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Best 305 casting numbers

 
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dirtcoupedriver
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Joined: 06 Jan 2009
Posts: 4

237.04 points


1932 Ford Business Coupe

PostPosted: Tue Jan 06, 2009 7:08 pm    Post subject: Best 305 casting numbers Reply with quote

I am running a stock 305 class max 315 C/I with bore.It is bored 60 over. Running a 600 Double pumper, 1 5/8 modified style headers, MSD Ignition, Scat balanced,forged rotating assembly stock weight crank, Flat topped forged pistons,Stock 327 replacement harmonic balancer, Air gap rpm intake. We are allowed stamped roller tip rockers 1.5, or 1.6, 510 lift cam, solid, or hydraulic. Guide plates, Polylocks, Harden push rods, screw in studs. No stud girdles. Must be 1.82 intakes and 1.50 exhaust. Also have a good 8 QT. pan for Circle track racing will be turning a max of 7000 rpm running both dirt and asphalt tracks. Car weighs 2600 ready to race. Chassis is a mid 80,s metric, weight jacks all 4 corners with stock 4 link. Moser 9 inch. Hoosier IMCA G 60,s on front 8 inch rim, American Racing E2 tires On 10 inch wide rim in rear. What head numbers and cam does any one recommend?
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Big Dave
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Joined: 04 Dec 2005
Posts: 2540
Location: Tampa Florida
115863.74 points



PostPosted: Tue Jan 06, 2009 7:38 pm    Post subject: Reply with quote

Persoanlly I would use a 4.030 inch bore block (350) with a 3.00 inch stroke for my 305 short block.

Big Dave
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dirtcoupedriver
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Joined: 06 Jan 2009
Posts: 4

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1932 Ford Business Coupe

PostPosted: Tue Jan 06, 2009 7:43 pm    Post subject: Reply with quote

Lol I wish but no can do must be a 305 block per rules
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TSHACK
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Joined: 03 Dec 2007
Posts: 413
Location: NOR CAL
24503.20 points



PostPosted: Wed Jan 07, 2009 2:57 am    Post subject: Reply with quote

Is there any restrictions on ports, can they be worked over some. I see posts of on other forms where tbi heads ported to the witten & pictorial guide are good to 400 Hp. so they say.
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dirtcoupedriver
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Joined: 06 Jan 2009
Posts: 4

237.04 points


1932 Ford Business Coupe

PostPosted: Wed Jan 07, 2009 6:33 pm    Post subject: Reply with quote

Must be stock 305 heads with no mods except for basic rebuild cannot use vortec heads
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af2
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Joined: 01 Sep 2003
Posts: 5393
Location: grassvalley, ca
66344.46 points


1933 Willys Coupe

PostPosted: Wed Jan 07, 2009 6:44 pm    Post subject: Reply with quote

Big Dave wrote:
Persoanlly I would use a 4.030 inch bore block (350) with a 3.00 inch stroke for my 305 short block.

Big Dave


X2!! 4.030x 3.0= a good one! And 306 ci. Very Happy
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clay
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Joined: 24 Nov 2002
Posts: 3149
Location: South Carolina
315725.05 points


1972 Chevrolet Nova

PostPosted: Wed Jan 07, 2009 10:55 pm    Post subject: Reply with quote

I've only had experience with a few 305's. 2 in truck and one in a Camaro. The one's in the trucks were pretty much turds but the one in the Camaro was respectable. I know other things were at work to make the difference, and I don't know if the heads were even different, but I would look for some in the late 80's Camaro's. Sorry for the limited response, but it's all I know. When you say 0.510" lift, is that at the valve with a 1.5 or 1.6 rocker? I would try to run 1.6's with the cam limit to get the quickest lift. Mechanical will probably be more reliable in the 7000 range. I wouldn't think the lift limit is the problem as the heads are probably tapped out by 0.500" anyway, but I would get the fastest valve action possible. Comp and Isky make specific lift rule cams I know and they would be my first choice. Clay
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Big Dave
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Joined: 04 Dec 2005
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Location: Tampa Florida
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PostPosted: Thu Jan 08, 2009 9:51 am    Post subject: Reply with quote

I would also run a set 350 head gaskets and cut two large reliefs in the block down to just above the top ring to allow the valves to breath as the block and the combustion chamber walls shroud e valves. The engine is restricted in valve size as a set of 2.08" intakes will actually hit the deck of the block on the way open. Look to a 396 block for an idea of the valve reliefs. Your lift will be restricted by valve to piston as well as valve to block interference.

I'm not sure but aren't these 305 class races also claimer races? I might buy a few of your competitors motors to learn what they are doing to be competitive. But I like to know what I'm up against. If I don't have an unfair advantage over the competition, what is the sense in playing? Very Happy

Big Dave
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robins44
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Joined: 29 Dec 2007
Posts: 611

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PostPosted: Thu Jan 08, 2009 3:59 pm    Post subject: Reply with quote

ya claimer series engines are always cool to look at to see how the guys are buildin power cheap.
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dirtcoupedriver
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Joined: 06 Jan 2009
Posts: 4

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1932 Ford Business Coupe

PostPosted: Fri Jan 09, 2009 12:13 am    Post subject: Reply with quote

Thanks the powers that be just solved my problem they opened up the rules and are allowing aftermaket heads woo hoooo
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coppergmc
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Joined: 19 Dec 2005
Posts: 278
Location: Georgia
5857.30 points



PostPosted: Sun Jan 11, 2009 9:11 am    Post subject: Reply with quote

601 casting heads have mid 50cc chambers. www.competitionproducts.com has elgin cam #E1131. Install the cam 4 degrees advanced for best results.
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