opinions on quad throttles

[mrcyborg]

hey guys,
i have read so much about quad throttle boddies lately and just wondering what are people throughts on them? on one hand i have people say that on NA engines they are great but on turbo engines there is no point? why is that?
But then again, nissan have both the gtir pulsar and the gtr skylines both turbo that have individual throttle boddies?
these are not the only examples but it does beg the question anyway.
what do people think?

cheers simon.

 

[andy gray]

efi hardware do a good deal

 

[mrcyborg]

i was thinking more of skyline throttle boddies and custom manifold.

 

[Entaran]

Don't waste your time. There's not enough room in the bay to do it.

 

[mrcyborg]

fair enough opinion i guess, RPW make sets for plenty of mitsi engines. mainly the 4g engines.

 

[joe-ness]

DO IT !! :twisted: if you going to stay N/A get some porting done oversized valve springs quad throttle bodys with trumpets ... oh man this is turning me on !! nothing sounds better then a N/A motor revving off its tits !!!

 

[mrcyborg]

this car is turbo and going to stay that way, but even the quad throttle turbo engines sound quite different and raw sounding.

 

[joe-ness]

oh its already turbo ? stuff the it then get some new runners made up or just port the stock one out . going to quads on a turbo motor is a waste of money . if it came stock then yeah keep it

 

[mrcyborg]

but that my question, why is it a waste, if it makes no difference then why would nissan make both the gtr and gtir models turbo and individual throttle?
i mean if you have a 2 inch pipe from your intercooler to the throttle boddie, and then you change from a 54mm thrttole to a 60mm it makes a big difference, so why would it not make a even bigger difference going to 4 40mm throttles?

 

[Entaran]

but that my question, why is it a waste, if it makes no difference then why would nissan make both the gtr and gtir models turbo and individual throttle?
i mean if you have a 2 inch pipe from your intercooler to the throttle boddie, and then you change from a 54mm thrttole to a 60mm it makes a big difference, so why would it not make a even bigger difference going to 4 40mm throttles?

Capacity in cylinders.

The major reason the quad's are there is a "selling point" or a media buzzword. They do very little, the most you can hope for is like 0.001 seconds better throttle response and at least 26 new moving parts to break.

 

[joe-ness]

dont have a clue anymore to be frank . but nissans are well engineerd cars . but hey if you wanna try it give it ago and post up some results . but for the price of them il rather to porting (inlet/runners)

 

[mrcyborg]

my brother has a gtir pulsar, i have never read a media release or anything that claims to the quad throttles.

my engine gained decently in power when i went up in throttle size also so why would individuals not increase it too?

 

[Entaran]

Because you can only jam so much air into a cylinder. Cylinders are limited in volume.


Also, yes it was heavily advertised in the gtir media releases.

And there really isnt' enough room under the hood to put them in. I mean you're welcome to prove me wrong, but don't try and put a strut brace on. And be prepared to get a bonnet that looks like an XR8 or camaro bonnet.

 

[WRCVR4]

On a N/A motor quads allow the air to get into each cylinder FASTER by giving direct airflow to it = MUCH better throttle response.
On a Turbo motor the air is forced into the cylinder by the turbo, therefor no real benifit IMHO

On my old 4G54 i switched from a single CARBY to quad 48mm ones OMFG made a big difference and sounded OH SO SWEET (mmmm can anyone say induction noise :shock: )
Also on a old carby, it allows tuning of mixtures for each cylinder

On a turbo ? i wouldnt bother, except for the bling/braging rights :lol:

 

[mrcyborg]

well bling and bragging rights a still good, but the gtir sound very different to the normal sr20 engines for sure, and so does the rb26 engines. im just wondering why the differance?
WRC cars offen have individual throttles on them also?

 

[andy gray]

i was looking at geting it done on my car went to efi hardware in melbourne who make them for evos and lancers around the world.

And the stats looked good thay started around $1200 to $2500 and thay tune them. if that helps.

On a turbo car thay clamed that it would give u 30% more.

And on a 4g93 1.8 2002 n/a motor it was goiong to give me another 40 to 50% more gain.

But i had to do a cam hand head work and later the block.

But as is i would have pulled 140 at the wheels.
and i am all ready 90 peak at the wheels hope this helps.

 

[mrcyborg]

so there setup was onto a NA engine? or turbo? i didnt know that efi hardware did kits for lancers.
RPW makes kits but only for NA engines, i emailed them and asked about them and they said "no point on a turbo engine", i then spoke to a friend in perth that asked RPW about them on a turbo engine and he said there reply was they have not done them on turbo engines?

 

[andy gray]

Yeh this guys are the shit here is the link

http://www.speed-technology.com/

and talk to steve he will help u very good and esy to get on with