i was having a look last night and i reckon i got enough room to have the airbox mounted at 90 degrees to the throttle bodies using silicon hose.

would this give much more tourque than having the airbox on the end of the tb's?? and is it worth doing?

scuse the shite pic lol...




any info appreciated

 

are you running trumpets with socks?
you need to play about with the length of the trumpet to tune your power curve

 

ive got a k&n universal airbox that goes over all 4 trumpets, and as i understand, the longer the better for the trumpets, so the silicon is in effect making the trumpet longer.

all the trumpets are the length of the outer shorted 2 cos thats all the room i have, unless i do the 90 degree thing

 

Just give up mate and sell the whole setup to me

 

not true
and the bend might act as if it was shorter,,,, best bet is to get too a rollign road with a couple of different setups and try them

 

ok mate

Ł800 and its yours

 

Hmm maybe not then!

I've got some diagrams around someone that someone drew for my explaning overall bhp vs torque using throttle bodies.

Ill see if I can dig them out

 

ok gareth, cheers mate.

although on the TVRs they just use bloody great long bits of silicon

 

like this

 

have you read practical classics this month by any chance?

 

no mate?

why?

 

theres a tvr with really long inlet runners in there somewhere

 

wtf this reply was supposed to be on the 10k rpm fez one...

 

up for anyone else

 

i told him about that mate lol

 

A few pics that may help

 

andy, that looks pretty sweet, but mine aint turboed lol, just the tb's

 

 

If you wanted to be really fancy you could make a set of telescopic bell mouths to alter the tuned length at different rpms.

These could either be controled with a stepper motor and some sort of ECU out put or pulled out by by vacum against a spring.

With no vacum (high rpm/load) the spring would pull them short and at lower rpm/load the vacum would act aginst the spring and pull them out to full extension.

The ECU out put would be better as it would be more mappable.

Whatdya think????????

 

lol i think thats way too complicated, kinda like the ST170 inlet.. hmmm

dont think i got enough space for all that anyway...

the reason of this post is cos in the top pic i done, thats all the space there is, short trumpet and airbox.

but if i had the airbox at 90 degrees i could make the inlet tract longer...

 

The problem is with out some very sophisticated software, the only way you are going to get the correct tuned lengths is some dyno time and silicone tube that you can cut up.

 

ah well, ill just do what i was gonna do in the 1st place for now (1st pic)

cheers mate

 

How much can you realistically lose from the wrong length inlet, and even it wasn't optimum, I'm presuming you'd still see a half-decent increase?