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Engine complexities

Printed From: Official Baja SAE Forums
Category: General
Forum Name: Design Discussion
Forum Description: Discuss Design, Tech, Cost, and related issues
URL: http://forums.bajasae.net/forum/forum_posts.asp?TID=902
Printed Date: Mar/28/2024 at 6:04am


Topic: Engine complexities
Posted By: Priyank
Subject: Engine complexities
Date Posted: Jan/08/2012 at 9:48am
Hey !
I was going through a design report by UTC, and they assumed the engine (BnS) developed the 10 HP power peak at the governed 3750 RPM.

Well, as far as my knowledge goes, 
An engine develops max power at it's highest RPM, and I've seen my engine going as high as 5500 RPM.

So, what's the deal...who's wrong ?





Replies:
Posted By: ErikHardy
Date Posted: Jan/08/2012 at 11:22am

I've seen my briggs at 7200 rpm... thats a lot of horses! But I think I've seen something in the rules about this...



Posted By: Priyank
Date Posted: Jan/08/2012 at 11:24am
So 5500 wasn't peak either...gosh !! 


Posted By: ErikHardy
Date Posted: Jan/08/2012 at 11:45am
Correct, you need forced induction!


Posted By: Priyank
Date Posted: Jan/08/2012 at 11:45am
But my question stands...
When does BnS deliver top HP ?


Posted By: ErikHardy
Date Posted: Jan/08/2012 at 11:51am
Open the Rules and read every word of it. Then reread it again. It tells you max HP!


Posted By: Priyank
Date Posted: Jan/08/2012 at 12:15pm
Oh you mean the power-rpm curves ?
Correct, yea that's where i should look..!


Posted By: ffriolet
Date Posted: Jan/08/2012 at 6:14pm
Originally posted by 
B2.5.14  B2.5.14  wrote:

Engine Governor
Each engine is equipped with a governor. Each governor will be set at competition to a 3,800 rpm or lower maximum speed. Random inspection of the governor may be conducted at any time. Any attempt to defeat the engine governor so as to increase the engine speed is grounds for is grounds for immediate disqualification. Random inspection of the governor may be conducted at any time.
GOVERNOR SETTING NOT TO EXCEED 3800 RPM.
The governor operation must remain free of obstructions at all times. Governor area must be shielded from debris. The stock configuration of fuel tank mounted to the engine is acceptable for debris management. However, if the fuel tank is to be remote mounted, a debris shield covering the exposed governor area is required. Briggs & Stratton part number 697326 Control Cover may be used or some other part with equivalent features.
NOTE: The governor spring must be placed in hole #6.


-------------
Fred Friolet
Baja ETS
Team captain 2012
Design leader 2011
Driver 2011-2012


Posted By: BadgerMilk
Date Posted: Jan/12/2012 at 2:18pm




Published (and probably predicted) data from the official SAE forums (http://forums.sae.org).  If anyone has done actual dyno testing to back this up, that would be neat.  To my knowledge, nobody is sharing the infos if they have.


Posted By: collinskl1
Date Posted: Jan/12/2012 at 2:52pm
Briggs power numbers have been covered in many threads on this forum...
 
http://forums.bajasae.net/forum/power-curves-for-the-bs_topic839_post11208.html?KW=dyno#11208 - http://forums.bajasae.net/forum/power-curves-for-the-bs_topic839_post11208.html?KW=dyno#11208
 
http://forums.bajasae.net/forum/power-curves-for-the-bs_topic839_post11208.html?KW=dyno#11208 - http://forums.bajasae.net/forum/power-curves-for-the-bs_topic839_post11208.html?KW=dyno#11208
 
I specifically left out one (blueprinting) but if you really want to read it, you can use the mystical search button.


-------------
Kyle Collins
Lipscomb University Alumni
2x Project Manager

Nexteer Automotive
Product Engineer, Electronic Power Steering

... and the 8th simple machine: a bigger hammer.


Posted By: ErikHardy
Date Posted: Jan/12/2012 at 7:02pm
Ahhh...  Blueprinting That was an excellent threadTongue


Posted By: BadgerMilk
Date Posted: Jan/20/2012 at 3:03pm
Originally posted by collinskl1 collinskl1 wrote:

Briggs power numbers have been covered in many threads on this forum...
 
http://forums.bajasae.net/forum/power-curves-for-the-bs_topic839_post11208.html?KW=dyno#11208 - http://forums.bajasae.net/forum/power-curves-for-the-bs_topic839_post11208.html?KW=dyno#11208
 
http://forums.bajasae.net/forum/power-curves-for-the-bs_topic839_post11208.html?KW=dyno#11208 - http://forums.bajasae.net/forum/power-curves-for-the-bs_topic839_post11208.html?KW=dyno#11208
 
I specifically left out one (blueprinting) but if you really want to read it, you can use the mystical search button.


I forgot to link back to those in my post above - that's where I got the links.  Whoops.



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