Making An Exhaust Manifold
#1
Posted 26 January 2018 - 09:53 PM
#2
Posted 26 January 2018 - 11:59 PM
I sent my car to Piper to develop a 421 manifold
Im not sure they sold many or if they worked that well..
I still have mine fitted to my car
They stopped production I think a few went back.
#3
Posted 27 January 2018 - 12:13 AM
#4
Posted 27 January 2018 - 12:19 AM
#5
Posted 27 January 2018 - 12:25 AM
#6
Posted 27 January 2018 - 07:58 AM
Has anyone got experience of making a manifold for the 2.2 ? Yes I realise that I could buy an off the shelf Tullet but I like a challenge, all parts ie header flange and pipes can be bought and it's then down to design and time. Any experience good or bad welcome. John Sent from my SM-G903F using Tapatalk
You could try Tim at TRUST, he is building his business up and has made some for the Z20LET already. He is amazingly cheap too (IMO).
#7
Posted 27 January 2018 - 08:37 AM
Edited by oakmere, 27 January 2018 - 08:38 AM.
#8
Posted 27 January 2018 - 09:20 AM
I think that is the one I have with 2" primary'sThe original TMS 4-1 was nice with equal length runners. There are no off the shelf 4-2-1 though a few including myself adapted the weapon R (tusudo) manifold from the states but the boot needs cutting. 2bular started to develop a long runner 4-1 which they said would work well on a larger displacement 4 pot but it never got past development .
#9
Posted 27 January 2018 - 09:23 AM
Relief cut which cures the warp and prevents future issues caused by thermal expansion.
Sent from my SM-G903F using Tapatalk
#10
Posted 27 January 2018 - 09:25 AM
#11
Posted 27 January 2018 - 09:33 AM
Edited by CHILL Gone DUTCH, 27 January 2018 - 09:38 AM.
#12
Posted 27 January 2018 - 09:36 AM
I made my own equal length 4-2-1 manifold, which took a while to do, but was well worth the effort
[attachment=27451:IMGP3161.JPG]
#14
Posted 27 January 2018 - 09:50 AM
Could you pm me Tim @ Trust's number Nev ? Sent from my SM-G903F using Tapatalk
http://sasautocustom...r-manifold.html
He uses 3mm walled tube which is the thickest I've heard of on an exhaust manifold and helps ensure it's longevity. Not sure he's made one for the Z22, so you'd have to ask.
As I expect you know the length and points of union of the 4-2-1 are important if you actually want the pulses to merge/scavenge at a set RPM.
Edited by Nev, 27 January 2018 - 09:54 AM.
#15
Posted 27 January 2018 - 09:54 AM
Big primary's like me vocky ( but yours look longer )
I deleted the mechanical water pump to allow the primaries to be smoother flowing, nothing is allowed to get in the way when it comes to more power
Thats an early photo, with a 2.2 engine. I have deleted the thermostat housing and pipework since then
#16
Posted 27 January 2018 - 09:57 AM
#17
Posted 27 January 2018 - 09:59 AM
a recent pic with the 2.5 litre engine
[attachment=27452:exhaust 11111.jpg]
#18
Posted 27 January 2018 - 10:00 AM
John, I've got a manifold blank plate (a plate cut and drilled to bolt onto the head onto which you weld the pipes) knocking around the garage if you wanted to make your own.
#19
Posted 27 January 2018 - 10:05 AM
Looks like that exhaust has never been hota recent pic with the 2.5 litre engine
exhaust 11111.jpg
Are you sure you drive it to the MOT station every year
#20
Posted 27 January 2018 - 10:16 AM
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