Group B RX-7

Gravity Fed Wrote:
-------------------------------------------------------
> is that an oil cooler hiding in the spoiler?

Yep.
And notice those rear calipers?
>
> -------------
> "The beatings will continue until moral improves"

---

John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

im curious how they work the oil system. Im going to guess it was a dry sump.

---

First Rally: 2010 First RallyX: 2004 (a bunch)
Driver (0), Co-Driver (7)
Organizer (3), Volunteer (3)
Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5)
Last Updated, Apr 9, 2023

john vanlandingham Wrote:
-------------------------------------------------------
> Gravity Fed Wrote:
> --------------------------------------------------
> -----
> > is that an oil cooler hiding in the spoiler?
>
> Yep.
> And notice those rear calipers?
> >
> > -------------
> > "The beatings will continue until moral
> improves"
>
>
>
>
> John Vanlandingham
> Sleezattle, WA, USA
>
> Vive le Prole-le-ralliat
>
> www.jvab.f4.ca


Front calipers on the back? Or that they're "backwards?"

---

Welcome to the cult of JVL drink the koolaid or be banned.

those certainly are not an oem caliper of rx7 origin.

---

First Rally: 2010 First RallyX: 2004 (a bunch)
Driver (0), Co-Driver (7)
Organizer (3), Volunteer (3)
Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5)
Last Updated, Apr 9, 2023

Gravity Fed Wrote:
-------------------------------------------------------
> those certainly are not an oem caliper of rx7
> origin.
>
> -------------
> "The beatings will continue until moral improves"

The are without a doubt an AP with 4 x 1.25" pistons.


point is some pretty big calipers--even if the pistons are't so big---with big pads on the rear of what is a pretty mundane spec car.

---

John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

IE someone at Mazda understood that to drive really fast one needs really good brakes even if there is not much power, low traction and simple spec.

As I like to say when I drove in Gp2, sure they may have AWD but we all have 4 wheel brake and Gp2 cars are lighter. A Subaru will accelerate faster but a Golf will slow down quicker.

Here is to slowing down quickly at the last possible moment

Derek

---

In the long run reality always wins.

derek Wrote:
-------------------------------------------------------
> IE someone at Mazda understood that to drive
> really fast one needs really good brakes even if
> there is not much power, low traction and simple
> spec.
>
> As I like to say when I drove in Gp2, sure they
> may have AWD but we all have 4 wheel brake and Gp2
> cars are lighter. A Subaru will accelerate faster
> but a Golf will slow down quicker.
>
> Here is to slowing down quickly at the last
> possible moment

Wink wink, nudge nudge.
A wink's as good as a nod to a blind horse, eh?
Know what I mean , eh KNOW WHAT I MEAN????
>
> Derek
>
>
>
> See me go at:
> www.11tenths.com
> In the long run Reality always wins.

---

John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

Gravity Fed Wrote:
-------------------------------------------------------
> im curious how they work the oil system. I'm going
> to guess it was a dry sump.
>
> -------------
> "The beatings will continue until moral improves"


Oil lines come out of the engine in the normal spot, so I'm calling no on the dry sump. The only reason to dry sump a rotary would be to lower it in the car (There aren't really many windage losses in a rotary), and since that would drag the transmission down with it, that doesn't seem practical on a car of this technological crudity.

-D



Edited 1 time(s). Last edit at 10/12/2009 12:32AM by eyesoreracing.

then there has to be some form of pump(s) inline to the coolant. I believe i see some type of recovery take in the hatch area as well.

---

First Rally: 2010 First RallyX: 2004 (a bunch)
Driver (0), Co-Driver (7)
Organizer (3), Volunteer (3)
Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5)
Last Updated, Apr 9, 2023

Actually, while the image angle is bad, the oil line coming out of the front cover is coming out at an odd angle. I wonder if it is the MFR drysump system.

No windage isn't TOO much of a problem but the stock oil pump setup sucks rocks. Or specifically it sucks air, it's hard to get oil all the way to the back (front) of the pump so it ends up cavitating a fair bit.

---

Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.

Actually, looking again, only one of the normal oil lines is there. There should be one off the rear housing that's missing. Instead there's that can next to the radiator with a high pressure line coming in and a hose coming out and dumping into the engine where the oil filler cap should be.

Not a dry sump, but hardly a stock system either.

-D

Scratch that. I squinted some more, and now I think I see an oil line running under the rear spark plugs. Three oil lines? Now I'm confused...

And while we're squinting, where the hell is the skidplate?

-Dave

hudson Wrote:
-------------------------------------------------------
> Dude is my hero.
>
> Love limestone and love group b shit
>
> FOR THE LOVE OF GOD, MAKE NEGATIVES of all those
> flares!
>
> Cheers
>
> Andrew McNally
> Hamilton, ON
> 29

A guy in Norway who used to be a mech. on one of the GrB cars got his hands on the body parts for his track car and was going to make molds - lengthy build thread:
http://www.rx7club.com/showthread.php?t=695029

Robin (in the throes of rebuilding his G2 RX7)

eyesoreracing Wrote:
-------------------------------------------------------
> Scratch that. I squinted some more, and now I
> think I see an oil line running under the rear
> spark plugs. Three oil lines? Now I'm confused...
>
> And while we're squinting, where the hell is the
> skidplate?

The big fat hose coming from the top of the engine is the breather hose.

It's going to a catchcan.

Blowby is a big problem with high performance rotaries. The idea is that a big fat hose will have a lower velocity of airflow than a smaller hose, so it will be less likely to pull oil through.

I have a 5/16" hose leading into a (cough ahem) modified 20oz Pepsi bottle ziptied to the master cylinder, and I have to empty it out fairly often. (I needed to solve a problem in the space of 5 minutes, and temporary fixes have a habit of becoming permanent.) This in combination with the oil filling with gasoline to the point where it gets to be a quart overfull after a month of driving and 1-2 rallycrosses, and is thus due for another change...

I hear that for the old GTU effort, they concocted a way of rapidly changing the oil during pit stops. When you're relying on the oil wedge to keep the rotors from hitting the side housings, oil pressure and viscosity become critical. I think finally paying attention to that is how I'm able to wing it up close to 5-digit territory on a regular basis, without ending up with a bucket of parts.

---

Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.



Edited 1 time(s). Last edit at 10/12/2009 06:55PM by Pete.

Somehow that widebody just doesn't do it for me when the car's low. It has to be sitting up on gravel tires...

Stole this pic from the thread, though:



-Dave