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FE Power Forums => FE Technical Forum => Topic started by: Djr031987 on September 12, 2013, 11:31:10 PM

Title: 800 hp SOHC
Post by: Djr031987 on September 12, 2013, 11:31:10 PM

Hey guys has anyone ever heard of a 427 SOHC engine pushing 800 hp on pump gas?

Title: Re: 800 hp SOHC
Post by: Barry_R on September 13, 2013, 02:44:18 AM

Yes.
This one was 11.5:1 and would run/does run on pump premium.
I'm sure Jay has some as well....

http://www.youtube.com/watch?v=Il0gIgevtms

Title: Re: 800 hp SOHC
Post by: jayb on September 13, 2013, 08:42:08 AM

I've had a 510" and 530" SOHC both go over 800, and my big one (585") went 935 HP at first, and then 960 HP when I switched to a distributorless ignition.  Dyno data for the big SOHC is at the link below:

http://www.fepower.net/dyno_results.html

Title: Re: 800 hp SOHC
Post by: Djr031987 on September 13, 2013, 08:28:27 PM

I have heard rumors of some SOHC spinning at up to 8000 rpm!! Is that true?

Title: Re: 800 hp SOHC
Post by: jayb on September 14, 2013, 01:33:04 PM

8000 RPM is not that tough for an SOHC, especially with lightweight valves; been there quite a few times, even with heavy valves. Especially for a smaller engine, 9000 RPM is not beyond the realm of possibility.

Title: Re: 800 hp SOHC
Post by: blackthunder1970 on September 14, 2013, 06:45:48 PM

hi
what size cams would you need to make 800 horse power with 482 and 10.5 com
cheers
barry

Title: There's 25HP in switching to distributorless ignition??????
Post by: Qikbbstang on September 27, 2013, 10:50:40 PM

 935 HP at first, and then 960 HP when I switched to a distributorless ignition.

Title: Re: 800 hp SOHC
Post by: Mike Caruso on December 08, 2013, 10:15:59 AM

Quote from: jayb on September 13, 2013, 08:42:08 AM

I've had a 510" and 530" SOHC both go over 800, and my big one (585") went 935 HP at first, and then 960 HP when I switched to a distributorless ignition.  Dyno data for the big SOHC is at the link below:

http://www.fepower.net/dyno_results.html

Nice Dyno sheet's it shows just like Dyno Don told me after building a stroker Cammer at about 7000 it is all done. He ran his 427's about 7500 Max wow that was a real long time ago.
It is always nice to straighten out a problem like with your first ignition and get all the power out that was in the engine. Day's on the Dyno like that make you forget about all the hours and hours of time spent on the Dyno. Well almost! LOL