Quad throttle bodies....worth it?

[type_r]

Hey guys,

Quick question.

For the cost, are individual throttle bodies for a B18c7 worth it?

I mean what kind of gains should I expect and to get those gains would I require I/H/E?

I love the induction roar that ITB gives!

Thanks

[Hondavirgin]

search is your friend :)

http://www.ozhonda.com/forum/showthread.php?t=19621&highlight=quad+throttle

see TODA AU's post.

[MrPlow]

I mean what kind of gains should I expect and to get those gains would I require I/H/E?



obviously not much research has been done...

with quad-throttle bodies - no intake is need! most leave the trumpets open - but am sure there are covers you can get to quit them down abit?

[ekslut]

yeah, you can usually get a box to go over them and has a pod filter on the end. This would quiet them down a bit.

But from what I have heard, gains would be in the mid range, and about 35hp. From graphs I have seen, they have huge amount of midrange power, but then die off at the top, to nearly stock power.

[type_r]

Sorry got a bit carried away as I have always wanted to do I/H/E abbreviation.... my bad. I do realise it replaces the standard intake.

To answer the research question I haven't researched them that much which is why I asked you guys.

Admitedly I could have done a search but I'm a NOOB and couldn't figure out how to initiate it.......I've since opened my eyes and know how.

[garett]

quads will make a huge gain as ek slut said above me some up to 35hp which is massive, however its obvious you will need to have a aftermarket ecu to run these suckers.

i think the best/easiest filters for them are unifilter socks which are just foam cups which go over the ram tubes and zip tie on. you still get the roar.

i think quads would be my ultimate modification and i have allways wanted to do it, however the costs are huge and fuel would probably quadriple

[pgclee]

Dude..if you want a Quads, your cilinder head must at least have a massive mods (Port, polish and over size) then you'll get the optimum power...I don't think anyone knows how to tune the Quads....hahaha...if there is someone who knows..tell me man...

[Steer^Gimic]

personally, quads for street is great yeh, but not practicable, or economical at all. i have heard many a case where these bad boys have been on a car for merely 2 days before getting done, and having to take them off.

and agreed with garett, you need stand-alone ecu and at least maybe some cams for reap benefits of quads.
but as i said, only for track

just my 2yen worth..

[EG5]

Dude..if you want a Quads, your cilinder head must at least have a massive mods (Port, polish and over size) then you'll get the optimum power...I don't think anyone knows how to tune the Quads....hahaha...if there is someone who knows..tell me man...

we got our quads tuned locally :rolleyes:

[EG5]

but then die off at the top, to nearly stock power.

that is not true yo!:)

[BADHBT]

listen to your heart not your brain! lol

[Limbo]

i had quad throttles on my car before, not that much power increase but the car breathes better. It was a corolla 20v, but it didn't make as much power as my civic so i sold it. It did make nice notes. Then only thing about quad throttles is it is very hard to tune as you need to tune each one tuned independently. I had an aftermarket ECU in the 20v and they managed to tune it properly. I guess that is where you guys could look for quad, a cheap 20v engine with quad throttles would be around $500-800 and you could sell the block so that would lower your costs....

[ekslut]

that is not true yo!:)

yeah, it might not be. I just remember seeing a graph that had huge midrange about 30hp more than stock, then at the top was only about 5-10hp more than stock.

But I have never used them or been in a car with them, so all I can tell you is internet knowledge (which as we all know, is varied and probably not true :D)

[blackdc2]

Dude..if you want a Quads, your cilinder head must at least have a massive mods (Port, polish and over size) then you'll get the optimum power...I don't think anyone knows how to tune the Quads....hahaha...if there is someone who knows..tell me man...

i think you must have been living under a rock or something, EGK20A has got quads on it mate when he ran the 12.3 pass...

[alta'd n13]

i wouldnt expect major increases from quad throttles to be completely honest. sometimes the amount of compression of air into your throttle body can be more a better thing than a bad.
quads will increase power but at what sacrifice?
as previously stated fuel economy will of course suffer due to the requirements of your air/fuel ratio. the more air you pump in the more fuel has to go with it.
also as previously stated, aftermarket management will be required if you want to get any sort of gain out of them. even piggy back management such as a greddy e-manage (would be a cheaper and more cost effective option) will run them to requirements.

[pgclee]

EG5,
recormand me if there is any in Melbourne...i'm kinda lost...

[rev-tech]

the idea of quads is that each individual cylinder sucks though it's own TB, therefore making less restriction in the inlet track. Compared to 4cylinders sucking though 1 TB.
It also stabilizes the pressures in the cylinder when reving the car out. No matter what size single TB you have, there's always too much air turbulance at the end for the last cylinder to suck in properly. That said, you put quads on and a box over the inlet and you've just got the problem back again!

running quads on a hard NA engine will allow it to be more driveable with wild cams and head work, too an extent you won't get the best out of them if this type of thing isn't done!
Also because of the pressure stabilizing effect you can run a higher CR without going to special fuels. A guy i know runs a crazy modded pug with 12.5:1 (and PULP), he said he'd bearly be able to crack 11 without the quads

Shane

[EG5]

Dude..if you want a Quads, your cilinder head must at least have a massive mods (Port, polish and over size) then you'll get the optimum power...I don't think anyone knows how to tune the Quads....hahaha...if there is someone who knows..tell me man...

When EGK20A ran 12.3 , it was running a stock untouched jdm k20a internals with quads.

[luzinit]

ahhh, interesting stuff.... hey, how much did EGK20A's mph increase by after getting quad tb's?

[EG5]

ahhh, interesting stuff.... hey, how much did EGK20A's mph increase by after getting quad tb's?

106.10mph (12.886@106.10mph) > Fastest mph before quads
109.53mph (12.378@109.53mph) > Fastest mph after quads.

[type_r]

Can I assume that you would expect more gains from a k20a then a b18c due to the throttle body positioning being at the front of the engine allowing greater volumes of airflow? (And of course displacement ect but not the point I'm getting at.)

Can ITB's be effective even they are sucking air from the 'wrong' side of the engine?

Thanks

[EfiOz]

Yeah, if you route the airbox the right way, or even better, make it part of a cowl induction system at the trailing ege of the bonnet.

[sifoo]

how can you guys compare a k20 engine to a b-series?

The k series has better air flow characteristics than the B - so obviosuly it would work better.

If you have a B series and you want ITBs it would better with a nice flowing head and camwork

And by the way, ITBs will be hard to tune

[BLKCRX]

how can you guys compare a k20 engine to a b-series?

The k series has better air flow characteristics than the B - so obviosuly it would work better.

If you have a B series and you want ITBs it would better with a nice flowing head and camwork

And by the way, ITBs will be hard to tune

ITBs will be hard to tune – not so true.. you just need the correct tools, and knowledge, its that simple….. A lot also depends on ITB design, some run a vacuum chamber so you can still use a MAP sensor, some only work off a TPS sensor which makes it a lil tricky.

[EfiOz]

Tuning ITB's with an Alpha-N strategy is not so hard. I've done quite a few in many different states of tune and all have had good driveability.

Dunno where you got the idea that weather should effect ITB's! Maybe you should look into this www.efi101.com