Custom Intake Matters

[SYeNi69]

Hi all Guru's and Sifu's

i would like your expert opinions regarding custom intakes ... btw i'm talking about Drag Specs

1. Some say those trumpets connected to the runners are of no use because during high boost, anything above 1.5bar ... these trumpets become resistance towards the forced air ... the use for it is to give equal amount of air to each cylinder so that a normal turbo car can rev up smoothly ... but if for high boost applications especially drag cars ... it doesn't apply ... how true is this ... please elaborate ? p.s. most branded performance intake don't have these trumpets :)

2. A big plenum is important so that the plenum stores enough compressed air in it ... especially after shifting gears so that the car 'tak termenung' ... usually a normal car will have a minor stall after shifting gears at wot. ... Some intakes i see have very small plenum ?? how ... Please elaborate ...

3. Is there such a thing as 'kira-kira' when it comes to designing a custom intake(especially here in M'sia) if yes what is there to count ? short runner/big plenum thats about it ... i think ... care to elaborate more ?

4. How do i determine the size for a TB to fit in a custom intake ? is there some mathematical way to know ? or just RND and hear what other people say ... ?

If u guys have other info to share regarding custom intakes please do share

Thx again for ur time ... late post cause having prob sleeping thiking about this and searching the internet for answers ... :sleep:

 

[ek_elleh]

looking forward for answer from otai2..

 

[nurburing]

hahahahahahahahahahahahahahahahahahahahaha

 

[panjang ensem]

how can u pencen when u never even started????

me takpe, have enough piala too boost to my kids in later years.......wakakakakak

 

[SYeNi69]

how can u pencen when u never even started????

me takpe, have enough piala too boost to my kids in later years.......wakakakakak

takpelah ... i'm not into piala's wakakakakaka what do u know panjang ? what do u know ? hehehehe ... aku utk syok2 jer ... weekend car ... got too many cars at home

dah la jang ... enough of this .... back to topic ...

 

[HKS-GT2835R]

If u guys have other info to share regarding custom intakes please do share

Thx again for ur time ... late post cause having prob sleeping thiking about this and searching the internet for answers ... :sleep:

you like reading?

http://www.not2fast.com/gasflow/Lecture08/Lecture08_files/v3_document.htm

and some photos..

http://www.bufkinengineering.com/intake%20manifolds.htm

 

[panjang ensem]

anyway good luck to u mr syenie mat speed...........if u need some advice on building a piala collection 250HP kancil enjin with just under rm6K, then give me a call........:wavey:

 

[xbalance2002]

guy/ sifu
most of the custom Intake is make of steel is it possible to use alloy tube, who able to make intake with alloy tube?

 

[SYeNi69]

anyway good luck to u mr syenie mat speed...........if u need some advice on building a piala collection 250HP kancil enjin with just under rm6K, then give me a call........:wavey:

hahaahahaha .. ko memang sial .. hahahahaha ...

 

[xtremeleo]

i prefer an intake runner dat promotes low end torque but at the same doesnt neglect high end power, so a bigger diameter, long, independent, intake runner for each cylinder is preferred. dont forget, air reservoir just before the throttle shud hold twice the engine capacity

 

[huakenny]

trial and error.....

 

[SYeNi69]

i prefer an intake runner dat promotes low end torque but at the same doesnt neglect high end power, so a bigger diameter, long, independent, intake runner for each cylinder is preferred. dont forget, air reservoir just before the throttle shud hold twice the engine capacity

any comments on the trumpets ?

btw has anyone had the chance to try an intake with and without trumpet on the same car ?

 

[HKS-GT2835R]

any comments on the trumpets ?

btw has anyone had the chance to try an intake with and without trumpet on the same car ?

well, no.

but here's some more reading.

the interesting part is where it says "More on Intakes"

http://autospeed.com/A_107746/cms/article.html

another on trumpets:
http://autospeed.com/A_110771/cms/article.html

and another:
http://autospeed.com/A_107771/cms/article.html

interesting part :
" Pioneering work done by Jaguar on their mechanically injected racing engines showed that it was possible to gain more than 100 per cent volumetric efficiencies (VE) by using very long intake runners. This means that the cylinders actually breathed in more than their swept volume"

and..

"One equation for runner diameter is to multiply the engine volume in litres by the engine's volumetric efficiency, then by the tuned rpm, then divide this sum by 3330. The final figure is square rooted, giving the runner diameter in inches. As an example, a 5 litre engine with an 80 per cent efficiency (expressed as 0.8) and tuned for 3000 rpm, will have a runner diameter of 1.9 inches, or 48 mm. The volume of the plenum should be around 80 per cent of the volume of the cylinders to which it is connected."