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Author
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Topic: Who can port a Cobra lower??
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Tyrant89
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Member # 1033
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posted
2002-07-25 10:10 AM
 
 
I'm going to do a blower, so I wanted to maximize my air-flow. Who in the area does a good job with porting these intakes??
Posts: 260 | From: Salinas, holmes! | Registered: Mar 2002
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Tyrant89
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Member # 1033
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posted
2002-07-25 11:08 AM
I heard that Extrude hone is VERY expensive. Have you had experience with this treatment?
Posts: 260 | From: Salinas, holmes! | Registered: Mar 2002
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yellow67stang
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Member # 903
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posted
2002-07-25 11:28 AM
If you are looking at getting better flow, why dont you sell your intake, and use the money that you get plus the money for port work and buy a bigger intake. Then you have even a better foundation to start with for later.
I have no idea what you are doing with this stuff and how much power you want, but I have a head porting friend that does stuff like that all the time and he never knows why people spend that kind of money($200-$500) on a stock lower.
Eric
Eric
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I like cars.
Posts: 371 | From: Ca. | Registered: Feb 2002
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Tyrant89
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Member # 1033
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posted
2002-07-25 11:37 AM
I have TFS heads (stg 1) a cam, 70mmTB, exhaust etc...
I currently have a Cobra intake. The intake is very visible from the hood vents, so I want to stay with it. Because I am upgrading the injectors & adding a Paxton, I thought this would be a good time to have the intake cleaned up.
Who else has had porting done, & what does it normally cost?
Thanks for the replies!
[ July 25, 2002, 11:38 AM: Message edited by: Tyrant89 ]
Posts: 260 | From: Salinas, holmes! | Registered: Mar 2002
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onesicklx
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Member # 285
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posted
2002-07-25 06:40 PM
are you going novi 2000/1000, if you remenber me i talk to ya at the track. i drive a light blue lx coupe on welds. your car is preaty sick, don't forget to close your hood. ![[Wink]](wink.gif)
Posts: 1955 | From: san jose, CA | Registered: Jun 2001
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Tyrant89
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Member # 1033
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posted
2002-07-25 10:27 PM
Why close the hood?? they can't see my chrome that way!!! ![[Big Grin]](biggrin.gif) LOL
Yea, I'm getting a Novi 2000. Should be here in 10 days. I already have 42lbs inj. & 255 pump. I just figure this would be a great time to mod the intake.
I have never ported anything & have no air tools. I would like to have someone port the upper @ the throttle body. Then have the lower fully ported & blended with the upper.
Extrude Hone runs $500+ shipping. So I'm trying to see what my other options there are. I also found a guy offering a port & polished(in & out) GT-40, he's asking $800.
Posts: 260 | From: Salinas, holmes! | Registered: Mar 2002
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OneBadHatch
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Member # 970
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posted
2002-07-25 11:59 PM
im never going to catch you now shaun ![[Mad]](mad.gif)
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1990 GT
TFS Intake and Cam
AFR 165's
Plus all the goodies
Posts: 834 | From: Oceanside, CA | Registered: Mar 2002
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onesicklx
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Member # 285
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posted
2002-07-26 06:30 AM
quote:
Why close the hood?? they can't see my chrome that way!!! LOL
Yea, I'm getting a Novi 2000. Should be here in 10 days. I already have 42lbs inj. & 255 pump. I just figure this would be a great time to mod the intake.
I have never ported anything & have no air tools. I would like to have someone port the upper @ the throttle body. Then have the lower fully ported & blended with the upper.
Extrude Hone runs $500+ shipping. So I'm trying to see what my other options there are. I also found a guy offering a port & polished(in & out) GT-40, he's asking $800.
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lol , thats what im saying get the n2000, its almost like a race s/c...
Posts: 1955 | From: san jose, CA | Registered: Jun 2001
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John91coupe
CAFords OG
Member # 18
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posted
2002-07-26 06:45 AM
I agree with yellow67stang. The GT-40 intake is not a great candidate for porting, especially if you are using the GT-40 tube upper. No matter what you do to the lower you will always be constrained by the cross section area of the tubing, which is not very big and cannot be ported. They are pretty but if you want a real performance intake I would sell the GT-40 upper and lower to someone who prefers pretty to performance. Most of the recent aftermarket intakes are heads above the old technology of the GT-40, which is 15 years old.
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D-2R ProCharged R302 331
1.410 60 ft.
5.784 @ 122.92 1/8
8.953 @ 155.08
MM&FF Feature June 2003
Posts: 1361 | From: Grass Valley, CA | Registered: Sep 2000
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Tyrant89
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Member # 1033
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posted
2002-07-26 10:26 AM
GT-40??
I never said I had a GT-40.
I'm sticking with the Cobra intake. My intake is visible from the street because of large slots in the hood. My car has a "cobra" theme to it, so I would prefer to stay with this intake.
I understand that there are better intakes out there, but I am willing to make a small power sacrifice on this one.
So, has anyone had or know of a reputable location to have this done at??
Thanks for your help,
Shaun
Posts: 260 | From: Salinas, holmes! | Registered: Mar 2002
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John91coupe
CAFords OG
Member # 18
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posted
2002-07-26 11:19 AM
Oh, sorry about that. The lower is the same as a GT-40, no? Circular port inlets at the upper/lower interface?
Posts: 1361 | From: Grass Valley, CA | Registered: Sep 2000
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yellow67stang
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Member # 903
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posted
2002-07-26 11:20 AM
I think he means Cobra.
Do you have the heads off? Most likely you will need to give any reputable shop both so they can match your intake to the heads. I don't know what heads you have but a friend of mines Cobra lower needed to be opened up majority to fit the ports of his Windsor Sr. heads. He was sorta in the same boat you are in. He wishes that he bought another intake!
I am sure Angie@Daves Machine in Fremont can help you out. There number is 510-797-9536
Hutchison Racing in Sacramento can do it
916-483-9563
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I like cars.
Posts: 371 | From: Ca. | Registered: Feb 2002
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John91coupe
CAFords OG
Member # 18
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posted
2002-07-26 11:31 AM
But isn't the Cobra lower the same as the GT-40 lower?
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D-2R ProCharged R302 331
1.410 60 ft.
5.784 @ 122.92 1/8
8.953 @ 155.08
MM&FF Feature June 2003
Posts: 1361 | From: Grass Valley, CA | Registered: Sep 2000
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yellow67stang
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Member # 903
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posted
2002-07-26 12:02 PM
I dunno. Its been a long time since I have seen one up close.
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I like cars.
Posts: 371 | From: Ca. | Registered: Feb 2002
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John91coupe
CAFords OG
Member # 18
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posted
2002-07-26 01:40 PM
I think Gromm Racing in SJ can port the stuff for you (hand port, not extrude hone). I wouldn't extrude hone the lower anyway, I would only have it hand ported. They require some special attention to make sure you end up with a tapered cross section, which can be a problem due to the limited amount of material around the upper portion of the port. You can calculate how well you will get a taper if you know the dimensions on your head ports. If the cross section area at the head is bigger than the maximum hole you can get at the upper/lower interface, then you have a problem. Like if it's a 1250 gasket then you will be OK but if it's a 1262 you will have problems making the holes big enough to get a good taper. A good porter will probably know this though.
Cost of doing the upper will probably be a wash between extrude honing and hand porting. If you want a full hand port on the upper it will cost more because they will cut it open to get at the plenum and then weld it back together. If you have the dough, you might want to hand port the upper and then do a light extrude on it. It will be easier to control the port match (upper to lower) with hand porting. I had this process done to a Vortech/Saleen upper that I once had and it came out beautiful.
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D-2R ProCharged R302 331
1.410 60 ft.
5.784 @ 122.92 1/8
8.953 @ 155.08
MM&FF Feature June 2003
Posts: 1361 | From: Grass Valley, CA | Registered: Sep 2000
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onesicklx
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Member # 285
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posted
2002-07-26 05:20 PM
quote:
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But isn't the Cobra lower the same as the GT-40 lower?
ya, arent they the same....
Posts: 1955 | From: san jose, CA | Registered: Jun 2001
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onesicklx
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Member # 285
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posted
2002-07-26 05:23 PM
opps sorry...
Posts: 1955 | From: san jose, CA | Registered: Jun 2001
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Tyrant89
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Member # 1033
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posted
2002-07-26 08:26 PM
Cool thanks for the contacts, I will call these guys and see what they charge.
Yes, the GT-40 & Cobra share the same lower, but the Cobra can be more heavily ported than the GT-40, if needed. There is a great article in March's MM&FF about intake mods. Extrude Hone has the advantage of cooling the incoming air, in addition to increased flow. It's $500+ shipping + a 3 week down time.
Posts: 260 | From: Salinas, holmes! | Registered: Mar 2002
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JoeT
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Member # 298
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posted
2002-07-27 09:59 AM
The Holley Systemax intake at $350-$400 used or $550 brand new will be head and shoulders box stock above whatever you can get out of the cobra intake (which is just the cast version of the GT-40 intake).
But hey, even the stock, unported HO intake will make plenty of power behind a TFS Novi 2000 setup
Posts: 6785 | From: San Jose | Registered: Jun 2001
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Stimson
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Member # 51
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posted
2002-07-27 11:42 AM
quote:
Originally posted by yellow67stang:
If you are looking at getting better flow, why dont you sell your intake, and use the money that you get plus the money for port work and buy a bigger intake. Then you have even a better foundation to start with for later.
I couldn't agree more with this line of thinking! Why pay someone several hundred dollars to grind the "holes"(ports) bigger for you when you can simply for the same amount of money BUY an intake with bigger "holes"(ports)?
Tyrant89- Buy a Performer RPM or a TFS track heat head and be done with it.
Posts: 2373 | Registered: Jun 2000
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Rickster
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Member # 962
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posted
2002-07-29 10:25 AM
Doesn't the newer Explorer/Cobra upper & lower flow better than a GT-40 anyway? (and has room for porting if wanted) I believe the Explorer Cobra upper has a spot for the bolt on emblem to, so you could keep your "Cobra" emblem, have better flowing intake (stock) and have the ability to port it if wanted......?
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1965 ACCobra Replica (FFR MKll)
w/ 1992 LX convert. running gear
Planning ahead for that midlife crissis!
Posts: 131 | From: Cedar Ridge | Registered: Mar 2002
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Rickster
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Member # 962
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posted
2002-07-29 10:38 AM
Here is a picture I found on Ebay....
[IMG]http://ebay0.ipixmedia.com/abc/M28/_EBAY_b0733dc06d0d90ee9980320f9493d583/i-1_B.JPG
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1965 ACCobra Replica (FFR MKll)
w/ 1992 LX convert. running gear
Planning ahead for that midlife crissis!
Posts: 131 | From: Cedar Ridge | Registered: Mar 2002
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