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Virginia Jenkins

(1 posts)

01/13/2018 03:03AM

Main British Car:

Can someone explain F1 N.A. engines?
Posted by: VirginiaJenkins
Date: March 31, 2018 09:59AM


So from what I know, F1 N.A. engines have for a long time been engines with short strokes, big bores, relatively low torque and RPM as high as possible.
So I know that for the same amount of torque, higher RPM equals higher power, and I guess shorter strokes work better at higher RPM, but apart from that I'd like to know why they did things like they did:
Pretty much no other racing series that I know of have engines like that, so why did they do things like that in F1?
What would be the downsides of an engine with longer strokes and narrower bores? Couldn't they achieve the same power with more torque and lower revs? (All of that with N.A. engines).

Please help.

I did not find the right solution from the internet.


Moderator's note: I deleted the spam part of this message but left the bait because the question is interesting. Enjoy!

Edited 1 time(s). Last edit at 04/01/2018 12:13AM by Moderator.

Carl Floyd
Kingsport, TN
(3635 posts)

10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: Can someone explain F1 N.A. engines?
Posted by: MGBV8
Date: April 01, 2018 12:35PM

Larger bore allows better breathing (unshrouding valves, larger valves).

Longer stroke, piston travels farther, more friction.



Joseph Padavano
Northern Virginia
(121 posts)

02/15/2010 03:49PM

Main British Car:
1962 F-85 Deluxe wagon 215 Olds

Re: Can someone explain F1 N.A. engines?
Posted by: joe_padavano
Date: April 07, 2018 11:48AM

The more mass flow of air in and out of an engine, the more power you make, period. When displacement is fixed by rules, higher RPM means more airflow and thus more HP.

Of course, there are second order effects that can drive the specifics of a race engine design. These days, packaging for aerodynamics is a big factor. Bore and stroke can be driven by fitting within a specific packaging shape and volume as much as anything else.

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