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Search found 3387 matches

by David Redszus
Wed Aug 04, 2021 11:51 pm
Forum: Engine Tech
Topic: Port Injection Strategies Paper: Key Takeaways on Open Valve Injection?
Replies: 8
Views: 264

Re: Port Injection Strategies Paper: Key Takeaways on Open Valve Injection?

Sure, but if you're trying to use the late, open valve injection strategy to improve fuel economy at highway cruise RPM, then you just size the injector to be large enough so that it's spraying after overlap ends and before the intake valve closes at whatever your RPM is at say 75 mph and don't wor...
by David Redszus
Tue Aug 03, 2021 7:09 pm
Forum: Engine Tech
Topic: Port Injection Strategies Paper: Key Takeaways on Open Valve Injection?
Replies: 8
Views: 264

Re: Port Injection Strategies Paper: Key Takeaways on Open Valve Injection?

It's nice to see someone take on a complex subject and provide technical information from qualified sources. We have built and raced engines with high pressure (450psi) fuel injection system since 1974. For many years they assumed the cloak of mystery and dark science. Until we were able to apply a ...
by David Redszus
Mon Aug 02, 2021 4:53 pm
Forum: Engine Tech
Topic: adjustable or 10-15 psi oil warning light switch - also 30 psi low fuel pressure switch.
Replies: 5
Views: 257

Re: adjustable or 10-15 psi oil warning light switch - also 30 psi low fuel pressure switch.

Most data collection systems provide high and low pressure alarm warnings on their displays.
Not only will pressure (or temp) values be displayed, they can be recorded as well.

They work with any pressure sensors.
by David Redszus
Mon Aug 02, 2021 4:50 pm
Forum: Engine Tech
Topic: Q16 or M5?
Replies: 14
Views: 508

Re: Q16 or M5?

408 Nova wrote: Mon Aug 02, 2021 10:42 am Fuel systems up front?

Also, which fuel is best for na?
Q16.
by David Redszus
Mon Aug 02, 2021 12:47 pm
Forum: Engine Tech
Topic: New spark plug design
Replies: 24
Views: 1388

Re: New spark plug design

The intensity of a spark during the glow discharge phase is not uniform along its length but is strongest right where the spark enters or leaves a metal surface. A conventional plug has two of these surfaces at any given time. This plug has four surfaces. So maybe there is a difference. Don’t reall...
by David Redszus
Tue Jul 27, 2021 5:57 pm
Forum: Engine Tech
Topic: Principles of exhaust design!
Replies: 4
Views: 386

Re: Principles of exhaust design!

Greetings gearheads, I have been in correspondence with Calvin Elston in the not so distance past to gain a deeper understanding of exhaust design. He pointed almost confusing details of exhaust behavior and considerations. I wanted to poll the group about an general 'Ideal' design. What are the pr...
by David Redszus
Mon Jul 26, 2021 12:23 pm
Forum: General Tech
Topic: Book: The Horsepower Chain
Replies: 6
Views: 347

Re: Book: The Horsepower Chain

goldfingerfif wrote: Mon Jul 12, 2021 4:29 pm Nobody has anything or maybe a pdf if it has already been scanned in? I've tried searching everywhere and it is impossible to find.
Yes I have the book in my library, with companion CD. Send me your contact info so we can discuss details.
by David Redszus
Sat Jul 24, 2021 1:05 pm
Forum: Engine Tech
Topic: Blaster Cabinet Help
Replies: 28
Views: 910

Re: Blaster Cabinet Help

Don't use sand, Silicosis kills people Glass bead IS silica, just the shape is different. The longer it is used it becomes silica dust. And, yes, silica dust is very bad for your health. Ergo the need for a good filter system. Incorrect [-X Silicosis is caused by breakdown of 'crystalline' silicon,...
by David Redszus
Sat Jul 24, 2021 12:58 pm
Forum: Engine Tech
Topic: New spark plug design
Replies: 24
Views: 1388

Re: New spark plug design

Delivers The Most Powerful SPARK EVER Directly to the
Core of your Cylinder For a Complete Clean Combustion.
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by David Redszus
Wed Jul 21, 2021 9:16 pm
Forum: Engine Tech
Topic: Blaster Cabinet Help
Replies: 28
Views: 910

Re: Blaster Cabinet Help

Don't use sand, Silicosis kills people
Glass bead IS silica, just the shape is different. The longer it is used it becomes silica dust.

And, yes, silica dust is very bad for your health. Ergo the need for a good filter system.
by David Redszus
Wed Jul 21, 2021 9:07 pm
Forum: Engine Tech
Topic: Air Cooled VW question...
Replies: 6
Views: 416

Re: Air Cooled VW question...

Nothing wrong with my stock pushrods and they will stay put. Just wondering how you get away with zero lash on a solid lifter cam in an air cooled engine. Compare the thermal growth of the head to that of the air-cooled cylinders. The only time I ever replaced a push rod in a VW (or Porsche 356,) i...
by David Redszus
Wed Jul 21, 2021 8:58 pm
Forum: Engine Tech
Topic: Safe exhaust valves clearance
Replies: 9
Views: 797

Re: Safe exhaust valves clearance

Hi, I found an Euro manufacturer that sells camshafts with a lash ramp for an exhaust valve clearance (0.0078-0.0086) being smaller than the minimum advised by the engine manufacturer (0.0110 to 0.0149): isn't 0.0078 a bit too tight for a turbo engine exhaust valve, considering the valve stem elong...
by David Redszus
Tue Jul 20, 2021 6:40 pm
Forum: Engine Tech
Topic: Any distributor machine users here?
Replies: 32
Views: 8379

Re: Any distributor machine users here?

Excellent topic, but the original innovate link does not work. Has anyone modernized their distributor machine? Might I ask, what do you mean by "modernizing their distributor machine"? Recently completely rebuilt my Sun 504 distributor machine, replacing the vacuum tube, selected capacitors, beari...
by David Redszus
Tue Jul 20, 2021 11:45 am
Forum: Engine Tech
Topic: Blaster Cabinet Help
Replies: 28
Views: 910

Re: Blaster Cabinet Help

While I have no specific blast cabinet to recommend, I have learned a few things regarding blasting over the last 50 years. Blast cabinets must not leak blasting media dust; a functioning vacuum media recovery system is critical. Blast cabinets must have adequate interior lighting. This becomes impo...
by David Redszus
Thu Jul 15, 2021 12:57 pm
Forum: Engine Tech
Topic: Transition from exhaust port to muffler
Replies: 6
Views: 384

Re: Transition from exhaust port to muffler

I would need advice what brings best results and how the transition from my exhaust port to muffler should be designed. Im building an bmw m20 engine, where I have 36mm exhaust valves, then commes the port which at its end has about 40mm. Im using an race header with 45mm pimary pipes. Now im askin...