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Blackburn cam

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jpick87
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Joined: 01 Nov 2008
Posts: 190
Location: Baldwin, WI

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PostPosted: Sun Jun 01, 2014 11:11 am    Post subject: Blackburn cam Reply to specific post Reply with quote

I put one of Josh's cams in my A and man that thing pulls better now. It's a completely different beast now. I've only got 4 passes with the new cam but it's running really strong. Price was reasonable turn around was quick and Josh is super nice to talk to. Just thought I would pass along some good feedback for everyone.
Thanks a million Josh!
 
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Bill Riechmann
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Joined: 15 May 2014
Posts: 3


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PostPosted: Sun Jun 01, 2014 11:38 am    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

Josh did my cam and carb on a 49 JD G. Great
results!
 
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Josh Blackburn
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Joined: 28 Dec 2009
Posts: 565


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PostPosted: Sun Jun 01, 2014 3:24 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

Thanks guys. Glad I could help. Just had a customer give
me some Dyno results on one of his projects. Stock stroke
730 gas with .125 over bore, cam and carb I bored for him
pulling 79 hp and still not quite rich enough.
 
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north puller
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Joined: 05 Jan 2010
Posts: 998


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PostPosted: Sun Jun 01, 2014 3:48 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

What compression ratio? That's an impressive number.
 
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2 Cylinder
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Joined: 07 Aug 2002
Posts: 734


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PostPosted: Sun Jun 01, 2014 4:16 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

What were the numbers on the G? And is it stock stroke? What bore size? I have a fairly stock 67 hp G. No stroking, flat head, aluminum high compression .090 over. How much could I gain with a cam setup?
 
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Josh Blackburn
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Posts: 565


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PostPosted: Sun Jun 01, 2014 4:47 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

10.5
 
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gtx1967jewison
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Joined: 21 Oct 2007
Posts: 3136


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PostPosted: Sun Jun 01, 2014 7:01 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

I've wondered if opening the tight spot in the Venturi causes enough reduction in velocity/vacuum that it has trouble pulling enough fuel up? A bigger carb would not have this issue because the size difference between the Venturi & throat is still greater, Unless it was severely oversized. Any thoughts?
 
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gtx1967jewison
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Joined: 21 Oct 2007
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PostPosted: Sun Jun 01, 2014 7:09 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

We have a stock stroke 5" B with his cam that pulls real hard
on the top end. I just finished a stock stroke 4.69" B with the
same compression & valve size, & a "puller" cam grind from
another shop that does not pull nearly as hard. They both idle
real nice. There are a few other differences, but those may get
eliminated soon. It carries the front in 2nd gear for about 50', in
6500# class, with 750# 11 feet ahead of the axle. It's 220
cubes.
 
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gtx1967jewison
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Joined: 21 Oct 2007
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PostPosted: Sun Jun 01, 2014 7:11 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

52hp on the crankshaft, on a belt driven Prony Brake that is dead accurate.
 
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Josh Blackburn
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Joined: 28 Dec 2009
Posts: 565


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PostPosted: Mon Jun 02, 2014 7:54 am    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

Cam and carb work would be worth. 8-10 hp.
 
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Early B
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PostPosted: Mon Jun 02, 2014 8:31 am    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

Hey Josh, should i tell them what my little B that you built is putting out on the dyno? lol I did find a few more horses playing w/the carb since we last spoke.
 
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2 Cylinder
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PostPosted: Mon Jun 02, 2014 1:27 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

What kind of price for the cam & carb work Josh?
 
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Josh Blackburn
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Posts: 565


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PostPosted: Mon Jun 02, 2014 1:28 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

9892775366
 
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gtx1967jewison
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Joined: 21 Oct 2007
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PostPosted: Mon Jun 02, 2014 5:42 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

Did you stroke it?
 
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Early B
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PostPosted: Mon Jun 02, 2014 6:41 pm    Post subject: Re: Blackburn cam Reply to specific post Reply with quote

Yes i have a little stroke. 52 hp at the crank, what you figer that should be at the pto for hp?
 
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