Blooze Own: An F355 Six Speed N* Build Thread (Page 65/126)
aaron88 FEB 27, 12:56 AM
I use cad for a lot. Doing the design I set up a two dimensional parametric drawing with vector style graphical stress drawings. That way I can grab the suspension with my mouse and watch all the geometry, roll centers, stresses and stress directions change in real time as I move things around. Definitely a fast way to do things.

I'm using custom knuckles, so that design is still wide open. I've been posting a bit in this thread:
http://www.fiero.nl/forum/F...2/HTML/117227-9.html

I really want to use rod ends but one of my design criteria was to use off the shelf common parts from auto parts stores. And I hate the lifespan of rod ends, but they are just such a great design.

How much body roll did you account for in regards to tire deflection for the rear. I got .6 degrees (about 25lb tire pressure on 275 tire).

.
Bloozberry MAR 05, 02:24 PM
Aaron, I didn't consider tire deflections in my analysis. I knew what size tires I wanted and figured there wasn't much I could do about changing sidewall stiffness without changing the look.

I got a pleasant surprise email today saying that my wheels had arrived a week earlier than expected! It was a real pain in the derriere to get a Motegi rep to confirm that the front wheels I wanted would have enough clearance depth-wise behind the spokes for the brake calipers. The 7" wide and 48 mm offset front wheels didn't appear as though there would be much room left. In the end it took three weeks of badgering countless people before someone finally said the best they could do was assure me they would fit, however there would still be a no-return policy given the "special-order" nature of the wheels. This, after giving them a scale drawing of my front and rear suspensions complete with every dimension you could imagine. The level of ineptitude is mind-boggling sometimes.

I can happily report that my worrying was for nothing... I ran home with the bare rims to check out the fitment before potentially wasting money mounting the tires... and the fronts cleared everything just fine:





I loaded up the tires and wheels and headed out to the tire shop for mounting those bad-boy rubber shoes...



And getting them balanced...



And finally made my way home to stick them in the fender wells. I'm very happy with the look despite the fact that I have to use my imagination to envision the fiberglass changes that are forthcoming:



Here's the rear quarter view from before, except this time there are wheels attached to those tires!

[This message has been edited by Bloozberry (edited 03-05-2013).]

RCR MAR 05, 08:42 PM
Looks good, Blooze...

Bob
doublec4 MAR 05, 09:41 PM
Nice choice on the wheels! Things are shaping up!
Bloozberry APR 01, 09:28 PM
Well, it's been a while since I updated the thread because I've been busy restoring a customer's '46 Willys Jeep. That's finally out the door and now I can concentrate on the Blooze Own.

I created a pattern for the cuts needed to the 2" X 3" rectangular stock to form the cradle side rails. It starts out as a 1103 mm long tube and ends up being 977 mm long after it's been notched and formed into shape.



I measured twice then marked up one of the tubes in preparation for cutting, then used a die grinder with a cut-off wheel to make the first slice.



The die grinder was just waaay to slow for me so I used an angle grinder to make the largest part of the cuts...



...then used the die grinder with the thinner wheel to make the finish cuts. I was pleasantly surprised at how accurately I could slice out the pie sections with the angle grinder.



Here's one cradle side rail with all five notches. I also bevelled each cut edge to make a vee to increase the surface area of the tube where the welds would be.



I used a crowbar and an adjustable bubble level to bend each section to the correct angle then tack welded the notch in preparation for final welding.



I prefer not to grind the welds flush after they're completed since the extra material adds strength to the area.



Here's the final product: One new modified cradle side rail awaiting it's identical twin (BTW, it's laying on it's side in this picture).



(edited to correct length of tubing required)

[This message has been edited by Bloozberry (edited 04-06-2013).]

Sage APR 01, 11:13 PM


Very impressive!

As always, nice work. Wheel/tire combo looks great too.

Glad you are able to get back at it. Looking forward to future progress.

HAGO!
RCR APR 02, 06:04 PM
Very impressive (as usual), Blooze... Looking forward to seeing what you have up your sleeve...

Bob
Yarmouth Fiero APR 04, 07:15 AM
That first frame looks great Blooz. You are right about those thin zip wheels, they do a great job in steady hands. I recently got some ultra thin wheels at a trade show just to try them. Wow, they don't last as long but they are like using a surgeons scalpel. I was cutting 2 x 3 x 1/8 twice as fast as my 14" chop saw.

Are you planning to have your final cradle welded completely closed or leave it open on the ends or perhaps some well placed lightening holes? If you leave it open, have you considered having it hot dipped galvanized before you paint it? In Halifax, Argo Protective Coatings does all our shipyard work and they do a nice job. The key is to have openings in every part...... or they'll make them for you.
Bloozberry APR 04, 04:51 PM
Thanks Sage, RCR, & Yarmouth! For Yarmouth, I've been thinking about sealing the insides of the tubes but I was only considering primer until you mentioned possibly getting the whole cradle galvanized. I'll have to look into what it would cost. The downside to galvanizing is that once it's done, it makes it a lot more difficult to make any changes that need welding. The galvanized coating makes some pretty noxious gases, not to mention making terrible looking welds unless it gets ground off.

I got the second cradle side rail made up yesterday... I was careful so both are straight as an arrow and are identical measurement-wise. I left both of them several inches too long at the back end so that I could make any adjustments in length later on.





Now to get working on the cradle cross members. Rather than weld the lateral link mounts and the rear cradle mounts on the side rails at this stage, I think it would be better to complete the square box of the cradle first. That will allow any warpage or inaccuracies that creep in as a result of that process to be accounted for when welding on the various mounts later.
fieroguru APR 04, 05:25 PM
Looks great except one thing... aren't they supposed to be mirror images of each other? It looks like they are an exact duplicate.