clubber

OK, I know that I can get some pics of a Bridgeport by looking long enough but I've looked at many threads and not gotten a good picture. I'm planning on doing a bridge soon so if you know where a good picture is, let me know.

diabolical1

iTrader: (3)

maybe it would be better if you gave an idea of what exactly it is you're looking for because I simply can't/don't believe that you couldn't find ANY photo of a Bridgeport - and one of the reasons I won't believe it is because I just Googled and Bing'd "Bridgeport rotary engine" and while other images were mixed in with them, I saw several photos and it literally took seconds.

TougeMonster

iTrader: (1)

I used the early 80s Mazda race prep hand book
It has the measurements laid out for ya.
Pretty easy to follow, just made my own template took an afternoon to make the template and port

peejay

You're welcome.

If you print that out, you can lay it over a stock port and coincide the two major curves in the main port. The bridge width itself is not to scale but the rest of the image should be.

I never used to use a template - I'd just scribe a line 5mm out from the outer edge of the port, then go from there to the edge of the rotor housing or 1mm from the water seal, depending on what I was working with. It's interesting that this port is basically the same as what I'd been making all this time.

clubber

Thanks, that was the picture I needed to see. I'm gonna be running a 56mm IDA type throttlebody with a megasquirt when it's all done.

TougeMonster

iTrader: (1)

What manifold are you going to use?
I plan on something similar with my bridge.
I might just use a racing beat uim with stock lim.
What itb setup are ya going to use. I still haven't found anything affordable.
Which is odd because they're so simple

clubber

I've got a weber IDA downdraft manifold and throttle body/ injectors. It's stupid expensive but I really wanted to try it out so the bank account is dry and I have a really pretty throttlebody.

peejay

IMO, if you're using an IDA manifold then you need to make sure that the ports close at the same time. Shouldn't be a problem with a 12A but some of the fuel injected center housings can't have the intake ports taken very high before hitting water.

EFI will make the thing fairly drivable and a fun little engine.

Pettersen

iTrader: (1)

Could you explain that statement in a bit more detail?

RRR Motorsports

Itbs will get u more power

RRR Motorsports

And he means the angles have to be the same or u wount be able to fit the carb properly my shop does p ports rotary reliability and racing aka RRR Motorsports we have one of the biggest and best Ports around u can look it up if u would like

Chriz88DX

iTrader: (1)

Iam also looking to do the fuel injected itb's on a ida intake. But the main component you are missing for a 2nd gen is the 5.12 ring and pinion. Now that is where you break the bank. But after all that is done my car will be a quick little s.o.b even with big 17's lol

Chriz88DX

iTrader: (1)

sorry about the caps lock being on

peejay

If you're putting it on the street then bridge ports will want taller gears, not shorter. They don't being loaded lightly.

I do have 4.78 gears because it's a rallycross benefit, but I also have a late FC trans and 26" tall rear tires to get the revs on the highway down so that the engine is loaded enough to run smoothly. 60mph is about 2800rpm but it's still not quite loaded down enough to run well and it lumps a little. Try driving that speed in 4th gear and you buck and brap down the highway, which sounds neat but is hell on fuel economy. And U-joints.

Hatchet Jack

I'm contemplating big twin snowmobile throttle bodies. Some are up to 50mm for less than $200 including a fuel rail and tps. Looks like foot controlled iac, though.

Good info!