Oliver 70 pullers

B.G. ANGELL · Posted: Sun Jan 20, 2013 1:43 pm Post subject: Oliver 70 pullers

Going to pull an Oliver 70 next season and I'm aiming for the 2.5- 3.5 mph classes. with a set of 13.6-38" tires what kind of speeds are you guys running and what rpm ? What is the stock rpm for a 70?

B.G. ANGELL · Posted: Sun Jan 20, 2013 1:45 pm Post subject: Re: Oliver 70 pullers

Also what is the lightest possible class for a 70?

puln70 · Regular Joined: 22 Aug 2007 Posts: 64 Report to Moderator

One a wetter clay track I usually stay in first,if it's looser I've pulled in second & one time on a sandy track I pulled in 3rd.
My motor is bored,ported & ground the head.
I pulled in 3500 antique,it's a 39 w/13.6
I could usually put a weight (100lbs) on the front in the 3500 class,you need to make the rear lighter as the front tires would always pick up towards the end.
To really do any good you'll need to stroke it.
Good Luck

puln70 · Regular Joined: 22 Aug 2007 Posts: 64 Report to Moderator

rpm is 1640

Bryce · Posted: Sun Jan 20, 2013 5:42 pm Post subject: Re: Oliver 70 pullers

1645 for the 5 gear, 1600 for the 3 gear.lp

puln70 · Regular Joined: 22 Aug 2007 Posts: 64 Report to Moderator

http://natpa.com/rpm_chart_2001.htm

Bryce · Posted: Tue Jan 22, 2013 7:22 am Post subject: Re: Oliver 70 pullers

Try the more accurate oliver manual.natpa has some mistakes through out there charts.

puln70 · Regular Joined: 22 Aug 2007 Posts: 64 Report to Moderator

I just figured if your pulling then that's what you might want to go by?

puln70 · Regular Joined: 22 Aug 2007 Posts: 64 Report to Moderator

I just figured if your pulling then that's what you might want to go by?

Bryce · Posted: Wed Jan 23, 2013 7:26 am Post subject: Re: Oliver 70 pullers

Depends on where you are pulling, Sigourney goes off of the 3 gear rpm.

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