Search found 1282 matches

by 66vairguy
Fri Jul 28, 2017 9:28 am
Forum: Ask your Mechanical Questions here
Topic: Tyre Pressure
Replies: 3
Views: 290

Re: Tyre Pressure

An understeering car is more predictable and tends to correct automatically by just lifting off the accelerator. Most of the Corvair books note that GM deleted the front sway bar on the original Corvair and relied on lowered front tire pressure to reduce front tire adhesion when the car was at it's ...
by 66vairguy
Thu Jul 27, 2017 4:49 pm
Forum: Ask your Mechanical Questions here
Topic: Coil arcing
Replies: 5
Views: 185

Re: Coil arcing

NOTE: All electronic ignitions systems warn to NEVER operate the coil without a load, like pulling off the spark plug wire to test one cylinder.

Even with points it's hard on the coil insulation to operate it without a load.
by 66vairguy
Thu Jul 27, 2017 1:21 pm
Forum: Ask your Mechanical Questions here
Topic: Idle at 1000 plus
Replies: 13
Views: 715

Re: Idle at 1000 plus

Based on trial and error by others, the lowest recommended RPM with the Petronix II is about 900 for a smooth idle. This is why I use the Petronix I, ballast resistor, stock coil for non turbo applications. More than adequate. Yes the secondaries can stick open. Clark's sells an optional return spri...
by 66vairguy
Thu Jul 27, 2017 1:08 pm
Forum: Ask your Mechanical Questions here
Topic: Orifice Size
Replies: 7
Views: 233

Re: Orifice Size

Thanks guys for all great information. These are the first cars I have owned that had a PCV system. I am guessing from the information I am seeing here, it is an either/or situation. If you have an Orifice Tube, you don't have a PCV Valve, and vice versa, but you don't have both. Is that correct? C...
by 66vairguy
Thu Jul 27, 2017 8:57 am
Forum: Ask your Mechanical Questions here
Topic: Orifice Size
Replies: 7
Views: 233

Re: Orifice Size

Some folks drill out the orifice and install a carburetor jet. Sometimes to fix a damaged orifice, sometimes just to allow for easy cleaning. Cleaning the orifice hole is part of the normal maintenance schedule. When engines wear out and blow-by increases the PCV tubes can become plugged with gunk.
by 66vairguy
Wed Jul 26, 2017 5:43 pm
Forum: Ask your Mechanical Questions here
Topic: Secondary carb internal components image
Replies: 12
Views: 392

Re: Secondary carb internal components image

As Brad said - Basically a secondary is a primary carb without some features. Per respected Steve Goodman I've installed 62-63 primary bases under the secondary tops and used the solid secondary throttle plate (no transition slot). These simple primaries make good replacements bases for secondaries ...
by 66vairguy
Tue Jul 25, 2017 8:37 am
Forum: Ask your Mechanical Questions here
Topic: Secondary carb internal components image
Replies: 12
Views: 392

Re: Secondary carb internal components image

You'd think the secondaries are simple, but GM revised them several times to correct issues. Most issue can be avoided by doing three things - If you open the secondaries KEEP them open at least a second to prevent fuel accumulation on the throttle plate that will make it sticky. Don't open the seco...
by 66vairguy
Mon Jul 24, 2017 11:53 am
Forum: Corvair Talk
Topic: Seat upholstery pattern
Replies: 20
Views: 655

Re: Seat upholstery pattern

WOW - who called you a liar?? Nobody here. The responses were conditioned on your experience - nobody suggested you could not do it.

Sorry if I offended. I won't make the mistake of wasting my time responding to you again.
by 66vairguy
Mon Jul 24, 2017 11:47 am
Forum: Corvair Talk
Topic: Fuel
Replies: 23
Views: 1100

Re: Fuel

If the engine is "locked" pull the spark plugs and attempt to turn over BY HAND. If a carburetor has flooded a cylinder the fuel will be pushed out the spark plug hole - IGNITION OFF AND HAVE A FIRE EXTINGUISHER READY. BTW. It has been reported a few times that engines started up on old gasoline can...
by 66vairguy
Mon Jul 24, 2017 8:19 am
Forum: Ask your Mechanical Questions here
Topic: High compression 205 psi average on all cylinders
Replies: 67
Views: 1711

Re: High compression 205 psi average on all cylinders

Tom - I doubt any Corvair cam would make that much difference in compression pressure, but I've seen issues with a cam that was way off or were a valve did not work and affected just one cylinder (exhaust valve didn't open). I always degree a cam, but of course you need to know which cam is in the e...
by 66vairguy
Sun Jul 23, 2017 9:15 pm
Forum: Ask your Mechanical Questions here
Topic: High compression 205 psi average on all cylinders
Replies: 67
Views: 1711

Re: High compression 205 psi average on all cylinders

Tom - as long as the engine is out I'd check the cam timing. Crank gear and cam gear keys do shear.
by 66vairguy
Sun Jul 23, 2017 5:58 pm
Forum: Ask your Mechanical Questions here
Topic: High compression 205 psi average on all cylinders
Replies: 67
Views: 1711

Re: High compression 205 psi average on all cylinders

Tom -- O.K. I dug out some parts ----- I agree the cylinders measure fine. NEXT - Lets look at the pistons since you have them out. Measure from the top of the wrist pin hole to the top of the piston. I checked some TRW forged pistons, been used by folks for years. The distance I measured was about ...
by 66vairguy
Sun Jul 23, 2017 11:44 am
Forum: Ask your Mechanical Questions here
Topic: High compression 205 psi average on all cylinders
Replies: 67
Views: 1711

Re: High compression 205 psi average on all cylinders

Good points, I assumed all the parts were original, or proper aftermarket.

Tom - Are there any numbers or identification on the pistons to suggest who made them?
by 66vairguy
Sun Jul 23, 2017 8:39 am
Forum: Corvair Talk
Topic: Seat upholstery pattern
Replies: 20
Views: 655

Re: Seat upholstery pattern

My wife is a tremendous seamstress. We know upholstery is a little different but we want to try our hand at it. She has a great resume for her sewing. She been a costume designer for six flags, she's down some really expensive wedding dresses, custom corsets, etc. She also did my motorcycle seat, t...
by 66vairguy
Sun Jul 23, 2017 8:29 am
Forum: Ask your Mechanical Questions here
Topic: High compression 205 psi average on all cylinders
Replies: 67
Views: 1711

Re: High compression 205 psi average on all cylinders

A conservative cam will raise compression at lower RPM vs. a more aggressive cam, but not to the extent Tom originally reported. I was also thinking that Tom said he purchased the correct 64 heads from Clark's. Now I'm wondering if he checked compression with those? The original heads on the engine ...
by 66vairguy
Sat Jul 22, 2017 6:35 pm
Forum: Corvair Talk
Topic: Seat upholstery pattern
Replies: 20
Views: 655

Re: Seat upholstery pattern

Unless you are good at upholstery, or don't want the stock pattern, I'd just go with the Clark's upholstery. Very good.

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