Custom tubular manifold project

[MarsaGSX]

As title says. Iam going to make custom tubular manis...Reason..$$$
DNP cost around 600usd plus 150usd shipping + 5% money transfer+ 24% of customs duty...

Actually right now I got burned new exhaust flange and turbo fllange,- draw with Corel Draw software and I draw my ex channels bigger +4mm in "diameter" almost like stock seal.Now I got maybe 55mm long channels and 40mm high..And Iam affraid if it´s not very huge for my TO4E 50trim...??? I think I get better spool up
Now I will use 50!!mm inside Diameter exhaust pipes from head to charger...huge??
BTW.actualy Match ported...
Give me some suggestion please.


I post this "custom manis project question" in here and you can check pics inside...
http://www.dsmtuners.com/forums/showthread.php?t=214656
didn´t wnat to start new thread..but No answer and need help..
Thank you

 

[1SloColt]

More velocity = better spool up. Try smaller ports for better spool up. Larger ports = better topend flow.

 

[MarsaGSX]

More velocity = better spool up. Try smaller ports for better spool up. Larger ports = better topend flow.

Yeah..
checked your profile/you run ported 2G manis...which "Diameter" - proportions -are your channels/runners now?

 

[1stGenRocks]

did you consider buying a ebay mani and rewelding it? for the amount of work involved to make one from scratch it might be worth it.

 

[MarsaGSX]

did you consider buying a ebay mani and rewelding it? for the amount of work involved to make one from scratch it might be worth it.

yeah, calculated..
xspower cost around 200usd..don´t know sure..
but everytime I have to pay 150usd for shipping to Czech, 5% for money transfer to my Bank+PayPal and Customs duty 24% ..
I checked both steel flanges- Head/turbo/O2housing for FREE plus checked free 50mm inside tubes!
Me with uncle will weld with CO2 welder aggregate I think...TIG..or so

on beggining I ordered UPC SS manis from Logic Performance for 280usd ,but Chris told me they are out of Stock...for 4months need manis to build custom IC pipes..install turbo/oil and finally build Exhaust sytem.
So, starts check somewhere else...result..build custom

 

[MarsaGSX]

Next Question..
What about Lenghts of each runners..Have to be same,or may I make differnt?we talk about few milimeters difference.
like this two styles..but will go to easier..
Do you know about some "HOW-TO" for custom tubulars?
thank you

 

[MarsaGSX]

Definetly love race style..but UPC are good too...talking about good look...
BTW last tubulars looks ..okay..and I think spool up will be best..??
any opinion???

 

[eclipsegsx9797]

Junk

 

[vintagemuscle]

Definetly love race style..but UPC are good too...talking about good look...
BTW last tubulars looks ..okay..and I think spool up will be best..??
any opinion???

the last tubular manifold in the pic would be no better than running a cast manifold. cylinders #2 and #3 are much shorter and dump into cylinders #1 and #4 at a very flow restricting angle. also for a daily driver tubular manifolds are not very practical as they raise under hood temps significantly and are prone to cracking.

 

[MarsaGSX]

the last tubular manifold in the pic would be no better than running a cast manifold. cylinders #2 and #3 are much shorter and dump into cylinders #1 and #4 at a very flow restricting angle. also for a daily driver tubular manifolds are not very practical as they raise under hood temps significantly and are prone to cracking.

Yeah..double check it..you are right with last pic.! So 2nd tubulars(I think OBX) won...
back to lenghts..is it really necessary to be same?cus turbo charger flange isn´t in middle..is in place of 3rd cylinder.So..logically lenghts are differnt..1st and 4th are diffrent..2nd and 3rd too..Do I need to compensate?

 

[MarsaGSX]

threw this weekend started with building my custom tubulars.
check pics,and tell me what ya think
BTW never ever will make again

 

[v2ner]

Those welds look kinda thin to me.

 

[talontsi18]

Those welds look kinda thin to me.

Those are just tack welds. You weld it like that when your first setting up whatever your welding, it helps so you can easily adjust your pipe, bend, and so on. Marsagsx, I think its great that you are making your own manifold! I hope it turns out good.

 

[alex99gst]

Looks like it is coming together well. I would make sure you are using the same kind of metal for the flanges and piping as I've heard about stainless steel being welded to cast and not heating up/cooling down at the same rates and causing ing. Other than that it looks like you are off to a good start.

 

[blcknspo0ln]

Venca,
Like I said in my email to you, that looks GREAT! I hope you get your car up and running soon, I'd love to see some videos after you're done. GOOD JOB and keep on going!

 

[MarsaGSX]

Those welds look kinda thin to me.

how talontsi18 wrote-these are just fitment welds "point-weld" how we say
Venca

 

[MarsaGSX]

Those are just tack welds. You weld it like that when your first setting up whatever your welding, it helps so you can easily adjust your pipe, bend, and so on. Marsagsx, I think its great that you are making your own manifold! I hope it turns out good.

hey,thank you for praisful add
iam little bit affraid cus using 50mm inside" Diameter-most of other tubulars using 42mm. Of course my head runners are port matched with exhaust manis flange.
yeah, I can´t calculate with some low spool up on my 50trim...but hope for TOP End
Venca

 

[MarsaGSX]

Looks like it is coming together well. I would make sure you are using the same kind of metal for the flanges and piping as I've heard about stainless steel being welded to cast and not heating up/cooling down at the same rates and causing ing. Other than that it looks like you are off to a good start.

hey,
my flanges are made from 11523 and that elbows with straight are weldless tube. easy can hold more then 1300+°C
800°C =1472°F
but you are right..3 different matterials are not well..flange,elbow,welds..
Hope this weekend will finished and then finished whole 50trim setup..this manis are BIG brake for me...only one thing and can´t continue
and got long way to run my "NEW" baby... next will be custom 3" Turbo-Back
Venca

 

[MarsaGSX]

Venca,
Like I said in my email to you, that looks GREAT! I hope you get your car up and running soon, I'd love to see some videos after you're done. GOOD JOB and keep on going!

hey bro
thank you again...can´t wait to see how will look my manis and whole engine bay...and how will run my Baby
yeah will make some vids,but don´t have any space on internet to post...
Of course will be asking you again on....
Thank you for help
Venca

 

[MarsaGSX]

next pics..
right now Iam in process of finally welding...tommorow should be finished
You can check that we changed diameter on last 4 elbows...we had issues with space ..was hard to fit four 50mm dia runners into turbo flange..
have to say that we changed maybe 4times..taked out...watch for fitment to another elbow...hmmm No..have to change it...then we cut in some degree and weld on..of course after every single cutting..I cleaned out inside dia from "frays"-don´t know how to translate batter..You know I mean
Venca

 

[blcknspo0ln]

That looks GREAT Venca! Post the final results and get that beast on road!

 

[exile]

Looks good man, when you do the final welding will you remove 3 of the 4 runners and weld them 1 at a time? I can't imagine getting a welder down into those crevises.

Also, there's a really good tutorial on here on how to polish really well. I think you should check it out.
http://www.dsmtuners.com/forums/showthread.php?t=213471

 

[avw0516]

Wow, great work Venca. Make sure to let us know how it goes when its done.
-Andrew

 

[Byrd]

Very nice in deed. Prepare to have heat related issues! Get some header wrap and some silicone asap.

 

[MarsaGSX]

to exile..
for finall welding removed last 4elbows+center which goes to turbo..check new pics.
my way is to use exhaust wrap...got at home

to avW..
Andrew..already done

to Byrd
my wrap is ready to instal on my new manis..only have make new hole/thread for EGT gauge

Thank you guys for nice "feedback"