Catorce

Very nice cars. Honestly, I think to be super competitive you need to have a 911 of that kind to do the job. There is a reason why Porsche races 911s rather than 928s....I just have a 928 soft spot.

Love your orange color scheme as well!

Catorce

Okay so the title is misleading; Der Panzerwagen would absolutely get smoked by an RSR in reality. However, I have noticed some interesting comparisons between the two:

Track - almost identical
Tire size - same on the 928 as on the RSR
Weight - Similar, with an edge to the 928
Power - almost the same
Overal width - within a half inch.....928 is 79", RSR is 78.8

The track and width figures are interesting particularly because the 911 has grown into a 928 sized car, and at 79" wide, Der Panzerwagen is much wider than most 928s, which should give it some pretty sick grip.

From an aero perspective, the RSR incorporates diffusers, low side skirts, and cut off rear half wheel wells. Why shouldn't the 928 have these things too? No, I don't have a multi million dollar wind tunnel budget, but it stands to reason that some of these aero bits should work on the 928 as well....

Soon I will be rerendering the massive splitter in carbon as it is heavy aluminum right now. On this car, Devore did nothing by accident, so I have to assume he made the splitter so big on purpose.

So what do you guys think - flat side skirts, low to the ground (in carbon), a flat undertray, a diffuser, and vents on the rear half of the wheels to let he high pressure air out.

YES its a shot in the dark with no empirical wind tunnel evidence....but what do you all think?

jcorenman

We saw Joseph's 928 race car at Sharktoberfest a couple of years ago, very nicely built. It is certainly worth a look if you have a chance.

GregBBRD

Seems like this car has big fat tires and supposedly "trick" pieces on it, but has never gone around a track faster than a milk truck.

I'd suggest keeping it as simple as possible, getting it running, and getting some serious seat time.

Learn what you can do, then explore the limits of what the car can do.

Increasing "stick" decreases the messages that the car sends to the driver....and to go fast, you are going to need to understand what the car is telling you.

Keep it soft, keep it balanced, keep it simple, keep it predictable, .....learn what it is telling you. Figure out what changes to the suspension do to the car, then start worrying about increasing the unpredictableness of the car.

The best money you can spend....a decent set of modern triple adjustable shocks....and then someone who has a clue on how to set-up the car.

Next step: Get some new generation adjustable ABS and fit it onto the car.

Unless you are one of the guys that likes to sit around and talk aboit how fast your car "should" be or "could" be, forget "trick" until you can drive "simple".

Catorce

Fair enough, but the fun part at this stage is the "what if". Also as far as I can tell, the car has NEVER gone around a track....the tires still have the stickers on them.

Gimme a recommendation on shocks...are you talking JRZ or Motons, etc?

GregBBRD

Either JRZ or Moton....essentially the same....same mothers and fathers.

Remember that 928s are pretty happy softly sprung and droop is important.

Talk to someone that understands travel and what basic needs you have.....not the first idiot you find on the Internet who spews a good line of bullsh!t.

I'd suggest you call Cary at ERP.....

Randy V

Hey, but that's how we found you.


Kidding, kidding!

medipedicman

Can I save this?? I think I needed to hear this for my own situation.

Catorce

Yeah honestly, it's decent advice but actually not the way I roll typically. Everyone has their own way of doing things, their own system, and advice that's a little to syrupy tends to make me chafe.

I've been holding back a little here, but I think it's time to kind of state my MO. Every serial killer has one

I have been driving fast cars for 25 years, with only one track session in the form of the Porsche Advanced Driving School. I just set up the suspensions on two of my cars, each one with a different purpose than the other.

Keep the following in mind about me:

- I never start simple. I start with what I perceive to be the best and I go from there.

- I am a lot like Devore in the sense that he enjoyed the mechanical design and tweaking probably as much as he enjoyed the driving, if not more.

- I basically already know what I want and what direction I want the build to go. Sometimes I have the semblance of asking for advice but I am not sure I actually mean it.

- I can and will build everything and anything on this car and do stuff no one else has seen if I think it will improve the car. I want to kind of dispel the idea that I might be a noob on this build....This is my FOURTH 928 and I have a frigging 4000 pound CNC Mill in my garage for chrissakes. I built four Porsche motors in the past 12 months. My mechanical skills probably exceed your average shadetree dude.

So yeah, thanks for all the helpful PMs and phone calls, much appreciated, but we're good guys, we're good

Carl Fausett

When I was looking for my own racer car, the $1000 per corner for the Motons put me off. I thought "there has to be something between say, the Koni option at $900 for all 4 and the Moton option at $4000 for 4, right?"

That's when we developed the PRO shock kit:
https://www.928motorsports.com/parts...ension_kit.php

Been very pleased with them, aluminum shell, twin-tube design, true double-adjustable, and our price includes springs and spring perches and mounts all for $4300 (all 4 corners).

I will agree with Greg that a good 600/400 spring and shock package can take you a long long ways, even if its just Koni's... allowing you to sort out the car and learn how she behaves before making a big suspension investment. You have a lot of modified/custom suspension links on that car and you might want to make sure they are functioning as intended before throwing yet more variables into the mix.

Just a thought.

Catorce

Carl,

Wound up picking up a set of double adjustable custom Konis from Darien Nunn. For whatever reason, if I am reading the part numbers right, my car currently has 1000s on all four corners!!!

The Konis that are currently on the car (besides being rusted and ugly) are all out of ride height adjustment in the front, where they are still way too tall for my liking. The ride height out front is almost stock it's so high, so they just jacked up the rear to suit. Looks like a 4x4.

So I will fiddle with the new Konis and see how it behaves and go from there. They were practically free anyways.

Carl Fausett

Good grab! But that spring rate on all 4 corners is likely going to over-steer, and may have a hard time putting the power down especially on corner exits. I would worry that the 1000lb rear springs would be too stiff to allow the rear suspension to do its work. It will depend on what your finished weight and weight-biases comes in at.

Generally, the 928 seems to like a spring rate package where the rears are about 65% that of the front.

That's a front/rear spring rate like the 600/400; or 800/550, etc.

But I know you have other racers and experience, so this is just an FYI about something you probably already know about.

Randy V

So instead of between you went for the outside upper.

Rob Edwards

This is with no engine in the car, correct?

Carl Fausett

Randy -

Maybe you didn't understand what I wrote.

The price for the Motons is for the shocks only. You still gotta buy race springs and spring perches and hardware.

The price for our PRO kit includes the springs, spring perches, and hardware. The PRO shocks are less expensive so
we are able to do this for the same price as just the shocks only if buying Motons.