Hey guy i've been working on my rx7 here and there whenever i have time to work on it. It been a long year. I was hoping to of had it on the road the past summer but that didn't happen. Looks like Joe will be building my engine in a month or so. I'm almost done my centre consol and dash. I added and changed a lot of things on the car this past here.

This is what the car looks like



Garth and i made a wing for the car.







Powdercoated the wing satin black


Then i modifed the cage. I cut the old door bars off and welded some in once in.





Then i painted the cage satin black

 

Then i cleaned and painted the engine bay satin black







Then i took the front apart, front control arms, subframe, end-links swap bar, all nuts/ bolts and powdercoated it all. Also put in new pulyurethane bushings.

 

Then i did the floor.







.

Now all thats left is the dash, building the engine, wiring up the car and tunning.

 

Great work. I really like the detailing and planning that has gone into finishing it all off correctly.

Just one concern, the load path in a collision makes the side door bars dangerous. A side impact will bend the bar in 2 places and turn the bends into sideways spears. In a frontal or rear wards impact, they will fold upwards at the bends and may stab your head or upper body. The brace behind the rear seat could be raised about 3 inches to join in a common welding point with the other bars. This will allow a better load transfer across the cage and reduce built in collapse points.

There is a reason why in almost all sanctioned racing series (not including drag racing) Drivers door bars have to be straight or bellied outwards. They also require some bracing to minimize flexing or collapsing in a direction that could impact the driver. I would suggest replacing the bent side door bar with a straight bar connected to the 2 existing main cage pick up points or as a better bet to have it triangulated to the base of the front hoop and to the back main hoop at the juncture with the rear bars that extend to the shock towers. You can go to the CASC.ON site and find suggested configurations.

The car will be a bullet and I would hate to see anybody injured if something untowards happens.

Just my semi knowledgeable $.02.

Eric

 

Hey that first pic, the Magnus dyno, when were you there? lol

 

Hey Eric Thanks for the info. I'm not to worried about it the car was build as a showcar and the cage itself would never pass tech. I'm never going to road race the car in a series. I made the door bars the way i made them because its easy to get in and out of the car this way. This is only going to be a street car and it will maybe hit the drag strip a couple of times and it will pass tech there. I also don't plan on street racing the car because i wouldn't want something to go wrong and end up killing myself and/or someone else.

Luke

Yes thats the dyno at Magnus. We took the car there a year ago.

Luke

 

When are you going to ditch the 19's Luke? Car is looking great btw (I was there yesterday picking up the white FC)

-Taylor

 

Hey Taylor, how was the ride back home. Ill be powdercoating the rims gunmetal within a week or so but when i do take it to the track i have a set of 16s ill be running on it.

 

Oh. My. God.

It was 6 hours of white knuckles at 70 km/h. those tires were so slippery that in 5th gear, 70 km/h, MAYBE 2k RPM, the engine decel was enough to break the rear end loose. I would've pulled over and slept for a few hour somewhere, but the Microtech isn't programmed for coldstart yet!!! It was a nightmare....

Sweet, yeah I didn't think the 19's would fare so well on a track, too much camber for clearance and major weight. I saw that the camber plates were maxed out negative. Anyways, can't wait to see what that RE will put out, that's going to be a seriously sick car! What will you be running for a turbo?

 

Sounds like it was a crazy ride back but you made it home. I also have a camber kit for the rear that i haven't installed but will in time. That should fix all the camber problems in the rear. I'll figure somthing out for the front. I have two turbos i could use, a got a borg warner s478 with a t6 1.35ar and a t04r garrett turbo. I think i'm just going to go with the t04r just because i want it to be fun to drive. My plan is to run the t04r with the meth injection kit that i got custom made for the car. I'm hoping to run around 25-27 lbs of boost on pumped. Were going to do a lot of different things with the tuning. We want to try a couple different things and see what number it can make.

Luke

 

It's pronounced SPOILER.

 

I guess you could call it that but really its a downforce wing.

 

Nope, it's a spoiler. Spoilers can produce downforce too, but I HIGHLY doubt that one does, it's far too flat.

A wing has an airfoil shape and divides the incoming air on top and bottom at the leading edge. The air is accelerated over one side of the wing, which causes the pressure to drop, which causes the wing to be pushed in that direction by the other side at higher pressure.

A spoiler is a continuation of the rear of the car, attached to the surface and modifies the airflow over/off the back of the car, whereas a wing operates more or less independantly (it is affected by the airflow over the car though). A spoler produces downforce by re-directing air upwards, transfering momentum to the air which in turn exerts a reaction force on the car (downforce). That spoiler in the pictures is set entirely flat, which can provide some significant drag reductions, which is what drag racers use them for, but won't be capable of making any sort of downforce. My money would be on it creating lift.

See: http://www.fatcatmotorsports.com/iga...o_articles.zip for some good reading on race car aero. You'll see in V15N2 that a zero angle spoiler creates lift in their example.

 

You say toe-may-toe, I saw toe-mat-oh

 

Nope, they're NOT the same thing. They operate in fundamentally different ways and there is a clear distinction between the two.

 

Wow.. does it really matter?
Luke made the thing, so he can call it whatever he wants.
Unless he tries marketing it, we really don't have a say.

I still giggle at the Depot-mat deadening ;D

 

I'm just trying to correct the incorrect information posted above and spread some knowledge to those who might not have the advantage of having studied aerodynamics at University like I have.

 

Academics and the real world are two very different things... if they want to call it a big floppy donkey dick, who cares. Like someone said, they aren't selling it to the public. What I implied with my previous statement was that different people have different names for things. Not that they are the same thing.

I haven't taken aerodynamics at school but I would be interested in learning more. How would they optimize the design?

 

The best place to start would be to read the articles in the link I posted. There's some good reading in there full of CFD testing backed up by the author's extensive knowledge and wind tunnel experience.

Optimization takes testing, CFD can get you very close, but in the end the wind tunnel tells it all. That said, using the general lessons learned from other cars, you can get a reasonably good setup with little to no testing (for instance you want a wing, and I do mean an airfoil wing, to be as high up and as far back as possible, generally restricted by the rules).

If he called the engine a transmission, I'm sure there'd be others correcting him (I've actually corrected him on the wing/spoiler thing before). Proper nomenclature is ESSENTIAL for clear, accurate communication.

 

Nice Wing.

 

I totally agree. But this is the internet, and its full of people who got their engineering degrees from message boards. There's no convincing anyone of anything here.

 

Wing or Spoiler....rotory or rotary.....psi or pounds.....ft/lbs or lb*ft.....their or they're.....it's or its......come on, we're all friends. We can try to correct each other, but it's really hard to convey the spirit in which the correction is being offered and we have to be mindful of whether or not it's even welcome. Misinformation seems to abound on the internet, but what's nice about people sharing their ideas is that they typically spawn new ideas....it's all about creativity.