Jesse builds another Cobra #11,061 - Cooling system and Headers

[TTimmy]

Tight quarters in that engine compartment - congrats on getting that engine shoehorned in. Well done!

Regarding shifter position, my Mk3 is in the same place in regards to the frame. Since mine is a 302 it is in the “forward” of the two rear options on my TKO. With the supplied shifter’s radical angle everything ends up in a good place. Any further back and my arm gets jammed up against the seat. Hard to tell but here’s some photos:

[cv2065]

That's a lot of yoke showing out f the transmission, are you sure you have the correct length driveshaft?

I agree with Mike. Might want to verify with FFR.

[gbranham]

That's definitely the wrong driveshaft. That's the driveshaft I have in my IRS/TKX/427W setup. Before I switched to SBF from Coyote, I had a longer driveshaft that came with my kit, and it was longer than my current driveshaft by about the same amount of yoke you have showing there. I think you have the SBF/TKX/IRS driveshaft.

Greg

[460.465USMC]

It's definitely tight on the drivers side. Really only have a couple of mm. I would assume some contact when the engine torques but we will see.

Congrats on the drivetrain install! Yep. It's one. Tight. Fit. So glad I had a local F5 builder help me shoehorn it into place on my Roadster. My driver's side looked similar to yours. I had the TKO and the Gen 3, but I didn't have nearly that much driveshaft exposed.

Squeezing this motor in is one of those experiences you don't forget. As they say, "If you know. You know". Great work!

[Blitzboy54]

Thanks gang. That’s why I have a build thread. Great way to double check. I’ll reach out to FFR.

[Nigel Allen]

It's definitely tight on the drivers side. Really only have a couple of mm. I would assume some contact when the engine torques but we will see.

My Coyote was as tight as that. 5 years on the road, with some decent canings. No sign of any contact with the upper foot boxes to date. Engine does not seem to move around at all. Good news

Cheers,

Nige

[Blitzboy54]

Driveshaft update

The forum remains undefeated. I reached out to FFR and they confirmed I have the wrong drive shaft. I have an 8 inch and need a 10 inch. Replacement is on the way, so thanks everyone for looking out.


Coyote Wiring

I got started on the coyote control pack wiring. As I was laying everything out I noticed I have a problem with the alternator cable on the Ron Francis harness. The instructions say to route the cable under the engine mount to keep it safe from the header. As you can see in this picture if I go that way I come up about 4 inches short. I have to figure out what to do next. I think I am going to use a 2 wire bus bar. I will terminate it there and run a new longer line to the alternator.



I am using Autometer gauges so I needed to run the tach adapter for the Coyote. The instructions are clear that you need to tap into the purple tach wire that feeds all 8 cylinders.







I ran some clamps down the front of the passenger footbox and connected the starter wires. You can also see the orange fan pigtail. Once the radiator is installed I will splice this into the RF connector.



The coyote control pack harness is installed and integrated.

[Blitzboy54]

Tight quarters in that engine compartment - congrats on getting that engine shoehorned in. Well done!

Regarding shifter position, my Mk3 is in the same place in regards to the frame. Since mine is a 302 it is in the “forward” of the two rear options on my TKO. With the supplied shifter’s radical angle everything ends up in a good place. Any further back and my arm gets jammed up against the seat. Hard to tell but here’s some photos:

I appreciate the pics! I am going to do a short straight shifter at or near the front. I want it where it would be if it were a modern car. I think the mid shift is too close because I have a screen right there. Looking forward to figuring it all out.

[Blitzboy54]

Power Steering

I routed the power steering hoses. I was pleasantly surprised I could get both of them run to the passenger side of the engine and still clear the battery. I am pretty sure I am in good shape here but if the collective see's something I missed please let me know.







I do have something I need to figure out. I would like to add steering rack limiters before I put the radiator in. However I don't have tires for my rims. It doesn't make sense to use the temp wheels. I think I might try to simulate the tires somehow. Maybe foam? I'm open to ideas.

Factory Five came through and got me the right drive shaft. This looks a lot better.

[gbranham]

Delete...double post

[gbranham]

I see you installed the 'hoop' over the passenger side mount for the steering rack, as provided by FFR as a precaution for weld failure. I did, as well. I didn't like how the PS hard line sits just above it, worried that it may vibrate and wear against that hoop. As an extra precaution, I put a short length of split fuel injection hose on that hard line, secured with a couple of zip ties. Just a thought.
HeadlightTest1.jpg

[cv2065]

Looks good Jesse. Looks like you are faring better than I. The pump I've got from Roush is from Turn One steering and they didn't give me an integrated reservoir. Not a fan of the remote cannister so may change the pump as it's not as simple as just adding an integrated reservoir. Glad you found the right driveshaft!

[Blitzboy54]

I see you installed the 'hoop' over the passenger side mount for the steering rack, as provided by FFR as a precaution for weld failure. I did, as well. I didn't like how the PS hard line sits just above it, worried that it may vibrate and wear against that hoop. As an extra precaution, I put a short length of split fuel injection hose on that hard line, secured with a couple of zip ties. Just a thought.
HeadlightTest1.jpg

That tube just passes air back and forth to the grease boots, however what you did is not a bad idea. There is some contact between the power steering hoses and it. The car will vibrate and I can't get a hose clamp in there. I may copy what you did.

Looks good Jesse. Looks like you are faring better than I. The pump I've got from Roush is from Turn One steering and they didn't give me an integrated reservoir. Not a fan of the remote cannister so may change the pump as it's not as simple as just adding an integrated reservoir. Glad you found the right driveshaft!

The FFR instructions still show a remote reservoir. I like the integrated arrangement better as well. There is only so much room to hang stuff. Should be plenty of pump options for an SBF. Good luck, looking forward to your next update.

[Blitzboy54]

More Coyote Wiring

As mentioned in another update the alternator wire from the RF harness did not reach the alternator if routed below the engine mount as recommended by the build manual. After giving it some thought I decided the best way to make that run longer was to use a single stud bus bar attached to the frame with machine screws. I used a 3ft length of 8 awg wire and shortened the RF wire and soldered a lug on it. I then wrapped it all in a silicone cover.



While I was down there I made connections to the water temp and oil pressure senders as well as completing the run to the alternator.



I connected the oil temp sender on the opposite side of the oil pan. I routed it around the front of the pan under the longer screws and used nuts and washers to keep it tucked in there.




Expansion Tank

I purchased a Mishimoto expansion tank clone. It is the same dimensions and I added the correct cap for the application. I dug up a number of threads on this tank and found that height was the main issue. First off I needed to create a mount. I have these. I used them to create mounting points for the side exhaust on my last roadster.



I had to modify them slightly by trimming down the edges. I used M8 rivnuts on the frame to anchor them. I also used 12mm spacers to lower the tank. The nice thing about this arrangement is I can add more spacers if I need to to lower it further if need be. I think it will clear as is.



The other piece of good news is this is so stout I don't need to mount the bottom stud. It has plenty of clearance. I put the boot in place and there is more than enough room. I also temp mounted part of the hood hinge for clearance and reference. I may powder coat the brackets for the tank. We will see.



Lastly I pulled the cap inlet and installed a plug. I couldn't find one at the hardware store the right size so I used one that was a slightly different size and tapped the hole. Fits nice.

[Blitzboy54]

Vacuum and Fuel

I found some cool orange Silicone tubing. I am using different colors within the engine. Vacuum will be orange. I have some 5/8 silicone tubing on order for the PCV.



I completed the fuel circuit as well



I picked up an electric bypass valve from Restomod Air. Has a rheostat that I can operate from the cockpit. Comes with easy to follow instructions. I decided to color code the hoses. Red for supply and blue for return. No real reason other than I like the way it looks.





I also picked up the flat bed toe hook. Looks pretty sharp and seems like it will do what it's designed to do. Hopefully I never need it.

[Blitzboy54]

I learned something about vacuum bleeders and brakes vs the clutch. I reported not liking the vacuum bleeder on the brakes because it pulls air in past the fitting. You can't tell when the air is all gone. So I had another person help me do it the old fashioned way. On the clutch however I was never able to fully get the air out of the slave cylinder. I tried a number of tricks and I just couldn't get it. I would imagine a pressure bleeder would work for both but just for the sake of informing folks I found the vacuum bleeder worked great for this application. I was unable to remove the "rebound" because of the air behind the cylinder. The vacuum bleeder pulled it right out. The piston rebound was immediately tight while the vacuum bleeder was operating. The clutch now moves mm to mm with the pedal.

I did have to put a spacer behind the pin that engages the clutch as it was not long enough. Based on this experience and having to modify the bracket you may want to go a different route if installing an external slave. MDL is just ok.







I also filled the TKX with sycromesh. The instructions call for 2.75 quarts. I removed the mid shift plate. I put 2.75 in and if you use a flashlight you can see the level from up there. It was right at the upper plug. So it was nice not to have to remove the side plug.

[Blitzboy54]

Radiator Installation

I am in the extreme minority of builders (at least that post here) in that I really like the radiator fan as is. I get why folks put the shroud in but for me there is something about the look of it out and exposed that I dig. I broke out the hardware that come with the fan and went to work. Also it leaves a little more room in that area and I dig that as well. I installed a 1/4 NPT to 3/8 barb elbow for the expansion tank on the left side.



I propped it up with a floor jack to center and marked it. I had to trim the frame a little on my last build to clear one of the radiator welds. This was not the case this time.



I did use the breeze lower mount again though. I have absolutely no interest in riveting my radiator to the body. This was always just a weird solution IMO. I think FFR agrees because it went away on the MK5



I tightened everything down and pinned the radiator to the lower mount per the instructions.



Last thing is I hooked a power supply up to the fan to test it. Works like it should and sounds like a fan boat. lol

I joke but this doesn't bother me either. The car is so loud I honestly never really noticed when I was driving.

[Mike.Bray]

The Factory Five supplied fan is definitely loud. I tested it on the bench in my garage and my neighbor came over asking if I was putting a jet engine in my car. Sad thing is it doesn't pull very much air for all that noise.

[Blitzboy54]

Cooling system

I continued to to integrate the cooling system. First I wanted to connect the radiator fan but first needed to finish routing the wiring harness. Also if I am going to complete the harness I mind as well install and test the horn.



I then fixed the connector to the fan. The male and female ends of the connector that come with the kit are not compatible. You can mash it together with channel locks or shave the female side. I opted to use a weather pack connector.



I ran the blue wire around the passenger side of the 4" frame tube and connected it to the orange Coyote fan trigger wire.

[Blitzboy54]

Cooling system cont

Next was time to get to work on the actual cooling lines. The lower was easy enough. I used the lower hose (came with the control pack) and married that to the corrugated steel line. I again may be in the minority but I like the steel lines that come with the kit. The Ford lower hose comes with the needed bend and the rest went together without issue.



I put my battery in as it will be covered up by the cooling system. I wonder if I will be able to change it without draining the radiator? Will find out if 5 years I guess.



I found my upper radiator hose when put in the spot it is keyed to go into contacts the power steering pump belt. So I cut off the clamp and removed the fitting. Using 2 pieces of existing radiator line and a small piece of steel I managed to manufacture myself and upper hose that does not contact the power steering pump belt but it doesn't clear it by much.



Lastly I put in the Mishimoto hose kit for the expansion tank and installed the intake. For the sake of disclosure this is not the intake I plan to use in the final build but the one I am using for now.

[Blitzboy54]

I made a few adjustments. First was the upper cooling hose. The way it's keyed it points down about 35 degrees. This creates interference or near or near interference with the power steering drive belt. I dug up a thread from 2021 and found several solutions to this. The one I liked the best is to create another key groove. So that's what I did.



This makes the fitting level. I like this fit better.



Next was I didn't like the way the upper return line was routed. I now have it above the intake elbow. It's a pre molded piece that isn't a perfect fit. I will run with it for now but could replace it with a generic hose later depending. I put in a catch can off the PCV. I have hoses for that system plumbed. This is just for first start and possibly dyno tune. I have some custom hoses coming.

[Blitzboy54]

Headers

When I purchased a Ford remanufactured engine it cam with OEM header studs and nuts. One of the things I struggled a little with my last build was the header bolts coming lose after several heat cycles. I decided that the OEM studs would be best. This turned out to be true for the passenger side. The engine also comes with OEM header gaskets.



I purchased a set of O2 sensor extension cables. This is a necessity for the passenger side. But only the passenger side. So if anyone needs a Gen 2 O2 sensor cable extension let me know. I have a spare.



The passenger header slid right into place and was relatively easy to tighten down. So far so good.



The drivers side was an entirely different kettle of fish. First, the studs have to come out. There isn't enough room to clear them and the footbox. Two of the eight you can't get the stud back in. I had to use regular bolts.



Almost all of them on the driver side was a genuine struggle to tighten down. The passenger side took 30 minutes to install, the driver was an hour and a half. But they are both in, so all's well that ends well.