tall vs. short inlet manifolds ??

48 posts · joined Feb 2004 · 4 Aug 2005, 4:33 pm

#393444

Anybody know what is the difference between tall and short inlet manifolds for twin carbs????

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 · 5 Aug 2005, 9:12 am

#393788

Tall mainfolds give you better Torque

I read it on FACEBOOK so it must be true

http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630

http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099

http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603

http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

tassupervee That really hurts doesnt it!

1,171 posts · joined Sep 2003 · 5 Aug 2005, 12:03 pm

#393845

Ultimately, in the rareified atmosphere of high-tech racing design, that may be the case but realistically, in the world of everyday low-tech krauts, the length of the manifold sets how high the carbies actually sit in the engine bay!!
Nothing more sinister than that! 😵
L8tr
E

Im not a complete idiot, quite a few parts are missing....

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 · 5 Aug 2005, 5:19 pm

#393976

I added 6" to the length of my intake runner and the engine picked up 20ftlbs at 4000rpm....racing engine though.
Short manifolds dont look as cool and generally move the torque peak higher in the rev range.
In the end tassupervee is right, do what fits best!

westi wrote:That's mad Alan.

tassupervee That really hurts doesnt it!

1,171 posts · joined Sep 2003 · 5 Aug 2005, 6:11 pm

#394007

Dangerous
yer M8, quite right. The gains to be had are also very dependant on a whole lot of factors including the correct exhaust system.
Strictly speaking, the exhaust should be designed with the inlet runner length as a variable and so-on and so-on.......my head hurts!!!!
L8tr
E

Im not a complete idiot, quite a few parts are missing....