intake runner length

[tom sparks]

One effect will be the shifting of the torque curve upward.  It will
probably reduce low speed torque to benefit high speed torque.  Probably at
a  higher speed than is really useful or possible.   It will likely affect
gas mileage too.

Since this is a factory engineered dimension there was most likely a good
reason for it.  It would probably be a better idea to construct a heat
shield and provide some ducting with a fan of some sort.

1982 Accords had the same problem and the factory provided just such a fix.
I heard it worked.  I could probably use it on mine but Honda doesn't sell
it anymore.

If it is a cooling problem, fix the cooling problem, don't mess with
everything else.  That's my $00.02.   Hope it helps.

Best regards,
Thomas Sparks



At 10:09 7/1/96 +0000, you wrote:
>what is the effect of the runner length on the intake manifold?  In 
>my car there is the head, then there are some little runners about 2" 
>long wherein the injectors are mounted, then attached to those 
>runners are some long (like a foot) "U" shaped runners that curve up 
>so right above the cam cover it connects to the intake plenum, 
>throttle, etc.
>
>What I have considered doing is somehow relocating the intake plenum 
>over to the intake side of the engine, since currently all the intake 
>plumbing sits right on top of the exhaust manifold where lots of hot 
>air is while the car is idling (in traffic, causes it to run really 
>rough after idling in traffic, stall, etc.).  However, if I 
>fabricate runners that are as long as the stock runners, like a foot 
>or more, it won't fit under the hood.
>
>So what will the effect be if I shorten these runners, or just bolt 
>up the plenum right onto those little 2" runners (it looks like it'll 
>bolt up).
>
>Thanks :)
>_____________________________________________________________________________
>Josh Karnes                                                 joshk at tanisys.com
>Renaissance Man                        http://www.tanisys.com/~joshk/home.htm
>Tanisys Technology                                     http://www.tanisys.com
>Austin, Texas                      '78 BMW 530i | '72 Datsun 240Z | IZCC #308
>_____________________________________________________________________________
>           *** opinions expressed herein are MINE, ALL MINE!! ***
>
>