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Re: 3d printed itb manifold

Posted: Tue Apr 14, 2026 7:50 am
by GDCobra
A nice project. Does make me wonder if there is any way to cross over the intakes and get a straighter air flow.
Would injectors be better closer to the inlet port? I've heard arguments both ways on this.

Re: 3d printed itb manifold

Posted: Tue Apr 14, 2026 9:35 am
by stevieturbo
GDCobra wrote: Tue Apr 14, 2026 7:50 am A nice project. Does make me wonder if there is any way to cross over the intakes and get a straighter air flow.
Would injectors be better closer to the inlet port? I've heard arguments both ways on this.
I really don't think the straight thing matters.

Injector placement perhaps a little, but then single point injection, carbs etc work fine where fuel is introduced far back. Close to the valve probably favours low speed operation, further back high speed

Reality for most, probably makes little difference.

Re: 3d printed itb manifold

Posted: Wed Apr 15, 2026 6:41 pm
by -88-
Screenshot_20260415_202057_WhatsApp.jpg
Those injectors are quite far away from cylinder head.

Re: 3d printed itb manifold

Posted: Tue Apr 21, 2026 3:17 pm
by SuperV8
scudderfish wrote: Sun Apr 12, 2026 6:22 pm
-88- wrote: Sun Apr 12, 2026 5:10 pm
FBW wrote: Sat Apr 11, 2026 8:48 pm
Can the material withstand the expected temperatures permanently?

Material is PA18CF, heat resistance of approximately 180 degrees Celsius.
If your inlet manifold gets that hot, you're probably on fire.
There are many plastic engine parts on modern engines.

Re: 3d printed itb manifold

Posted: Fri Jul 24, 2026 9:20 am
by -88-
17848807227275703654402618746073.jpg
ITB fasteners, water hose connector and blanking plate for rear end water hose hole.
17848808996633522502334866528399.jpg

Re: 3d printed itb manifold

Posted: Fri Jul 24, 2026 10:37 am
by scudderfish
That is very sexy!

Re: 3d printed itb manifold

Posted: Sat Jul 25, 2026 5:43 pm
by GDCobra
Looking very good.