Question of the Day

[bravekozak]

I removed and studied the banjo bolt from one of my carbies.
The hole drilled through it is smaller in diameter than the fuel hose that is feeding it.
Does anyone know why?
Is it sized to reduce and maintain a calibrated pressure from the banjo to fill the fuel reservoir?
What would happen if I drilled the hole larger?

[Rick the Quick]

O.K. I had to get a new set of tires because the garage claimed the old set had dry rot. Same size tires are now rubbung when I hit bad ruts in the road. Stiffer springs needed? Slightly longer springs? longer struts? How do I know if I have Apire struts or Festiva struts? Should I assume the previous owner used Aspire struts? All wisdom would be greatly appreciated.

If you are still wondering, I have found that different brand tires in identical sizes can vary in actual dimensions. I recently installed a rear tire on a Triumph motorcycle and the Avon I installed was nearly a full inch narrower then the one on the front (Dunlop) yet they were both 4.10x19's. And no I'm not mistaking on the tire sizes. The bike is a 1975 Triumph Trident and it calls for 4.10x19 front and rear. I have run into the same situation on a car tire. I don't know exact dimensions on struts but I have found the rear Aspire struts have the spring perches located higher on the tube. This allows for more clearance between the tire and spring perch. They will also make your car sit up higher which may be good or bad. I cut a coil out when using the Aspire struts to get the car at the right height for me.

[Rick the Quick]

I removed and studied the banjo bolt from one of my carbies.
The hole drilled through it is smaller in diameter than the fuel hose that is feeding it.
Does anyone know why?
Is it sized to reduce and maintain a calibrated pressure from the banjo to fill the fuel reservoir?
What would happen if I drilled the hole larger?

The question is why would you want to drill it larger? Do you run 'er so hard that you experience fuel starvation? How is your fuel filter? Have you checked your pump for pressure and volume? I would imagine it could be drilled slightly larger as long as you don't compromise the integrity of the fitting. The needle and seat in the float circuit are probably your largest restriction to fuel flow and I would imagine unless you are running at high RPMs and/or pulling a trailer the stock carb should be adequate. My '88 with carby never gave me a bit of trouble (with the carb) I would actually say it was the best running carbureted car I have owned out of hundreds.

[bravekozak]

I looked on eBay for drilled and slotted Aspire rotors.
Compatibility is only for automatics.
How do I know if I have manual or auto rotors on my Festiva?
They were already on the car when I bought it.
Can Aspire manual calipers fit auto rotors?

[WmWatt]

Brave: I think use of the word "fuel" instead of "fluid" has confused readers as to whether it's the brakes or the gas. If you drill the holes larger there would presumably be less back pressure on the brake pedal. I'm thinking from HS science that when you put a restiction on fluid flow it increases pressure and speed of fluid at restiction. There's probably a sijmle formula for it which doesn't involve differential equations. A good example might be the adjustable nozzle on a garden hose. What that does to the action of the other brake cyclinders would be interesting.

[F3BZ]

Aspire MT discs are 18mm thick. AT are 22mm. caliper is the same. it is the outer bolt on clamp that makes it fit one or the other. AT clamp will have 22V stamp. MT is 18V.

[Sid_RallyX_82]

Wideband O2 Sensor

New question; Will a stock '91 ECU understand a Wideband O2 sensor? Or are you guys using stand-alone systems?

[zoe60]

New question; Will a stock '91 ECU understand a Wideband O2 sensor? Or are you guys using stand-alone systems?

My Innovate wideband has an extra wire in it's harness that is meant to be hooked up to the original wire. I hooked it up and the check engine light went out. The directions said it would work like the original. Of course mine really doesn't do anything since I replaced the carb. Hope that helps.

[FestYboy]

New question; Will a stock '91 ECU understand a Wideband O2 sensor? Or are you guys using stand-alone systems?

Stock won't understand. Stock voltage range is 0.1-1.1VDC where the wide band is 1.0-5.0VDC

[TominMO]

My Innovate wideband has an extra wire in it's harness that is meant to be hooked up to the original wire. I hooked it up and the check engine light went out. The directions said it would work like the original.

I had the same experience.

[Sid_RallyX_82]

Stock won't understand. Stock voltage range is 0.1-1.1VDC where the wide band is 1.0-5.0VDC

Cool, thank you

[bravekozak]

Does anyone happen to have a spare master cylinder lying around + a set of drill bits?
I need to know what the bore size is for the pushrod hole, as well as how far does the drill bit go into the hole?
I just finished painting my cast iron Escort master bright red and am in the process of bending a 1/8" stainless wire to hold the cover down. The bolt holes are identical I just need to confirm the pushrod travel distance. Thanks.

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