Real Fiero Tech

Shaft OD was pretty bang-on, around 0.7495". Installation bores measured between 1.375" to 1.377". The wall of these parts is thinner, so less solid than the shafts, so I am not surprised that there is more variation here (some out-of-roundness). If you took measurements of these dime...

So I've been shopping around for seals, and I came across these (they look like they fit the bill): American High Performance Seals HRO High misalignment, single-lip oil seal https://ahpseals.com/product/hro/ I might want to request a quote, but I would like the design dimensions if possible, as the...

I ran this cam with two separate engines, one was assembled by a machine shop, one was assembled by your's truly. the one assembled by the machine shop ran these pistons and rods, in fact, even the same block, and didn't have PTV interference, the other engine, that I assembled, had PTV interferenc...

I had some brackets that I purchased ready-made years ago, but they needed to be redone for a number of reasons. Minor design issues I didn't like, threads I managed to fubar, and some out-of-flatness... Anyway, I found this reference: https://www.fiero.com/forum/Archives/Archive-000002/HTML/2005041...

Yes, that is quite attractive, and a contrast from modern-day bloat.

Was this in a junkyard?

I assumed the points between each duration step were linear, which may not be true You might try interpolating between the known points using a spline curve. Camshaft lobes are (or should be) designed to smoothly open and close the valve, with a fluid motion. This helps to reduce abrupt motions tha...

The table and its first project.

Painting the upper control arms of my Fiero with with brush-applied POR-15. I like POR-15 for parts like this.
Besides a bolt tack-welded to secure the brake hose, the upper control arms are stock.

I would like some of these.

Anyone have some that they would like to share with me?

How does desktop dyno work? Do you think it gives good results? ******************************************************************************** One-nut idea: The only problem I see with sandwiching the windage tray between the nut and the main cap is if the tray is of a soft metal that will creep, ...

The CNC work was actually done a few months ago. Since then, I noticed that my 6" grid pattern of 3/8" holes was no longer exactly on a 6" pitch. The wood shrank: Shrinkage.JPG Much more movement perpendicular to the grain than parallel with the grain. On some of the brackets fixing t...

The exhaust has no AVCS (VVT) so they are the same sprockets as my motor and I have the tool for them. These bolts (especially on the exhaust cam due to heat cycling) are notorious for having to be drilled out and for rounding. But they really require a JIS 10mm impact hex socket, the fit is perfec...

It's been quite some time since I've posted here and I've gone through a lot of cars in that time. I have also got heavily involved in SCCA autocross. I think I started in 2017. I am now co-chair and course-designer of my local region and I do about 20 events a year including a few national events ...

Bad timing for tennis elbow %) ******************************************************************************** This weekend I built the legs. Legs.JPG The legs are off the tabletop now; when the separate parts have been varnished, I will reassemble the table. ***************************************...

This is something I've been working on... I want a solid table on which I can smash things with a hammer, without too much bounce. A general purpose table for assembly, etc. I'll be putting a vise on it, but no other tools. This is all done with leftover wood from the demolition of the former partit...

Very interested in seeing how your setup comes out with drilling new mounting holes for the stock control arms with these spherical bearings. I don't really know what I'll be able to conclude about that. I'm doing a bunch of things at once (wheels, tires, bigger brakes, rear coilovers, stiffer fron...

The control arms are made of stamped metal, and I didn't want to bend them pressing out the stock bushings. This is the method I used to remove my stock bushings without much trouble. First, I heated the outside of the stock bushing shells to heat the rubber and make it pop out, just as with a norma...

Using a tube or other cylindrical shape sandwiched beneath a bolt head appears to be a strong way to make a connection to a pickup point, versus a flat plate with gussets.

Not my photo: Now that you have a lathe, the possibilities for this are wide open!

How would you find the lower limit practically? Trigger the sensor and measure resistance between signal and sensor ground? What magnitude difference in resistance would you want between the on resistance of the output and the pullup? How would you go about determining the current carrying capacity...

15% increase in hp/torque sounds like a lot... Except at WOT, almost all fuel is burned nowadays in an engine... so that 15% gain cannot come from burning the near-zero amount of fuel that is normally unburned. Maybe somehow the dimples increase the flame speed? If that's the case, then maybe the in...

Pullup resistor value is more defined by noise immunity requirements than rise time. Can you elaborate on this? Consider the limit as the pullup resistance tends to infinity. In this condition (with output driver switch open), the potential of the line is ill-defined, and any noise can easily chang...