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Forum: Car Nitro & Gas Engines

03-11-2011, 07:56 AM

Replies: 73

Induction Timing

Views: 21,667

Posted By Anthoop

RE: Induction Timing

I do not know how excel works.
If you print out the instructions (from step a onwards) and the picture attachments in Jims first post, it should be fairly simple to work through each step with a...

Forum: Car Nitro & Gas Engines

03-10-2011, 12:00 PM

Replies: 73

Induction Timing

Views: 21,667

Posted By Anthoop

RE: Induction Timing

It is only maths...who is excel? :)
The timing wheel can give you opening and closing point in relation to the piston, a simple calculation from that will tell you duration.

Forum: Car Nitro & Gas Engines

03-10-2011, 10:02 AM

Replies: 73

Induction Timing

Views: 21,667

Posted By Anthoop

RE: Induction Timing

The induction port is the square shaped hole along the length of the shaft. Picture below.

You do not have to measure H1, you calculate it from the other measurements.

Forum: Car Nitro & Gas Engines

10-01-2007, 04:32 PM

Replies: 73

Induction Timing

Views: 21,667

Posted By Anthoop

RE: Induction Timing

Jim,you could just buy a manual micro mill that will do a proficient job and you could always upgrade by attaching stepper motors and the electronics.The manual mill will do the same job as the cnc...

Forum: Car Nitro & Gas Engines

09-27-2007, 05:02 PM

Replies: 73

Induction Timing

Views: 21,667

Posted By Anthoop

RE: Induction Timing

No mate i had already "assumed" that you could take into account the sleeve wall thickness and the proposed port angle and using mathematics it would be easy to calculate the desired height/depth of...

Forum: Car Nitro & Gas Engines

09-27-2007, 03:12 PM

Replies: 73

Induction Timing

Views: 21,667

Posted By Anthoop

RE: Induction Timing

I see where your coming from and yes if the top of your port was square that's an accurate method.However i think the profile of the port should direct gases with minimal airflow...

Forum: Car Nitro & Gas Engines

06-17-2007, 05:18 PM

Replies: 73

Induction Timing

Views: 21,667

Posted By Anthoop

RE: Induction Timing

;)Ah so now i see why i'm confused.I would call the opening and closing points(relative to piston posistion)the induction timing and the period between these points the induction duration.
Ant.

Forum: Car Nitro & Gas Engines

06-17-2007, 12:30 PM

Replies: 73

Induction Timing

Views: 21,667

Posted By Anthoop

RE: Induction Timing

;)I don't think you understand what i'm saying.Disregarding the sleeve for a moment.Wouldn't the crank timing figures be quoted relative to the piston posistion as in;the crank window opens at x...

Forum: Car Nitro & Gas Engines

06-17-2007, 07:14 AM

Replies: 73

Induction Timing

Views: 21,667

Posted By Anthoop

RE: Induction Timing

Hi SAVAGEJIM
Am i missing something?I've read through more than a couple of times and i can't understand how we can calculate the crank timing when there is no reference to crankpin/piston...

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