Gas Ports
#452592
08/28/09 04:22 PM
08/28/09 04:22 PM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
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master
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OP
master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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Are they worth any power on N/A engines? Seems I read Reher-Morrison was claiming 30-60hp on N/A engines in the 900-1000hp range....
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Gas Ports
[Re: dthemi]
#452594
08/28/09 04:53 PM
08/28/09 04:53 PM
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Joined: Jan 2003
Posts: 5,485 SoCal
Brian Hafliger
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master
Joined: Jan 2003
Posts: 5,485
SoCal
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They are worth a good amount of HP when coupled with a vacume pump, and low tension narrow ring pack. You would also want a different bore finish...TotalSeal rings can set you up with what you need there, and then just have the pistons ported. I prefer lateral gas ports most of the time, unless it's a true drag engine that will be freshened often.
Brian Hafliger
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Re: Gas Ports
[Re: Brian Hafliger]
#452595
08/28/09 07:23 PM
08/28/09 07:23 PM
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Joined: Jun 2003
Posts: 2,411 Weatherford, Texas
RapidusMaximus
top fuel
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top fuel
Joined: Jun 2003
Posts: 2,411
Weatherford, Texas
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All things being equal...if you changed nothing but going to the gas ported piston direction how much, if any, would it change the lean/rich tune-up? Sorry for the requested simple answer to a probably complicated question but...guess?
1968 Plymouth GTX 1974 Dodge P/U Long Bed Stepside 318 2019 Ram 2500 6.4, auto, 4WD
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Re: Gas Ports
[Re: Brian Hafliger]
#452596
08/28/09 07:24 PM
08/28/09 07:24 PM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
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OP
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Posts: 6,293
Rock Springs
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Well my are already purcashed, and they do NOT ave gas ports. Here's the deal, my machinist doesnt have a hone/torque plate for a large bore Hemi. This guy does A1 work, and he is considered a good friend also. I was thinking, that have a so-so hone job, that the gas ports would make up the diff and maybe then some. He explains to me that the Hemi although benefits from a Torque plate, he is confident in making good ring seal without. He said some engine really need them like small block Fords etc.
OK How much does it cost to have a set of piston machined for lateral gas ports? I figure $150 range...but I dont know.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Gas Ports
[Re: dizuster]
#452598
08/28/09 09:04 PM
08/28/09 09:04 PM
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Joined: Aug 2003
Posts: 1,313 Charlotte, NC
LSP
pro stock
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pro stock
Joined: Aug 2003
Posts: 1,313
Charlotte, NC
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Quote:
To be honest, you'd probably be better of spending the money on a torque plate...
10-4, if not, you'll be in my prayers......
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Re: Gas Ports
[Re: emarine01]
#452600
08/28/09 09:59 PM
08/28/09 09:59 PM
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Joined: Jan 2003
Posts: 5,485 SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,485
SoCal
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RPM plays a major role in the question of does my engine need gas ported pistons...
I should say piston speed, so if you have alot of stroke (4.500) and plan on 7000rpm, then I would do the gas ports, and change the ring's around. But without the vacume pump, it'll be alot of money spent with little gains.
It all needs to be done to really see the big gains.
Brian Hafliger
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