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Search found 1173 matches

by engineguyBill
Sun Jul 05, 2020 5:01 pm
Forum: Engine Tech
Topic: Installing damper with hammer
Replies: 41
Views: 1231

Re: Installing damper with hammer

I think that GM had a fixture that was used to install the dampeners on early SBC engines that did not have the crankshaft drilled for the dampener bolt. This fixture was pretty large and cumbersome, had fingers that went behind the back side of the crankshaft, a frame that went to the front of the ...
by engineguyBill
Sat Jul 04, 2020 1:04 pm
Forum: Engine Tech
Topic: Valve job with stones
Replies: 29
Views: 964

Re: Valve job with stones

Grinding stones work very well for valve seat grinding. It is important that the pilots are correct size and in good condition, stones are properly faced using diamond fixture and that the seas are checked for concentricity. The seats and the valve faces should be smooth for best results.
by engineguyBill
Mon Jun 29, 2020 9:20 pm
Forum: Engine Tech
Topic: helmets
Replies: 1
Views: 159

Re: helmets

Depends on the dragstrip and the class that the car was entered into. There was no consistency in the helmet rules in the early days of dragracing and many of the old time helmets looked like antique football helmets. Many dragstrips had rules such as: helmet not mandated as long as the car was a st...
by engineguyBill
Tue Jun 23, 2020 11:51 pm
Forum: Engine Tech
Topic: .120 vs.080 wall 3/8 pushrods sbc
Replies: 24
Views: 1102

Re: .120 vs.080 wall 3/8 pushrods sbc

If you're not concerned about pushrod weight, use the .120 wall pushrods. Pushrod weight should be a non-issue in this situation. Weight on the "lifter side" of the rocker arm is not as critical as the weight on the "valve-side" of the rocker arm. This is the reason as to why we utilize weight savi...
by engineguyBill
Thu Jun 18, 2020 3:55 pm
Forum: Engine Tech
Topic: Rings for mild blown application
Replies: 7
Views: 225

Re: Rings for mild blown application

1.5mm; 1.5mm; 3.0mm is a good ring package for this application. TOP GROOVE: steel ring with plasma moly face; SECOND GROOVE: grey cast iron Napier style; OIL ASSEMBLY: Standard tension flex-vent style. I have had good luck with the Perfect Circle/MAHLE ring sets with these features. I wouldn't worr...
by engineguyBill
Wed Jun 17, 2020 2:03 pm
Forum: Engine Tech
Topic: Aussie burnout engine bearing clearances?
Replies: 16
Views: 710

Re: Aussie burnout engine bearing clearances?

I have no idea what these blokes run for bearing clearance, but cannot see any reason why they would not be running the generally-accepted bearing clearances of .0025" to .0003" OR possibly .0035" to .0004".
by engineguyBill
Tue Jun 02, 2020 11:31 pm
Forum: Engine Tech
Topic: Trouble getting the correct rings - What is going on?
Replies: 25
Views: 1281

Re: Trouble getting the correct rings - What is going on?

Total Seal should be able to supply the correct rings for this application, be sure to verify the actual bore diameter as BillK has pointed out. Wiseco should be able to supply a set of NPR rings for this application as well.
by engineguyBill
Tue May 26, 2020 2:53 pm
Forum: Engine Tech
Topic: Just made a sump. How do I seal the weld leaks?
Replies: 28
Views: 2768

Re: Just made a sump. How do I seal the weld leaks?

I have used JB Weld, very successfully for this type of repair. Make sure that the surfaces are clean and dry prior to repair. The stuff will last indefinitely and will not crack like bondo is likely to do . . . . . . .
by engineguyBill
Mon May 18, 2020 1:06 pm
Forum: Engine Tech
Topic: Valve seals with dry sump setup?
Replies: 12
Views: 614

Re: Valve seals with dry sump setup?

I run seals on both intake and exhaust guides on all engines, from street performance to maximum-effort race applications. I use positive type seals on all applications, my personal favorite is the Teflon PC seal, when there is sufficient valve spring clearance. One thing that is very important is t...
by engineguyBill
Mon May 18, 2020 12:51 pm
Forum: Engine Tech
Topic: OE Std. Volume Oil Pump GPM
Replies: 13
Views: 888

Re: OE Std. Volume Oil Pump GPM

In order to calculate the "net" volume of an oil pump, there are many related factors that must be included in the analysis. A few of these factors are pump type (gear or gerotor); pickup size and shape (i.e. radius of bends in the pickup tube, shape and dimensions of pickup screen); type of relief ...
by engineguyBill
Mon May 18, 2020 12:47 am
Forum: Engine Tech
Topic: OE Std. Volume Oil Pump GPM
Replies: 13
Views: 888

Re: OE Std. Volume Oil Pump GPM

Contact Verne Schumann @ Schumann Oil Pumps. 804.779.0888 or schumannoilpumps.com. He has done exhaustive testing of OEM oil pumps and offers many variations of oil pumps; i.e. high volume, OE standard volume, lower than standard OE volume, high pressure, low pressure, etc., etc.
by engineguyBill
Sun May 10, 2020 11:16 pm
Forum: Engine Tech
Topic: Determining balancer size?
Replies: 13
Views: 744

Re: Determining balancer size?

For street high performance and bracket racing, large diameter dampener is optimum. For high RPM maximum effort race engine with lightweight rotating components and high stall torque converter or stick shift, then the small diameter dampener is the best choice. My opinion . . . . . .
by engineguyBill
Sun May 10, 2020 11:09 pm
Forum: Engine Tech
Topic: SBC Crankshaft main journel sizes
Replies: 13
Views: 640

Re: SBC Crankshaft main journel sizes

When an engine is originally designed by OEM manufacturer's engineering staff, they draw prints of the crankshaft as well as the cylinder block. They send these prints to the bearing manufacturers, along with related nomenclature such as vertical oil clearance, thrust surface design, etc., etc. The ...
by engineguyBill
Mon Apr 27, 2020 12:14 am
Forum: Engine Tech
Topic: Checking a long block without disassembly?
Replies: 6
Views: 420

Re: Checking a long block without disassembly?

The only way to make a viable assessment of engine condition is to disassemble it for visual inspection. This is probably not what you wanted to hear.
by engineguyBill
Mon Apr 27, 2020 12:05 am
Forum: Engine Tech
Topic: changing tranny fluid
Replies: 8
Views: 545

Re: changing tranny fluid

High-stall torque converter generates a ton of heat, even though you are running a trans cooler. Like T-Bird has pointed out, heat is an instant killer where your AFT is concerned. You are probably running a small diameter torque converter, but it still should be drained. You are way past due for tr...