I only found one scatter shield for sale at mazdadragracing.com but it was for $335, i thought they generally go for about 200? If anyone knows where i can get one, let me know, thanks

 

So you are planning on sustained 8500+rpm? You could always use a balistic blanket from Summit for $80 i think.

 

Scattershields usually cost in the $300-500 and up range. I dunno if a ballistic blanket will be good enough... do a SEARCH for scattershield there has been a discussion on this before...

I'd run a scattershield no matter what... the only reason I didn't run one last year was because I'm a dumbass! A clutch or flywheel coming apart at ANY rpm will really wreck your day, as well as the day of anybody who happens to be in the "line of fire"!

 

What I have noticed is this, missing a shift at 5k usually just grinds the gear. Where as a missed shift at 8500rpm+ sometimes ends up in shattering the clutch disc as what has happened to me. So why don't stock engines have scattershields since you say you would run a scattershield no matter what. but obviously you must be pushing serious HP to justify one.

 

It's not the HP - it's the RPM!

Stock engines don't have scattershields because the factory sets a nice, conservatively low redline and doesn't factor in abuse like 8000rpm clutch dumps. Notice the factory also doesn't install driveshaft loops... a front U-joint failure (which can happen in as little as 80,000mi) will really ruin your day, as what usually happens is the driveshaft digs in and the car polevaults. Stock cars also do not come with 5-point harnesses, or fire extinguisher systems, or 12 point roll cages, or external master electrical switches... see my point?

 

So you dont think the ballistic blanket would be enough? I was looking for that in the summit, but could not find it... I guess i could just call and ask, but if it wont hold... then i dont want to waste the money on it. I see dsm ones for 200 bucks all day. Even honda ones i think... But that is the only one i have found so far for the rx7...

 

Most scattershields actually replace the bellhousing... I wonder why nobody's apparently gone to the trouble of making one for rotaries?

 

Lakewood is presently in the process of manufacturing a bolt in legal SFI bell housing for the Mazda rotary engine.

crispeed
87TII
9.20@150mph

 

Has anyone actually seen one explode inside a ballistic jacket? Just wondering if they really doa good job or not?

 

Crispeed that is WONDERFUL news!!! Do you know any more about it? (IE is it for the T2 trans only, or will there be "alternate" bolt patterns so a race trans can bolt up)

 

Peejay. I was wondering why Racing Beat recomends balastic blankets or scatter shields and balancing with engines that will consistently see 8500rpm+ or above. I'm sure things that are bad(life threatening) can happen below 8500rpm, but are somewhat less likely then one would think. I haven't seen any rotary break below 8500rpm that resulted in a flywheel/clutch failure. Many cars have rear wheel drive but I haven't heard of a drive shafts' u-joint going out at 80,000miles, not to say it can't happen!...But mine has 159,000+miles. Of course put more safety in if I were to add a lot more HP, but I'm not pushing 300+hp.... yet. But I'm sure you are easily way past that though, right? Don't be mad, just resiting what I've seen.

 

Hey, That is good news! Ive also been looking for a scatter shield for my Fb but have not had a good reply from mdragracing.com. Lakewood?? I saw the ballistic blanket and thought about how much heat it would hold in,so pass on the Summit Racing. So any more details on Lakewood? Thanks.

 

Where am I at? Right now I'm at 100hp, because my "race" engine blew... before that I was at a lofty 140 or so HP, launching at 5500-6000, shifting at 8k.

It's not HP that makes it bad, it's RPM! The forces trying to rip the rotating assembly apart go up as the SQUARE of RPM. So a mere 1500rpm difference, from 7000 to 8500, is a MASSIVE change in the rotational inertia. (It's also why it's better to make HP lower down in the RPM range, but that's a different topic)

Lakewood is a well-rooted manufacturer of shattershields and other equipment for domestics. They're a rather big name in the industry.

 

So you have had a flywheel break on you? I've seen a couple 1st gen flywheel failure videos. They both didn't have shields and the drivers walked away. One was somewhat mad though. The plane of destruction was infront of the firewall taking out the front fenders near the rear of the wheels and the hood flung open. Both were doing things they shouldn't have..holding it past 8500rpm doing burnouts.

 

oh, so thats what happened on that one video. Never really knew what happened.

 

I have never had a flywheel break on me. In fact I've been rather lucky, I've never broken anything while racing. But I know that I won't be that lucky forever... and I'd like to keep me feet attached to my legs, where they belong.

I post this link sometimes, but it's kind of appropriate...

http://www.allpar.com/mopar/shield.html

Not what I want happening to me.

 

Can anyone put me onto where you can find a 'jacket' to go on a Turbo II tranny/bell housing. I have very little room as the engine has been moved back and is real clsoe to the firewall. Any thoughts?

 

Looks like I'm going to bring this one back from the dead... anyone find a place that is making a scatter shield for the 3rd gens? What are all these guys running in the 10's using, some custom made shields?

 

Guru racing has a scatter shield, i dont remember the price though.

 

Here is one I bought from Summit that I was thinking about modifying to fit around the bell housing.

 

That shield was never intended to be use on a manual transmission equipped vechicle. It's designed for auto transmissions that use a light weight flex-plate instead of a heavy flywheel.
The only shield that's legal in most forms of dragracing would be a SFI. approved one. The general rule is quicker than 9.99 secs require an SFI spec bellhousing or slower a custom fabricated one made out of 1/4 inch steel.

crispeed

 

I checked out the Guru shield. It looks like one of the tranny blankets. They say it meets SFI 4.1. Does anyone know what kind of times that is good for? Is that for the trans gearbox or bell housing? Does NHRA and IDRC use the same standards? Is a tranny blanket strong enough to contain a exploding flywheel or clutch? Sorry for all the questions. I have searched and all the info I have found is not very clear.

 

here it for $335.

http://mazdadragracing.com/fabricationpage.html

 

The guru one is a textile bag that goes around the bellhousing. They are actually made by a different company from South Australia and a number of other Aussie places sell them, revpower, mazfix.

They aren't the traditional ballistic blanket that covers the trans, they just do the bellhousing. I'm pretty sure they have modesl to suit rx4 bellhousing and the tII as well.

One thing to be aware of is that a steel or carbon bellhousing is the best option just in case of a major destruction - this way the box and engine still stay supported and in place (but a front mountedengine that suddenly loses the suport of the gearbox could start moving around the place... say in a 1st gen, back onto the steering....


the guy who makes them was getting farked around by the Aussie drag sanctioning body, so he sent them to the US for SFI certification.

 

The blankets are no longer legal here in the us due to the 4.1 SFI rating. The fabricated shield above is what is needed now for 11.99 and quicker and for the really quick cars (9.99) depending on sanctioning body a full bellhousing with 6.1spec and above is the ticket.

crispeed