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Messages - 1967 XR7 GT

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1
FE Technical Forum / Re: Crane ductile iron Rockers
« on: July 25, 2025, 07:27:10 PM »
Hi
I have a set of those rockers, and I posted a picture of them mounted on my  Pro Ports, and Blair Patrick responded that those rockers are short on ratio, I asked how much and the best he could remember was around 1.6". He said the lost of lift wasn't as bad as the lost of valve speed, due to less ratio.

Here's a post about the rockers: https://www.fordfe.com/viewtopic.php?p=1112033#p1112033

2
FE Technical Forum / Re: Corn in the Comet
« on: May 30, 2025, 07:47:59 PM »
       Heads Up for everyone.
AV fuel has deicing agents for the cold at higher altitudes, and can be an issue for our high compression, big buck motors.

AV motors are low compression, and run in the 3,500 to 3,800 rpm range.



[ :)quote author=Rory428 link=topic=12785.msg137240#msg137240 date=1748565072]
Curious how much he special carb, new fuel pump, and other mods cost? Compared to a couple of barrels of Sunoco or VP race gas. I sure wish race gas only cost $10. a gallon here in Canada. I usually get 2 seasons from a 55 gallon drum, usually used VP C12, my las barrel was Sunoco Supreme, as it was a bit cheaper than the VP (at "only $1550. for a 55 gallon barrel!) That worked out to $28. Canadian per US Gallon. I did a back to back to back test between the Sunoco Supreme, Sunoco Standard, and  LL 110 "Av Gas", (my local dragstrip is a municipal airport between race weekends), and my Fairmont ran exactly the same with all 3 fuels on the same rack, on the same day. Guess I will be running the AV gas once I use up all the Sunoco. We don`t`have E85 readily available here, some guys do run Alcohol/Methanol, but that requires a new carb (or fuel injection), fuel pump, fuel lines, and draining the fuel system between race weekends, and lubricating the system . Does E85 require similar maintenance ? More work than I wan to deal with.
[/quote]

3
FE Technical Forum / Re: Break-in Oil Question
« on: April 05, 2025, 04:59:13 AM »
The Brad Penn oils, such as the 10w-30, 20w-50 and even their SAE 70w and their other oils still have levels of the minerals such as phosprous & zinc, just not at the level of thier 30w break-oil. And their multi grade oils are a Semi-Synthetic Blend.

The full synthetic blend oils are thin and tend to have leak issues, from what I've seen. I, am happy with the Brad Penn oils. My water cooled motors I run their 20w-50 Semi-Synthetic Blend, and my air cooled motors I run their SAE 50w here in So California.

4
FE Technical Forum / Re: Edelbrock RPM intake
« on: March 02, 2025, 01:44:55 PM »
Has anyone tested the Edelbrock RPM intake with a notch in the plenum divider like the Blue Thunder intake? Thanks Chuck.

Are you talking about the 1" to 1.250" little notch towards the back of the plenum divider on Blue Thunder Intake ?  Which, there were some other aftermarket manifold companies also had cut them.

If so, the companies that did cut those notches, were so that the 3 Barrel Holley could be used on there manifolds.

5
FE Technical Forum / Re: My Tunnel Port Heads Build
« on: February 23, 2025, 08:55:05 PM »
I, got my heads back after reworking the exh. Originally I went with th SE exh port on the Tunnel Ports with the 1.675" valve, same as the FE Power Cylinder heads with the SE exh port with te 1.675" valve which were flowing around 260 cfm @ .800" lift with no porting.

The problem, the SE exh ports with the 1.675" valve on the TP heads didn't flow the same numbers as the FE Power Cylinder Heads with the SE exh port and the 1.675" valve. The chambers on the TP heads were stock, and so were not designed like the FE Power Cylinder Heads, which had modified chamber locations, relocated valve locations with shorter & longer port lengths.

I, was concerned with the exh, so I had them ported, so the SE port with the 1.675" valve and ported,  didn't flow worth a crap.
I, had shrouding issues, I wanted a 4.250" bore chamber hence the shrouding issue. Ended up opening the Chamber to a 4.300" Bore to help relieve the shrouding issue a little.

Next, it was recommended to increase valve size to 1.750", to open the throat of the valve seat for better flow. It was also recommended to run a Tulip valve instead of the nail head design I was using. I believe the Tulip was a 25 degree angle, and the weight  from the 1.675" valve to the 1.735" Tulip went from 106g to 118g. As you can see the 1.750" valve is now 1.735" and that was due to flow testing, which determined that the Valve Margins need to be increased to help flow, I measured the magin and it's at about .090", I don't know what it was before the valve was cut down from 1.750" to 1.735".

Flow 1 is with the port work and  the 1.750" valves installed.
Flow 2  is with the valve margin increse 4.300" chamber bore
and chamber work around the exh valve, which picked up
mid range


TP Exh Flow Numbers
Lift.......Flow1.....Flow2
0.100......55..........58
0.200....107........119
0.300....157........181
0.400....189........208
0.500....210........229
0.600....230........240
0.700....242........244
0.800....247........247
                                               
The chamber bore increase to 4.300" may have help to relieve
the Int shrouding slightly and help with flow
   
My TP Heads Int Flow Numbers
.400     258.16 
.500     308.48     
.600     356.53   
.700     390.40
.800     411.79
.900     425.16
     

6
FE Technical Forum / Re: My Tunnel Port Heads Build
« on: December 18, 2024, 01:29:03 PM »
Tunnel Port Chamber

2.300" INT
1.675" EXH

7
Private Classifieds / Re: Tunnel Port Gaskets
« on: November 23, 2024, 08:35:21 PM »
20 Sets left.

8
Private Classifieds / Tunnel Port Gaskets
« on: November 20, 2024, 01:55:05 PM »
InterFace CMP-4000 Material

Gaskets, a pair $61.50 plus shipping
.062" thick

I, have 25 sets. For double the investment, I could of got the price down to $47 a set for 50 sets and down to $38.10 for 250 sets for over 4 times the investment. So, I am breaking even on $61.50 price. The NV-565 could of been had @ $41 a pair for 50 sets, but figured the better material was the better choice.

If anyone is interested in a set post here or PM me.


9
FE Technical Forum / Re: My Tunnel Port Heads Build
« on: November 20, 2024, 06:16:03 AM »
The gaskets I ordered showed.

The initial sample I received, I didn't like the material: NV-565, I didn't like it's feel, it was a crappy lower grade material, I ended up going with a higher grade material, CMP-4000, which should allow re-use several times easily.

NV-565:


The Upgraded CMP-4000:



 

10
FE Technical Forum / Re: My Tunnel Port Heads Build
« on: November 12, 2024, 02:21:12 AM »
Hi
It has 5 angle seat, so I doubt it can be changed. I, think the valve size & port combo may have something to do with the lower lift flow. The other TP flow numbers were with the smaller int, so they had better numbers.

The 2.3" valve didn't do to bad, I am actually happy with it. Some Cubic Inches will probably help.


11
FE Technical Forum / Re: My Tunnel Port Heads Build
« on: November 09, 2024, 05:15:45 PM »
I got my Heads and Manifold back today.

Here are the flow Numbers for the Head's Intk's. Actually, their still a work in progress. Currently the Chamber Bore's are @ 4.250" and are shrouding both the Int's & Exh, so the Chambers will be open up to a 4.310" Bore. I, didn't really want to go that large a bore, but because of the Int size, I have no choice. But then, unshrouding the valves will pick up the flow slightly.

The 1.675" exh valve is too small, I'll be going to a 1.800" valve and opening up the seat to match where the issue lies, it was also recommended to go to Tulip valves to assist flow, but I don't like their extra weight. 



                                                               These specs from bowl cleanup & valve job 
                                                                                 


My TP Heads Int Flow Numbers
.400     258.16 
.500     308.48     
.600     356.53   
.700     390.40
.800     411.79
.900     425.16

 First prototype tunnel port head Ported by Joe Craine
Lift            Intake       Exhaust (no pipe)
.100"          78             58
.200"         155          114
.300"         227          141
.400"         285          192
.500"         330          212
.600"         357          219
.700"         379          222
.800"         390          230  (260 with pipe)

 







Here's a picture of the Epoxied & Ported Int, which had an Averaged flow of 460CFM





The Exh:








12
FE Technical Forum / Re: My Tunnel Port Heads Build
« on: September 30, 2024, 01:06:39 AM »
Richard, are you going to flow them with the 2.3 valves?

I, should have flow numbers after I get them ported.

13
FE Technical Forum / Re: My Tunnel Port Heads Build
« on: September 28, 2024, 10:54:55 AM »
Heads so far.

2.300" Int's
1.675" Exh's



As is, the SE Exh ports flow 240 cfm @ .600" lift.



As is, the stock Int Ports flow 339 cfm @ .600" lift



14
FE Technical Forum / Re: My Tunnel Port Heads Build
« on: September 24, 2024, 07:15:55 AM »
Richard, are you selling them?

I, am trying to work out some issues, to keep costs reasonable, if so, I'll have them for sale.       

15
FE Technical Forum / Re: My Tunnel Port Heads Build
« on: September 22, 2024, 05:25:09 AM »
When we do “ported” factory TP heads, we always fill the floors and I just use a standard Mr Gasket TP intake gasket.

I, thought I would step up and have some ran, since there are none available anywhere. I, bought a set about 6 months ago, Mr. Gasket 205G, a couple months back I was going to pick up a spare set, just to have on hand, but they were no where to be found, so I looked into having some ran, and thought why not fill the gasket in for the raised port.


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