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Gen II 13B Questions from New Guy

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Old 10-17-06, 12:46 PM
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Gen II 13B Questions from New Guy

I tried this on the general forum and got no response but since have figured out I have a 1986 13b normally aspirated so maybe this is the place to get some answers?

I have just bought a 1959 AH Bugeye with a 1986 13B and tranny. The PO junked the fuel injection and went with a Racing Beat Holley intake and carb. I would now like to go back to injection. The car has a custom fabricated RB header as well and free flowing 2" exhaust. Q's are:

What all will I need?

What should / shouldn't I get from a donor car?

I assume that in additon to intake, injectors, fuel rails, harness, ECU, etc. I will also need to go back to a hi pressure / hi flow fuel pump?

What CC flow injectors should I use?

Stock or aftermarket ECU?

Will I need sensors in the exhaust stream?

Can I go to turbo later if I decide I want to die (already ~175 hp in 1100 lbs.)?

Anyone have the parts / pieces for sale and anyone interested in the RB Holley setup?

Thanks for looking and hopefully responding.
Old 10-17-06, 01:28 PM
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It will depend on how the injector holes were plugged on the center plate. If it is something simple it should be no problem to go back to injection. Most everything you'll need is on the intake manifold assembly. The other parts are the two injectors that go in the center plate and their fuel rail/hold down thingy.
That gets you four injectors, TB, fuel rails and manifolds. Stock injectors are good for about 250HP.

As for computer, go with a Megasquirt, cheap and flexible for that later turbo set-up.

Drill a hole for a O2 sensor for the ECU, and a different throttle position sensor and use the stock temp sensors and you should be good.

For a fuel pump I'd use one for a Ford truck, simple to mount(external), fuel in one end out the other. Flows about 45GPH at 100 psi so 35-45psi is no problem. And they are cheap, less than $80 if I recall. Megasquirt can handle the rest of the relay wiring issues for the pump. As small as the Bugeye gas tank is I don't think I'd worry about a surge tank.

I built a '59 for a friend with an injected 1275, Midget discs, 5sp tranny. That car has got to be a blast with a rotary in it!
Old 10-18-06, 04:29 AM
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Bugeye 13B

jcrewe,

Thanks for the reply. Maybe ignorant lump guys aren't so welcome here?

I was looking at some of the FAQ's and can't see why I wouldn't go for an 88-89 intake setup as I'm starting from scratch anyway?

BTW, the tank is already a fuel cell but at only 12 gal. I think surge is okay. easy to get to the pump / regulator to swap out so that wil work. I'll keep you posted on progress!
Old 10-18-06, 07:22 AM
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Rotaries confuse me

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Originally Posted by Zachmac
I tried this on the general forum and got no response but since have figured out I have a 1986 13b normally aspirated so maybe this is the place to get some answers?
Sure is.

Originally Posted by Zachmac
I have just bought a 1959 AH Bugeye with a 1986 13B and tranny. The PO junked the fuel injection and went with a Racing Beat Holley intake and carb. I would now like to go back to injection. The car has a custom fabricated RB header as well and free flowing 2" exhaust. Q's are:
Glad you're putting in a rotary. Best choice.

Originally Posted by Zachmac
What should / shouldn't I get from a donor car?
Honestly, if you can just buy a whole car. You'll have something to look at and get any parts off you'll need, including ones not directly related to going back to EFI.

Originally Posted by Zachmac
I assume that in additon to intake, injectors, fuel rails, harness, ECU, etc. I will also need to go back to a hi pressure / hi flow fuel pump?
Get a stock pump.

Originally Posted by Zachmac
What CC flow injectors should I use?
460cc, stock. Bigger will just hurt your engine because it's N/A.

Originally Posted by Zachmac
Stock or aftermarket ECU?
The stock ECU will work just fine. If you want, you could throw a piggyback fuel controller on there, such as a S-AFC. You could put on an aftermarket ECU, but it requires alot of electrical know-how and is expensive.

Originally Posted by Zachmac
Will I need sensors in the exhaust stream?
There is an O2 sensor, but it's main purpose is going into closed loop while in 5th gear using light throttle (better gas mileage).

Originally Posted by Zachmac
Can I go to turbo later if I decide I want to die (already ~175 hp in 1100 lbs.)?
You can put a turbo on the N/A engine, but it requires a lot of custom work. It'd be easier just to put a 13BT in there.

Originally Posted by Zachmac
Anyone have the parts / pieces for sale and anyone interested in the RB Holley setup?
There's a For Sale section of the forum. Look/post there.
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