Briggs Flathead/Raptor RPM (5HP)

[noahsm1th]

I have a Briggs raptor and i don't have the Billet Flywheel, i have the Billet connecting Rod tho... i was wondering, what rpm will the flywheel break/explode at?? i know there is no telling an exact number but i'm looking for a ballpark until i can get a billet flywheel... i will stay under that limit about 1000 rpm to be safe. THANKS!!

 

[sundog]

Keep top rpm at 6,000 and you will make your best power on a basically stock engine.

 

[meracer9]

I turn my WKA flatheads 7000 rpm all night long.. Turned some controlled stocks 7500 rpm back in the day and never had an issue with the stock flywheel..

 

[noahsm1th]

to be honest i think i'm going to just get a billet one so i can be safe lol, don't want to loose an arm so i think its definitely worth it...

 

[Kj26]

68-7000 on our WKA flattie. Let it eat !!!!

 

[OVALTECH1]

Same here as long as that flywheel is in safe shape ( no hammer or pry bar marks and doesn’t have and fins missing) put it on and have fun. I run mine up to 7,000 every weekend

 

[OVALTECH1]

Same here as long as that flywheel is in safe shape ( no hammer or pry bar marks and doesn’t have any fins missing) put it on and have fun. I run mine up to 7,000 every weekend

 

[racing promotor]

Everyone turns them 6800 to 7000.

 

[CarlsonMotorsports]

I've seen them turn 10G+ back in the day but that's also when they started coming apart and the rules were changed.
If this is for a backyard application and it makes you feel safer with a billet flywheel, then by all means, do so.
If this is for a stock class racing (legal) application, then you will need to run the stock cast iron flywheel.


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