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440-1: leave ports in stock form? #187809
01/08/09 02:19 PM
01/08/09 02:19 PM
Joined: Aug 2007
Posts: 33
Kerpen, Germany
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426keith Offline OP
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426keith  Offline OP
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Kerpen, Germany
Hi,
just bought a set of 440-1 heads and realized that the intake ports look not very smooth on the port entry. Is it worth the time smoothing this edge for better flow or are there only little to no gains by doing this?
They are going on my 500cui for 70% drag. Motor gets a Scott Brown 650" lift roller cam and should rev to 7000.
Any ideas are appreciated.
Chris

4932853-P1010083.JPG (115 downloads)
Re: 440-1: leave ports in stock form? [Re: 426keith] #187810
01/08/09 02:39 PM
01/08/09 02:39 PM
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
B G Racing Offline
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B G Racing  Offline
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I would blend the port the runner entrance.The best thing is to bowl port below the valves for some extra power.

Re: 440-1: leave ports in stock form? [Re: 426keith] #187811
01/08/09 02:48 PM
01/08/09 02:48 PM
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ELYRIA,OH
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blownzoom440 Offline
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ELYRIA,OH
do you have a die grinder?
get a sanding cone attachment 300grit paper and smooth what you can,take your time.fuel can collect on the rough casting and not be attomized.
if not you will get by with the way it is.it is just not the best it can be.

Re: 440-1: leave ports in stock form? [Re: 426keith] #187812
01/08/09 03:47 PM
01/08/09 03:47 PM
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Posts: 9,963
Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline
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With minor bowl work i went 9.54 in my dart at 3000 lbs, 499 cubesb with a roller, 12.8/1 compression, and a dominater 9375. So you should see similar performance if you put just a bit of work into the bowls as suggested.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: 440-1: leave ports in stock form? [Re: gregsdart] #187813
01/08/09 08:15 PM
01/08/09 08:15 PM
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Riverside, California
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Lil Demon Offline
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Riverside, California
Quote:

With minor bowl work i went 9.54 in my dart at 3000 lbs, 499 cubesb with a roller, 12.8/1 compression, and a dominater 9375. So you should see similar performance if you put just a bit of work into the bowls as suggested.




Similar - 511 ci, 3160lbs, box stock -1s, tunnel ram, twin 9375 doms - 9.38.

Re: 440-1: leave ports in stock form? [Re: Lil Demon] #187814
01/08/09 09:04 PM
01/08/09 09:04 PM
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griff70440 Offline
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Quote:

With minor bowl work i went 9.54 in my dart at 3000 lbs, 499 cubesb with a roller, 12.8/1 compression, and a dominater 9375. So you should see similar performance if you put just a bit of work into the bowls as suggested.

Quote:

Similar - 511 ci, 3160lbs, box stock -1s, tunnel ram, twin 9375 doms - 9.38.










how much E.T would you guys pick up with fully ported -1s?

mike


Re: 440-1: leave ports in stock form? [Re: griff70440] #187815
01/08/09 09:10 PM
01/08/09 09:10 PM
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Posts: 6,293
Rock Springs
Bob_Coomer Offline
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I picked up a half second after the heads were CNC ported.

Re: 440-1: leave ports in stock form? [Re: Bob_Coomer] #187816
01/08/09 09:15 PM
01/08/09 09:15 PM
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griff70440 Offline
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thats what I wanted to hear!I ran a 9.30 with rpm`s on a 511.I`m changing the heads to a pr 345cnc -1s.I hope to get into the 8`s


mike

Re: 440-1: leave ports in stock form? [Re: griff70440] #187817
01/08/09 09:21 PM
01/08/09 09:21 PM
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long island NY
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Ari440 Offline
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long island NY
Quote:

thats what I wanted to hear!I ran a 9.30 with rpm`s on a 511.I`m changing the heads to a pr 345cnc -1s.I hope to get into the 8`s


mike




what dos the car weigth , cam , gears and slicks


1.39 9.85 - 137 mph
Re: 440-1: leave ports in stock form? [Re: Ari440] #187818
01/08/09 09:31 PM
01/08/09 09:31 PM
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griff70440 Offline
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2750 car
33.5-16-15 tire
456 gear
700 roller

Last edited by griff70440; 01/08/09 09:32 PM.
Re: 440-1: leave ports in stock form? [Re: griff70440] #187819
01/10/09 09:48 AM
01/10/09 09:48 AM
Joined: Aug 2007
Posts: 33
Kerpen, Germany
4
426keith Offline OP
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426keith  Offline OP
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Kerpen, Germany
Thanks guys,
I will disassemble them and give the a treat with the die grinder. CNC is out of my budget, but smoothing everything, especially the bowls I can do myself.

What is best protection for the valveseats when grinding the bowls except not to contact them with the grinder?

Re: 440-1: leave ports in stock form? [Re: 426keith] #187820
01/10/09 09:57 AM
01/10/09 09:57 AM
Joined: Jul 2005
Posts: 8,647
ELYRIA,OH
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blownzoom440 Offline
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ELYRIA,OH
Quote:

Thanks guys,
I will disassemble them and give the a treat with the die grinder. CNC is out of my budget, but smoothing everything, especially the bowls I can do myself.

What is best protection for the valveseats when grinding the bowls except not to contact them with the grinder?



take your time by the seats!using a short extension with sanding cones will be more stable and wont chatter on you with a slower rpm.maybe put tape on the seat.

Re: 440-1: leave ports in stock form? [Re: 426keith] #187821
01/10/09 11:00 AM
01/10/09 11:00 AM
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Pa
Hot 340 Offline
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Hot 340  Offline
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Quote:

Thanks guys,
I will disassemble them and give the a treat with the die grinder. CNC is out of my budget, but smoothing everything, especially the bowls I can do myself.

What is best protection for the valveseats when grinding the bowls except not to contact them with the grinder?


Dont start the grinder till the cutter/drum is below the seats in the bowl. Make sure also to have the right cutter. And for Pete's sake dont let a $1000 head be the first thing you practice on.

Re: 440-1: leave ports in stock form? [Re: Hot 340] #187822
01/10/09 11:20 AM
01/10/09 11:20 AM
Joined: Aug 2007
Posts: 33
Kerpen, Germany
4
426keith Offline OP
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426keith  Offline OP
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Kerpen, Germany
Yes, tape I did use the last times I ported heads. Just wanted to hear how you guys protect them.
Thanks for helping,
Chris







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