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Building Tips and technical articles. => ARF'S => Topic started by: Ron Merrill on February 10, 2011, 10:31:07 AM

Title: Impact
Post by: Ron Merrill on February 10, 2011, 10:31:07 AM

Anyone know what rise in header pipe (Rojett .61) i need for the impact. I am going to buy a Randy pipe. Many Thanks. Ron.

Title: Re: Impact
Post by: Howard Rush on February 10, 2011, 01:29:00 PM

I looked at my records and saw that the header I got from Jett has a 1.5" rise, but the UHP Impact may not match mine.  Paul Walker is probably the guy to ask about which Randy pipe to use.  Which pipe works best may be a function of your exhaust timing.  One thing to keep in mind is that the screws that hold the header to the engine are 5-40s.  If you use 4-40 screws, you are screwed. 

Title: Re: Impact
Post by: Ron Merrill on February 10, 2011, 02:48:38 PM

Thanks Howard, my Rojett has Bretts timing as i requested from Dub, but i will also check with Paul.

Title: Re: Impact
Post by: Terry Bernard on February 11, 2011, 07:17:04 AM

Howard gets the award for :

"Best contribution to a thread".



Terry.

Title: Re: Impact
Post by: Steve Helmick on February 11, 2011, 08:24:27 PM

You could substitute 3mm x .6 metric screws for the 5-40's, Howard.  LL~ LL~ LL~ LL~ LL~ Steve

Title: Re: Impact
Post by: Brett Buck on February 14, 2011, 10:35:42 PM

Quote from: Steve Helmick on February 11, 2011, 08:24:27 PM

You could substitute 3mm x .6 metric screws for the 5-40's, Howard.

  Oh, yeah, start that up again please!

    Brett

Title: Re: Impact
Post by: Ron Merrill on February 27, 2011, 08:41:46 AM

Thanks, got the header pipe (1.5 rise) and now waiting fro pipe from Randy. Thanks for the great help. Howard the motor came with the right bolts for header. Ron.