Amber Gramps

How the heck did you miss that last year?????

Re: "Amber Lamps"

Thread:
https://rennlist.com/forums/off-topi...s-whoopin.html

Post:
https://rennlist.com/forums/7328864-post190.html

Really good reason to pay for membership...

Ed Hughes

Yes, too marginal a gain to justify the expense.

Amber Gramps

I had to go to google to figure out what "extrude hone" was:

http://forums.pelicanparts.com/porsc...intake-tb.html

dshepp806

Don't go to the OT too much at all......I will occasionally step in and jab but retreat quickly (once I'm done)...
.......caught the RUSH T-Shirt thingie....

This upcoming thread from Ed will be a good reason to pay for membership!

As to RUSH relationals (to the video URLs), clearly this piece from "Kid Gloves" (RUSH) is resonating:

Anger got bare knuckles
Anger play the fool
Anger wear a crown of thorns
Reverse the golden rule
Then you learn the lesson
That it's tough to be so cool

Handle with kid gloves
Handle with kid gloves
Then you learn the weapons
And the ways of hard-knock school
Put on your kid gloves
Put on your kid gloves
Then you learn the lesson
That it's tough to be so cool

Back to Ed's thread............................................

Best,

Doyle

Peter Zimmermann

Well, I found my tech article file, and the one I'm thinking about isn't there. I will continue looking, but I don't have much hope that it survived all of the moves, changes, etc. Rats!

Ed Hughes

Pete-No worries. The fact that you remember this being an issue you've seen is comforting to me. I was scratching my head yesterday trying to figure out how this could happen.

rusnak

Maybe the body twists upward? In other words, the floor could be bowing in the middle, and accel/decel or braking might be causing flex.

I noticed that the Cabs have a different motor mount than the coupe or the Targas. I think they were planning for body torsion, or twist from side to side, but I doubt that would cause those tears. I wonder if you could rig up someting to measure front to rear flex?

What to the motor mounts look like? Are they oblong? In which direction?

Ed Hughes

I don't think that you can tear this with flex. I've actually done a lot more track time prior to my build than I have in the last couple of years, so if it was going to happen from flexing, I would've expected it then. In fact, with my chassis much stiffer now, I'd think there would be less flex. Motor mounts are fine. If there was a heat treatment issue or whatever as Pete remembers, maybe mine just took longer to show up.

whalebird

Rusnak, that's pretty much the argument against a targa or cab - there is a flat floorboard between the front and rear, held only by the door latches. I've never seen one, but I've always thought it would help to make a brace to replace the targe "top". A trussed unit that would attach using the same hardware(pins and latches) as the original top - just welded to tube structure that could be removed just like a targa roof.
Anyway, I don't think it makes a huge differance as long as Ed caught it in time.

Shepp, "Kid Gloves" and P/G will have to go PM. It gets pretty soupy in OT sorry to send you there.

rusnak

I wonder if there would be micro tears or ripples in a coupe at the B-pillar? That would be a point of stress. I could see how the floor would be a huge pivot in an open car, unless the rollcage were triangulated front to back across the passenger area.

I don't know how that engine mount tore. It couldn't happen with just heat from the muffler. I have to go check mine this weekend.

whalebird

Good point rusnak. Thats why Porsche and any other carmaker spotwelds a unit-body - it allows a perscribed amount of flex. It's common to "seam weld" race cars where all the sheet metal in the tub is connected with a continuous weld. Spot welds allow the structure to flex a bit, otherwise the chassis structure will begin to split apart at the seams. This is fine for a dedicated race car(limited life span), but spells the end for a street car.
I think Ed's failure comes from being in the most extreme environment on the car. Peter's got this figured out.

f4 plt

What is the lift? I have the Snap-on lift and built similar ramps out of 2x 4' I laminated together. less clutter than a four post Nice garage

Ed Hughes

Bendpak

SeanR

Subscribed for following.

Well done Ed.

pmason

Here is what I did to stiffen up my Targa. Now I didn't notice much flex before, but deffently can tell a difference when the rollbar was installed. Even before this the shop I take the car to commented that it was pretty stiff, in that it didn't sag when on the lift and the doors remained lined up.



This was last winters project, this year I'm putting on headers.