Carrier Stainless Exhaust downpipes

kevin powles · #1 02-12-11, 12:51

Hi, I making some stainless carrier downpipes, Can anyone confirm they are the same profile for a wartime Flathead V8 21 stud block compared to a 24 stud block. I have aligned the first set to Shauns Ronson carrier with a 21 stud in it, I have 12 more downpipes to weld up and want to make sure they are the same before welding.

So if someone can confirm this ASAP that would be great, then I can crack on.

Thanks kevin.

Lynn Eades · #2 02-12-11, 20:31

I think the question you are asking is:
Are the exhaust manifolds interchangeable between the 21 and 24 stud motors? and I think the answer is yes. I believe the manifolds pictured below fit both engines.

kevin powles · #3 02-12-11, 20:54

Hi Lynn, Thanks for the info, I also need to know that you can take the same down pipe from a 21 stud engine and fit it to a 24 stud and both will align correctly between the manifold and the bottom casting hole mounted on the carrier floor plate.

Thanks Kevin.

Lynn Eades · #4 02-12-11, 21:02

Basically I think when Henry redesigned his block to seal better (24 stud) he never moved the exhaust ports. So I believe they have stayed the same throughout the production of the flathead.

RichardT10829 · #5 03-12-11, 10:07

Kevin quick way to check for sure is your parts book as there would be two sets of downpipes listed for different engines

but as Lynn has said i dont think they changed the cast work between blocks (externally)

kevin powles · #6 15-12-11, 09:11

Hi, Regarding the manufacture of the carrier downpipes, We hit a snag whilst making the downpipes yesterday. I decided to complete the manufacture of 10 lefthand downpipes, but the right hand ones will need to be completed after christmas now due to alignment anomalies

Its pretty clear a 21 stud block exhaust manifold is the same as a 24 stud now, but I plan to phsically check this before sending out any downpipes, so I am now ordering enough parts to make an extra 3 sets.

If anyone wants a set there are now 3 sets going spare, on this run i will have to buy the flanges in stainless to save time.

They will be £60 a set.

the following people have a set already coming; jordan, ben, ross.

thanks kev.

kevin powles · #7 04-02-12, 09:43

Hi, I have completed a run of stainless, exhaust downpipes. I have 2 more sets to finish, making 12 sets in total. I have left the ends plain at 38mm, 1 1/2". What I have found is after grit blasting two sets of cast floor elbows of 65 years of corrosion that they have opened up a bit so would not then seal if the downpipe was made to factory spec, so it is up to the individual to swage out the ends slightly so they can be tailered to your elbows.............makes sense.

they are welded both inside and outside.

Interesting point to note is these elbows are not actually a mirror image of each other, the right hand one has a longer reach than the left one.

kev.

RichardT10829 · #8 04-02-12, 12:19

Well done Kevin....some hard work been put into those !

kevin powles · #9 04-02-12, 14:23

Hi, Thanks richard, each flange was hand made, 11mm stainless plate cut and drilled with 40mm hole, managed to find some pipe flange plates at work for some of them hence some have shorter squared off flanges but i will be using those ones on my carriers.

hows that riveting going?.

kev.

RichardT10829 · #10 04-02-12, 15:06

ok i have had some practice on my own and managed to set some to a good standard.. have finally plucked up the bottle to get them banged in....hopefully monday and tuesday will see it done (as long as my block man shows up this time)

kevin powles · #11 06-02-12, 20:17

Hi, All downpipes now sold or traded, will make another batch if others are interested.

kevin.

kevin powles · #12 22-03-12, 09:43

Jordan, What I can do next week is wheel the mortar carrier out the garage and swing in a 24 stud engine, to check the alignment of what I have here, all I can say they match the canadian downpipes shaun has on 'puddle jumper' and the ronson is running presently with a set on.

Have you got new engine mounts on there, are they same spec as carrier originals, I am just thinking perhaps your engine is sitting a bit higher, If you have new mounts perhaps trial fit the fan cowling to see if the fan sits centralised. I also understand those mounts can be assemblied incorrectly, not saying yours are but its worth checking.

KEV.

kevin powles · #13 22-03-12, 20:16

Hi Jordan, I swung in a 24 stud canadian engine into the mortar carrier today. Your downpipes will fit, What you need to do is remove all four cast elbow 5/16" floor bolts, check you have the correct size gasket on the cast elbow floor flange, put in four descent bolts & nuts and leave them slack, Bolt your downpipe to the exhaust manifold up tight with the correct gasket, then tighten the four floor bolts, everything should pull into position.

I couldnt bolt the downpipe to the exhaust maifold as the bolts are sheared off in there. How are you sealing the down pipe to the floor casting?.

let me know how you get on.

kev

kevin powles · #14 22-03-12, 20:35

More pics.

kev.

RichardT10829 · #15 22-03-12, 21:24

Now thats service.... not many folk would put an engine in a carrier to check stuff fits for a customer.... well done Kev.

Now.

What would i have to do to get access to one of those antenna mounts you got on the side of yer armour

kevin powles · #16 22-03-12, 21:54

Richard, No probs on checking stuff out, had to check as I thought I might be going mad

, I have all the missing pieces on route to finish them anntena bases proper, Will lend one out when assembled complete. I have your old downpipe here for for you when you are next down.

RichardT10829 · #17 22-03-12, 21:57

email sent matey...again though good crack that you have gone to the levels you have to make sure folk get sorted. Jordan I hope you get sorted matey

Lynn Eades · #18 22-03-12, 22:59

Is the problem at the bottom end? Th ppe should be able to movein the bottom casting. It needs to be abe to move in and out freely, as well the pipe needds to be able to rotate somewhat on the ball end of the pipe. If this is not the case, the pipe will break, or worse, something else will. I think a small amout of clearance was part of the design as the fan would clear any gas leakage. The designers weren't as pc back then. I too want these pipes to work
I