http://cgi.ebay.com/ebaymotors/89-90...QQcmdZViewItem

yeah ok, gaskets adding power!!! right!!!

 

Well they can add a tiny tiny tiny, amount of horsepower. but not noticable at all. Just because less heat transfer from the block to the manifolds. I'm not even sure what they have hear would do that any better than the stock ones. They may. Again though, even if they do, it will be a miniscule amount of power gained.

 

They do help, a bit, but on the 13B I'd worry more about the exhaust manifold or header heating up the intake manifolds. A heat shield between the intake and exhaust would be a good addition to this. With these you also have heat transfer through the bolts. You can drill out the holes and install the bolts with some tight fitting rubber hose around them and a plastic washer under them to fully isolate the manifold. Also I don't know if these would stand up to the legendary heat generated by the 13B. I know they are fine in piston engines, but ours have much higher exhaust temps.

 

$35

 

5% increase? Stack them for better performance? Yeah i don't think so...

 

uhhh no....
im suggest you use plastic bolts too so they transfer less heat than metal ones??????????????????????????????????????

 

You'd actually be suprised, a company called OutLaw engineering makes these for the KL-ZE engine (Mazda's JSpec 2.5L V6) and I must say they do help insulate the intake manifold VERY well. The heat transfer is lessened quite a bit.

The effects of underhood heat soak are still a problem, but the intense heat transferred from the block is repelled rather effectively.

 

I highly doubt it has any effect since most of the heat transfer to the upper intake is through radiant heat from the top of the engine...

 

I still don’t' buy it. The intake sits on top of the engine and is bolted to the engine in a number of spots. This gasket would imply that it's as good as an intercooler. The slight difference in intake manifold temperature would not yield real results.

If you happen to have dyno graphs then i'll recant my statement, otherwise I think this is a worthless scheme.

 

i still dont believe it!! there is no way a gasket can increase power. maybe town the heat down a little but to increase power........
i wanna see proof also.

 

I think the idea comes from the phoenelic resin riser plates that you can get for v-8.. for the plenum?lim on injected cars and below the carb on a holley type setup this actually WORKS... I've seen the results at the track with nothing changed but adding the riser.... but those are asos 3/8" thick or greater.

All things considered.. I'd bet they do have a very slight benifit.

 

Yeah, the ones we use one the KL-ZE motors are 3/8"

 

yeah, that's 5% per plate too. So if you were to stack 20, you have just doubled your engines power for only $700.

 

it adds power only if it comes with a sticker.

 

and big heavy underpowered subs.

 

okay as dumb as this sounds they do actually work and are dyno proven. there is a company that started making them for hondas and whatnot, i want to say hasport sells them. anyway they have been tested by reputable sources (i cant remember what magazine i will have to look in my stash) but it did make a slight amount of power. it like for every 10 degrees of intake temp you gain 1% power. it is minor but it works. now on rotary there are plenty of places where the intake manifold can get heat baked. i would think possibly if you heat wrapped the manifolds and put a heat sheild between the exhaust and intake maybe you could get a small gain.