Thursday, June 30, 2016

Improved SBC Timing Chain Oiling

In the plug in the passenger side passage, drill out the plug 0.030" (1/32") to spray on the chain. You can also drill the other two plugs to release trapped air, but it's not necessary.

You can tap the plug holes with  a 1/4' pipe tap and use pipe plug, but use a shallow plug for the center hole so as to not to block the oil galley behind it.


Oil pump pickup should be held 3/8' to /1/2" off the bottom of the pan. When located correctly, weld the pickup in place.

REFERENCE

Block Plug Basics, Super Chevy

"Most small-blocks feature four 3/8-inch threaded holes (two per side) at the front of the block. The upper hole adjacent to the fuel pump passes into the crankcase area and if left open will allow oil to leak out from the block. Be certain to plug this hole only with a short 3/8-inch bolt (1/2-inch long). Because this hole aligns perfectly with the fuel pump’s pushrod, a longer bolt will contact and seize the pushrod during engine operation."

Grump's Performance Oil System Mods.

SBC Higher Capacity Oil Filters

If you have the room for the longer, spin on filters:

The "longer high capacity oil filter" Purolator is L40084.

"longer high capacity oil filter" N.A.P.A: # 1794

"longer high capacity oil filter" AC Delco: PF932

WIX 51459 ?

WIX 51794 ?

REFERENCE:

Grumpy's Performance Oil System Mods That Help

Sunday, June 19, 2016

Handy MIG welding reference.



Typically , the best cruising range for an engine is from 2,000 to 2,400 RPM. Here are some formulas to help you calculate the best gearing for your car.

mph = (rpm x tire diameter) ÷ (gear ratio x 336)

rpm = (mph x gear ratio) x 336 ÷ tire diameter

Gear ratio = (rpm x tire diameter) ÷ (mph x 336)

Tire diameter = (mph x gear ratio x 336 ÷ rpm)


Monday, May 30, 2016

Gotchas for SBC Timing

There is a gotcha for timing for small block Chevys that can cause problems if overlooked .

User "oldboogie" at the forum at Hotrodders.com said,

Unless you appreciate that the crankshaft and damper pass the timing tab twice in a revolution which puts different events happening at each place because the cycles (of the cam) are happening at half the rate of the crank. So for argument starting at a point where both the number 1 and number 6 pistons are at TDC lets say this in cam (thus distributor position) is ready to fire number 1. At this same time the cam has number 6 also at TDC of crankshaft but it is finishing the exhaust stroke and will commence the intake at the same time number 1 is on a power stroke. At this point if the timing cover was to be removed the timing mark of the crank gear and the mark of the cam gear would both be in the 12 o'clock position.

Now rotate the crank one full turn, both number 1 and 6 are back at TDC but number 1 is finishing exhaust and about to start the intake cycle, while number 6 has finished compression and is about to fire and start its power cycle. The timing mark on the damper is at TDC as the example above, however, with the timing cover removed the crank gear mark is again at 12 o'clock but the cam gear mark is facing it in the 6 o'clock position.

This quirk of the SBC catches a lot of engine builders including experienced ones. the reward is an engine that seems to want to run but doesn't quite get there.

The other is the distributor being off a tooth, this is forced by alignment of the oil pump drive which rotates with the distributor any time it is removed. This drops what seems to be the TDC point by 27 and some fraction degrees. The engine will start and run but has no power and backfires a lot yet appears to be timed correctly. This also bites a lot of people.



Sunday, November 2, 2014

HOW TO MAKE SPRINGS by Dave Silberstein


Until a few years ago, Dave Silberstein maintained a great site at EarthLink that delved into the mysteries of making springs. It was very extensive. If you needed to make a spring, his site helped you do it. He even went so far as to publish the site contents in book form at Lulu.com. Sadly, both the site and the book are no longer available because Mr. Silberstein passed away in 2012 in a car accident.

Such a valuable resource should not be lost. Fortunately, the WayBack Machine of the Internet Archive has kept an archived copy.

Here's the site map so you can get an idea of what's available and also so the search engines will pick it up.


HOW TO MAKE SPRINGS

Introduction Disclaimer, preface, description of the main types of springs
Design General principles, mathematics, design limitations, buying design
Materials Types of wire and their attributes, buying wire
Safety General safety, wire handling, opening and closing coils, coiling safety, wire storage
Equipment Winding machines, drills, hand winders, lathes, grinding equipment, finishing equipment, ovens, passivating equipment, hand tools, testing equipment, tooling stock
Tooling Pickup pins, wire guides, looping plates and rods, layover plates, bending pipes, bending jigs, passivating baskets, grinding stages
Setup First coils, drill setup, hand winder setup, lathe setup, left-handed springs, coiling without a lead screw
Torsion springs Wire length, first trial spring, torsion spring ends, extended hooks
Extension springs Wire length, first trial spring, loops, hooks, swivel hooks
Compression springs Wire length, first trial spring, grinding the ends, squareness, free length adjustments, setting solid, heat setting
Finishing Tweaking dimensions, stress relief, passivation, plating
Other types of springs Buckling columns, nested compression springs, conical compression springs, variable-pitch springs, snap-rings, double-torsion springs, wire forms, bedsprings, limited-travel extension springs, braided wire springs, heavy wire, light wire, square and flat wire, tubular stock, leaf springs, Belleville washers, clock springs
Spring shops Organization, product costing and pricing, careers
Glossary Definitions of spring-related words, detailed diagrams of the major types of springs and their parts
Resources Sources of information, associations, spring shops, suppliers, and other related links
Credits About this site; about me; and how to download this site.
New stuff This is an index page that provides access to new stuff added since January, 2003, and a chronicle of updates to the main body of the site.

Here's the link to the entire website for HOW TO MAKE SPRINGS.


There is a slightly older version of the site available for download as a ZIP file.

A PDF version is hosted here.

Here's a site that describes a homemade spring coiler. And two more sites for similar tools: One, Two.

A YouTube video of a spring winder.

DI-ACRO made a spring winder that shows up on eBay once in a while. Other manufacturers have made and make spring winding tools as well.

Sean Michael Ragan has an informative spring-making site.

Tempering a spring.

Also an excellent, down-to-earth HOWTO site for spring-making is Randy Hengl's. He has an interesting approach to tempering the springs: burning them in motor oil.

Monday, February 4, 2013

My 15 minutes of fame. My '36 Auburn was mentioned in the What Are You Working On section of GEARZ.