite if you want people to listen to you. Also, spell check.

then these arms could be done correctly in a few hours.

How many e30m30 mounts have you made? Seems like you've made quite a few.

M30 is a heavy motor and all longitudinal forces (acceleration/braking) are hinged (literally) on the t-joint fillet welds. In the title of your build you say it's a muscle car & you plan on supercharging the motor, so I can only hope that the car will be driven with some gusto. With the potential forces applied and the weld joints in shear, especially down at the motor mount, I'd really be surprised if your radiator didn't eat some distributor cap sometime in the future.

I'd prefer to think the distributor cap will be eating the radiator. ;D

A simple piece stuck in the middle creating an H-beam would completely eliminate all shear potential on the joint. Look at most OEM arms, they are boxed or H-beam for a reason!

They are also made of stock that's less than 1/4 the thickness of what I used.
Yes, the piece in the middle will make them stronger. I will gladly eat crow if they ever bend in any way. This is how I do things. If they break, I will fix them and I will know that they should have been stronger. But if they don't break, I will know that they were great, and I will not mock you for it.

What method of welding did you use? GMAW, SMAW? How many passes? SMAW you say? What type of rod?

I used a lincoln MIG welder. Flux core .035 . Many passes.

In closing, don't stroll up into someone's build thread and get all critical of shit without saying one nice thing. :???:

Good day sir.

[GnarShark]

Haha holy sh!t, you are really turning this into a hot rod!!! This will be so rad!

Sub'd

[nighthawk]

Also reinforcing the subframe will help handle the power and weight of the motor. Cause over time with weight and power it's not a matter of if but when you will twist your subframe and bend the shit out of the mounting points cause the m30 way heavier then the m20.

I thought the m30 was actually not that much heavier than the m20?
Especially without ac and relocated battery. I remember reading people with these swaps saying that the weight is always exaggerated.

[ThatOneEuroE30]

I thought the m30 was actually not that much heavier than the m20?

Especially without ac and relocated battery. I remember reading people with these swaps saying that the weight is always exaggerated.

From my personal experience that sob is heavy.

[Ether-D]

I'm gonna have to weigh it. Iiiiiiiregardless, I'm adding at least 40lbs of supercharger to it as well.

[ThatOneEuroE30]

Imo is reinforce the subframe it's 15 bucks and 30 min of welding that will save you a head ache.

[CorvallisBMW]

One conjunction: Boomtubes.

Flat, low profile, and LOUD.

;D;D;)

Totally do-able:

[ThatOneEuroE30]

^ that awesome haha