Spare intake pods anyone please?

[Brummmie]

Hi Guys,

I am looking at a few mods to the intake side (longer trumpets).
It seems the theory would be 21" from the back of the valve, the only way to do this would be to replicate the Whirlwind type affair that you guys have, either directly from one bank to the side, or cross them over for extra length.

Can anyone post a couple of pics standard and modded?

Does anyone have any intake pods spare so i can look at using those?
Just to offer them up at first to see if i have the room.

Cheers Paul.

[Brummmie]

And also what dimension is the intake side of your hoses, probably less than 55mm i would think?

Cheers

[SimonKD]

Hi Paul, here's a couple of shots.









Hope they are some help, I'll get a ruler under the bonnet later to measure the air box stabbing diameters unless someone else does in the meantime.

Regards
Simon

[Brummmie]

Smashing, thats the kind of thing i was looking at.
I assume the longer X-over pipes give more torque?
Do they improve power everywhere or just mid range?

I will play with intake lengths with straight tubes dragster stylee, to find the best length then go from there.
Could really do with seeing if the standard pods will still go in

[gruffalo]

X over pipes give more low down driveability and torque while the shorter induction gives more power in the top half of the rev range.

[Brummmie]

gruffalo said:

X over pipes give more low down driveability and torque while the shorter induction gives more power in the top half of the rev range.

So its a trade off?

[gruffalo]

Yes, it always is unless you go to the completity of having long and short induction paths that automatically move from one to the other.

I had a 3Ltr V6 Pug 406 once that did this loads of low down pull and a noticable kick in the back when it got to about 4K RPM and opened the short path, how you would do this I do not know.

[Brummmie]

gruffalo said:

Yes, it always is unless you go to the completity of having long and short induction paths that automatically move from one to the other.

I had a 3Ltr V6 Pug 406 once that did this loads of low down pull and a noticable kick in the back when it got to about 4K RPM and opened the short path, how you would do this I do not know.

I have played with trumpet length already, but very small increments due to packaging, i extended them by 15mm and was power up everywhere, so win win, ok only 4/4 bhp/trq. was wondering what really lengthening did, as per those two.

[Gazzab]

I am sure that Joolz and I did once talk about trying longer, rather than shorter, induction as this should see improvements in bhp and torque but without moving the torque curve to the right.

[SimonKD]

Unlike the standard airbox backplates my carbon ones have trumpets inside which give a slightly differant power curve using the short inlet hoses. I think Tim at ACT said the midrange torque is increased but don't quote me on this. I'm sure he would explain properly if you contacted him.
At work atm so not had chance to measure the inlet hose/stabbing diameters.

Mine look like this

http://www.actproducts.co.uk/shop/images/act/Cerbe...

Regards
Simon

Edited by SimonKD on Wednesday 11th May 12:40

[Cyclone1]

Longer primary pipes (flexi one's)' with the shorter induction yielded an increase in both torque and power through the range, this works with individual cone filters added but need routing down the front of the engine bay. A larger air box also adds gains through the range, as does increasing the size of the section that holds the filter, advantage here is to increase the surface area, hence the use of the "egg box" surfaced air filters back in the day!

The short induction allows for the map to be smoothed out at the bottom end of the rev range hence improving torque/power there and thus further up the range, it is this that actually improves drivability as well. As mentioned short induction such as Whirlwind also improves top end breathing and hence you will see mapped cars hold over 400bhp between 6/6500 & 7500 rpm.

Jules

[pmessling]

i have spare 4.5 air boxes, but ideally want to sell them, all bar about 3 of the backplate trumpets need repairing due to being crushed.

[SimonKD]

Brummmie said:

And also what dimension is the intake side of your hoses, probably less than 55mm i would think?

Cheers

Mine are 50mm

Regards
Simon

[Brummmie]

SimonKD said:

Mine are 50mm

Regards
Simon

Cheers Simon, thought that might be too easy!