Visit The Dirt Forum for More Information

Author Topic:   Targetting the RPM on a briggs.
jammin
Dirt Administrator

Total posts: 5556
posted November 22, 2001 04:54 PM UIN: 16262997
What RPM would a stock briggs need to go to to get you off the turns pretty fast?

30owner
Dirt Full Roller

Total posts: 38
posted November 22, 2001 07:24 PM
Usually on a stocker, your max. rpm's are between 6200 and 7000 depending on cam and valve spring pressure variations. Plate motors rpm's are considerably lower.

30owner

30owner
Dirt Full Roller

Total posts: 38
posted November 22, 2001 07:37 PM
If this is a purple plate motor for your boy, they usually like between 4800 and 5500 max rpm's depending on cam and how they are set-up. Anything I can help you with just let me know. I built quite a few purple plate motors this year and my son is also starting next year.

30owner

jammin
Dirt Administrator

Total posts: 5556
posted November 22, 2001 07:39 PM UIN: 16262997
Dayton from Kinetic Performance built us 2...one gas practice engine and an AKA legal alky motor. We are just getting started. This is gonna be as much fun as learning the modified, I can already tell...he he.

jammin

30owner
Dirt Full Roller

Total posts: 38
posted November 22, 2001 07:46 PM
Oh yeah, these things will make you pull your hair out sometimes. I went from late models to karts and a lot of the times I think the late models were easier to set up and adjust to changing track conditions. When your drivers an 8 year old, he can't tell you much. It's the enjoyment of watching your son race that will outweigh everything and make it all worth it.

30owner

jammin
Dirt Administrator

Total posts: 5556
posted November 22, 2001 08:02 PM UIN: 16262997
I agree totally....seeing him have fun at something I never had a chance to do when I was young makes it all good.

jammin

racer9
Dirt Roller

Total posts: 13
posted December 28, 2001 07:33 PM

I would have the gas motor changed to alky also. Son started with gas then moved up and alky motors are easyer to tune and practice with what you race will help. Just my 2cents.
racer9

BigWayne
Dirt Newbie

Total posts: 2
posted December 29, 2001 08:51 PM UIN: 58420252
Jammin and 30owner. Purple plates kids are great fun! Its great to watch the kids race as hard as they can, come off the track take off their helmets grab their Hotwheels and Match Box cars and go right back to racing in between the trailers. Even though its been 12 yrs. since my boy ran purple, I still get a big kick out of watching them now. Good luck to all the little racers. BigWayne.
PS Thanks Jammin for your help on the computer problem.

racer17j
Dirt Forum Champ
Total posts: 1565
posted February 09, 2002 02:23 PM UIN: 54865418
one of the good things about my old engine builder he had a dyno so we could use that as a guild line as for how to set the clutch and stuff to help find the sweet spot in the power band

Back to the Archives