I am building a peripheral port 12a for my fb and since the engine will be turning such high rpm's I think I should be safe and install a scatter shield or blanket of some sort. Does anyone have experience with this? Where can I buy one that isn't made for a domestic? Should I go with a blanket or a metal shield? Would it be fairly easy to fab my own? Any and all help is appreciated!

 

Rohan Ambrose will be at Sevenstock with some of the SFI 4.1 approved wrap_around scatter "jackets" that Guru Racing sell from Australia. Go have a look at them, easy, light and do a good job.

 

Cool.......thanks for the info!

 

twister, are there scatter shields for 13Bs as well? I need one....I like my legs attached to me....

 

Hi,
Yep they sure are.
I run on on my 13B, matched up to a Gen 2 Turbo case with a close ratio/straight cut racing gearset installed.

 

Hey,

Is Sevenstock going to be huge or is it just okay?

 

How much will one of those scatter shields set me back?

I'm highly contemplating flying out to CA for Sevenstock so I'd like to know if it's worth it as well.

 

twister

Sevenstock is possibly the largest car enthusiast event that I've ever been to. The event is nicely organized by Bern (on this forum), RotaryNews.com, SoCal7s.org, Mazda, and w/ the help of the Irvine police.

Mazda got involved a couple of years ago, and they have graciously opened their doors to the R&D department, giving their visitors a view in to how all of their cars (not just rotaries) are designed. Mazda even made arrangements to ship cars to the event, just to show them off (the Reknown 787B is one car that they brought over from Japan). Vendors even made a point of showing up. (Pettit in Florida, SR Motorsports in Northern California, Rob w/ Pineapple Racing, Racing Beat, etc.).

This event has become a large event over the years. It was once a one day event. Now, it seems to have become a 2 day event.

This event is definitely worth it. It is not often, that an auto manufacturer helps get involved w/ directing supporting an event. Name sponsorship is one thing. Directly supporting it, is another.

I don't think you will be disappointed.

Regarding the scatter shields, I just found a picture of it.

http://www.gurumotorsports.com/products/scatter.htm

Does anyone know of a vendor who makes a steel scatter shield???

 

Yea i was thinking about getting a blanket from summit and modifying it to work on my car, Im like DOM i do like my legs and being able to press the gas, I also would be interested in a scattersheild, and if anyone has the rules, on how thick and stuff and the guidelines, i know a couple people that would be interested in helping me make one.

-Chris

pm me with info if you want please.

 

Contact SFI, they are the one's who have to actually do the certifcation for a "blanket". Note it costs a fair few bucks to get a certification approved. That is part of the cost of these SFI approved blankets etc.

I had a pressure plate let go several years ago (destroyed the car and nearly several spectators), and since then have been looking for decent blanks/shields that actually contain the blast.... So far these blankets (via Rohan) seem the best (and easiest etc)

 

I have a question. The shild wraps around the housing. Enclosing the engine in a cylinder so to say. Well, the driver sits facing the rear opening of that cylinder, so if the engine does blow and the parts wont fly left and right, they will fly forward and backward right. And backward is where the drive sits. So how does this make it safe for the driver. Unlese ofcoarse there are wrapings that bolt on verticaly around the engine (if you are looking from the front of the car).

[ ] engine block
{} safty wrap


--->DRIVER<---


---^ ^ ^
----^ ^ ^
--^ ^^
{[ <--- ]}
{[ ]}
{[ ---> ]}
{[ ]}
{[ <--- ]}

 

I think the main focus of these blankets is to keep the flywheel from injuring you. The flywheel is rotating at a high rate of speed so if it shatters or comes unbolted I would expect it to travel outwards on the same plane it is spinning upon. I would think a properly designed wrap would do a good job of containing the shrapnel. I don't have any personal experience and may be wrong so others please speak up.

 

well if it will travel in the plan it is rotating in (which makes perfect sence) the why they need for the wrap??? it will go to either side, and thats not where the driver is.

 

I guess when it contacts the bellhousing all hell breaks loose. As the pieces travel outward they hit the blanket which prevents further expansion in undesired directions. I understand that you are thinking the pieces would travel in the direction of least resistance but after contacting the wrap initially (as I'm sure most pieces do) lots of the force is absorbed and the residual energy is dissipated fairly harmlessly and with insufficient force to penetrate and cause harm.............I guess

 

hm, I see your point. One thing though, the warp wraps around and bolts on to the housing, I dont see how that cover the flywheel, it is all the way at the end and off the housing

 

last year there were 400+ cars, almost every vendor/tuner and a big bbq

mike

 

I would like to see a good shot of the blanket installed as well because I have wondered the same thing.
Yeah, my point was that if the shield was not on the tranny the shrapnel would probably riccochet (sp?) off miscellaneous components in a variety of trajectories and possibly injure the driver.

 

great idea. So, does anyone here has one installed so we could see how it looks?

 

They are attached to the back of the engine by the bolts that hold on the bellhousing, wrap all around the bellhousing down to where it joins the gearbox. Like Twister said, it retains the flywheel, pressure plates, clutch cover and clutch disk in the case that any of the above lets go. Sorry, I dont have a pic of one installed.
I was after one myself when funds allow. THey fit all worthwhile combinations of 12a/13b and Mazda manual bellhousing (1st & 2nd gen rx7, rx4, rx5/cosmo gbox, plus I believe supra, corona etc boxes ).

Part of the attraction of these down under is that the drag racing rules require a steel bellhousing (two chances of finding one, f*ck all and even less) or a steel scattershield attached to the chassis... pain in the butt to do. Or an SFI approved device. Like this.

there is a great Aussie mpeg of a flywheel letting go in a Mazda 1300 wagon at the drags at Oran Park near Sydney. the chassis was destroyed and the crowd were most lucky. Do a search on www.Ausrotary.com . The explsion was lucky not to main the driver, but a large shard of metal went through the inside guard and front guard, another blew the bonnet open. On the video you see the clutch disc go running back across the track.... very messy. Oh, and its not the HP that is the problem, but the RPM.

 

This looks similar to what Guru is selling and has the same SFI 4.1 rating. Plus Summit has it in stock for only $79.95.

RCI trans blanket

Universal, 47 in. long x 11 1/2 in. wide, nylon, red, multi-layer, transmission safety blanket

RCI's transmission blanket is water and oil-resistant and is made of high-tensile webbing and steel. It is 47 in. x 11 1/2 in., has an S.F.I. rating of 4.1, and fits most transmissions.

 

Thanks for the link.

I recently spoke with a friend who informed me they used old conveyor belts and metal stripping "in the old days"

 

What is the RCI blanket rated up to for as in quarter mile times and E.T.'s? Is it NHRA approved? I'm looking at that or a scatter sheild! thanks
Marc

 

Well i found a scatter sheild at GURU racing, but they wanted more than 500 shipped for it! The driveshaft loop looks likes its going to have to be custom made. Figured i would post some usefull info! thanks
Marc

 

That is AUD i.e. Australian Dollar.

In USD that is about $375....

 

Ya thats is true its not that bad of a price. BUt about 6 month ago the conversion rate was almost 2 AUD dollars to 1 US dollar, damn falling ecomony!