427 Cobra - Stainless Side pipes, Welding Flanges on Headers, O2 Sensor Adapter, and Start up

[@ninjapumkin]

You know what I love about your series. Like me, it looks like you are working by yourself. By one means or another get that first bolt started before your arm gets tired.

[@PetesGarage]

I prefer to work alone, it takes to long to tell someone what to do...lol

[@EJProMods]

I don't think that o2 will read correctly with that pipe because sensor will be not in gas flow and also moisture can collect and damage sensor. Some people use little extensions for o2 sensors to fake good catalytic converter condition for ecu and this much longer.

[@momchil.nikolov]

Edvinas J. Indeed, I was going to say the same thing. Pete, I have never seen such a setup, will the sensor read correctly?

[@patw52pb1]

+Edvinas J. You are correct. Bosch and NGK/NTN prohibit mounting the O2/AFR/Lambda sensor less than 10 degrees and more than 75 degrees above horizontal. Mounting the sensor below 10 degrees above horizontal damages the sensor with exhaust condensation. Mounting the sensor above 75 degrees above horizontal results in elevated sensor body temperatures and premature failure. Mounting the sensor out of the direct exhaust stream shortens the sensor life, results in inaccuracy and slows response time. Yes, the extender tube significantly reduces the sensor`s sensing ability.

[@patw52pb1]

+Momchil Nikolov From experience, no.

[@PetesGarage]

You all bring up some excellent points, thank you for your comments. There are 10 types of O2 sensors; Heated, unheated, FLO, UFLO, Planar, Titania, AFR, Wideband, Universal and Direct fit. This is a wideband sensor controlled by an Accel Wideband Controller. You are correct, typical mounting is 10 degrees off horizontal of 15 degrees off vertical. However, It is not good to place the sensor in an area where it will get too hot, that will burn it out for sure. The best way to eliminate this is by making the bung longer to take the O2 sensor out of the hot stream. I measured the exhaust temp out of the headers and it got close to 1100 degrees. That temperature would damage the sensor quickly not only from the heat, but also from the fast cooling from high velocity exhaust gas. Moving the sensor out of the stream by 2" eliminates that problem. It could cause a slight lag, but I can make up for that in the tuning. To control moisture it is best to mount it between 9 and 3 o'clock. You cannot see well in the video, but this one is right at about 8:45. I did not make that adapter. It is a commercially available product designed specifically for these type of custom installation issues. Thanks again guys!

[@retrorestore]

Nice job bud. They look great.

[@PetesGarage]

Thanks my friend

[@stevejanka361]

Don't that car sound like it's angry. Let me out of this garage and into some clean air to really roar. Lots of trial and error on a build like this. Your attention to detail makes it all worthwhile. Thanks and take care. Great video.

[@PetesGarage]

Thanks Steve, Problems always require slight adjustments.

[@marioferreira6899]

Awesome look!!! ;) They should look even better when they start changing color from the heat! Best regards.

[@PetesGarage]

I think they will be much better than chrome, I hate the bluing that happens from heat.

[@marioferreira6899]

It really comes down to a matter of taste, i'm not to keen on chrome myself as for the bluing maybe it will match up with the body depending on the color you choose! :) :) :) Love your videos, your work and can't wait to see this Cobra road worthy. Best regards.

[@PetesGarage]

Thanks Mario

[@Heavy_metal_rulez]

Awesome job Pete! Wish I could be there in person to here that thing roar!

[@PetesGarage]

Thanks my friend, maybe I'll take a country tour....

[@SteveP-vm1uc]

How will air/gases pass over the 02 sensor now that it is not in the direct flow of exhaust?? From what I know that won't work. Please correct me if I am wrong.

[@PetesGarage]

There are 10 types of O2 sensors; Heated, unheated, FLO, UFLO, Planar, Titania, AFR, Wideband, Universal and Direct fit. This is a wideband sensor controlled by an Accel Wideband Controller. You are correct, typical mounting is 10 degrees off horizontal of 15 degrees off vertical. However, It is not good to place the sensor in an area where it will get too hot, that will burn it out for sure. The best way to eliminate this is by making the bung longer to take the O2 sensor out of the hot stream. I measured the exhaust temp out of the headers and it got close to 1100 degrees. That temperature would damage the sensor quickly not only from the heat, but also from the fast cooling from high velocity exhaust gas. Moving the sensor out of the stream by 2" eliminates that problem. It could cause a slight lag, but I can make up for that in the tuning. To control moisture it is best to mount it between 9 and 3 o'clock. You cannot see well in the video, but this one is right at about 8:45. I did not make that adapter. It is a commercially available product designed specifically for these type of custom installation issues.

[@SteveP-vm1uc]

I am old school, but I have found that late model goodies are not so bad.. Matter of fact, I went for a ride in a 68' Charger with a 572 Hemi and 8:71 blower that had direct port injection. Yes, this is kind of easy to do today, but this was probably 15 years ago and that cad was scary as hell!!!!! Back then it seemed like a pile of work, but today, not so much. And honestly, for the drivability, I'd give up 15 - 20 HP... Perfect plugs all the time and drive it from sea level to mile high and not touch a damn thing.... Sounds great to me. No flooding or stalling. No pulling plugs on a regular basis!! YUP.... Mine will eventually have EFI.

[@PetesGarage]

EFI has been perfected over the years. Most of them now are self tuning.

[@FCAutos]

9:02 should've been your thumbnail lol... Good stuff!

[@PetesGarage]

DONE

[@AustrianAnarchy]

Nice work Pete!

[@PetesGarage]

Thanks my friend

[@DieselWeazel]

Looks great man!

[@PetesGarage]

Thanks Sloth

[@UGAgeorgiaDAWG]

Sounds awesome!!!

[@PetesGarage]

Nothing like it

[@100redpillcolourblind5]

Fascinated watching this whole project. Amazing engineering on the cobra v8. One question won't the exhaust eventually break at the manifold with all that vibration? Wouldn't some kind of rubberized rear mount secure it better? Just looks like a lot of vibration. But I'm addicted to your videos and workmanship. Please keep educating us. Respect.

[@PetesGarage]

I wanted to hear how it sounded so I started it before I mounted the pipe hangers. That will reduce the vibration. Thank you very much my friend.

[@100redpillcolourblind5]

Pete's Garage tottal respect. Your an inspiration to me and a brilliant engineer ..... can t wait to see the cobra finished. Much love peace and respect from Thailand.

[@PetesGarage]

Thank you very much my friend

[@callumtbjones]

Sweet. Have you thought about colour yet?

[@PetesGarage]

Traditional blue with the Wimbledon white stripes.

[@supreme2544]

Hey Pete how are you? Can't wait to watch 👍🏻

[@PetesGarage]

I'm doing great my friend, hope you are well.

[@Dannerrrr]

The O2 sensor needs to be in the flow of exhaust gas to have quick feedback on lean/rich conditions, doesn't it?

[@PetesGarage]

I can compensate for the slight lag in the computer. There are many types of O2 sensors. This one is a broadband sensor that has its own controller that communicates with the ECU.

[@jacolon61]

This is my nightmare right now. I have the same problem, touching on side, pipes are not symmetrical one sticks out more then other side, and lastly, I think they are short for this wheel base. Ugh...I don't have a welder, no one close by that can do this. The car is like yours on stands since I put the body on last Dec, in the garage, no plates, insurance so it cannot be driven. But I stuck now....Not sure what to do. I will look at this video and hope I can decide what I need to do. Question though for you Pete: If my only choice is to flatbed this car to someone I don't know where right now, to get these redone. Do you have a ballpark on what this could cost me to make a new set? Thanks and sorry for being too wordy..lol

[@PetesGarage]

That's a tough one, welding and fabrication work is expensive if you can find someone to do it. That is the whole reason I started making videos, to help people know what's involved with building this kit. I hope you can work it out.

[@jacolon61]

@@PetesGarage Thank you Pete. I know its not easy. I just don't have the equipment and no one locally to get it done. I am sure, as a DIY guy, with a never quit mentality, I will find the solution. It will just take me more time than I wanted. Thank you for all the great knowledge you share.

[@PetesGarage]

It's always a challenge

[@InvincibleExtremes]

Pretty much every boys dream car.

[@PetesGarage]

Right? I've been working on this for so long

[@marioferreira6899]

Patience is a virtue and in the end it's "built not bought"! ;)

[@PetesGarage]

Agree 100%

[@andrewamador2214]

Love your work!!! I thought you are left handed and watching the TIG welding - the welder was using right-handed torch use . Are you left-handed and do you TIG weld right-handed??? The stainless looks great!!

[@PetesGarage]

I am left handed, but I golf, bat, play hockey, and weld right handed.

[@andrewamador2214]

I'm left handed almost totally - I play guitar right handed.

[@jacolon61]

Good Video Pete! Maybe that's what I need to do, purchase SS pipes from FF. I have 351w though, not a big block. Did you also buy the headers from them for the 427?

[@PetesGarage]

I bought the headers on Ebay and modified them. It's tough to find the right set.

[@jacolon61]

@@PetesGarage So the headers are not FF? I am not sure what's going to fit. Yours look ceramic coated, correct? And you Tig welded everything. I found a good deal on FF side pipes, Now I need to get headers that at least will fit and see what mods I have to do. Thanks!

[@jmcenterprises9591]

Pete great video. What mix gas did you use with the MIG when welding the o2 sensor mount?

[@PetesGarage]

I used pure Argon. The electrode varies based on the metal being welded.

[@Djm9393]

can you do a video on how to weld

[@PetesGarage]

There are so many welding videos and channels. It would be a 3 month course on welding if I did it.

[@dranb7074]

Why are we putting an 02 Sensor on a kit car? It's not like it's going to pass emissions lol. Most states with emissions testing will give you an exemption for a vehicle with side pipes. 02 sensor for that car is really unnessesary.

[@PetesGarage]

I have the Accel Gen VII EFI system in this car, it has to have an O2 sensor for the closed loop.

[@OKRODDER]

Pete are you familiar with 6.0 LS builds

[@PetesGarage]

Yes I am, I'm working on getting one to build right now

[@OKRODDER]

I am having some issues selecting a rotating assembly and deciding if a 427 would be a reliable choice over a 408

[@ludi2shoes]

She is sounding hungry.

[@PetesGarage]

I'm dying to get it on the road.